NO Ultimate: Cannot open display: This is Ultimate 0.1.24-8dc7c08-m [2020-06-22 05:11:23,114 INFO L170 SettingsManager]: Resetting all preferences to default values... [2020-06-22 05:11:23,116 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2020-06-22 05:11:23,127 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-06-22 05:11:23,127 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-06-22 05:11:23,128 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-06-22 05:11:23,130 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-06-22 05:11:23,131 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2020-06-22 05:11:23,133 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-06-22 05:11:23,133 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-06-22 05:11:23,134 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-06-22 05:11:23,134 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-06-22 05:11:23,135 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-06-22 05:11:23,136 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-06-22 05:11:23,137 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-06-22 05:11:23,138 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-06-22 05:11:23,139 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-06-22 05:11:23,140 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-06-22 05:11:23,142 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2020-06-22 05:11:23,144 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-06-22 05:11:23,145 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-06-22 05:11:23,146 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-06-22 05:11:23,148 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-06-22 05:11:23,148 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-06-22 05:11:23,149 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-06-22 05:11:23,149 INFO L174 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-06-22 05:11:23,150 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-06-22 05:11:23,150 INFO L177 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-06-22 05:11:23,151 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-06-22 05:11:23,151 INFO L174 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-06-22 05:11:23,152 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-06-22 05:11:23,153 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2020-06-22 05:11:23,154 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-06-22 05:11:23,154 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2020-06-22 05:11:23,154 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-06-22 05:11:23,154 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-06-22 05:11:23,155 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2020-06-22 05:11:23,156 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2020-06-22 05:11:23,156 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2020-06-22 05:11:23,156 INFO L98 SettingsManager]: Beginning loading settings from /export/starexec/sandbox2/solver/bin/./../termcomp2017.epf [2020-06-22 05:11:23,171 INFO L110 SettingsManager]: Loading preferences was successful [2020-06-22 05:11:23,171 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2020-06-22 05:11:23,172 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-06-22 05:11:23,172 INFO L133 SettingsManager]: * Rewrite not-equals=true [2020-06-22 05:11:23,172 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2020-06-22 05:11:23,173 INFO L133 SettingsManager]: * Minimize states using LBE with the strategy=SINGLE [2020-06-22 05:11:23,173 INFO L133 SettingsManager]: * Use SBE=true [2020-06-22 05:11:23,173 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-06-22 05:11:23,173 INFO L133 SettingsManager]: * Use old map elimination=false [2020-06-22 05:11:23,173 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2020-06-22 05:11:23,174 INFO L133 SettingsManager]: * Buchi interpolant automaton construction strategy=DANDELION [2020-06-22 05:11:23,174 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2020-06-22 05:11:23,174 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-06-22 05:11:23,174 INFO L133 SettingsManager]: * Construct termination proof for TermComp=true [2020-06-22 05:11:23,174 INFO L133 SettingsManager]: * Command for external solver (GNTA synthesis)=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:23,174 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-06-22 05:11:23,175 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-06-22 05:11:23,175 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2020-06-22 05:11:23,175 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2020-06-22 05:11:23,175 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-06-22 05:11:23,175 INFO L133 SettingsManager]: * How to treat unsigned ints differently from normal ones=IGNORE [2020-06-22 05:11:23,176 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-06-22 05:11:23,176 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-06-22 05:11:23,176 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-06-22 05:11:23,176 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-06-22 05:11:23,176 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-06-22 05:11:23,177 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-06-22 05:11:23,177 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2020-06-22 05:11:23,177 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-06-22 05:11:23,202 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-06-22 05:11:23,216 INFO L259 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-06-22 05:11:23,219 INFO L215 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-06-22 05:11:23,221 INFO L271 PluginConnector]: Initializing CDTParser... [2020-06-22 05:11:23,221 INFO L276 PluginConnector]: CDTParser initialized [2020-06-22 05:11:23,222 INFO L430 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /export/starexec/sandbox2/benchmark/theBenchmark.c [2020-06-22 05:11:23,284 INFO L221 CDTParser]: Created temporary CDT project at /export/starexec/sandbox2/tmp/814b46e3595f4ff6967bf9dbd1dbca8d/FLAGb884686b4 [2020-06-22 05:11:23,618 INFO L307 CDTParser]: Found 1 translation units. [2020-06-22 05:11:23,619 INFO L161 CDTParser]: Scanning /export/starexec/sandbox2/benchmark/theBenchmark.c [2020-06-22 05:11:23,626 INFO L355 CDTParser]: About to delete temporary CDT project at /export/starexec/sandbox2/tmp/814b46e3595f4ff6967bf9dbd1dbca8d/FLAGb884686b4 [2020-06-22 05:11:24,030 INFO L363 CDTParser]: Successfully deleted /export/starexec/sandbox2/tmp/814b46e3595f4ff6967bf9dbd1dbca8d [2020-06-22 05:11:24,042 INFO L297 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-06-22 05:11:24,043 INFO L131 ToolchainWalker]: Walking toolchain with 7 elements. [2020-06-22 05:11:24,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-06-22 05:11:24,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-06-22 05:11:24,048 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2020-06-22 05:11:24,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.06 05:11:24" (1/1) ... [2020-06-22 05:11:24,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5683bb8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 05:11:24, skipping insertion in model container [2020-06-22 05:11:24,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.06 05:11:24" (1/1) ... [2020-06-22 05:11:24,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-06-22 05:11:24,077 INFO L176 MainTranslator]: Built tables and reachable declarations [2020-06-22 05:11:24,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-06-22 05:11:24,236 INFO L191 MainTranslator]: Completed pre-run [2020-06-22 05:11:24,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-06-22 05:11:24,319 INFO L195 MainTranslator]: Completed translation [2020-06-22 05:11:24,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 05:11:24 WrapperNode [2020-06-22 05:11:24,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-06-22 05:11:24,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-06-22 05:11:24,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-06-22 05:11:24,321 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2020-06-22 05:11:24,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 05:11:24" (1/1) ... [2020-06-22 05:11:24,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 05:11:24" (1/1) ... [2020-06-22 05:11:24,354 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-06-22 05:11:24,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-06-22 05:11:24,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-06-22 05:11:24,355 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2020-06-22 05:11:24,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 05:11:24" (1/1) ... [2020-06-22 05:11:24,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 05:11:24" (1/1) ... [2020-06-22 05:11:24,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 05:11:24" (1/1) ... [2020-06-22 05:11:24,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 05:11:24" (1/1) ... [2020-06-22 05:11:24,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 05:11:24" (1/1) ... [2020-06-22 05:11:24,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 05:11:24" (1/1) ... [2020-06-22 05:11:24,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 05:11:24" (1/1) ... [2020-06-22 