MAYBE Ultimate: Cannot open display: This is Ultimate 0.1.24-8dc7c08-m [2020-06-22 08:38:40,072 INFO L170 SettingsManager]: Resetting all preferences to default values... [2020-06-22 08:38:40,074 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2020-06-22 08:38:40,084 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-06-22 08:38:40,085 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-06-22 08:38:40,087 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-06-22 08:38:40,088 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-06-22 08:38:40,089 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2020-06-22 08:38:40,091 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-06-22 08:38:40,091 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-06-22 08:38:40,092 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-06-22 08:38:40,093 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-06-22 08:38:40,093 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-06-22 08:38:40,094 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-06-22 08:38:40,095 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-06-22 08:38:40,096 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-06-22 08:38:40,097 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-06-22 08:38:40,098 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-06-22 08:38:40,100 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2020-06-22 08:38:40,102 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-06-22 08:38:40,102 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-06-22 08:38:40,104 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-06-22 08:38:40,105 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-06-22 08:38:40,106 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-06-22 08:38:40,106 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-06-22 08:38:40,107 INFO L174 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-06-22 08:38:40,107 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-06-22 08:38:40,108 INFO L177 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-06-22 08:38:40,108 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-06-22 08:38:40,109 INFO L174 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-06-22 08:38:40,110 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-06-22 08:38:40,110 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2020-06-22 08:38:40,111 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-06-22 08:38:40,111 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2020-06-22 08:38:40,112 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-06-22 08:38:40,112 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-06-22 08:38:40,112 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2020-06-22 08:38:40,113 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2020-06-22 08:38:40,114 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2020-06-22 08:38:40,114 INFO L98 SettingsManager]: Beginning loading settings from /export/starexec/sandbox2/solver/bin/./../termcomp2017.epf [2020-06-22 08:38:40,128 INFO L110 SettingsManager]: Loading preferences was successful [2020-06-22 08:38:40,128 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2020-06-22 08:38:40,129 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-06-22 08:38:40,130 INFO L133 SettingsManager]: * Rewrite not-equals=true [2020-06-22 08:38:40,130 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2020-06-22 08:38:40,130 INFO L133 SettingsManager]: * Minimize states using LBE with the strategy=SINGLE [2020-06-22 08:38:40,130 INFO L133 SettingsManager]: * Use SBE=true [2020-06-22 08:38:40,130 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-06-22 08:38:40,130 INFO L133 SettingsManager]: * Use old map elimination=false [2020-06-22 08:38:40,131 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2020-06-22 08:38:40,131 INFO L133 SettingsManager]: * Buchi interpolant automaton construction strategy=DANDELION [2020-06-22 08:38:40,131 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2020-06-22 08:38:40,131 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-06-22 08:38:40,131 INFO L133 SettingsManager]: * Construct termination proof for TermComp=true [2020-06-22 08:38:40,131 INFO L133 SettingsManager]: * Command for external solver (GNTA synthesis)=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 08:38:40,131 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-06-22 08:38:40,132 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-06-22 08:38:40,132 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2020-06-22 08:38:40,132 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2020-06-22 08:38:40,132 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-06-22 08:38:40,132 INFO L133 SettingsManager]: * How to treat unsigned ints differently from normal ones=IGNORE [2020-06-22 08:38:40,132 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-06-22 08:38:40,133 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-06-22 08:38:40,133 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-06-22 08:38:40,133 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-06-22 08:38:40,133 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-06-22 08:38:40,133 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-06-22 08:38:40,133 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2020-06-22 08:38:40,133 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-06-22 08:38:40,158 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-06-22 08:38:40,170 INFO L259 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-06-22 08:38:40,174 INFO L215 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-06-22 08:38:40,175 INFO L271 PluginConnector]: Initializing CDTParser... [2020-06-22 08:38:40,175 INFO L276 PluginConnector]: CDTParser initialized [2020-06-22 08:38:40,176 INFO L430 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /export/starexec/sandbox2/benchmark/theBenchmark.c [2020-06-22 08:38:40,245 INFO L221 CDTParser]: Created temporary CDT project at /export/starexec/sandbox2/tmp/cfb2fbf9ddf6466a8eaaa26fdd4107db/FLAGb88383d55 [2020-06-22 08:38:40,586 INFO L307 CDTParser]: Found 1 translation