/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=01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b665a9c [2020-09-29 14:38:51,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-29 14:38:51,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-29 14:38:51,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-29 14:38:51,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-29 14:38:51,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-29 14:38:51,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-29 14:38:51,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-29 14:38:51,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-29 14:38:51,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-29 14:38:51,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-29 14:38:51,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-29 14:38:51,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-29 14:38:51,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-29 14:38:51,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-29 14:38:51,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-29 14:38:51,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-29 14:38:51,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-29 14:38:51,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-29 14:38:51,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-29 14:38:51,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-29 14:38:51,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-29 14:38:51,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-29 14:38:51,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-29 14:38:51,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-29 14:38:51,230 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 14:38:51,253 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-29 14:38:51,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-29 14:38:51,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-29 14:38:51,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-29 14:38:51,255 INFO L138 SettingsManager]: * Use SBE=true [2020-09-29 14:38:51,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-29 14:38:51,255 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-29 14:38:51,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-29 14:38:51,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-29 14:38:51,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-29 14:38:51,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-29 14:38:51,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-29 14:38:51,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-29 14:38:51,257 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-29 14:38:51,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-29 14:38:51,257 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-29 14:38:51,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-29 14:38:51,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-29 14:38:51,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-29 14:38:51,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-29 14:38:51,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-29 14:38:51,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-29 14:38:51,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-29 14:38:51,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-29 14:38:51,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-29 14:38:51,259 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-09-29 14:38:51,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-29 14:38:51,260 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-09-29 14:38:51,260 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-09-29 14:38:51,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-29 14:38:51,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-29 14:38:51,820 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-29 14:38:51,824 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-29 14:38:51,825 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-09-29 14:38:51,826 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-09-29 14:38:51,827 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=01.bpl [2020-09-29 14:38:51,827 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=01.bpl' [2020-09-29 14:38:51,867 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-29 14:38:51,873 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-29 14:38:51,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-29 14:38:51,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-29 14:38:51,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-29 14:38:51,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example2_N=01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:51" (1/1) ... [2020-09-29 14:38:51,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example2_N=01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:51" (1/1) ... [2020-09-29 14:38:51,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-29 14:38:51,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-29 14:38:51,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-29 14:38:51,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-29 14:38:51,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example2_N=01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:51" (1/1) ... [2020-09-29 14:38:51,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example2_N=01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:51" (1/1) ... [2020-09-29 14:38:51,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example2_N=01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:51" (1/1) ... [2020-09-29 14:38:51,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example2_N=01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:51" (1/1) ... [2020-09-29 14:38:51,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example2_N=01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:51" (1/1) ... [2020-09-29 14:38:51,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example2_N=01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:51" (1/1) ... [2020-09-29 14:38:51,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example2_N=01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:51" (1/1) ... [2020-09-29 14:38:51,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-29 14:38:51,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-29 14:38:51,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-29 14:38:51,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-29 14:38:51,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example2_N=01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:51" (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 14:38:52,047 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2020-09-29 14:38:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2020-09-29 14:38:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2020-09-29 14:38:52,050 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-09-29 14:38:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-29 14:38:52,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-29 14:38:52,052 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 14:38:52,243 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-29 14:38:52,243 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-29 14:38:52,248 INFO L202 PluginConnector]: Adding new model example2_N=01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.09 02:38:52 BoogieIcfgContainer [2020-09-29 14:38:52,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-29 14:38:52,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-29 14:38:52,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-29 14:38:52,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-29 14:38:52,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example2_N=01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:38:51" (1/2) ... [2020-09-29 14:38:52,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae4fa61 and model type example2_N=01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.09 02:38:52, skipping insertion in model container [2020-09-29 14:38:52,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example2_N=01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.09 02:38:52" (2/2) ... [2020-09-29 14:38:52,261 INFO L109 eAbstractionObserver]: Analyzing ICFG example2_N=01.bpl [2020-09-29 14:38:52,274 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-29 14:38:52,285 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-29 14:38:52,286 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-29 14:38:52,344 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-29 14:38:52,372 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-29 14:38:52,372 INFO L376 AbstractCegarLoop]: Hoare is false [2020-09-29 14:38:52,372 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-29 14:38:52,373 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-29 14:38:52,373 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-29 14:38:52,373 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-29 14:38:52,373 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-29 14:38:52,374 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-29 14:38:52,387 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 12 places, 9 transitions, 26 flow [2020-09-29 14:38:52,415 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2020-09-29 14:38:52,415 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-29 14:38:52,421 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13 conditions, 8 events. 