MAYBE Ultimate: Cannot open display: This is Ultimate 0.1.24-8dc7c08-m [2020-06-22 08:16:10,480 INFO L170 SettingsManager]: Resetting all preferences to default values... [2020-06-22 08:16:10,482 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2020-06-22 08:16:10,493 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-06-22 08:16:10,493 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-06-22 08:16:10,494 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-06-22 08:16:10,495 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-06-22 08:16:10,497 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2020-06-22 08:16:10,498 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-06-22 08:16:10,499 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-06-22 08:16:10,500 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-06-22 08:16:10,500 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-06-22 08:16:10,501 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-06-22 08:16:10,502 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-06-22 08:16:10,503 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-06-22 08:16:10,503 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-06-22 08:16:10,504 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-06-22 08:16:10,506 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-06-22 08:16:10,508 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2020-06-22 08:16:10,509 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-06-22 08:16:10,510 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-06-22 08:16:10,511 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-06-22 08:16:10,513 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-06-22 08:16:10,514 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-06-22 08:16:10,514 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-06-22 08:16:10,515 INFO L174 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-06-22 08:16:10,515 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-06-22 08:16:10,516 INFO L177 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-06-22 08:16:10,516 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-06-22 08:16:10,517 INFO L174 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-06-22 08:16:10,517 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-06-22 08:16:10,518 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2020-06-22 08:16:10,519 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-06-22 08:16:10,519 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2020-06-22 08:16:10,520 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-06-22 08:16:10,520 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-06-22 08:16:10,520 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2020-06-22 08:16:10,521 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2020-06-22 08:16:10,522 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2020-06-22 08:16:10,522 INFO L98 SettingsManager]: Beginning loading settings from /export/starexec/sandbox2/solver/bin/./../termcomp2017.epf [2020-06-22 08:16:10,536 INFO L110 SettingsManager]: Loading preferences was successful [2020-06-22 08:16:10,536 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2020-06-22 08:16:10,537 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-06-22 08:16:10,537 INFO L133 SettingsManager]: * Rewrite not-equals=true [2020-06-22 08:16:10,538 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2020-06-22 08:16:10,538 INFO L133 SettingsManager]: * Minimize states using LBE with the strategy=SINGLE [2020-06-22 08:16:10,538 INFO L133 SettingsManager]: * Use SBE=true [2020-06-22 08:16:10,538 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-06-22 08:16:10,538 INFO L133 SettingsManager]: * Use old map elimination=false [2020-06-22 08:16:10,538 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2020-06-22 08:16:10,539 INFO L133 SettingsManager]: * Buchi interpolant automaton construction strategy=DANDELION [2020-06-22 08:16:10,539 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2020-06-22 08:16:10,539 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-06-22 08:16:10,539 INFO L133 SettingsManager]: * Construct termination proof for TermComp=true [2020-06-22 08:16:10,539 INFO L133 SettingsManager]: * Command for external solver (GNTA synthesis)=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 08:16:10,539 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-06-22 08:16:10,539 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-06-22 08:16:10,540 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2020-06-22 08:16:10,540 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2020-06-22 08:16:10,540 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-06-22 08:16:10,540 INFO L133 SettingsManager]: * How to treat unsigned ints differently from normal ones=IGNORE [2020-06-22 08:16:10,540 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-06-22 08:16:10,540 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-06-22 08:16:10,541 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-06-22 08:16:10,541 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-06-22 08:16:10,541 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-06-22 08:16:10,541 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-06-22 08:16:10,541 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2020-06-22 08:16:10,541 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-06-22 08:16:10,566 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-06-22 08:16:10,579 INFO L259 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-06-22 08:16:10,583 INFO L215 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-06-22 08:16:10,584 INFO L271 PluginConnector]: Initializing CDTParser... [2020-06-22 08:16:10,585 INFO L276 PluginConnector]: CDTParser initialized [2020-06-22 08:16:10,585 INFO L430 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /export/starexec/sandbox2/benchmark/theBenchmark.c [2020-06-22 08:16:10,673 INFO L221 CDTParser]: Created temporary CDT project at /export/starexec/sandbox2/tmp/aa05eb9240e24f3da164fb4d09640ba0/FLAGab543ea54 [2020-06-22 08:16:11,011 INFO L307 CDTParser]: Found 1 translation units. [2020-06-22 08:16:11,012 INFO L161 CDTParser]: Scanning /export/starexec/sandbox2/benchmark/theBenchmark.c [2020-06-22 08:16:11,012 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2020-06-22 08:16:11,019 INFO L355 CDTParser]: About to delete temporary CDT project at /export/starexec/sandbox2/tmp/aa05eb9240e24f3da164fb4d09640ba0/FLAGab543ea54 [2020-06-22 08:16:11,417 INFO L363 CDTParser]: Successfully deleted /export/starexec/sandbox2/tmp/aa05eb9240e24f3da164fb4d09640ba0 [2020-06-22 08:16:11,428 INFO L297 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-06-22 08:16:11,430 INFO L131 ToolchainWalker]: Walking toolchain with 7 elements. [2020-06-22 08:16:11,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-06-22 08:16:11,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-06-22 08:16:11,435 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2020-06-22 08:16:11,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.06 08:16:11" (1/1) ... [2020-06-22 08:16:11,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@345de388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:16:11, skipping insertion in model container [2020-06-22 08:16:11,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.06 08:16:11" (1/1) ... [2020-06-22 08:16:11,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-06-22 08:16:11,467 INFO L176 MainTranslator]: Built tables and reachable declarations [2020-06-22 08:16:11,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-06-22 08:16:11,708 INFO L191 MainTranslator]: Completed pre-run [2020-06-22 08:16:11,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-06-22 08:16:11,744 INFO L195 MainTranslator]: Completed translation [2020-06-22 08:16:11,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:16:11 WrapperNode [2020-06-22 08:16:11,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-06-22 08:16:11,745 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-06-22 08:16:11,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-06-22 08:16:11,746 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2020-06-22 08:16:11,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:16:11" (1/1) ... [2020-06-22 08:16:11,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:16:11" (1/1) ... [2020-06-22 08:16:11,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-06-22 08:16:11,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-06-22 08:16:11,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-06-22 08:16:11,786 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2020-06-22 08:16:11,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:16:11" (1/1) ... [2020-06-22 08:16:11,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:16:11" (1/1) ... [2020-06-22 08:16:11,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:16:11" (1/1) ... [2020-06-22 08:16:11,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:16:11" (1/1) ... [2020-06-22 08:16:11,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:16:11" (1/1) ... [2020-06-22 08:16:11,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:16:11" (1/1) ... [2020-06-22 08:16:11,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:16:11" (1/1) ... [2020-06-22 08:16:11,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-06-22 08:16:11,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-06-22 08:16:11,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-06-22 08:16:11,811 INFO L276 PluginConnector]: RCFGBuilder initialized [2020-06-22 08:16:11,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:16:11" (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 08:16:11,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-06-22 08:16:11,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-06-22 08:16:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-06-22 08:16:11,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-06-22 08:16:11,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-06-22 08:16:11,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-06-22 08:16:12,113 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-06-22 08:16:12,114 INFO L286 CfgBuilder]: Removed 6 assue(true) statements. [2020-06-22 08:16:12,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:16:12 BoogieIcfgContainer [2020-06-22 08:16:12,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-06-22 08:16:12,116 INFO L113 PluginConnector]: ------------------------BlockEncodingV2---------------------------- [2020-06-22 08:16:12,116 INFO L271 PluginConnector]: Initializing BlockEncodingV2... [2020-06-22 08:16:12,118 INFO L276 PluginConnector]: BlockEncodingV2 initialized [2020-06-22 08:16:12,119 INFO L185 PluginConnector]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:16:12" (1/1) ... [2020-06-22 08:16:12,138 INFO L313 BlockEncoder]: Initial Icfg 27 locations, 33 edges [2020-06-22 08:16:12,140 INFO L258 BlockEncoder]: Using Remove infeasible edges [2020-06-22 08:16:12,141 INFO L263 BlockEncoder]: Using Maximize final states [2020-06-22 08:16:12,141 INFO L270 BlockEncoder]: Using Minimize states even if more edges are added than removed.=false [2020-06-22 08:16:12,142 INFO L276 BlockEncoder]: Using Minimize states using LBE with the strategy=SINGLE [2020-06-22 08:16:12,143 INFO L296 BlockEncoder]: Using Remove sink states [2020-06-22 08:16:12,144 INFO L171 BlockEncoder]: Using Apply optimizations until nothing changes=true [2020-06-22 08:16:12,145 INFO L179 BlockEncoder]: Using Rewrite not-equals [2020-06-22 08:16:12,188 INFO L185 BlockEncoder]: Using Use SBE [2020-06-22 08:16:12,292 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 22736 conjuctions. This might take some time... [2020-06-22 08:17:25,604 INFO L193 XnfTransformerHelper]: Simplified to disjunction of 22736 conjuctions. [2020-06-22 08:17:25,992 INFO L200 BlockEncoder]: SBE split 10 edges [2020-06-22 08:17:26,004 INFO L70 emoveInfeasibleEdges]: Removed 2 edges and 0 locations because of local infeasibility [2020-06-22 08:17:26,007 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-06-22 08:17:26,095 INFO L100 BaseMinimizeStates]: Removed 16 edges and 8 locations by large block encoding [2020-06-22 08:17:26,098 INFO L70 RemoveSinkStates]: Removed 4 edges and 2 locations by removing sink states [2020-06-22 08:17:26,103 INFO L70 emoveInfeasibleEdges]: Removed 0 edges and 0 locations because of local infeasibility [2020-06-22 08:17:26,104 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-06-22 