units. [2020-06-22 08:38:40,587 INFO L161 CDTParser]: Scanning /export/starexec/sandbox2/benchmark/theBenchmark.c [2020-06-22 08:38:40,587 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2020-06-22 08:38:40,594 INFO L355 CDTParser]: About to delete temporary CDT project at /export/starexec/sandbox2/tmp/cfb2fbf9ddf6466a8eaaa26fdd4107db/FLAGb88383d55 [2020-06-22 08:38:40,978 INFO L363 CDTParser]: Successfully deleted /export/starexec/sandbox2/tmp/cfb2fbf9ddf6466a8eaaa26fdd4107db [2020-06-22 08:38:40,989 INFO L297 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-06-22 08:38:40,991 INFO L131 ToolchainWalker]: Walking toolchain with 7 elements. [2020-06-22 08:38:40,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-06-22 08:38:40,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-06-22 08:38:40,996 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2020-06-22 08:38:40,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.06 08:38:40" (1/1) ... [2020-06-22 08:38:41,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2069d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:38:40, skipping insertion in model container [2020-06-22 08:38:41,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.06 08:38:40" (1/1) ... [2020-06-22 08:38:41,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-06-22 08:38:41,025 INFO L176 MainTranslator]: Built tables and reachable declarations [2020-06-22 08:38:41,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-06-22 08:38:41,263 INFO L191 MainTranslator]: Completed pre-run [2020-06-22 08:38:41,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-06-22 08:38:41,302 INFO L195 MainTranslator]: Completed translation [2020-06-22 08:38:41,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:38:41 WrapperNode [2020-06-22 08:38:41,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-06-22 08:38:41,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-06-22 08:38:41,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-06-22 08:38:41,304 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2020-06-22 08:38:41,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:38:41" (1/1) ... [2020-06-22 08:38:41,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:38:41" (1/1) ... [2020-06-22 08:38:41,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-06-22 08:38:41,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-06-22 08:38:41,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-06-22 08:38:41,350 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2020-06-22 08:38:41,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:38:41" (1/1) ... [2020-06-22 08:38:41,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:38:41" (1/1) ... [2020-06-22 08:38:41,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:38:41" (1/1) ... [2020-06-22 08:38:41,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:38:41" (1/1) ... [2020-06-22 08:38:41,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:38:41" (1/1) ... [2020-06-22 08:38:41,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:38:41" (1/1) ... [2020-06-22 08:38:41,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:38:41" (1/1) ... [2020-06-22 08:38:41,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-06-22 08:38:41,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-06-22 08:38:41,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-06-22 08:38:41,381 INFO L276 PluginConnector]: RCFGBuilder initialized [2020-06-22 08:38:41,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:38:41" (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 08:38:41,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-06-22 08:38:41,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-06-22 08:38:41,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-06-22 08:38:41,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-06-22 08:38:41,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-06-22 08:38:41,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-06-22 08:38:41,797 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-06-22 08:38:41,798 INFO L286 CfgBuilder]: Removed 10 assue(true) statements. [2020-06-22 08:38:41,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:38:41 BoogieIcfgContainer [2020-06-22 08:38:41,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-06-22 08:38:41,800 INFO L113 PluginConnector]: ------------------------BlockEncodingV2---------------------------- [2020-06-22 08:38:41,800 INFO L271 PluginConnector]: Initializing BlockEncodingV2... [2020-06-22 08:38:41,802 INFO L276 PluginConnector]: BlockEncodingV2 initialized [2020-06-22 08:38:41,803 INFO L185 PluginConnector]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:38:41" (1/1) ... [2020-06-22 08:38:41,823 INFO L313 BlockEncoder]: Initial Icfg 57 locations, 67 edges [2020-06-22 08:38:41,824 INFO L258 BlockEncoder]: Using Remove infeasible edges [2020-06-22 08:38:41,825 INFO L263 BlockEncoder]: Using Maximize final states [2020-06-22 08:38:41,826 INFO L270 BlockEncoder]: Using Minimize states even if more edges are added than removed.=false [2020-06-22 08:38:41,826 INFO L276 BlockEncoder]: Using Minimize states using LBE with the strategy=SINGLE [2020-06-22 08:38:41,828 INFO L296 BlockEncoder]: Using Remove sink states [2020-06-22 08:38:41,829 INFO L171 BlockEncoder]: Using Apply optimizations until nothing changes=true [2020-06-22 08:38:41,829 INFO L179 BlockEncoder]: Using Rewrite not-equals [2020-06-22 08:38:41,855 INFO L185 BlockEncoder]: Using Use SBE [2020-06-22 08:38:41,889 INFO L200 BlockEncoder]: SBE split 25 edges [2020-06-22 08:38:41,894 INFO L70 emoveInfeasibleEdges]: Removed 4 edges and 0 locations because of local infeasibility [2020-06-22 08:38:41,896 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-06-22 08:38:41,958 INFO L100 BaseMinimizeStates]: Removed 20 edges and 10 locations by large block encoding [2020-06-22 08:38:41,961 INFO L70 RemoveSinkStates]: Removed 1 edges and 1 locations by removing sink states [2020-06-22 08:38:41,962 INFO L70 emoveInfeasibleEdges]: Removed 0 edges and 0 locations because of local infeasibility [2020-06-22 08:38:41,963 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-06-22 