/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=06.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b665a9c [2020-09-29 14:38:51,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-29 14:38:51,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-29 14:38:51,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-29 14:38:51,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-29 14:38:51,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-29 14:38:51,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-29 14:38:51,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-29 14:38:51,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-29 14:38:51,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-29 14:38:51,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-29 14:38:51,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-29 14:38:51,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-29 14:38:51,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-29 14:38:51,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-29 14:38:51,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-29 14:38:51,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-29 14:38:51,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-29 14:38:51,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-29 14:38:51,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-29 14:38:51,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-29 14:38:51,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-29 14:38:51,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-29 14:38:51,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-29 14:38:51,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-29 14:38:51,784 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-09-29 14:38:51,808 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-29 14:38:51,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-29 14:38:51,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-29 14:38:51,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-29 14:38:51,810 INFO L138 SettingsManager]: * Use SBE=true [2020-09-29 14:38:51,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-29 14:38:51,811 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-29 14:38:51,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-29 14:38:51,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-29 14:38:51,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-29 14:38:51,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-29 14:38:51,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-29 14:38:51,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-29 14:38:51,812 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-29 14:38:51,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-29 14:38:51,812 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-29 14:38:51,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-29 14:38:51,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-29 14:38:51,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-29 14:38:51,813 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-29 14:38:51,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-29 14:38:51,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-29 14:38:51,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-29 14:38:51,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-29 14:38:51,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-29 14:38:51,814 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-09-29 14:38:51,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-29 14:38:51,815 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-09-29 14:38:51,815 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-09-29 14:38:51,815 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-29 14:38:52,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-29 14:38:52,358 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-29 14:38:52,363 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-29 14:38:52,364 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-09-29 14:38:52,365 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-09-29 14:38:52,366 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=06.bpl [2020-09-29 14:38:52,366 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=06.bpl' [2020-09-29 14:38:52,413 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-29 14:38:52,420 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-29 14:38:52,420 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-29 14:38:52,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-29 14:38:52,421 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-29 14:38:52,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example2_N=06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:52" (1/1) ... [2020-09-29 14:38:52,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example2_N=06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:52" (1/1) ... [2020-09-29 14:38:52,465 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-29 14:38:52,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-29 14:38:52,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-29 14:38:52,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-29 14:38:52,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example2_N=06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:52" (1/1) ... [2020-09-29 14:38:52,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example2_N=06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:52" (1/1) ... [2020-09-29 14:38:52,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example2_N=06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:52" (1/1) ... [2020-09-29 14:38:52,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example2_N=06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:52" (1/1) ... [2020-09-29 14:38:52,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example2_N=06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:52" (1/1) ... [2020-09-29 14:38:52,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example2_N=06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:52" (1/1) ... [2020-09-29 14:38:52,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example2_N=06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:52" (1/1) ... [2020-09-29 14:38:52,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-29 14:38:52,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-29 14:38:52,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-29 14:38:52,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-29 14:38:52,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example2_N=06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-29 14:38:52,585 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2020-09-29 14:38:52,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2020-09-29 14:38:52,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2020-09-29 14:38:52,586 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2020-09-29 14:38:52,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2020-09-29 14:38:52,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2020-09-29 14:38:52,586 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2020-09-29 14:38:52,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2020-09-29 14:38:52,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2020-09-29 14:38:52,587 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-09-29 14:38:52,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-29 14:38:52,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-29 14:38:52,588 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2020-09-29 14:38:52,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2020-09-29 14:38:52,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2020-09-29 14:38:52,589 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2020-09-29 14:38:52,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2020-09-29 14:38:52,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2020-09-29 14:38:52,589 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2020-09-29 14:38:52,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2020-09-29 14:38:52,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2020-09-29 14:38:52,591 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-29 14:38:52,794 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-29 14:38:52,795 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-29 14:38:52,800 INFO L202 PluginConnector]: Adding new model example2_N=06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.09 02:38:52 BoogieIcfgContainer [2020-09-29 14:38:52,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-29 14:38:52,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-29 14:38:52,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-29 14:38:52,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-29 14:38:52,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example2_N=06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:52" (1/2) ... [2020-09-29 