08:17:26,105 INFO L100 BaseMinimizeStates]: Removed 0 edges and 0 locations by large block encoding [2020-06-22 08:17:26,105 INFO L70 RemoveSinkStates]: Removed 0 edges and 0 locations by removing sink states [2020-06-22 08:17:26,111 INFO L313 BlockEncoder]: Encoded RCFG 17 locations, 1383 edges [2020-06-22 08:17:26,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 22.06 08:17:26 BasicIcfg [2020-06-22 08:17:26,112 INFO L132 PluginConnector]: ------------------------ END BlockEncodingV2---------------------------- [2020-06-22 08:17:26,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-06-22 08:17:26,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-06-22 08:17:26,117 INFO L276 PluginConnector]: TraceAbstraction initialized [2020-06-22 08:17:26,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.06 08:16:11" (1/4) ... [2020-06-22 08:17:26,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c47f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 08:17:26, skipping insertion in model container [2020-06-22 08:17:26,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:16:11" (2/4) ... [2020-06-22 08:17:26,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c47f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 08:17:26, skipping insertion in model container [2020-06-22 08:17:26,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:16:12" (3/4) ... [2020-06-22 08:17:26,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c47f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 08:17:26, skipping insertion in model container [2020-06-22 08:17:26,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 22.06 08:17:26" (4/4) ... [2020-06-22 08:17:26,121 INFO L112 eAbstractionObserver]: Analyzing ICFG theBenchmark.c_BEv2 [2020-06-22 08:17:26,132 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2020-06-22 08:17:26,142 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-06-22 08:17:26,159 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-06-22 08:17:26,191 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2020-06-22 08:17:26,192 INFO L382 AbstractCegarLoop]: Interprodecural is true [2020-06-22 08:17:26,192 INFO L383 AbstractCegarLoop]: Hoare is true [2020-06-22 08:17:26,192 INFO L384 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2020-06-22 08:17:26,192 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-06-22 08:17:26,192 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-06-22 08:17:26,193 INFO L387 AbstractCegarLoop]: Difference is false [2020-06-22 08:17:26,193 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-06-22 08:17:26,193 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-06-22 08:17:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-06-22 08:17:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-06-22 08:17:26,219 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:17:26,220 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-06-22 08:17:26,220 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION]=== [2020-06-22 08:17:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:17:26,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1562799026, now seen corresponding path program 1 times [2020-06-22 08:17:26,227 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:17:26,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:17:26,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:17:26,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:17:26,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:17:26,319 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2020-06-22 08:17:26,319 INFO L258 seRefinementStrategy]: Advancing trace checker [2020-06-22 08:17:26,319 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-06-22 08:17:26,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:17:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:17:26,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2020-06-22 08:17:26,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2020-06-22 08:17:26,416 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 08:17:26,448 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:17:26,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-06-22 08:17:26,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-06-22 08:17:26,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-06-22 08:17:26,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:17:26,469 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-06-22 08:17:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:17:28,502 INFO L93 Difference]: Finished difference Result 28 states and 2740 transitions. [2020-06-22 08:17:28,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-06-22 08:17:28,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-06-22 08:17:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:17:28,518 INFO L225 Difference]: With dead ends: 28 [2020-06-22 08:17:28,518 INFO L226 Difference]: Without dead ends: 17 [2020-06-22 08:17:28,521 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:17:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-06-22 08:17:28,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-06-22 08:17:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-06-22 08:17:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 74 transitions. [2020-06-22 08:17:28,562 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 74 transitions. Word has length 8 [2020-06-22 08:17:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:17:28,563 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 74 transitions. [2020-06-22 08:17:28,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-06-22 08:17:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 74 transitions. [2020-06-22 08:17:28,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-06-22 08:17:28,564 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:17:28,564 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-06-22 08:17:28,564 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION]=== [2020-06-22 08:17:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:17:28,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1562798065, now seen corresponding path program 1 times [2020-06-22 08:17:28,565 