08:38:41,963 INFO L100 BaseMinimizeStates]: Removed 0 edges and 0 locations by large block encoding [2020-06-22 08:38:41,964 INFO L70 RemoveSinkStates]: Removed 0 edges and 0 locations by removing sink states [2020-06-22 08:38:41,964 INFO L313 BlockEncoder]: Encoded RCFG 46 locations, 79 edges [2020-06-22 08:38:41,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 22.06 08:38:41 BasicIcfg [2020-06-22 08:38:41,965 INFO L132 PluginConnector]: ------------------------ END BlockEncodingV2---------------------------- [2020-06-22 08:38:41,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-06-22 08:38:41,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-06-22 08:38:41,969 INFO L276 PluginConnector]: TraceAbstraction initialized [2020-06-22 08:38:41,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.06 08:38:40" (1/4) ... [2020-06-22 08:38:41,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a528fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 08:38:41, skipping insertion in model container [2020-06-22 08:38:41,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:38:41" (2/4) ... [2020-06-22 08:38:41,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a528fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 08:38:41, skipping insertion in model container [2020-06-22 08:38:41,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:38:41" (3/4) ... [2020-06-22 08:38:41,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a528fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 08:38:41, skipping insertion in model container [2020-06-22 08:38:41,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 22.06 08:38:41" (4/4) ... [2020-06-22 08:38:41,973 INFO L112 eAbstractionObserver]: Analyzing ICFG theBenchmark.c_BEv2 [2020-06-22 08:38:41,983 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2020-06-22 08:38:41,992 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 22 error locations. [2020-06-22 08:38:42,008 INFO L257 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2020-06-22 08:38:42,036 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2020-06-22 08:38:42,037 INFO L382 AbstractCegarLoop]: Interprodecural is true [2020-06-22 08:38:42,037 INFO L383 AbstractCegarLoop]: Hoare is true [2020-06-22 08:38:42,038 INFO L384 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2020-06-22 08:38:42,038 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-06-22 08:38:42,038 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-06-22 08:38:42,038 INFO L387 AbstractCegarLoop]: Difference is false [2020-06-22 08:38:42,038 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-06-22 08:38:42,038 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-06-22 08:38:42,053 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-06-22 08:38:42,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-06-22 08:38:42,059 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:38:42,060 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-06-22 08:38:42,060 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION]=== [2020-06-22 08:38:42,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:38:42,066 INFO L82 PathProgramCache]: Analyzing trace with hash 5480954, now seen corresponding path program 1 times [2020-06-22 08:38:42,068 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:38:42,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:38:42,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:42,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:38:42,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:38:42,259 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 08:38:42,261 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:38:42,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-06-22 08:38:42,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-06-22 08:38:42,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-06-22 08:38:42,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:38:42,282 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 3 states. [2020-06-22 08:38:42,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:38:42,431 INFO L93 Difference]: Finished difference Result 46 states and 79 transitions. [2020-06-22 08:38:42,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-06-22 08:38:42,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-06-22 08:38:42,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:38:42,447 INFO L225 Difference]: With dead ends: 46 [2020-06-22 08:38:42,447 INFO L226 Difference]: Without dead ends: 39 [2020-06-22 08:38:42,451 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:38:42,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-06-22 08:38:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-06-22 08:38:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-06-22 08:38:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 65 transitions. [2020-06-22 08:38:42,491 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 65 transitions. Word has length 4 [2020-06-22 08:38:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:38:42,492 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 65 transitions. [2020-06-22 08:38:42,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-06-22 08:38:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 65 transitions. [2020-06-22 08:38:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-06-22 08:38:42,493 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:38:42,493 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-06-22 08:38:42,493 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION]=== [2020-06-22 08:38:42,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:38:42,494 INFO L82 PathProgramCache]: Analyzing trace with hash 5480956, now seen corresponding path program 1 times [2020-06-22 08:38:42,494 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:38:42,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:38:42,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:42,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:38:42,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:38:42,548 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 08:38:42,548 