1/8 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 2. Up to 2 conditions per place. [2020-09-29 14:38:52,421 INFO L82 GeneralOperation]: Start removeDead. Operand has 12 places, 9 transitions, 26 flow [2020-09-29 14:38:52,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 9 places, 6 transitions, 18 flow [2020-09-29 14:38:52,432 INFO L129 PetriNetUnfolder]: 1/5 cut-off events. [2020-09-29 14:38:52,432 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-29 14:38:52,433 INFO L245 CegarLoopForPetriNet]: Found error trace [2020-09-29 14:38:52,434 INFO L253 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2020-09-29 14:38:52,434 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-29 14:38:52,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-29 14:38:52,443 INFO L82 PathProgramCache]: Analyzing trace with hash 41310270, now seen corresponding path program 1 times [2020-09-29 14:38:52,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-09-29 14:38:52,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187200865] [2020-09-29 14:38:52,459 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 14:38:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-29 14:38:52,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2020-09-29 14:38:52,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-29 14:38:52,546 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 14:38:52,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-09-29 14:38:52,552 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 14:38:52,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187200865] [2020-09-29 14:38:52,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-09-29 14:38:52,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2020-09-29 14:38:52,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772801346] [2020-09-29 14:38:52,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-29 14:38:52,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-09-29 14:38:52,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-29 14:38:52,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-29 14:38:52,594 INFO L503 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 9 [2020-09-29 14:38:52,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 9 places, 6 transitions, 18 flow. Second operand 3 states. [2020-09-29 14:38:52,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-09-29 14:38:52,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 9 [2020-09-29 14:38:52,601 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-09-29 14:38:52,627 INFO L129 PetriNetUnfolder]: 1/5 cut-off events. [2020-09-29 14:38:52,627 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-29 14:38:52,627 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13 conditions, 5 events. 1/5 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 1/6 useless extension candidates. Maximal degree in co-relation 3. Up to 2 conditions per place. [2020-09-29 14:38:52,629 INFO L132 encePairwiseOnDemand]: 7/9 looper letters, 0 selfloop transitions, 0 changer transitions 5/5 dead transitions. [2020-09-29 14:38:52,629 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 5 transitions, 20 flow [2020-09-29 14:38:52,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-29 14:38:52,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-09-29 14:38:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 18 transitions. [2020-09-29 14:38:52,651 INFO L550 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2020-09-29 14:38:52,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 18 transitions. [2020-09-29 14:38:52,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 18 transitions. [2020-09-29 14:38:52,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-09-29 14:38:52,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 18 transitions. [2020-09-29 14:38:52,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-09-29 14:38:52,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-09-29 14:38:52,666 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-09-29 14:38:52,669 INFO L185 Difference]: Start difference. First operand has 9 places, 6 transitions, 18 flow. Second operand 3 states and 18 transitions. [2020-09-29 14:38:52,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 5 transitions, 20 flow [2020-09-29 14:38:52,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 7 places, 5 transitions, 14 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-09-29 14:38:52,676 INFO L241 Difference]: Finished difference. Result has 7 places, 0 transitions, 0 flow [2020-09-29 14:38:52,680 INFO L321 CegarLoopForPetriNet]: {PETRI_ALPHABET=9, PETRI_DIFFERENCE_MINUEND_FLOW=10, PETRI_DIFFERENCE_MINUEND_PLACES=5, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=7, PETRI_TRANSITIONS=0} [2020-09-29 14:38:52,682 INFO L337 CegarLoopForPetriNet]: 9 programPoint places, -2 predicate places. [2020-09-29 14:38:52,682 INFO L479 AbstractCegarLoop]: Abstraction has has 7 places, 0 transitions, 0 flow [2020-09-29 14:38:52,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-29 14:38:52,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-09-29 14:38:52,906 INFO L202 PluginConnector]: Adding new model example2_N=01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.09 02:38:52 BasicIcfg [2020-09-29 14:38:52,906 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-29 14:38:52,910 INFO L168 Benchmark]: Toolchain (without parser) took 1039.07 ms. Allocated memory is still 250.1 MB. Free memory was 223.9 MB in the beginning and 185.6 MB in the end (delta: 38.4 MB). Peak memory consumption was 38.4 MB. Max. memory is 14.2 GB. [2020-09-29 14:38:52,911 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 250.1 MB. Free memory is still 223.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-09-29 14:38:52,911 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.83 ms. Allocated memory is still 250.1 MB. Free memory was 223.9 MB in the beginning and 221.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-09-29 14:38:52,912 INFO L168 Benchmark]: Boogie Preprocessor took 24.33 ms. Allocated memory is still 250.1 MB. Free memory was 221.4 MB in the beginning and 218.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-09-29 14:38:52,913 INFO L168 Benchmark]: RCFGBuilder took 307.29 ms. Allocated memory is still 250.1 MB. Free memory was 218.9 MB in the beginning and 208.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.2 GB. [2020-09-29 14:38:52,915 INFO L168 Benchmark]: TraceAbstraction took 656.16 ms. Allocated memory is still 250.1 MB. Free memory was 208.8 MB in the beginning and 185.6 MB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 14.2 GB. [2020-09-29 14:38:52,919 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 0.24 ms. Allocated memory is still 250.1 MB. Free memory is still 223.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 42.83 ms. Allocated memory is still 250.1 MB. Free memory was 223.9 MB in the beginning and 221.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 24.33 ms. Allocated memory is still 250.1 MB. Free memory was 221.4 MB in the beginning and 218.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 307.29 ms. Allocated memory is still 250.1 MB. Free memory was 218.9 MB in the beginning and 208.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.2 GB. * TraceAbstraction took 656.16 ms. Allocated memory is still 250.1 MB. Free memory was 208.8 MB in the beginning and 185.6 MB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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 2 procedures, 9 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: 0.5s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 1 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 96 SizeOfPredicates, 0 NumberOfNonLiveVariables, 10 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...