/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-POR-NewStatesSleep-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-28 20:13:48,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 20:13:48,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 20:13:49,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-28 20:13:49,053 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-POR-NewStatesSleep-NoLbe.epf [2022-01-28 20:13:49,084 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 20:13:49,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 20:13:49,085 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 20:13:49,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 20:13:49,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 20:13:49,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 20:13:49,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 20:13:49,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 20:13:49,086 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 20:13:49,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 20:13:49,086 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 20:13:49,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 20:13:49,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 20:13:49,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 20:13:49,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 20:13:49,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 20:13:49,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 20:13:49,087 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 20:13:49,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 20:13:49,087 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 20:13:49,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 20:13:49,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 20:13:49,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 20:13:49,087 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 20:13:49,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 20:13:49,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 20:13:49,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 20:13:49,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 20:13:49,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 20:13:49,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 20:13:49,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 20:13:49,088 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 20:13:49,088 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2022-01-28 20:13:49,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 20:13:49,088 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_NEW_STATES [2022-01-28 20:13:49,088 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 20:13:49,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 20:13:49,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 20:13:49,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 20:13:49,278 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 20:13:49,278 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 20:13:49,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl [2022-01-28 20:13:49,279 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl' [2022-01-28 20:13:49,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 20:13:49,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 20:13:49,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 20:13:49,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 20:13:49,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 20:13:49,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 08:13:49" (1/1) ... [2022-01-28 20:13:49,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 08:13:49" (1/1) ... [2022-01-28 20:13:49,327 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 20:13:49,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 20:13:49,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 20:13:49,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 20:13:49,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 20:13:49,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 08:13:49" (1/1) ... [2022-01-28 20:13:49,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 08:13:49" (1/1) ... [2022-01-28 20:13:49,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 08:13:49" (1/1) ... [2022-01-28 20:13:49,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 08:13:49" (1/1) ... [2022-01-28 20:13:49,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 08:13:49" (1/1) ... [2022-01-28 20:13:49,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 08:13:49" (1/1) ... [2022-01-28 20:13:49,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 08:13:49" (1/1) ... [2022-01-28 20:13:49,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 20:13:49,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 20:13:49,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 20:13:49,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 20:13:49,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 08:13:49" (1/1) ... [2022-01-28 20:13:49,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 20:13:49,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 20:13:49,361 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) [2022-01-28 20:13:49,372 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 [2022-01-28 20:13:49,393 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2022-01-28 20:13:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2022-01-28 20:13:49,393 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2022-01-28 20:13:49,393 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2022-01-28 20:13:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2022-01-28 20:13:49,394 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2022-01-28 20:13:49,394 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 20:13:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 20:13:49,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 20:13:49,394 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-28 20:13:49,430 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 20:13:49,431 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 20:13:49,488 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 20:13:49,506 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 20:13:49,506 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-28 20:13:49,508 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 08:13:49 BoogieIcfgContainer [2022-01-28 20:13:49,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 20:13:49,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 20:13:49,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 20:13:49,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 20:13:49,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 08:13:49" (1/2) ... [2022-01-28 20:13:49,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5279574e and model type PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 08:13:49, skipping insertion in model container [2022-01-28 20:13:49,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 08:13:49" (2/2) ... [2022-01-28 20:13:49,527 INFO L111 eAbstractionObserver]: Analyzing ICFG PetersonWithBug.bpl [2022-01-28 20:13:49,531 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 20:13:49,531 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 20:13:49,531 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-28 20:13:49,531 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 20:13:49,549 WARN L322 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-28 20:13:49,550 WARN L322 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-28 20:13:49,551 WARN L322 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-28 20:13:49,552 WARN L322 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_b not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-28 20:13:49,552 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-28 20:13:49,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-01-28 