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:38:42,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-06-22 08:38:42,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-06-22 08:38:42,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-06-22 08:38:42,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-06-22 08:38:42,551 INFO L87 Difference]: Start difference. First operand 39 states and 65 transitions. Second operand 4 states. [2020-06-22 08:38:42,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:38:42,719 INFO L93 Difference]: Finished difference Result 44 states and 65 transitions. [2020-06-22 08:38:42,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-06-22 08:38:42,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-06-22 08:38:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:38:42,721 INFO L225 Difference]: With dead ends: 44 [2020-06-22 08:38:42,721 INFO L226 Difference]: Without dead ends: 39 [2020-06-22 08:38:42,722 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-06-22 08:38:42,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-06-22 08:38:42,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-06-22 08:38:42,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-06-22 08:38:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 60 transitions. [2020-06-22 08:38:42,728 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 60 transitions. Word has length 4 [2020-06-22 08:38:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:38:42,728 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 60 transitions. [2020-06-22 08:38:42,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-06-22 08:38:42,729 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 60 transitions. [2020-06-22 08:38:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-06-22 08:38:42,729 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:38:42,729 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-06-22 08:38:42,729 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION]=== [2020-06-22 08:38:42,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:38:42,730 INFO L82 PathProgramCache]: Analyzing trace with hash 5480957, now seen corresponding path program 1 times [2020-06-22 08:38:42,730 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:38:42,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:38:42,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:42,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:38:42,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:38:42,772 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 08:38:42,772 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:38:42,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-06-22 08:38:42,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-06-22 08:38:42,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-06-22 08:38:42,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:38:42,774 INFO L87 Difference]: Start difference. First operand 39 states and 60 transitions. Second operand 3 states. [2020-06-22 08:38:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:38:42,883 INFO L93 Difference]: Finished difference Result 45 states and 69 transitions. [2020-06-22 08:38:42,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-06-22 08:38:42,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-06-22 08:38:42,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:38:42,886 INFO L225 Difference]: With dead ends: 45 [2020-06-22 08:38:42,886 INFO L226 Difference]: Without dead ends: 44 [2020-06-22 08:38:42,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:38:42,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-06-22 08:38:42,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-06-22 08:38:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-06-22 08:38:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 63 transitions. [2020-06-22 08:38:42,893 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 63 transitions. Word has length 4 [2020-06-22 08:38:42,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:38:42,893 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 63 transitions. [2020-06-22 08:38:42,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-06-22 08:38:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 63 transitions. [2020-06-22 08:38:42,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-06-22 08:38:42,894 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:38:42,894 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-06-22 08:38:42,894 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION]=== [2020-06-22 08:38:42,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:38:42,895 INFO L82 PathProgramCache]: Analyzing trace with hash 169907159, now seen corresponding path program 1 times [2020-06-22 08:38:42,895 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:38:42,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:38:42,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:42,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:38:42,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:38:42,926 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 08:38:42,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:38:42,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-06-22 08:38:42,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-06-22 08:38:42,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-06-22 08:38:42,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:38:42,927 INFO L87 Difference]: Start difference. First operand 41 states and 63 transitions. Second operand 3 states. [2020-06-22 08:38:43,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:38:43,021 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2020-06-22 08:38:43,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-06-22 08:38:43,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-06-22 08:38:43,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:38:43,022 INFO L225 Difference]: With dead ends: 41 [2020-06-22 08:38:43,023 INFO L226 Difference]: Without dead ends: 39 [2020-06-22 08:38:43,024 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:38:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-06-22 