05:11:24,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-06-22 05:11:24,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-06-22 05:11:24,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-06-22 05:11:24,372 INFO L276 PluginConnector]: RCFGBuilder initialized [2020-06-22 05:11:24,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 05:11:24" (1/1) ... No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-06-22 05:11:24,441 INFO L130 BoogieDeclarations]: Found specification of procedure Ack [2020-06-22 05:11:24,442 INFO L138 BoogieDeclarations]: Found implementation of procedure Ack [2020-06-22 05:11:24,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-06-22 05:11:24,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-06-22 05:11:24,579 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-06-22 05:11:24,579 INFO L286 CfgBuilder]: Removed 4 assue(true) statements. [2020-06-22 05:11:24,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:11:24 BoogieIcfgContainer [2020-06-22 05:11:24,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-06-22 05:11:24,581 INFO L113 PluginConnector]: ------------------------BlockEncodingV2---------------------------- [2020-06-22 05:11:24,581 INFO L271 PluginConnector]: Initializing BlockEncodingV2... [2020-06-22 05:11:24,583 INFO L276 PluginConnector]: BlockEncodingV2 initialized [2020-06-22 05:11:24,584 INFO L185 PluginConnector]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:11:24" (1/1) ... [2020-06-22 05:11:24,599 INFO L313 BlockEncoder]: Initial Icfg 17 locations, 22 edges [2020-06-22 05:11:24,601 INFO L258 BlockEncoder]: Using Remove infeasible edges [2020-06-22 05:11:24,602 INFO L263 BlockEncoder]: Using Maximize final states [2020-06-22 05:11:24,602 INFO L270 BlockEncoder]: Using Minimize states even if more edges are added than removed.=false [2020-06-22 05:11:24,602 INFO L276 BlockEncoder]: Using Minimize states using LBE with the strategy=SINGLE [2020-06-22 05:11:24,604 INFO L296 BlockEncoder]: Using Remove sink states [2020-06-22 05:11:24,605 INFO L171 BlockEncoder]: Using Apply optimizations until nothing changes=true [2020-06-22 05:11:24,605 INFO L179 BlockEncoder]: Using Rewrite not-equals [2020-06-22 05:11:24,620 INFO L185 BlockEncoder]: Using Use SBE [2020-06-22 05:11:24,635 INFO L200 BlockEncoder]: SBE split 2 edges [2020-06-22 05:11:24,639 INFO L70 emoveInfeasibleEdges]: Removed 0 edges and 0 locations because of local infeasibility [2020-06-22 05:11:24,641 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-06-22 05:11:24,648 INFO L100 BaseMinimizeStates]: Removed 2 edges and 1 locations by large block encoding [2020-06-22 05:11:24,650 INFO L70 RemoveSinkStates]: Removed 4 edges and 3 locations by removing sink states [2020-06-22 05:11:24,652 INFO L70 emoveInfeasibleEdges]: Removed 0 edges and 0 locations because of local infeasibility [2020-06-22 05:11:24,652 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-06-22 05:11:24,656 INFO L100 BaseMinimizeStates]: Removed 2 edges and 1 locations by large block encoding [2020-06-22 05:11:24,657 INFO L70 RemoveSinkStates]: Removed 0 edges and 0 locations by removing sink states [2020-06-22 05:11:24,657 INFO L70 emoveInfeasibleEdges]: Removed 0 edges and 0 locations because of local infeasibility [2020-06-22 05:11:24,657 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-06-22 05:11:24,657 INFO L100 BaseMinimizeStates]: Removed 0 edges and 0 locations by large block encoding [2020-06-22 05:11:24,658 INFO L70 RemoveSinkStates]: Removed 0 edges and 0 locations by removing sink states [2020-06-22 05:11:24,658 INFO L313 BlockEncoder]: Encoded RCFG 12 locations, 18 edges [2020-06-22 05:11:24,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 22.06 05:11:24 BasicIcfg [2020-06-22 05:11:24,659 INFO L132 PluginConnector]: ------------------------ END BlockEncodingV2---------------------------- [2020-06-22 05:11:24,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-06-22 05:11:24,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-06-22 05:11:24,663 INFO L276 PluginConnector]: TraceAbstraction initialized [2020-06-22 05:11:24,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.06 05:11:24" (1/4) ... [2020-06-22 05:11:24,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba8c24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:11:24, skipping insertion in model container [2020-06-22 05:11:24,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 05:11:24" (2/4) ... [2020-06-22 05:11:24,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba8c24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:11:24, skipping insertion in model container [2020-06-22 05:11:24,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:11:24" (3/4) ... [2020-06-22 05:11:24,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba8c24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:11:24, skipping insertion in model container [2020-06-22 05:11:24,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 22.06 05:11:24" (4/4) ... [2020-06-22 05:11:24,667 INFO L112 eAbstractionObserver]: Analyzing ICFG theBenchmark.c_BEv2 [2020-06-22 05:11:24,678 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2020-06-22 05:11:24,689 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 0 error locations. [2020-06-22 05:11:24,706 INFO L257 AbstractCegarLoop]: Starting to check reachability of 0 error locations. [2020-06-22 05:11:24,734 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2020-06-22 05:11:24,734 INFO L382 AbstractCegarLoop]: Interprodecural is true [2020-06-22 05:11:24,734 INFO L383 AbstractCegarLoop]: Hoare is true [2020-06-22 05:11:24,735 INFO L384 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2020-06-22 05:11:24,735 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-06-22 05:11:24,735 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-06-22 05:11:24,735 INFO L387 AbstractCegarLoop]: Difference is false [2020-06-22 05:11:24,735 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-06-22 05:11:24,735 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-06-22 05:11:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-06-22 05:11:24,758 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-06-22 05:11:24,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-06-22 05:11:24,825 INFO L451 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: true [2020-06-22 05:11:24,825 INFO L448 ceAbstractionStarter]: For program point L13(lines 13 14) no Hoare annotation was computed. [2020-06-22 05:11:24,826 INFO L451 ceAbstractionStarter]: At program point L14-1(line 14) the Hoare annotation is: true [2020-06-22 05:11:24,826 INFO L448 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-06-22 05:11:24,826 INFO L448 ceAbstractionStarter]: For program point AckFINAL(lines 10 15) no Hoare annotation was computed. [2020-06-22 05:11:24,826 INFO L451 ceAbstractionStarter]: At program point L13-1(line 13) the Hoare annotation is: true [2020-06-22 05:11:24,826 INFO L448 ceAbstractionStarter]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-06-22 05:11:24,827 INFO L448 ceAbstractionStarter]: For program point L13-2(line 13) no Hoare annotation was computed. [2020-06-22 05:11:24,827 INFO L448 ceAbstractionStarter]: For program point AckEXIT(lines 10 15) no Hoare annotation was computed. [2020-06-22 05:11:24,827 INFO L451 ceAbstractionStarter]: At program point AckENTRY(lines 10 15) the Hoare annotation is: true [2020-06-22 05:11:24,827 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-06-22 05:11:24,827 INFO L451 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: true [2020-06-22 05:11:24,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:11:24 BasicIcfg [2020-06-22 05:11:24,831 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-06-22 05:11:24,832 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-06-22 05:11:24,832 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-06-22 05:11:24,835 INFO L276 PluginConnector]: BuchiAutomizer initialized [2020-06-22 05:11:24,836 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-06-22 05:11:24,836 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.06 05:11:24" (1/5) ... [2020-06-22 05:11:24,837 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@e631e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.06 05:11:24, skipping insertion in model container [2020-06-22 05:11:24,837 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-06-22 05:11:24,837 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 05:11:24" (2/5) ... [2020-06-22 05:11:24,837 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@e631e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.06 05:11:24, skipping insertion in model container [2020-06-22 05:11:24,838 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-06-22 05:11:24,838 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:11:24" (3/5) ... [2020-06-22 05:11:24,838 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@e631e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.06 05:11:24, skipping insertion in model container [2020-06-22 05:11:24,839 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-06-22 05:11:24,839 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 22.06 05:11:24" (4/5) ... [2020-06-22 05:11:24,840 