20:13:49,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 20:13:49,599 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-01-28 20:13:49,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2022-01-28 20:13:49,631 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 20:13:49,636 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=PARTIAL_ORDER_FA, 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 [2022-01-28 20:13:49,636 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-01-28 20:13:49,667 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting Process0Err0ASSERT_VIOLATIONASSERT === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION (and 2 more)] === [2022-01-28 20:13:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 20:13:49,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2134110811, now seen corresponding path program 1 times [2022-01-28 20:13:49,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 20:13:49,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209044648] [2022-01-28 20:13:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 20:13:49,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 20:13:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 20:13:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 20:13:49,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 20:13:49,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209044648] [2022-01-28 20:13:49,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209044648] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 20:13:49,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 20:13:49,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-01-28 20:13:49,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807231861] [2022-01-28 20:13:49,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 20:13:49,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-28 20:13:49,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 20:13:49,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-28 20:13:49,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 20:13:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-28 20:13:49,808 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-01-28 20:13:49,809 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) [2022-01-28 20:13:49,809 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-01-28 20:13:49,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 20:13:49,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 20:13:49,880 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting Process1Err0ASSERT_VIOLATIONASSERT === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION (and 2 more)] === [2022-01-28 20:13:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 20:13:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash 776513442, now seen corresponding path program 1 times [2022-01-28 20:13:49,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 20:13:49,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744844064] [2022-01-28 20:13:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 20:13:49,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 20:13:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 20:13:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 20:13:49,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 20:13:49,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744844064] [2022-01-28 20:13:49,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744844064] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 20:13:49,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 20:13:49,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 20:13:49,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339427589] [2022-01-28 20:13:49,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 20:13:49,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 20:13:49,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 20:13:49,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 20:13:49,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 20:13:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-28 20:13:49,942 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-01-28 20:13:49,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-01-28 20:13:49,943 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-01-28 20:13:49,943 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-01-28 20:13:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 20:13:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 20:13:49,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-28 20:13:49,988 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting Process1Err0ASSERT_VIOLATIONASSERT === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION (and 2 more)] === [2022-01-28 20:13:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 20:13:49,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1337360468, now seen corresponding path program 1 times [2022-01-28 20:13:49,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 20:13:49,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226730591] [2022-01-28 20:13:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 20:13:49,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 20:13:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 20:13:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 20:13:50,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 20:13:50,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226730591] [2022-01-28 20:13:50,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226730591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 20:13:50,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 20:13:50,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 20:13:50,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102553780] [2022-01-28 20:13:50,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 20:13:50,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 20:13:50,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 20:13:50,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 20:13:50,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 20:13:50,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-28 20:13:50,029 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-01-28 20:13:50,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2022-01-28 20:13:50,030 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-01-28 20:13:50,030 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2022-01-28 20:13:50,030 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-01-28 20:13:50,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 20:13:50,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 20:13:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 20:13:50,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-28 20:13:50,079 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting Process1Err0ASSERT_VIOLATIONASSERT === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION (and 2 more)] === [2022-01-28 20:13:50,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 20:13:50,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1869394128, now seen corresponding path program 1 times [2022-01-28 20:13:50,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 20:13:50,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047411821] [2022-01-28 20:13:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 20:13:50,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 20:13:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-28 20:13:50,089 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-28 20:13:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-28 20:13:50,149 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-28 20:13:50,150 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-28 20:13:50,150 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location Process1Err0ASSERT_VIOLATIONASSERT (5 of 6 remaining) [2022-01-28 20:13:50,155 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location Process0Err0ASSERT_VIOLATIONASSERT (4 of 6 remaining) [2022-01-28 20:13:50,155 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location Process1Err0ASSERT_VIOLATIONASSERT (3 of 6 remaining) [2022-01-28 20:13:50,156 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 6 remaining) [2022-01-28 20:13:50,159 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 6 remaining) [2022-01-28 20:13:50,160 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location Process0Err0ASSERT_VIOLATIONASSERT (0 of 6 remaining) [2022-01-28 20:13:50,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-28 20:13:50,168 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-01-28 20:13:50,172 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-28 20:13:50,172 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-28 20:13:50,183 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 08:13:50 BasicIcfg [2022-01-28 20:13:50,183 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-28 20:13:50,184 INFO L158 Benchmark]: Toolchain (without parser) took 887.27ms. Allocated memory was 189.8MB in the beginning and 267.4MB in the end (delta: 77.6MB). Free memory was 146.7MB in the beginning and 236.2MB in the end (delta: -89.