08:38:43,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-06-22 08:38:43,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-06-22 08:38:43,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 59 transitions. [2020-06-22 08:38:43,029 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 59 transitions. Word has length 5 [2020-06-22 08:38:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:38:43,030 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 59 transitions. [2020-06-22 08:38:43,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-06-22 08:38:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 59 transitions. [2020-06-22 08:38:43,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-06-22 08:38:43,030 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:38:43,031 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-06-22 08:38:43,031 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION]=== [2020-06-22 08:38:43,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:38:43,031 INFO L82 PathProgramCache]: Analyzing trace with hash 169907161, now seen corresponding path program 1 times [2020-06-22 08:38:43,032 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:38:43,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:38:43,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:43,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:38:43,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:38:43,082 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 08:38:43,083 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:38:43,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-06-22 08:38:43,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-06-22 08:38:43,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-06-22 08:38:43,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-06-22 08:38:43,084 INFO L87 Difference]: Start difference. First operand 39 states and 59 transitions. Second operand 4 states. [2020-06-22 08:38:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:38:43,203 INFO L93 Difference]: Finished difference Result 41 states and 59 transitions. [2020-06-22 08:38:43,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-06-22 08:38:43,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-06-22 08:38:43,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:38:43,205 INFO L225 Difference]: With dead ends: 41 [2020-06-22 08:38:43,205 INFO L226 Difference]: Without dead ends: 39 [2020-06-22 08:38:43,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-06-22 08:38:43,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-06-22 08:38:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-06-22 08:38:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-06-22 08:38:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 57 transitions. [2020-06-22 08:38:43,211 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 57 transitions. Word has length 5 [2020-06-22 08:38:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:38:43,212 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 57 transitions. [2020-06-22 08:38:43,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-06-22 08:38:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 57 transitions. [2020-06-22 08:38:43,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-06-22 08:38:43,212 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:38:43,212 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-06-22 08:38:43,213 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION]=== [2020-06-22 08:38:43,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:38:43,213 INFO L82 PathProgramCache]: Analyzing trace with hash 169907162, now seen corresponding path program 1 times [2020-06-22 08:38:43,213 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:38:43,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:38:43,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:43,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:38:43,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:38:43,254 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 08:38:43,255 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:38:43,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-06-22 08:38:43,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-06-22 08:38:43,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-06-22 08:38:43,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-06-22 08:38:43,256 INFO L87 Difference]: Start difference. First operand 39 states and 57 transitions. Second operand 4 states. [2020-06-22 08:38:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:38:43,345 INFO L93 Difference]: Finished difference Result 39 states and 57 transitions. [2020-06-22 08:38:43,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-06-22 08:38:43,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-06-22 08:38:43,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:38:43,346 INFO L225 Difference]: With dead ends: 39 [2020-06-22 08:38:43,346 INFO L226 Difference]: Without dead ends: 27 [2020-06-22 08:38:43,347 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-06-22 08:38:43,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-06-22 08:38:43,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-06-22 08:38:43,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-06-22 08:38:43,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 40 transitions. [2020-06-22 08:38:43,351 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 40 transitions. Word has length 5 [2020-06-22 08:38:43,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:38:43,351 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 40 transitions. [2020-06-22 08:38:43,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-06-22 08:38:43,352 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 40 transitions. [2020-06-22 08:38:43,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-06-22 08:38:43,352 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:38:43,352 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-06-22 08:38:43,352 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION]=== [2020-06-22 