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@e631e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.06 05:11:24, skipping insertion in model container [2020-06-22 05:11:24,840 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-06-22 05:11:24,840 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:11:24" (5/5) ... [2020-06-22 05:11:24,841 INFO L375 chiAutomizerObserver]: Analyzing ICFG theBenchmark.c_BEv2 [2020-06-22 05:11:24,869 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2020-06-22 05:11:24,869 INFO L374 BuchiCegarLoop]: Interprodecural is true [2020-06-22 05:11:24,869 INFO L375 BuchiCegarLoop]: Hoare is true [2020-06-22 05:11:24,869 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-06-22 05:11:24,870 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-06-22 05:11:24,870 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-06-22 05:11:24,870 INFO L379 BuchiCegarLoop]: Difference is false [2020-06-22 05:11:24,870 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-06-22 05:11:24,870 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-06-22 05:11:24,874 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states. [2020-06-22 05:11:24,894 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-06-22 05:11:24,894 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-06-22 05:11:24,895 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-06-22 05:11:24,902 INFO L867 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-06-22 05:11:24,902 INFO L868 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-06-22 05:11:24,902 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2020-06-22 05:11:24,902 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states. [2020-06-22 05:11:24,904 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-06-22 05:11:24,904 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-06-22 05:11:24,904 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-06-22 05:11:24,904 INFO L867 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-06-22 05:11:24,905 INFO L868 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-06-22 05:11:24,910 INFO L794 eck$LassoCheckResult]: Stem: 3#ULTIMATE.startENTRYtrue [65] ULTIMATE.startENTRY-->L23: Formula: (<= 0 v_ULTIMATE.start_main_~x~0_8) InVars {} OutVars{ULTIMATE.start_main_#t~nondet4=|v_ULTIMATE.start_main_#t~nondet4_6|, ULTIMATE.start_main_#res=|v_ULTIMATE.start_main_#res_6|, ULTIMATE.start_main_#t~nondet3=|v_ULTIMATE.start_main_#t~nondet3_6|, ULTIMATE.start_main_~y~0=v_ULTIMATE.start_main_~y~0_6, ULTIMATE.start_main_#t~ret5=|v_ULTIMATE.start_main_#t~ret5_6|, ULTIMATE.start_main_~r~0=v_ULTIMATE.start_main_~r~0_3, ULTIMATE.start_main_~x~0=v_ULTIMATE.start_main_~x~0_8} AuxVars[] AssignedVars[ULTIMATE.start_main_#t~nondet4, ULTIMATE.start_main_#res, ULTIMATE.start_main_#t~nondet3, ULTIMATE.start_main_~y~0, ULTIMATE.start_main_#t~ret5, ULTIMATE.start_main_~r~0, ULTIMATE.start_main_~x~0] 5#L23true [49] L23-->AckENTRY: Formula: (and (= |v_Ack_#in~mInParam_4| v_ULTIMATE.start_main_~x~0_7) (= |v_Ack_#in~nInParam_4| v_ULTIMATE.start_main_~y~0_5)) InVars {ULTIMATE.start_main_~y~0=v_ULTIMATE.start_main_~y~0_5, ULTIMATE.start_main_~x~0=v_ULTIMATE.start_main_~x~0_7} OutVars{Ack_#in~n=|v_Ack_#in~nInParam_4|, Ack_#in~m=|v_Ack_#in~mInParam_4|} AuxVars[] AssignedVars[Ack_#in~n, Ack_#in~m]< 13#AckENTRYtrue [2020-06-22 05:11:24,910 INFO L796 eck$LassoCheckResult]: Loop: 13#AckENTRYtrue [52] AckENTRY-->L12: Formula: (and (= v_Ack_~n_1 |v_Ack_#in~n_1|) (= v_Ack_~m_1 |v_Ack_#in~m_1|)) InVars {Ack_#in~n=|v_Ack_#in~n_1|, Ack_#in~m=|v_Ack_#in~m_1|} OutVars{Ack_#in~n=|v_Ack_#in~n_1|, Ack_#in~m=|v_Ack_#in~m_1|, Ack_~m=v_Ack_~m_1, Ack_~n=v_Ack_~n_1} AuxVars[] AssignedVars[Ack_~m, Ack_~n] 6#L12true [60] L12-->L13: Formula: (< 0 v_Ack_~m_3) InVars {Ack_~m=v_Ack_~m_3} OutVars{Ack_~m=v_Ack_~m_3} AuxVars[] AssignedVars[] 11#L13true [62] L13-->L14: Formula: (< 0 v_Ack_~n_4) InVars {Ack_~n=v_Ack_~n_4} OutVars{Ack_~n=v_Ack_~n_4} AuxVars[] AssignedVars[] 4#L14true [35] L14-->AckENTRY: Formula: (and (= |v_Ack_#in~nInParam_2| (+ v_Ack_~n_6 (- 1))) (= |v_Ack_#in~mInParam_2| v_Ack_~m_8)) InVars {Ack_~m=v_Ack_~m_8, Ack_~n=v_Ack_~n_6} OutVars{Ack_#in~n=|v_Ack_#in~nInParam_2|, Ack_#in~m=|v_Ack_#in~mInParam_2|} AuxVars[] AssignedVars[Ack_#in~n, Ack_#in~m]< 13#AckENTRYtrue [2020-06-22 05:11:24,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 05:11:24,916 INFO L82 PathProgramCache]: Analyzing trace with hash 3025, now seen corresponding path program 1 times [2020-06-22 05:11:24,918 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 05:11:24,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 05:11:24,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:24,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 05:11:24,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 05:11:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 05:11:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 05:11:24,992 INFO L82 PathProgramCache]: Analyzing trace with hash 2532270, now seen corresponding path program 1 times [2020-06-22 05:11:24,992 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 05:11:24,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 05:11:24,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:24,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 05:11:24,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 05:11:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 05:11:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 05:11:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1499707522, now seen corresponding path program 1 times [2020-06-22 05:11:25,006 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 05:11:25,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 05:11:25,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:25,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 05:11:25,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 05:11:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 05:11:25,125 INFO L216 LassoAnalysis]: Preferences: [2020-06-22 05:11:25,126 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2020-06-22 05:11:25,126 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-06-22 05:11:25,126 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2020-06-22 05:11:25,126 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2020-06-22 05:11:25,127 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:25,127 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2020-06-22 05:11:25,127 INFO L130 ssoRankerPreferences]: Path of dumped script: [2020-06-22 05:11:25,127 INFO L131 ssoRankerPreferences]: Filename of dumped script: theBenchmark.c_BEv2_Iteration1_Loop [2020-06-22 05:11:25,127 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2020-06-22 05:11:25,128 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2020-06-22 05:11:25,145 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,161 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,163 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,166 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,169 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,175 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,178 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,263 INFO L300 LassoAnalysis]: Preprocessing complete. [2020-06-22 05:11:25,264 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-06-22 05:11:25,271 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:25,271 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:25,281 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:25,281 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#res=0} Honda state: {Ack_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:25,311 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:25,311 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:25,339 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:25,339 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~m=1} Honda state: {Ack_#in~m=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:25,345 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:25,346 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:25,349 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:25,350 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~m=0} Honda state: {Ack_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:25,378 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:25,378 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:25,383 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:25,383 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret2=0} Honda state: {Ack_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:25,412 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:25,412 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:25,416 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:25,416 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~n=0} Honda state: {Ack_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:25,444 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:25,444 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:25,448 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:25,448 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret1=0} Honda state: {Ack_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:25,476 