/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-16 13:26:55,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-16 13:26:55,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-16 13:26:55,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-16 13:26:55,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf [2022-02-16 13:26:55,751 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-16 13:26:55,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-16 13:26:55,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-16 13:26:55,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-16 13:26:55,752 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-16 13:26:55,753 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-16 13:26:55,753 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-16 13:26:55,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-16 13:26:55,753 INFO L138 SettingsManager]: * Use SBE=true [2022-02-16 13:26:55,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-16 13:26:55,754 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-16 13:26:55,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-16 13:26:55,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-16 13:26:55,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-16 13:26:55,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-16 13:26:55,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-16 13:26:55,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-16 13:26:55,754 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-16 13:26:55,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-16 13:26:55,755 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-16 13:26:55,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-16 13:26:55,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-16 13:26:55,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-16 13:26:55,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-16 13:26:55,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-16 13:26:55,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 13:26:55,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-16 13:26:55,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-16 13:26:55,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-16 13:26:55,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-16 13:26:55,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-16 13:26:55,756 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-16 13:26:55,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-16 13:26:55,756 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-16 13:26:55,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-16 13:26:55,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-16 13:26:55,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-16 13:26:55,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-16 13:26:55,988 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-16 13:26:55,990 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-16 13:26:55,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl [2022-02-16 13:26:55,992 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl' [2022-02-16 13:26:56,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-16 13:26:56,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-16 13:26:56,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-16 13:26:56,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-16 13:26:56,020 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-16 13:26:56,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:26:56" (1/1) ... [2022-02-16 13:26:56,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:26:56" (1/1) ... [2022-02-16 13:26:56,042 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-16 13:26:56,044 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-16 13:26:56,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-16 13:26:56,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-16 13:26:56,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-16 13:26:56,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:26:56" (1/1) ... [2022-02-16 13:26:56,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:26:56" (1/1) ... [2022-02-16 13:26:56,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:26:56" (1/1) ... [2022-02-16 13:26:56,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:26:56" (1/1) ... [2022-02-16 13:26:56,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:26:56" (1/1) ... [2022-02-16 13:26:56,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:26:56" (1/1) ... [2022-02-16 13:26:56,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:26:56" (1/1) ... [2022-02-16 13:26:56,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-16 13:26:56,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-16 13:26:56,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-16 13:26:56,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-16 13:26:56,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:26:56" (1/1) ... [2022-02-16 13:26:56,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 13:26:56,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:26:56,101 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-16 13:26:56,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-16 13:26:56,134 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2022-02-16 13:26:56,134 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2022-02-16 13:26:56,134 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2022-02-16 13:26:56,134 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2022-02-16 13:26:56,135 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2022-02-16 13:26:56,135 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2022-02-16 13:26:56,135 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-16 13:26:56,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-16 13:26:56,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-16 13:26:56,136 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-16 13:26:56,176 INFO L234 CfgBuilder]: Building ICFG [2022-02-16 13:26:56,177 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-16 13:26:56,257 INFO L275 CfgBuilder]: Performing block encoding [2022-02-16 13:26:56,266 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-16 13:26:56,267 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-16 13:26:56,268 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:26:56 BoogieIcfgContainer [2022-02-16 13:26:56,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-16 13:26:56,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-16 13:26:56,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-16 13:26:56,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-16 13:26:56,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:26:56" (1/2) ... [2022-02-16 13:26:56,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c74313 and model type PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:26:56, skipping insertion in model container [2022-02-16 13:26:56,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:26:56" (2/2) ... [2022-02-16 13:26:56,281 INFO L111 eAbstractionObserver]: Analyzing ICFG PetersonWithBug.bpl [2022-02-16 13:26:56,289 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-16 13:26:56,290 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-16 13:26:56,290 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-02-16 13:26:56,290 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-16 13:26:56,333 WARN L322 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-16 13:26:56,334 WARN L322 