08:38:43,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:38:43,353 INFO L82 PathProgramCache]: Analyzing trace with hash 976221499, now seen corresponding path program 1 times [2020-06-22 08:38:43,353 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:38:43,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:38:43,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:43,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:38:43,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:38:43,386 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 08:38:43,386 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:38:43,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-06-22 08:38:43,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-06-22 08:38:43,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-06-22 08:38:43,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-06-22 08:38:43,387 INFO L87 Difference]: Start difference. First operand 25 states and 40 transitions. Second operand 4 states. [2020-06-22 08:38:43,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:38:43,464 INFO L93 Difference]: Finished difference Result 49 states and 76 transitions. [2020-06-22 08:38:43,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-06-22 08:38:43,464 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-06-22 08:38:43,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:38:43,465 INFO L225 Difference]: With dead ends: 49 [2020-06-22 08:38:43,465 INFO L226 Difference]: Without dead ends: 28 [2020-06-22 08:38:43,465 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-06-22 08:38:43,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-06-22 08:38:43,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-06-22 08:38:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-06-22 08:38:43,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 41 transitions. [2020-06-22 08:38:43,470 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 41 transitions. Word has length 6 [2020-06-22 08:38:43,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:38:43,470 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 41 transitions. [2020-06-22 08:38:43,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-06-22 08:38:43,470 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 41 transitions. [2020-06-22 08:38:43,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-06-22 08:38:43,471 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:38:43,471 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-06-22 08:38:43,471 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION]=== [2020-06-22 08:38:43,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:38:43,471 INFO L82 PathProgramCache]: Analyzing trace with hash 543795836, now seen corresponding path program 1 times [2020-06-22 08:38:43,471 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:38:43,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:38:43,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:43,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:38:43,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:38:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 08:38:43,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2020-06-22 08:38:43,518 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2020-06-22 08:38:43,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:38:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:38:43,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2020-06-22 08:38:43,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2020-06-22 08:38:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 08:38:43,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-06-22 08:38:43,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-06-22 08:38:43,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-06-22 08:38:43,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-06-22 08:38:43,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-06-22 08:38:43,624 INFO L87 Difference]: Start difference. First operand 26 states and 41 transitions. Second operand 7 states. [2020-06-22 08:38:43,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:38:43,747 INFO L93 Difference]: Finished difference Result 72 states and 110 transitions. [2020-06-22 08:38:43,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-06-22 08:38:43,748 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-06-22 08:38:43,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:38:43,749 INFO L225 Difference]: With dead ends: 72 [2020-06-22 08:38:43,749 INFO L226 Difference]: Without dead ends: 51 [2020-06-22 08:38:43,749 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-06-22 08:38:43,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-06-22 08:38:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2020-06-22 08:38:43,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-06-22 08:38:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 44 transitions. [2020-06-22 08:38:43,754 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 44 transitions. Word has length 9 [2020-06-22 08:38:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:38:43,755 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 44 transitions. [2020-06-22 08:38:43,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-06-22 08:38:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 44 transitions. [2020-06-22 08:38:43,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-06-22 08:38:43,755 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:38:43,755 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-06-22 08:38:43,756 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION]=== [2020-06-22 08:38:43,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:38:43,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1242209893, now seen corresponding path program 2 times [2020-06-22 08:38:43,756 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:38:43,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:38:43,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:43,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:38:43,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:38:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 