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:25,476 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:25,480 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:25,480 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret0=0} Honda state: {Ack_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:25,508 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:25,508 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:25,539 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-06-22 05:11:25,539 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:25,570 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-06-22 05:11:25,574 INFO L216 LassoAnalysis]: Preferences: [2020-06-22 05:11:25,574 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2020-06-22 05:11:25,574 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-06-22 05:11:25,574 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2020-06-22 05:11:25,574 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2020-06-22 05:11:25,574 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-06-22 05:11:25,574 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2020-06-22 05:11:25,575 INFO L130 ssoRankerPreferences]: Path of dumped script: [2020-06-22 05:11:25,575 INFO L131 ssoRankerPreferences]: Filename of dumped script: theBenchmark.c_BEv2_Iteration1_Loop [2020-06-22 05:11:25,575 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2020-06-22 05:11:25,575 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2020-06-22 05:11:25,577 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,580 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,583 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,603 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,606 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:25,693 INFO L300 LassoAnalysis]: Preprocessing complete. [2020-06-22 05:11:25,699 INFO L497 LassoAnalysis]: Using template 'affine'. [2020-06-22 05:11:25,701 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-06-22 05:11:25,702 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2020-06-22 05:11:25,702 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-06-22 05:11:25,703 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2020-06-22 05:11:25,703 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2020-06-22 05:11:25,703 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2020-06-22 05:11:25,705 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-06-22 05:11:25,706 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-06-22 05:11:25,710 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2020-06-22 05:11:25,710 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-06-22 05:11:25,711 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2020-06-22 05:11:25,711 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-06-22 05:11:25,712 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2020-06-22 05:11:25,712 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2020-06-22 05:11:25,712 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2020-06-22 05:11:25,712 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-06-22 05:11:25,713 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-06-22 05:11:25,714 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2020-06-22 05:11:25,715 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-06-22 05:11:25,715 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2020-06-22 05:11:25,715 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-06-22 05:11:25,716 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2020-06-22 05:11:25,716 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2020-06-22 05:11:25,716 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2020-06-22 05:11:25,717 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-06-22 05:11:25,717 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-06-22 05:11:25,722 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2020-06-22 05:11:25,722 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-06-22 05:11:25,723 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2020-06-22 05:11:25,723 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-06-22 05:11:25,723 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2020-06-22 05:11:25,724 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2020-06-22 05:11:25,724 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2020-06-22 05:11:25,724 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-06-22 05:11:25,724 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-06-22 05:11:25,726 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2020-06-22 05:11:25,726 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-06-22 05:11:25,727 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2020-06-22 05:11:25,727 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-06-22 05:11:25,727 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2020-06-22 05:11:25,727 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2020-06-22 05:11:25,727 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2020-06-22 05:11:25,728 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-06-22 05:11:25,728 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-06-22 05:11:25,730 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2020-06-22 05:11:25,730 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-06-22 05:11:25,731 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2020-06-22 05:11:25,731 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-06-22 05:11:25,731 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2020-06-22 05:11:25,731 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2020-06-22 05:11:25,731 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2020-06-22 05:11:25,732 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-06-22 05:11:25,732 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-06-22 05:11:25,733 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2020-06-22 05:11:25,734 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-06-22 05:11:25,734 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2020-06-22 05:11:25,734 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-06-22 05:11:25,735 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2020-06-22 05:11:25,735 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2020-06-22 05:11:25,735 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2020-06-22 05:11:25,735 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-06-22 05:11:25,736 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-06-22 05:11:25,737 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2020-06-22 05:11:25,737 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-06-22 05:11:25,738 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2020-06-22 05:11:25,738 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-06-22 05:11:25,738 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2020-06-22 05:11:25,738 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2020-06-22 05:11:25,738 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2020-06-22 05:11:25,739 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-06-22 05:11:25,739 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-06-22 05:11:25,744 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-06-22 05:11:25,749 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-06-22 05:11:25,749 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2020-06-22 05:11:25,751 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-06-22 05:11:25,751 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-06-22 05:11:25,751 INFO L518 LassoAnalysis]: Proved termination. [2020-06-22 05:11:25,752 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(Ack_#in~n) = 1*Ack_#in~n Supporting invariants [] [2020-06-22 05:11:25,753 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-06-22 05:11:25,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 05:11:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 05:11:25,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2020-06-22 05:11:25,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2020-06-22 05:11:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 05:11:25,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2020-06-22 05:11:25,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2020-06-22 05:11:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 05:11:25,877 INFO L98 LoopCannibalizer]: 3 predicates before loop cannibalization 3 predicates after loop cannibalization [2020-06-22 05:11:25,882 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-06-22 05:11:25,883 INFO L69 BuchiDifferenceNCSB]: Start buchiDifferenceNCSB. First operand 12 states. Second operand 4 states. [2020-06-22 05:11:26,011 INFO L73 BuchiDifferenceNCSB]: Finished buchiDifferenceNCSB. First operand 12 states.. Second operand 4 states. Result 64 states and 105 transitions. Complement of second has 24 states. [2020-06-22 05:11:26,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 4 non-accepting loop states 1 accepting loop states [2020-06-22 05:11:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-06-22 05:11:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 31 transitions. [2020-06-22 05:11:26,018 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 31 