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-16 13:26:56,335 WARN L322 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-16 13:26:56,336 WARN L322 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_b not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-16 13:26:56,336 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-02-16 13:26:56,386 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 13:26:56,394 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-16 13:26:56,394 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-02-16 13:26:56,404 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 62 flow [2022-02-16 13:26:56,454 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 204 states, 201 states have (on average 2.4975124378109452) internal successors, (502), 203 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:27:09,285 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 714082 transitions and produced 278368 states. [2022-02-16 13:27:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 278368 states, 240288 states have (on average 1.6068010054601145) internal successors, (386095), 278367 states have internal predecessors, (386095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:27:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-02-16 13:27:10,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:27:10,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-02-16 13:27:10,820 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting Process0Err0ASSERT_VIOLATIONASSERT === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION (and 2 more)] === [2022-02-16 13:27:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:27:10,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2134110811, now seen corresponding path program 1 times [2022-02-16 13:27:10,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:27:10,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573461482] [2022-02-16 13:27:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:27:10,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:27:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:27:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:27:10,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:27:10,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573461482] [2022-02-16 13:27:10,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573461482] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:27:10,967 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:27:10,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-02-16 13:27:10,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737754537] [2022-02-16 13:27:10,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:27:10,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-16 13:27:10,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:27:11,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-16 13:27:11,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 13:27:12,851 INFO L87 Difference]: Start difference. First operand has 278368 states, 240288 states have (on average 1.6068010054601145) internal successors, (386095), 278367 states have internal predecessors, (386095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:27:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:27:15,842 INFO L93 Difference]: Finished difference Result 159923 states and 229669 transitions. [2022-02-16 13:27:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-16 13:27:15,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-02-16 13:27:15,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:27:16,727 INFO L225 Difference]: With dead ends: 159923 [2022-02-16 13:27:16,728 INFO L226 Difference]: Without dead ends: 155017 [2022-02-16 13:27:16,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 13:27:16,735 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:27:16,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:27:17,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155017 states. [2022-02-16 13:27:19,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155017 to 3555. [2022-02-16 13:27:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3555 states have (on average 1.6233473980309423) internal successors, (5771), 3554 states have internal predecessors, (5771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:27:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 5771 transitions. [2022-02-16 13:27:19,200 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 5771 transitions. Word has length 6 [2022-02-16 13:27:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:27:19,201 INFO L470 AbstractCegarLoop]: Abstraction has 3555 states and 5771 transitions. [2022-02-16 13:27:19,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:27:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 5771 transitions. [2022-02-16 13:27:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:27:19,214 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:27:19,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:27:19,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-16 13:27:19,215 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting Process1Err0ASSERT_VIOLATIONASSERT === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION (and 2 more)] === [2022-02-16 13:27:19,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:27:19,216 INFO L85 PathProgramCache]: Analyzing trace with hash 579567833, now seen corresponding path program 1 times [2022-02-16 13:27:19,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:27:19,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814964008] [2022-02-16 13:27:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:27:19,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:27:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:27:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:27:19,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:27:19,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814964008] [2022-02-16 13:27:19,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814964008] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:27:19,327 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:27:19,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 13:27:19,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122339457] [2022-02-16 13:27:19,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:27:19,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 13:27:19,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:27:19,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 13:27:19,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:27:19,331 INFO L87 Difference]: Start difference. First operand 3555 states and 5771 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:27:19,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:27:19,388 INFO L93 Difference]: Finished difference Result 3505 states and 5509 transitions. [2022-02-16 13:27:19,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 13:27:19,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:27:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:27:19,422 INFO L225 Difference]: With dead ends: 3505 [2022-02-16 13:27:19,423 INFO L226 Difference]: Without dead ends: 2847 [2022-02-16 13:27:19,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:27:19,425 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:27:19,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 49 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:27:19,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2022-02-16 