14:38:52,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea6f17d and model type example2_N=06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.09 02:38:52, skipping insertion in model container [2020-09-29 14:38:52,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example2_N=06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.09 02:38:52" (2/2) ... [2020-09-29 14:38:52,812 INFO L109 eAbstractionObserver]: Analyzing ICFG example2_N=06.bpl [2020-09-29 14:38:52,842 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-29 14:38:52,861 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-29 14:38:52,863 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-29 14:38:53,028 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-09-29 14:38:53,055 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-29 14:38:53,056 INFO L376 AbstractCegarLoop]: Hoare is false [2020-09-29 14:38:53,056 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-29 14:38:53,056 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-29 14:38:53,056 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-29 14:38:53,056 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-29 14:38:53,057 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-29 14:38:53,057 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-29 14:38:53,072 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 47 places, 34 transitions, 116 flow [2020-09-29 14:38:53,111 INFO L129 PetriNetUnfolder]: 6/28 cut-off events. [2020-09-29 14:38:53,111 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-09-29 14:38:53,118 INFO L80 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 28 events. 6/28 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2020-09-29 14:38:53,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 34 transitions, 116 flow [2020-09-29 14:38:53,126 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 26 transitions, 88 flow [2020-09-29 14:38:53,142 INFO L129 PetriNetUnfolder]: 6/25 cut-off events. [2020-09-29 14:38:53,143 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-09-29 14:38:53,143 INFO L245 CegarLoopForPetriNet]: Found error trace [2020-09-29 14:38:53,144 INFO L253 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-29 14:38:53,145 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2020-09-29 14:38:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-29 14:38:53,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2037678283, now seen corresponding path program 1 times [2020-09-29 14:38:53,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-09-29 14:38:53,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736812806] [2020-09-29 14:38:53,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-09-29 14:38:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-29 14:38:53,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2020-09-29 14:38:53,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-29 14:38:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-29 14:38:53,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-09-29 14:38:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-29 14:38:53,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736812806] [2020-09-29 14:38:53,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-09-29 14:38:53,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2020-09-29 14:38:53,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540991648] [2020-09-29 14:38:53,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-29 14:38:53,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-09-29 14:38:53,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-29 14:38:53,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-29 14:38:53,353 INFO L503 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 34 [2020-09-29 14:38:53,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 26 transitions, 88 flow. Second operand 3 states. [2020-09-29 14:38:53,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-09-29 14:38:53,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 34 [2020-09-29 14:38:53,356 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-09-29 14:38:53,407 INFO L129 PetriNetUnfolder]: 6/25 cut-off events. [2020-09-29 14:38:53,408 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-09-29 14:38:53,409 INFO L80 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 25 events. 6/25 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 1/26 useless extension candidates. Maximal degree in co-relation 33. Up to 7 conditions per place. [2020-09-29 14:38:53,410 INFO L132 encePairwiseOnDemand]: 32/34 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2020-09-29 14:38:53,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 25 transitions, 100 flow [2020-09-29 14:38:53,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-29 14:38:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-09-29 14:38:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2020-09-29 14:38:53,428 INFO L550 CegarLoopForPetriNet]: DFA transition density 0.8137254901960784 [2020-09-29 14:38:53,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2020-09-29 14:38:53,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2020-09-29 14:38:53,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-09-29 14:38:53,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2020-09-29 14:38:53,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-09-29 14:38:53,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-09-29 14:38:53,445 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-09-29 14:38:53,448 INFO L185 Difference]: Start difference. First operand has 39 places, 26 transitions, 88 flow. Second operand 3 states and 83 transitions. [2020-09-29 14:38:53,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 25 transitions, 100 flow [2020-09-29 14:38:53,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 25 transitions, 76 flow, removed 0 selfloop flow, removed 12 redundant places. [2020-09-29 14:38:53,457 INFO L241 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2020-09-29 14:38:53,460 INFO L321 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2020-09-29 14:38:53,462 INFO L337 CegarLoopForPetriNet]: 39 programPoint places, -11 predicate places. [2020-09-29 14:38:53,462 INFO L479 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2020-09-29 14:38:53,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-29 14:38:53,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-09-29 14:38:53,684 INFO L202 PluginConnector]: Adding new model example2_N=06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.09 02:38:53 BasicIcfg [2020-09-29 14:38:53,684 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-29 14:38:53,688 INFO L168 Benchmark]: Toolchain (without parser) took 1272.08 ms. Allocated memory is still 189.3 MB. Free memory was 168.7 MB in the beginning and 115.3 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 14.2 GB. [2020-09-29 14:38:53,688 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 189.3 MB. Free memory is still 170.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-09-29 14:38:53,689 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.61 ms. Allocated memory is still 189.3 MB. Free memory was 167.5 MB in the beginning and 166.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.2 GB. [2020-09-29 14:38:53,690 INFO L168 Benchmark]: Boogie Preprocessor took 28.40 ms. Allocated memory is still 189.3 MB. Free memory was 166.2 MB in the beginning and 164.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.2 GB. [2020-09-29 14:38:53,691 INFO L168 Benchmark]: RCFGBuilder took 305.05 ms. Allocated memory is still 189.3 MB. Free memory was 164.9 MB in the beginning and 153.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 14.2 GB. [2020-09-29 14:38:53,692 INFO L168 Benchmark]: TraceAbstraction took 883.29 ms. Allocated memory is still 189.3 MB. Free memory was 152.4 MB in the beginning and 115.3 MB in the end (delta: 37.1 MB). Peak memory consumption was 37.1 MB. Max. memory is 14.2 GB. [2020-09-29 14:38:53,696 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 189.3 MB. Free memory is still 170.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 45.61 ms. Allocated memory is still 189.3 MB. Free memory was 167.5 MB in the beginning and 166.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.40 ms. Allocated memory is still 189.3 MB. Free memory was 166.2 MB in the beginning and 164.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.2 GB. * RCFGBuilder took 305.05 ms. Allocated memory is still 189.3 MB. Free memory was 164.9 MB in the beginning and 153.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 883.29 ms. Allocated memory is still 189.3 MB. Free memory was 152.4 MB in the beginning and 115.3 MB in the end (delta: 37.1 MB). Peak memory consumption was 37.1 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 22]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 6 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 2166 SizeOfPredicates, 0 NumberOfNonLiveVariables, 95 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...