transitions. Stem has 2 letters. Loop has 4 letters. [2020-06-22 05:11:26,020 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-06-22 05:11:26,020 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 31 transitions. Stem has 6 letters. Loop has 4 letters. [2020-06-22 05:11:26,022 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-06-22 05:11:26,022 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 31 transitions. Stem has 2 letters. Loop has 8 letters. [2020-06-22 05:11:26,023 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-06-22 05:11:26,030 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 64 states and 105 transitions. [2020-06-22 05:11:26,037 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2020-06-22 05:11:26,048 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 64 states to 47 states and 86 transitions. [2020-06-22 05:11:26,049 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 31 [2020-06-22 05:11:26,050 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33 [2020-06-22 05:11:26,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 86 transitions. [2020-06-22 05:11:26,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-06-22 05:11:26,051 INFO L706 BuchiCegarLoop]: Abstraction has 47 states and 86 transitions. [2020-06-22 05:11:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 86 transitions. [2020-06-22 05:11:26,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2020-06-22 05:11:26,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-06-22 05:11:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 59 transitions. [2020-06-22 05:11:26,092 INFO L729 BuchiCegarLoop]: Abstraction has 35 states and 59 transitions. [2020-06-22 05:11:26,092 INFO L609 BuchiCegarLoop]: Abstraction has 35 states and 59 transitions. [2020-06-22 05:11:26,092 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2020-06-22 05:11:26,092 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 35 states and 59 transitions. [2020-06-22 05:11:26,095 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2020-06-22 05:11:26,095 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-06-22 05:11:26,096 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-06-22 05:11:26,097 INFO L867 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-06-22 05:11:26,097 INFO L868 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-06-22 05:11:26,098 INFO L794 eck$LassoCheckResult]: Stem: 151#ULTIMATE.startENTRY [65] ULTIMATE.startENTRY-->L23: Formula: (<= 0 v_ULTIMATE.start_main_~x~0_8) InVars {} OutVars{ULTIMATE.start_main_#t~nondet4=|v_ULTIMATE.start_main_#t~nondet4_6|, ULTIMATE.start_main_#res=|v_ULTIMATE.start_main_#res_6|, ULTIMATE.start_main_#t~nondet3=|v_ULTIMATE.start_main_#t~nondet3_6|, ULTIMATE.start_main_~y~0=v_ULTIMATE.start_main_~y~0_6, ULTIMATE.start_main_#t~ret5=|v_ULTIMATE.start_main_#t~ret5_6|, ULTIMATE.start_main_~r~0=v_ULTIMATE.start_main_~r~0_3, ULTIMATE.start_main_~x~0=v_ULTIMATE.start_main_~x~0_8} AuxVars[] AssignedVars[ULTIMATE.start_main_#t~nondet4, ULTIMATE.start_main_#res, ULTIMATE.start_main_#t~nondet3, ULTIMATE.start_main_~y~0, ULTIMATE.start_main_#t~ret5, ULTIMATE.start_main_~r~0, ULTIMATE.start_main_~x~0] 148#L23 [49] L23-->AckENTRY: Formula: (and (= |v_Ack_#in~mInParam_4| v_ULTIMATE.start_main_~x~0_7) (= |v_Ack_#in~nInParam_4| v_ULTIMATE.start_main_~y~0_5)) InVars {ULTIMATE.start_main_~y~0=v_ULTIMATE.start_main_~y~0_5, ULTIMATE.start_main_~x~0=v_ULTIMATE.start_main_~x~0_7} OutVars{Ack_#in~n=|v_Ack_#in~nInParam_4|, Ack_#in~m=|v_Ack_#in~mInParam_4|} AuxVars[] AssignedVars[Ack_#in~n, Ack_#in~m]< 152#AckENTRY [52] AckENTRY-->L12: Formula: (and (= v_Ack_~n_1 |v_Ack_#in~n_1|) (= v_Ack_~m_1 |v_Ack_#in~m_1|)) InVars {Ack_#in~n=|v_Ack_#in~n_1|, Ack_#in~m=|v_Ack_#in~m_1|} OutVars{Ack_#in~n=|v_Ack_#in~n_1|, Ack_#in~m=|v_Ack_#in~m_1|, Ack_~m=v_Ack_~m_1, Ack_~n=v_Ack_~n_1} AuxVars[] AssignedVars[Ack_~m, Ack_~n] 174#L12 [61] L12-->L13: Formula: (> 0 v_Ack_~m_3) InVars {Ack_~m=v_Ack_~m_3} OutVars{Ack_~m=v_Ack_~m_3} AuxVars[] AssignedVars[] 173#L13 [63] L13-->L14: Formula: (> 0 v_Ack_~n_4) InVars {Ack_~n=v_Ack_~n_4} OutVars{Ack_~n=v_Ack_~n_4} AuxVars[] AssignedVars[] 144#L14 [2020-06-22 05:11:26,098 INFO L796 eck$LassoCheckResult]: Loop: 144#L14 [35] L14-->AckENTRY: Formula: (and (= |v_Ack_#in~nInParam_2| (+ v_Ack_~n_6 (- 1))) (= |v_Ack_#in~mInParam_2| v_Ack_~m_8)) InVars {Ack_~m=v_Ack_~m_8, Ack_~n=v_Ack_~n_6} OutVars{Ack_#in~n=|v_Ack_#in~nInParam_2|, Ack_#in~m=|v_Ack_#in~mInParam_2|} AuxVars[] AssignedVars[Ack_#in~n, Ack_#in~m]< 147#AckENTRY [52] AckENTRY-->L12: Formula: (and (= v_Ack_~n_1 |v_Ack_#in~n_1|) (= v_Ack_~m_1 |v_Ack_#in~m_1|)) InVars {Ack_#in~n=|v_Ack_#in~n_1|, Ack_#in~m=|v_Ack_#in~m_1|} OutVars{Ack_#in~n=|v_Ack_#in~n_1|, Ack_#in~m=|v_Ack_#in~m_1|, Ack_~m=v_Ack_~m_1, Ack_~n=v_Ack_~n_1} AuxVars[] AssignedVars[Ack_~m, Ack_~n] 168#L12 [60] L12-->L13: Formula: (< 0 v_Ack_~m_3) InVars {Ack_~m=v_Ack_~m_3} OutVars{Ack_~m=v_Ack_~m_3} AuxVars[] AssignedVars[] 163#L13 [63] L13-->L14: Formula: (> 0 v_Ack_~n_4) InVars {Ack_~n=v_Ack_~n_4} OutVars{Ack_~n=v_Ack_~n_4} AuxVars[] AssignedVars[] 144#L14 [2020-06-22 05:11:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 05:11:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash 90169701, now seen corresponding path program 1 times [2020-06-22 05:11:26,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 05:11:26,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 05:11:26,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:26,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 05:11:26,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 05:11:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 05:11:26,155 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 05:11:26,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-06-22 05:11:26,159 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-06-22 05:11:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 05:11:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash 2018101, now seen corresponding path program 1 times [2020-06-22 05:11:26,160 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 05:11:26,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 05:11:26,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:26,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 05:11:26,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 05:11:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 05:11:26,265 INFO L216 LassoAnalysis]: Preferences: [2020-06-22 05:11:26,265 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2020-06-22 05:11:26,265 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-06-22 05:11:26,265 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2020-06-22 05:11:26,265 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2020-06-22 05:11:26,266 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:26,266 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2020-06-22 05:11:26,266 INFO L130 ssoRankerPreferences]: Path of dumped script: [2020-06-22 05:11:26,266 INFO L131 ssoRankerPreferences]: Filename of dumped script: theBenchmark.c_BEv2_Iteration2_Loop [2020-06-22 05:11:26,266 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2020-06-22 05:11:26,266 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2020-06-22 05:11:26,268 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:26,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:26,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:26,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:26,281 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:26,291 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:26,379 INFO L300 LassoAnalysis]: Preprocessing complete. [2020-06-22 05:11:26,379 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:26,387 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:26,387 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:26,392 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:26,392 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret1=0} Honda state: {Ack_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:26,423 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:26,424 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:26,427 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:26,428 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#res=0} Honda state: {Ack_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:26,457 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:26,458 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:26,461 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:26,461 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret0=0} Honda state: {Ack_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:26,491 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:26,491 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:26,495 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:26,496 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret2=0} Honda state: {Ack_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:26,524 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:26,524 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:26,558 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-06-22 05:11:26,558 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:27,060 