13:27:19,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2063. [2022-02-16 13:27:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2061 states have (on average 1.4764677341096555) internal successors, (3043), 2062 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:27:19,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 3043 transitions. [2022-02-16 13:27:19,501 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 3043 transitions. Word has length 12 [2022-02-16 13:27:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:27:19,502 INFO L470 AbstractCegarLoop]: Abstraction has 2063 states and 3043 transitions. [2022-02-16 13:27:19,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:27:19,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 3043 transitions. [2022-02-16 13:27:19,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:27:19,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:27:19,503 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:27:19,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-16 13:27:19,515 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting Process0Err0ASSERT_VIOLATIONASSERT === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION (and 2 more)] === [2022-02-16 13:27:19,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:27:19,515 INFO L85 PathProgramCache]: Analyzing trace with hash 60579983, now seen corresponding path program 1 times [2022-02-16 13:27:19,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:27:19,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662156037] [2022-02-16 13:27:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:27:19,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:27:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-16 13:27:19,540 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-16 13:27:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-16 13:27:19,591 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-16 13:27:19,592 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-16 13:27:19,596 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location Process0Err0ASSERT_VIOLATIONASSERT (5 of 6 remaining) [2022-02-16 13:27:19,602 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location Process0Err0ASSERT_VIOLATIONASSERT (4 of 6 remaining) [2022-02-16 13:27:19,602 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location Process1Err0ASSERT_VIOLATIONASSERT (3 of 6 remaining) [2022-02-16 13:27:19,602 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 6 remaining) [2022-02-16 13:27:19,603 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 6 remaining) [2022-02-16 13:27:19,603 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location Process1Err0ASSERT_VIOLATIONASSERT (0 of 6 remaining) [2022-02-16 13:27:19,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-16 13:27:19,605 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-02-16 13:27:19,614 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-16 13:27:19,614 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-16 13:27:19,626 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 01:27:19 BasicIcfg [2022-02-16 13:27:19,626 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-16 13:27:19,629 INFO L158 Benchmark]: Toolchain (without parser) took 23608.26ms. Allocated memory was 190.8MB in the beginning and 7.5GB in the end (delta: 7.3GB). Free memory was 155.5MB in the beginning and 6.3GB in the end (delta: -6.2GB). Peak memory consumption was 1.1GB. Max. memory is 8.0GB. [2022-02-16 13:27:19,630 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 190.8MB. Free memory is still 156.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-16 13:27:19,631 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.58ms. Allocated memory is still 190.8MB. Free memory was 155.5MB in the beginning and 154.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-16 13:27:19,631 INFO L158 Benchmark]: Boogie Preprocessor took 16.25ms. Allocated memory is still 190.8MB. Free memory was 154.0MB in the beginning and 153.0MB in the end (delta: 946.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-16 13:27:19,631 INFO L158 Benchmark]: RCFGBuilder took 207.64ms. Allocated memory is still 190.8MB. Free memory was 153.0MB in the beginning and 144.2MB in the end (delta: 8.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-16 13:27:19,634 INFO L158 Benchmark]: TraceAbstraction took 23354.40ms. Allocated memory was 190.8MB in the beginning and 7.5GB in the end (delta: 7.3GB). Free memory was 143.7MB in the beginning and 6.3GB in the end (delta: -6.2GB). Peak memory consumption was 1.1GB. Max. memory is 8.0GB. [2022-02-16 13:27:19,635 INFO L339 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 0.14ms. Allocated memory is still 190.8MB. Free memory is still 156.6MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.58ms. Allocated memory is still 190.8MB. Free memory was 155.5MB in the beginning and 154.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.25ms. Allocated memory is still 190.8MB. Free memory was 154.0MB in the beginning and 153.0MB in the end (delta: 946.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 207.64ms. Allocated memory is still 190.8MB. Free memory was 153.0MB in the beginning and 144.2MB in the end (delta: 8.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 23354.40ms. Allocated memory was 190.8MB in the beginning and 7.5GB in the end (delta: 7.3GB). Free memory was 143.7MB in the beginning and 6.3GB in the end (delta: -6.2GB). Peak memory consumption was 1.1GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 40]: assertion can be violated assertion can be violated We found a FailurePath: [L25] 0 critical := 0; VAL [critical=0] [L26] FORK 0 fork 0 Process0(); VAL [critical=0] [L37] 1 turn := 1; VAL [critical=0, turn=1] [L27] FORK 0 fork 1 Process1(); VAL [critical=0, turn=1] [L56] 2 flag1 := 1; VAL [critical=0, flag1=1, turn=1] [L57] 2 turn := 0; VAL [critical=0, flag1=1, turn=0] [L58] 2 assume flag0 == 0 || turn == 1; VAL [critical=0, flag0=0, flag1=1, turn=0] [L38] 1 flag0 := 1; VAL [critical=0, flag0=1, flag1=1, turn=0] [L39] 1 assume flag1 == 0 || turn == 0; VAL [critical=0, flag0=1, flag1=1, turn=0] [L59] 2 assert critical == 0; VAL [critical=0, flag0=1, flag1=1, turn=0] [L60] 2 critical := 1; VAL [critical=1, flag0=1, flag1=1, turn=0] [L40] 1 assert critical == 0; VAL [critical=1, flag0=1, flag1=1, turn=0] - UnprovableResult [Line: 59]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: Not analyzed. - UnprovableResult [Line: 26]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 26]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 47 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 23.2s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 1.5s, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 12.9s, PartialOrderReductionTime: 12.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 23 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 72 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 29 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23 IncrementalHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 47 mSDtfsCounter, 23 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=278368occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 2 MinimizatonAttempts, 152246 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 44 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 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 incorrect! [2022-02-16 13:27:19,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...