08:38:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 08:38:43,818 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2020-06-22 08:38:43,857 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2020-06-22 08:38:43,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 08:38:43 BasicIcfg [2020-06-22 08:38:43,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-06-22 08:38:43,861 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-06-22 08:38:43,861 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-06-22 08:38:43,865 INFO L276 PluginConnector]: BuchiAutomizer initialized [2020-06-22 08:38:43,865 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:38:43,865 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:38:43,865 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:38:43,865 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:38:43,865 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:38:43,865 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-06-22 08:38:43,866 INFO L168 Benchmark]: Toolchain (without parser) took 2875.97 ms. Allocated memory was 649.6 MB in the beginning and 753.4 MB in the end (delta: 103.8 MB). Free memory was 564.1 MB in the beginning and 711.0 MB in the end (delta: -146.9 MB). There was no memory consumed. Max. memory is 50.3 GB. [2020-06-22 08:38:43,868 INFO L168 Benchmark]: CDTParser took 0.16 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 08:38:43,868 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.31 ms. Allocated memory was 649.6 MB in the beginning and 695.2 MB in the end (delta: 45.6 MB). Free memory was 564.1 MB in the beginning and 658.7 MB in the end (delta: -94.6 MB). Peak memory consumption was 29.8 MB. Max. memory is 50.3 GB. [2020-06-22 08:38:43,869 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.24 ms. Allocated memory is still 695.2 MB. Free memory was 657.4 MB in the beginning and 656.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. [2020-06-22 08:38:43,869 INFO L168 Benchmark]: Boogie Preprocessor took 29.78 ms. Allocated memory is still 695.2 MB. Free memory was 656.0 MB in the beginning and 654.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. [2020-06-22 08:38:43,870 INFO L168 Benchmark]: RCFGBuilder took 419.16 ms. Allocated memory is still 695.2 MB. Free memory was 653.3 MB in the beginning and 624.3 MB in the end (delta: 29.0 MB). Peak memory consumption was 29.0 MB. Max. memory is 50.3 GB. [2020-06-22 08:38:43,871 INFO L168 Benchmark]: BlockEncodingV2 took 164.88 ms. Allocated memory is still 695.2 MB. Free memory was 624.3 MB in the beginning and 613.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 50.3 GB. [2020-06-22 08:38:43,871 INFO L168 Benchmark]: TraceAbstraction took 1895.20 ms. Allocated memory was 695.2 MB in the beginning and 753.4 MB in the end (delta: 58.2 MB). Free memory was 612.2 MB in the beginning and 711.0 MB in the end (delta: -98.8 MB). Peak memory consumption was 225.0 MB. Max. memory is 50.3 GB. [2020-06-22 08:38:43,872 INFO L168 Benchmark]: BuchiAutomizer took 4.31 ms. Allocated memory is still 753.4 MB. Free memory is still 711.0 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-06-22 08:38:43,876 INFO L337 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 57 locations, 67 edges - StatisticsResult: Encoded RCFG 46 locations, 79 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 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 311.31 ms. Allocated memory was 649.6 MB in the beginning and 695.2 MB in the end (delta: 45.6 MB). Free memory was 564.1 MB in the beginning and 658.7 MB in the end (delta: -94.6 MB). Peak memory consumption was 29.8 MB. Max. memory is 50.3 GB. * Boogie Procedure Inliner took 46.24 ms. Allocated memory is still 695.2 MB. Free memory was 657.4 MB in the beginning and 656.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. * Boogie Preprocessor took 29.78 ms. Allocated memory is still 695.2 MB. Free memory was 656.0 MB in the beginning and 654.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. * RCFGBuilder took 419.16 ms. Allocated memory is still 695.2 MB. Free memory was 653.3 MB in the beginning and 624.3 MB in the end (delta: 29.0 MB). Peak memory consumption was 29.0 MB. Max. memory is 50.3 GB. * BlockEncodingV2 took 164.88 ms. Allocated memory is still 695.2 MB. Free memory was 624.3 MB in the beginning and 613.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 50.3 GB. * TraceAbstraction took 1895.20 ms. Allocated memory was 695.2 MB in the beginning and 753.4 MB in the end (delta: 58.2 MB). Free memory was 612.2 MB in the beginning and 711.0 MB in the end (delta: -98.8 MB). Peak memory consumption was 225.0 MB. Max. memory is 50.3 GB. * BuchiAutomizer took 4.31 ms. Allocated memory is still 753.4 MB. Free memory is still 711.0 MB. There was no memory consumed. Max. memory is 50.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L33] int *a; [L34] int N = __VERIFIER_nondet_int(); [L10] int *best, *prev, i, j, max = 0; [L11] best = (int*) malloc(sizeof(int) * N) [L12] prev = (int*) malloc(sizeof(int) * N) [L14] i = 0 [L14] COND TRUE i < N [L15] best[i] = 1 [L15] prev[i] = i [L14] i++ [L14] COND TRUE i < N [L15] best[i] = 1 [L15] prev[i] = i [L14] i++ [L14] COND FALSE !(i < N) [L17] i = 1 [L17] COND TRUE i < N [L18] j = 0 [L18] COND TRUE j < i [L19] a[i] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 46 locations, 22 error locations. UNSAFE Result, 1.8s OverallTime, 9 OverallIterations, 2 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 99 SDtfs, 406 SDslu, 144 SDs, 0 SdLazy, 533 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred 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: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 29 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 874 SizeOfPredicates, 2 NumberOfNonLiveVariables, 68 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! !SESSION 2020-06-22 08:38:37.702 ----------------------------------------------- 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 08:38:44.106 !MESSAGE The workspace will exit with unsaved changes in this session. Received shutdown request... Ultimate: GTK+ Version Check