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:27,060 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~n=1, Ack_~n=-7} Honda state: {Ack_#in~n=1, Ack_~n=-7} Generalized eigenvectors: [{Ack_#in~n=-5, Ack_~n=-1}, {Ack_#in~n=4, Ack_~n=0}, {Ack_#in~n=-8, Ack_~n=0}] Lambdas: [1, 2, 0] Nus: [1, 1] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:27,090 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:27,090 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:27,097 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:27,097 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~m=4, Ack_#in~m=4} Honda state: {Ack_~m=4, Ack_#in~m=4} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2020-06-22 05:11:27,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-06-22 05:11:27,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-06-22 05:11:27,124 INFO L87 Difference]: Start difference. First operand 35 states and 59 transitions. cyclomatic complexity: 27 Second operand 5 states. [2020-06-22 05:11:27,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 05:11:27,235 INFO L93 Difference]: Finished difference Result 53 states and 88 transitions. [2020-06-22 05:11:27,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-06-22 05:11:27,238 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 88 transitions. [2020-06-22 05:11:27,242 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-06-22 05:11:27,245 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 53 states and 88 transitions. [2020-06-22 05:11:27,245 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2020-06-22 05:11:27,245 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 44 [2020-06-22 05:11:27,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 88 transitions. [2020-06-22 05:11:27,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-06-22 05:11:27,245 INFO L706 BuchiCegarLoop]: Abstraction has 53 states and 88 transitions. [2020-06-22 05:11:27,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states and 88 transitions. [2020-06-22 05:11:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-06-22 05:11:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-06-22 05:11:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 74 transitions. [2020-06-22 05:11:27,253 INFO L729 BuchiCegarLoop]: Abstraction has 47 states and 74 transitions. [2020-06-22 05:11:27,254 INFO L609 BuchiCegarLoop]: Abstraction has 47 states and 74 transitions. [2020-06-22 05:11:27,254 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2020-06-22 05:11:27,254 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 47 states and 74 transitions. [2020-06-22 05:11:27,255 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 18 [2020-06-22 05:11:27,256 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-06-22 05:11:27,256 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-06-22 05:11:27,256 INFO L867 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-06-22 05:11:27,256 INFO L868 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-06-22 05:11:27,256 INFO L794 eck$LassoCheckResult]: Stem: 242#ULTIMATE.startENTRY [65] ULTIMATE.startENTRY-->L23: Formula: (<= 0 v_ULTIMATE.start_main_~x~0_8) InVars {} OutVars{ULTIMATE.start_main_#t~nondet4=|v_ULTIMATE.start_main_#t~nondet4_6|, ULTIMATE.start_main_#res=|v_ULTIMATE.start_main_#res_6|, ULTIMATE.start_main_#t~nondet3=|v_ULTIMATE.start_main_#t~nondet3_6|, ULTIMATE.start_main_~y~0=v_ULTIMATE.start_main_~y~0_6, ULTIMATE.start_main_#t~ret5=|v_ULTIMATE.start_main_#t~ret5_6|, ULTIMATE.start_main_~r~0=v_ULTIMATE.start_main_~r~0_3, ULTIMATE.start_main_~x~0=v_ULTIMATE.start_main_~x~0_8} AuxVars[] AssignedVars[ULTIMATE.start_main_#t~nondet4, ULTIMATE.start_main_#res, ULTIMATE.start_main_#t~nondet3, ULTIMATE.start_main_~y~0, ULTIMATE.start_main_#t~ret5, ULTIMATE.start_main_~r~0, ULTIMATE.start_main_~x~0] 243#L23 [49] L23-->AckENTRY: Formula: (and (= |v_Ack_#in~mInParam_4| v_ULTIMATE.start_main_~x~0_7) (= |v_Ack_#in~nInParam_4| v_ULTIMATE.start_main_~y~0_5)) InVars {ULTIMATE.start_main_~y~0=v_ULTIMATE.start_main_~y~0_5, ULTIMATE.start_main_~x~0=v_ULTIMATE.start_main_~x~0_7} OutVars{Ack_#in~n=|v_Ack_#in~nInParam_4|, Ack_#in~m=|v_Ack_#in~mInParam_4|} AuxVars[] AssignedVars[Ack_#in~n, Ack_#in~m]< 257#AckENTRY [52] AckENTRY-->L12: Formula: (and (= v_Ack_~n_1 |v_Ack_#in~n_1|) (= v_Ack_~m_1 |v_Ack_#in~m_1|)) InVars {Ack_#in~n=|v_Ack_#in~n_1|, Ack_#in~m=|v_Ack_#in~m_1|} OutVars{Ack_#in~n=|v_Ack_#in~n_1|, Ack_#in~m=|v_Ack_#in~m_1|, Ack_~m=v_Ack_~m_1, Ack_~n=v_Ack_~n_1} AuxVars[] AssignedVars[Ack_~m, Ack_~n] 272#L12 [60] L12-->L13: Formula: (< 0 v_Ack_~m_3) InVars {Ack_~m=v_Ack_~m_3} OutVars{Ack_~m=v_Ack_~m_3} AuxVars[] AssignedVars[] 279#L13 [63] L13-->L14: Formula: (> 0 v_Ack_~n_4) InVars {Ack_~n=v_Ack_~n_4} OutVars{Ack_~n=v_Ack_~n_4} AuxVars[] AssignedVars[] 266#L14 [2020-06-22 05:11:27,257 INFO L796 eck$LassoCheckResult]: Loop: 266#L14 [35] L14-->AckENTRY: Formula: (and (= |v_Ack_#in~nInParam_2| (+ v_Ack_~n_6 (- 1))) (= |v_Ack_#in~mInParam_2| v_Ack_~m_8)) InVars {Ack_~m=v_Ack_~m_8, Ack_~n=v_Ack_~n_6} OutVars{Ack_#in~n=|v_Ack_#in~nInParam_2|, Ack_#in~m=|v_Ack_#in~mInParam_2|} AuxVars[] AssignedVars[Ack_#in~n, Ack_#in~m]< 283#AckENTRY [52] AckENTRY-->L12: Formula: (and (= v_Ack_~n_1 |v_Ack_#in~n_1|) (= v_Ack_~m_1 |v_Ack_#in~m_1|)) InVars {Ack_#in~n=|v_Ack_#in~n_1|, Ack_#in~m=|v_Ack_#in~m_1|} OutVars{Ack_#in~n=|v_Ack_#in~n_1|, Ack_#in~m=|v_Ack_#in~m_1|, Ack_~m=v_Ack_~m_1, Ack_~n=v_Ack_~n_1} AuxVars[] AssignedVars[Ack_~m, Ack_~n] 287#L12 [60] L12-->L13: Formula: (< 0 v_Ack_~m_3) InVars {Ack_~m=v_Ack_~m_3} OutVars{Ack_~m=v_Ack_~m_3} AuxVars[] AssignedVars[] 285#L13 [63] L13-->L14: Formula: (> 0 v_Ack_~n_4) InVars {Ack_~n=v_Ack_~n_4} OutVars{Ack_~n=v_Ack_~n_4} AuxVars[] AssignedVars[] 266#L14 [2020-06-22 05:11:27,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 05:11:27,257 INFO L82 PathProgramCache]: Analyzing trace with hash 90169670, now seen corresponding path program 1 times [2020-06-22 05:11:27,257 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 05:11:27,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 05:11:27,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:27,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 05:11:27,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 05:11:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 05:11:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 05:11:27,267 INFO L82 PathProgramCache]: Analyzing trace with hash 2018101, now seen corresponding path program 2 times [2020-06-22 05:11:27,267 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 05:11:27,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 05:11:27,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:27,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 05:11:27,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 05:11:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 05:11:27,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 05:11:27,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1535999494, now seen corresponding path program 1 times [2020-06-22 05:11:27,275 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 05:11:27,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 05:11:27,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:27,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2020-06-22 05:11:27,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 05:11:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 05:11:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 05:11:27,366 INFO L216 LassoAnalysis]: Preferences: [2020-06-22 05:11:27,366 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2020-06-22 05:11:27,366 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-06-22 05:11:27,367 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2020-06-22 05:11:27,367 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2020-06-22 05:11:27,367 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:27,367 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2020-06-22 05:11:27,367 INFO L130 ssoRankerPreferences]: Path of dumped script: [2020-06-22 05:11:27,367 INFO L131 ssoRankerPreferences]: Filename of dumped script: theBenchmark.c_BEv2_Iteration3_Loop [2020-06-22 05:11:27,367 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2020-06-22 05:11:27,367 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2020-06-22 05:11:27,369 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:27,380 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:27,388 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:27,391 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:27,393 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:27,395 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:27,495 INFO L300 LassoAnalysis]: Preprocessing complete. [2020-06-22 05:11:27,495 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:27,501 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:27,501 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:27,507 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:27,507 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_~m=4, Ack_#in~m=4} Honda state: {Ack_~m=4, Ack_#in~m=4} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:27,537 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:27,537 