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:17:28,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:17:28,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:17:28,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:17:28,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:17:28,570 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2020-06-22 08:17:28,571 INFO L258 seRefinementStrategy]: Advancing trace checker [2020-06-22 08:17:28,571 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-06-22 08:17:28,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:17:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:17:28,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2020-06-22 08:17:28,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2020-06-22 08:17:28,605 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 08:17:28,632 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:17:28,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-06-22 08:17:28,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-06-22 08:17:28,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-06-22 08:17:28,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:17:28,635 INFO L87 Difference]: Start difference. First operand 17 states and 74 transitions. Second operand 3 states. [2020-06-22 08:17:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:17:28,730 INFO L93 Difference]: Finished difference Result 28 states and 126 transitions. [2020-06-22 08:17:28,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-06-22 08:17:28,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-06-22 08:17:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:17:28,732 INFO L225 Difference]: With dead ends: 28 [2020-06-22 08:17:28,732 INFO L226 Difference]: Without dead ends: 17 [2020-06-22 08:17:28,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:17:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-06-22 08:17:28,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-06-22 08:17:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-06-22 08:17:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 71 transitions. [2020-06-22 08:17:28,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 71 transitions. Word has length 8 [2020-06-22 08:17:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:17:28,737 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 71 transitions. [2020-06-22 08:17:28,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-06-22 08:17:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 71 transitions. [2020-06-22 08:17:28,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-06-22 08:17:28,738 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:17:28,738 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-06-22 08:17:28,738 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION]=== [2020-06-22 08:17:28,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:17:28,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1562797104, now seen corresponding path program 1 times [2020-06-22 08:17:28,739 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:17:28,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:17:28,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:17:28,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:17:28,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:17:28,744 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2020-06-22 08:17:28,744 INFO L258 seRefinementStrategy]: Advancing trace checker [2020-06-22 08:17:28,744 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-06-22 08:17:28,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:17:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:17:28,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2020-06-22 08:17:28,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2020-06-22 08:17:28,776 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 08:17:28,804 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:17:28,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-06-22 08:17:28,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-06-22 08:17:28,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-06-22 08:17:28,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:17:28,805 INFO L87 Difference]: Start difference. First operand 17 states and 71 transitions. Second operand 3 states. [2020-06-22 08:17:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:17:28,968 INFO L93 Difference]: Finished difference Result 40 states and 184 transitions. [2020-06-22 08:17:28,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-06-22 08:17:28,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-06-22 08:17:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:17:28,969 INFO L225 Difference]: With dead ends: 40 [2020-06-22 08:17:28,969 INFO L226 Difference]: Without dead ends: 29 [2020-06-22 08:17:28,970 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:17:28,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-06-22 08:17:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2020-06-22 08:17:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-06-22 08:17:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 77 transitions. [2020-06-22 08:17:28,975 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 77 transitions. Word has length 8 [2020-06-22 08:17:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:17:28,976 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 77 transitions. [2020-06-22 08:17:28,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-06-22 08:17:28,976 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 77 transitions. [2020-06-22 08:17:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-06-22 08:17:28,976 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:17:28,977 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-06-22 08:17:28,977 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION]=== [2020-06-22 08:17:28,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:17:28,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1562796143, now seen corresponding path program 1 times [2020-06-22 08:17:28,977 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:17:28,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:17:28,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:17:28,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:17:28,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:17:28,983 