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 20:13:50,184 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 189.8MB. Free memory is still 147.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 20:13:50,184 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.56ms. Allocated memory is still 189.8MB. Free memory was 146.7MB in the beginning and 145.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-28 20:13:50,184 INFO L158 Benchmark]: Boogie Preprocessor took 10.50ms. Allocated memory is still 189.8MB. Free memory was 145.1MB in the beginning and 144.3MB in the end (delta: 844.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 20:13:50,185 INFO L158 Benchmark]: RCFGBuilder took 167.51ms. Allocated memory is still 189.8MB. Free memory was 144.1MB in the beginning and 136.3MB in the end (delta: 7.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-28 20:13:50,185 INFO L158 Benchmark]: TraceAbstraction took 674.24ms. Allocated memory was 189.8MB in the beginning and 267.4MB in the end (delta: 77.6MB). Free memory was 135.7MB in the beginning and 236.2MB in the end (delta: -100.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 20:13:50,186 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 0.10ms. Allocated memory is still 189.8MB. Free memory is still 147.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 31.56ms. Allocated memory is still 189.8MB. Free memory was 146.7MB in the beginning and 145.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.50ms. Allocated memory is still 189.8MB. Free memory was 145.1MB in the beginning and 144.3MB in the end (delta: 844.6kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 167.51ms. Allocated memory is still 189.8MB. Free memory was 144.1MB in the beginning and 136.3MB in the end (delta: 7.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 674.24ms. Allocated memory was 189.8MB in the beginning and 267.4MB in the end (delta: 77.6MB). Free memory was 135.7MB in the beginning and 236.2MB in the end (delta: -100.5MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 300, positive: 231, positive conditional: 231, positive unconditional: 0, negative: 69, negative conditional: 69, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 242, positive: 231, positive conditional: 231, positive unconditional: 0, negative: 11, negative conditional: 11, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 242, positive: 231, positive conditional: 231, positive unconditional: 0, negative: 11, negative conditional: 11, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 263, positive: 231, positive conditional: 211, positive unconditional: 20, negative: 32, negative conditional: 21, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 263, positive: 231, positive conditional: 41, positive unconditional: 190, negative: 32, negative conditional: 4, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 263, positive: 231, positive conditional: 41, positive unconditional: 190, negative: 32, negative conditional: 4, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 110, positive: 100, positive conditional: 20, positive unconditional: 80, negative: 10, negative conditional: 4, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 110, positive: 95, positive conditional: 0, positive unconditional: 95, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 15, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 10, negative conditional: 4, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 49, positive: 31, positive conditional: 0, positive unconditional: 31, negative: 18, negative conditional: 6, negative unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 263, positive: 131, positive conditional: 21, positive unconditional: 110, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 110, unknown conditional: 24, unknown unconditional: 86] , Statistics on independence cache: Total cache size (in pairs): 110, Positive cache size: 100, Positive conditional cache size: 20, Positive unconditional cache size: 80, Negative cache size: 10, Negative conditional cache size: 4, Negative unconditional cache size: 6, Eliminated conditions: 187, Maximal queried relation: 3, Independence queries for same thread: 58 - 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: 59]: 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] [L38] 1 flag0 := 1; VAL [critical=0, flag0=1, turn=1] [L27] FORK 0 fork 1 Process1(); VAL [critical=0, flag0=1, turn=1] [L56] 2 flag1 := 1; VAL [critical=0, flag0=1, flag1=1, turn=1] [L57] 2 turn := 0; 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] [L40] 1 assert critical == 0; VAL [critical=0, flag0=1, flag1=1, turn=0] [L41] 1 critical := 1; VAL [critical=1, flag0=1, flag1=1, turn=0] [L42] 1 critical := 0; VAL [critical=0, flag0=1, flag1=1, turn=0] [L43] 1 flag0 := 0; VAL [critical=0, flag0=0, flag1=1, turn=0] [L37] 1 turn := 1; VAL [critical=0, flag0=0, flag1=1, turn=1] [L38] 1 flag0 := 1; VAL [critical=0, flag0=1, flag1=1, turn=1] [L58] 2 assume flag0 == 0 || turn == 1; VAL [critical=0, flag0=1, flag1=1, turn=1] [L59] 2 assert critical == 0; VAL [critical=0, flag0=1, flag1=1, turn=1] [L60] 2 critical := 1; VAL [critical=1, flag0=1, flag1=1, turn=1] [L61] 2 critical := 0; VAL [critical=0, flag0=1, flag1=1, turn=1] [L62] 2 flag1 := 0; VAL [critical=0, flag0=1, flag1=0, turn=1] [L39] 1 assume flag1 == 0 || turn == 0; VAL [critical=0, flag0=1, flag1=0, turn=1] [L40] 1 assert critical == 0; VAL [critical=0, flag0=1, flag1=0, turn=1] [L41] 1 critical := 1; VAL [critical=1, flag0=1, flag1=0, turn=1] [L42] 1 critical := 0; VAL [critical=0, flag0=1, flag1=0, turn=1] [L43] 1 flag0 := 0; VAL [critical=0, flag0=0, flag1=0, turn=1] [L37] 1 turn := 1; VAL [critical=0, flag0=0, flag1=0, turn=1] [L56] 2 flag1 := 1; VAL [critical=0, flag0=0, flag1=1, turn=1] [L57] 2 turn := 0; VAL [critical=0, flag0=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] [L40] 1 assert critical == 0; VAL [critical=0, flag0=1, flag1=1, turn=0] [L41] 1 critical := 1; VAL [critical=1, flag0=1, flag1=1, turn=0] [L59] 2 assert critical == 0; VAL [critical=1, flag0=1, flag1=1, turn=0] - UnprovableResult [Line: 40]: 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: 0.6s, OverallIterations: 4, TraceHistogramMax: 0, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.2s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 11, 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, 0.1s InterpolantComputationTime, 73 NumberOfCodeBlocks, 73 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 92 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 5/5 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! [2022-01-28 20:13:50,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Forceful destruction successful, exit code 0 [2022-01-28 20:13:50,423 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...