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:27,572 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-06-22 05:11:27,573 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:28,413 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:28,413 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~n=-5, Ack_~n=-7} Honda state: {Ack_#in~n=-5, Ack_~n=-7} Generalized eigenvectors: [{Ack_#in~n=-5, Ack_~n=-1}, {Ack_#in~n=4, Ack_~n=0}, {Ack_#in~n=-2, Ack_~n=0}] Lambdas: [1, 0, 0] Nus: [1, 0] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:28,462 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:28,463 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:28,466 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:28,467 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#res=0} Honda state: {Ack_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:28,495 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:28,495 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:28,499 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:28,499 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret2=0} Honda state: {Ack_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:28,526 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:28,526 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:28,530 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:28,530 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret1=0} Honda state: {Ack_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:28,557 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:28,557 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:28,561 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:28,561 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret0=0} Honda state: {Ack_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2020-06-22 05:11:28,649 INFO L216 LassoAnalysis]: Preferences: [2020-06-22 05:11:28,649 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2020-06-22 05:11:28,649 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-06-22 05:11:28,649 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2020-06-22 05:11:28,650 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2020-06-22 05:11:28,650 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:28,650 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2020-06-22 05:11:28,650 INFO L130 ssoRankerPreferences]: Path of dumped script: [2020-06-22 05:11:28,650 INFO L131 ssoRankerPreferences]: Filename of dumped script: theBenchmark.c_BEv2_Iteration3_Lasso [2020-06-22 05:11:28,650 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2020-06-22 05:11:28,650 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2020-06-22 05:11:28,652 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:28,656 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:28,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:28,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:28,670 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:28,679 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:28,681 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:28,682 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:28,684 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:28,686 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:28,687 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:28,689 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:28,691 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:28,692 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-06-22 05:11:28,767 INFO L300 LassoAnalysis]: Preprocessing complete. [2020-06-22 05:11:28,767 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:28,772 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:28,772 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:28,776 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:28,776 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~ret5=0} Honda state: {ULTIMATE.start_main_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:28,803 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:28,804 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:28,837 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-06-22 05:11:28,838 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:29,024 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:29,024 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~n=0, Ack_~n=0} Honda state: {Ack_#in~n=-8, Ack_~n=-8} Generalized eigenvectors: [{Ack_#in~n=0, Ack_~n=0}, {Ack_#in~n=7, Ack_~n=-1}, {Ack_#in~n=-8, Ack_~n=0}] Lambdas: [0, 1, 0] Nus: [0, 1] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:29,052 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:29,053 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:29,056 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:29,056 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~y~0=0} Honda state: {ULTIMATE.start_main_~y~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:29,083 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:29,083 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:29,086 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:29,087 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~r~0=0} Honda state: {ULTIMATE.start_main_~r~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-06-22 05:11:29,113 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:29,113 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:29,119 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:29,119 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#in~m=0, Ack_~m=0} Honda state: {Ack_#in~m=4, Ack_~m=4} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:29,145 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:29,146 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:29,149 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:29,149 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:29,176 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:29,176 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:29,180 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:29,180 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#res=0} Honda state: {Ack_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:29,206 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:29,207 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:29,210 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:29,210 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret2=0} Honda state: {Ack_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:29,238 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:29,238 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:29,242 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:29,242 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret0=0} Honda state: {Ack_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:29,269 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:29,269 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:29,273 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:29,273 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {Ack_#t~ret1=0} Honda state: {Ack_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:29,299 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:29,299 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:29,303 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:29,303 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet4=0} Honda state: {ULTIMATE.start_main_#t~nondet4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:29,329 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:29,330 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:29,333 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:29,333 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0=0} Honda state: {ULTIMATE.start_main_~x~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:29,360 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:29,360 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:29,363 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:29,363 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet3=0} Honda state: {ULTIMATE.start_main_#t~nondet3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 05:11:29,389 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-06-22 05:11:29,390 INFO L163 nArgumentSynthesizer]: Using integer mode. [2020-06-22 05:11:29,393 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2020-06-22 05:11:29,393 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_#t~ret6=0} Honda state: {ULTIMATE.start_#t~ret6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2020-06-22 05:11:29,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.06 05:11:29 BasicIcfg [2020-06-22 05:11:29,439 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-06-22 05:11:29,439 INFO L168 Benchmark]: Toolchain (without parser) took 5396.96 ms. Allocated memory was 649.6 MB in the beginning and 751.3 MB in the end (delta: 101.7 MB). Free memory was 564.1 MB in the beginning and 566.8 MB in the end (delta: -2.7 MB). Peak memory consumption was 225.4 MB. Max. memory is 50.3 GB. [2020-06-22 05:11:29,441 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 649.6 MB. Free memory is still 585.7 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-06-22 05:11:29,441 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.00 ms. Allocated memory was 649.6 MB in the beginning and 675.3 MB in the end (delta: 25.7 MB). Free memory was 564.1 MB in the beginning and 641.7 MB in the end (delta: -77.5 MB). Peak memory consumption was 30.3 MB. Max. memory is 50.3 GB. [2020-06-22 05:11:29,442 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.54 ms. Allocated memory is still 675.3 MB. Free memory was 641.7 MB in the beginning and 638.