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2020-06-22 08:17:28,983 INFO L258 seRefinementStrategy]: Advancing trace checker [2020-06-22 08:17:28,983 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-06-22 08:17:28,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:17:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:17:29,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2020-06-22 08:17:29,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2020-06-22 08:17:29,057 INFO L340 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-06-22 08:17:29,057 INFO L374 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-06-22 08:17:29,058 INFO L427 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-06-22 08:17:29,065 INFO L497 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-06-22 08:17:29,066 INFO L427 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-06-22 08:17:29,066 INFO L217 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:14 [2020-06-22 08:17:29,097 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 08:17:29,124 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:17:29,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-06-22 08:17:29,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-06-22 08:17:29,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-06-22 08:17:29,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-06-22 08:17:29,125 INFO L87 Difference]: Start difference. First operand 18 states and 77 transitions. Second operand 4 states. [2020-06-22 08:17:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:17:29,477 INFO L93 Difference]: Finished difference Result 39 states and 187 transitions. [2020-06-22 08:17:29,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-06-22 08:17:29,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-06-22 08:17:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:17:29,479 INFO L225 Difference]: With dead ends: 39 [2020-06-22 08:17:29,479 INFO L226 Difference]: Without dead ends: 37 [2020-06-22 08:17:29,479 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-06-22 08:17:29,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-06-22 08:17:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2020-06-22 08:17:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-06-22 08:17:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 131 transitions. [2020-06-22 08:17:29,485 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 131 transitions. Word has length 8 [2020-06-22 08:17:29,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:17:29,486 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 131 transitions. [2020-06-22 08:17:29,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-06-22 08:17:29,486 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 131 transitions. [2020-06-22 08:17:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-06-22 08:17:29,487 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:17:29,487 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-06-22 08:17:29,487 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION]=== [2020-06-22 08:17:29,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:17:29,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1562796141, now seen corresponding path program 1 times [2020-06-22 08:17:29,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:17:29,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:17:29,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:17:29,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:17:29,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:17:29,492 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2020-06-22 08:17:29,492 INFO L258 seRefinementStrategy]: Advancing trace checker [2020-06-22 08:17:29,492 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-06-22 08:17:29,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:17:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:17:29,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2020-06-22 08:17:29,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2020-06-22 08:17:29,538 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 08:17:29,565 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:17:29,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-06-22 08:17:29,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-06-22 08:17:29,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-06-22 08:17:29,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-06-22 08:17:29,567 INFO L87 Difference]: Start difference. First operand 24 states and 131 transitions. Second operand 4 states. [2020-06-22 08:17:29,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:17:29,680 INFO L93 Difference]: Finished difference Result 40 states and 231 transitions. [2020-06-22 08:17:29,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-06-22 08:17:29,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-06-22 08:17:29,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:17:29,681 INFO L225 Difference]: With dead ends: 40 [2020-06-22 08:17:29,681 INFO L226 Difference]: Without dead ends: 24 [2020-06-22 08:17:29,682 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-06-22 08:17:29,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-06-22 08:17:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-06-22 08:17:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-06-22 08:17:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 84 transitions. [2020-06-22 08:17:29,687 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 84 transitions. Word has length 8 [2020-06-22 08:17:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:17:29,687 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 84 transitions. [2020-06-22 08:17:29,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-06-22 08:17:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 84 transitions. [2020-06-22 08:17:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-06-22 08:17:29,688 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:17:29,688 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-06-22 08:17:29,688 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION]=== [2020-06-22 08:17:29,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:17:29,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1562796140, now seen corresponding path program 1 times [2020-06-22 08:17:29,689 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:17:29,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:17:29,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:17:29,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:17:29,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:17:29,693 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2020-06-22 08:17:29,694 INFO L258 seRefinementStrategy]: Advancing trace checker [2020-06-22 08:17:29,694 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /export/starexec/sandbox2/solver/bin/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-06-22 08:17:29,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:17:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 08:17:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 08:17:29,768 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2020-06-22 08:17:29,790 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2020-06-22 08:17:29,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 08:17:29 BasicIcfg [2020-06-22 08:17:29,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-06-22 08:17:29,795 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-06-22 08:17:29,795 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-06-22 08:17:29,798 INFO L276 PluginConnector]: BuchiAutomizer initialized [2020-06-22 08:17:29,799 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:17:29,799 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:17:29,799 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:17:29,799 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:17:29,799 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:17:29,799 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-06-22 08:17:29,800 INFO L168 Benchmark]: Toolchain (without parser) took 78370.71 ms. Allocated memory was 649.6 MB in the beginning and 764.9 MB in the end (delta: 115.3 MB). Free memory was 558.8 MB in the beginning and 513.4 MB in the end (delta: 45.4 MB). Peak memory consumption was 160.8 MB. Max. memory is 50.3 GB. [2020-06-22 08:17:29,801 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 649.6 MB. Free memory is still 580.4 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-06-22 08:17:29,801 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.13 ms. Allocated memory was 649.6 MB in the beginning and 673.7 MB in the end (delta: 24.1 MB). Free memory was 558.8 MB in the beginning and 638.3 MB in the end (delta: -79.5 MB). Peak memory consumption was 28.8 MB. Max. memory is 50.3 GB. [2020-06-22 08:17:29,802 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.58 ms. Allocated memory is still 673.7 MB. Free memory was 638.3 MB in the beginning and 635.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 50.3 GB. [2020-06-22 08:17:29,802 INFO L168 Benchmark]: Boogie Preprocessor took 24.96 ms. Allocated memory is still 673.7 MB. Free memory was 635.6 MB in the beginning and 634.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. [2020-06-22 08:17:29,803 INFO L168 Benchmark]: RCFGBuilder took 304.64 ms. Allocated memory is still 673.7 MB. Free memory was 634.3 MB in the beginning and 613.4 MB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 50.3 GB. [2020-06-22 08:17:29,803 INFO L168 Benchmark]: BlockEncodingV2 took 73996.71 ms. Allocated memory is still 673.7 MB. Free memory was 613.4 MB in the beginning and 391.3 MB in the end (delta: 222.1 MB). Peak memory consumption was 222.1 MB. Max. memory is 50.3 GB. [2020-06-22 08:17:29,804 INFO L168 Benchmark]: TraceAbstraction took 3680.72 ms. Allocated memory was 673.7 MB in the beginning and 764.9 MB in the end (delta: 91.2 MB). Free memory was 390.0 MB in the beginning and 518.6 MB in the end (delta: -128.6 MB). There was no memory consumed. Max. memory is 50.3 GB. [2020-06-22 08:17:29,805 INFO L168 Benchmark]: BuchiAutomizer took 4.56 ms. Allocated memory is still 764.9 MB. Free memory was 518.6 MB in the beginning and 513.4 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 50.3 GB. [2020-06-22 08:17:29,810 INFO L337 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 27 locations, 33 edges - StatisticsResult: Encoded RCFG 17 locations, 1383 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 580.4 MB. There was no memory consumed. Max. memory is 50.3 GB. * CACSL2BoogieTranslator took 314.13 ms. Allocated memory was 649.6 MB in the beginning and 673.7 MB in the end (delta: 24.1 MB). Free memory was 558.8 MB in the beginning and 638.3 MB in the end (delta: -79.5 MB). Peak memory consumption was 28.8 MB. Max. memory is 50.3 GB. * Boogie Procedure Inliner took 39.58 ms. Allocated memory is still 673.7 MB. Free memory was 638.3 MB in the beginning and 635.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 50.3 GB. * Boogie Preprocessor took 24.96 ms. Allocated memory is still 673.7 MB. Free memory was 635.6 MB in the beginning and 634.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. * RCFGBuilder took 304.64 ms. Allocated memory is still 673.7 MB. Free memory was 634.3 MB in the beginning and 613.4 MB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 50.3 GB. * BlockEncodingV2 took 73996.71 ms. Allocated memory is still 673.7 MB. Free memory was 613.4 MB in the beginning and 391.3 MB in the end (delta: 222.1 MB). Peak memory consumption was 222.1 MB. Max. memory is 50.3 GB. * TraceAbstraction took 3680.72 ms. Allocated memory was 673.7 MB in the beginning and 764.9 MB in the end (delta: 91.2 MB). Free memory was 390.0 MB in the beginning and 518.6 MB in the end (delta: -128.6 MB). There was no memory consumed. Max. memory is 50.3 GB. * BuchiAutomizer took 4.56 ms. Allocated memory is still 764.9 MB. Free memory was 518.6 MB in the beginning and 513.4 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 50.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L5] int i, j; [L6] int length = __VERIFIER_nondet_int(); [L7] COND TRUE length < 1 [L7] length = 1 [L8] int fac = __VERIFIER_nondet_int(); [L9] COND FALSE !(fac < 1) [L10] int *arr = alloca(length); [L11] int *arr2 = alloca(fac*length); [L12] COND FALSE !(!arr || !arr2) [L13] i=0 [L13] COND TRUE i