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 50.3 GB. [2020-06-22 05:11:29,442 INFO L168 Benchmark]: Boogie Preprocessor took 16.75 ms. Allocated memory is still 675.3 MB. Free memory was 638.6 MB in the beginning and 637.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. [2020-06-22 05:11:29,443 INFO L168 Benchmark]: RCFGBuilder took 209.08 ms. Allocated memory is still 675.3 MB. Free memory was 637.2 MB in the beginning and 622.9 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 50.3 GB. [2020-06-22 05:11:29,443 INFO L168 Benchmark]: BlockEncodingV2 took 77.98 ms. Allocated memory is still 675.3 MB. Free memory was 622.9 MB in the beginning and 617.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 50.3 GB. [2020-06-22 05:11:29,444 INFO L168 Benchmark]: TraceAbstraction took 171.11 ms. Allocated memory is still 675.3 MB. Free memory was 617.5 MB in the beginning and 606.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 50.3 GB. [2020-06-22 05:11:29,444 INFO L168 Benchmark]: BuchiAutomizer took 4607.34 ms. Allocated memory was 675.3 MB in the beginning and 751.3 MB in the end (delta: 76.0 MB). Free memory was 605.3 MB in the beginning and 566.8 MB in the end (delta: 38.5 MB). Peak memory consumption was 240.9 MB. Max. memory is 50.3 GB. [2020-06-22 05:11:29,448 INFO L337 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 17 locations, 22 edges - StatisticsResult: Encoded RCFG 12 locations, 18 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 649.6 MB. Free memory is still 585.7 MB. There was no memory consumed. Max. memory is 50.3 GB. * CACSL2BoogieTranslator took 276.00 ms. Allocated memory was 649.6 MB in the beginning and 675.3 MB in the end (delta: 25.7 MB). Free memory was 564.1 MB in the beginning and 641.7 MB in the end (delta: -77.5 MB). Peak memory consumption was 30.3 MB. Max. memory is 50.3 GB. * Boogie Procedure Inliner took 33.54 ms. Allocated memory is still 675.3 MB. Free memory was 641.7 MB in the beginning and 638.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 50.3 GB. * Boogie Preprocessor took 16.75 ms. Allocated memory is still 675.3 MB. Free memory was 638.6 MB in the beginning and 637.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. * RCFGBuilder took 209.08 ms. Allocated memory is still 675.3 MB. Free memory was 637.2 MB in the beginning and 622.9 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 50.3 GB. * BlockEncodingV2 took 77.98 ms. Allocated memory is still 675.3 MB. Free memory was 622.9 MB in the beginning and 617.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 50.3 GB. * TraceAbstraction took 171.11 ms. Allocated memory is still 675.3 MB. Free memory was 617.5 MB in the beginning and 606.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 50.3 GB. * BuchiAutomizer took 4607.34 ms. Allocated memory was 675.3 MB in the beginning and 751.3 MB in the end (delta: 76.0 MB). Free memory was 605.3 MB in the beginning and 566.8 MB in the end (delta: 38.5 MB). Peak memory consumption was 240.9 MB. Max. memory is 50.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - AllSpecificationsHoldResult: All specifications hold We were not able to verify any specifiation because the program does not contain any specification. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 12 locations, 0 error locations. SAFE Result, 0.1s OverallTime, 0 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 17 PreInvPairs, 17 NumberOfFragments, 5 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Constructed decomposition of program Your program was decomposed into 2 terminating modules (1 trivial, 0 deterministic, 1 nondeterministic) and one nonterminating remainder module.One nondeterministic module has affine ranking function \old(n) and consists of 6 locations. 1 modules have a trivial ranking function, the largest among these consists of 5 locations. The remainder module has 47 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.5s and 3 iterations. TraceHistogramMax:1. Analysis of lassos took 4.0s. Construction of modules took 0.1s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 18 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 47 states and ocurred in iteration 2. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 37 SDtfs, 53 SDslu, 53 SDs, 0 SdLazy, 77 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN1 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital22 mio100 ax100 hnf100 lsp59 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq169 hnf92 smp100 dnf100 smp100 tf109 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 10ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 30 LassoNonterminationAnalysisSatUnbounded: 3 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.9s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - GeometricNonTerminationArgumentResult [Line: 14]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution {|Ack_#res|=0, |ULTIMATE.start_main_#t~nondet4|=0, |ULTIMATE.start_main_#t~nondet3|=0, ULTIMATE.start_main_~r~0=0, |Ack_#t~ret0|=0, ULTIMATE.start_main_~x~0=0, |ULTIMATE.start_#t~ret6|=0, |Ack_#t~ret2|=0, |Ack_#t~ret1|=0, |ULTIMATE.start_main_#res|=0, ULTIMATE.start_main_~y~0=0, |Ack_#in~n|=0, |Ack_#in~m|=0, |ULTIMATE.start_main_#t~ret5|=0, Ack_~m=0, Ack_~n=0} {\result=0, \result=0, \old(m)=4, \old(n)=-8, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@f0674c8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@651d2ee0=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@41534006=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3cb28131=0, r=0, n=-8, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@72e65866=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@328f914e=0, y=0, m=4} {\result=0, \result=0, \old(m)=4, \old(n)=-9, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@f0674c8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@651d2ee0=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@41534006=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3cb28131=0, r=0, n=-9, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@72e65866=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@328f914e=0, y=0, m=4} {\result=0, \result=0, \old(m)=4, \old(n)=-10, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@f0674c8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@651d2ee0=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@41534006=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3cb28131=0, r=0, n=-10, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@72e65866=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@328f914e=0, y=0, m=4} {\result=0, \result=0, \old(m)=4, \old(n)=-11, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@f0674c8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@651d2ee0=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@41534006=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3cb28131=0, r=0, n=-11, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@72e65866=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@328f914e=0, y=0, m=4} {\result=0, \result=0, \old(m)=4, \old(n)=-12, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@f0674c8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@651d2ee0=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@41534006=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3cb28131=0, r=0, n=-12, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@72e65866=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@328f914e=0, y=0, m=4} - StatisticsResult: NonterminationArgumentStatistics Unbounded Execution 2GEVs Lambdas: [0, 1, 0] Mus: [0, 1] - NonterminatingLassoResult [Line: 14]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L18] int x = __VERIFIER_nondet_int(); [L19] int y = __VERIFIER_nondet_int(); [L20] COND FALSE !(x < 0) [L23] CALL Ack(x, y) [L12] COND FALSE !(m == 0) [L13] COND FALSE !(n == 0) Loop: [L14] CALL Ack(m, n-1) [L12] COND FALSE !(m == 0) [L13] COND FALSE !(n == 0) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! !SESSION 2020-06-22 05:11:20.787 ----------------------------------------------- eclipse.buildId=unknown java.version=1.8.0_242 java.vendor=Oracle Corporation BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -tc ./../AutomizerAndBuchiAutomizerCInlineWithBlockEncoding.xml -s ./../termcomp2017.epf -i /export/starexec/sandbox2/benchmark/theBenchmark.c Command-line arguments: -os linux -ws gtk -arch x86_64 -consoleLog -data @user.home/.ultimate -tc ./../AutomizerAndBuchiAutomizerCInlineWithBlockEncoding.xml -s ./../termcomp2017.epf -data /export/starexec/sandbox2/tmp -i /export/starexec/sandbox2/benchmark/theBenchmark.c !ENTRY org.eclipse.core.resources 2 10035 2020-06-22 05:11:29.688 !MESSAGE The workspace will exit with unsaved changes in this session. Received shutdown request... Ultimate: GTK+ Version Check