/usr/bin/java -Xmx16000000000 -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-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_mutex.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 03:45:50,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 03:45:50,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 03:45:50,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 03:45:50,218 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-FA-NoLbe.epf [2022-01-18 03:45:50,245 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 03:45:50,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 03:45:50,246 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 03:45:50,246 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 03:45:50,246 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 03:45:50,246 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 03:45:50,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 03:45:50,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 03:45:50,247 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 03:45:50,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 03:45:50,248 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 03:45:50,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 03:45:50,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 03:45:50,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 03:45:50,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 03:45:50,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 03:45:50,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 03:45:50,248 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 03:45:50,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 03:45:50,248 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 03:45:50,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 03:45:50,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 03:45:50,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 03:45:50,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 03:45:50,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 03:45:50,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 03:45:50,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 03:45:50,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 03:45:50,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 03:45:50,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 03:45:50,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 03:45:50,250 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 03:45:50,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 03:45:50,250 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 03:45:50,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 03:45:50,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 03:45:50,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 03:45:50,457 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 03:45:50,458 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 03:45:50,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_mutex.bpl [2022-01-18 03:45:50,459 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_mutex.bpl' [2022-01-18 03:45:50,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 03:45:50,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 03:45:50,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 03:45:50,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 03:45:50,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 03:45:50,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:45:50" (1/1) ... [2022-01-18 03:45:50,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:45:50" (1/1) ... [2022-01-18 03:45:50,494 INFO L137 Inliner]: procedures = 2, calls = 1, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 03:45:50,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 03:45:50,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 03:45:50,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 03:45:50,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 03:45:50,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:45:50" (1/1) ... [2022-01-18 03:45:50,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:45:50" (1/1) ... [2022-01-18 03:45:50,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:45:50" (1/1) ... [2022-01-18 03:45:50,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:45:50" (1/1) ... [2022-01-18 03:45:50,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:45:50" (1/1) ... [2022-01-18 03:45:50,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:45:50" (1/1) ... [2022-01-18 03:45:50,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:45:50" (1/1) ... [2022-01-18 03:45:50,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 03:45:50,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 03:45:50,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 03:45:50,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 03:45:50,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:45:50" (1/1) ... [2022-01-18 03:45:50,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 03:45:50,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 03:45:50,527 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) [2022-01-18 03:45:50,533 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 [2022-01-18 03:45:50,553 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 03:45:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 03:45:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 03:45:50,553 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2022-01-18 03:45:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-01-18 03:45:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-01-18 03:45:50,554 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 03:45:50,582 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 03:45:50,583 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 03:45:50,632 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 03:45:50,638 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 03:45:50,639 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-18 03:45:50,640 INFO L202 PluginConnector]: Adding new model fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:45:50 BoogieIcfgContainer [2022-01-18 03:45:50,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 03:45:50,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 03:45:50,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 03:45:50,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 03:45:50,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:45:50" (1/2) ... [2022-01-18 03:45:50,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44231ab3 and model type fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 03:45:50, skipping insertion in model container [2022-01-18 03:45:50,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_mutex.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:45:50" (2/2) ... [2022-01-18 03:45:50,648 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_mutex.bpl [2022-01-18 03:45:50,656 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 03:45:50,656 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 03:45:50,656 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 03:45:50,656 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 03:45:50,685 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-18 03:45:50,733 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 03:45:50,739 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, 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 [2022-01-18 03:45:50,739 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 03:45:50,746 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 11 places, 9 transitions, 23 flow [2022-01-18 03:45:50,758 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 16 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 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) [2022-01-18 03:45:50,760 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 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) [2022-01-18 03:45:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-01-18 03:45:50,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:45:50,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2022-01-18 03:45:50,765 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT] === [2022-01-18 03:45:50,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:45:50,770 INFO L85 PathProgramCache]: Analyzing trace with hash 47055, now seen corresponding path program 1 times [2022-01-18 03:45:50,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:45:50,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245180146] [2022-01-18 03:45:50,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:45:50,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:45:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:45:50,841 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-18 03:45:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:45:50,854 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-18 03:45:50,855 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-18 03:45:50,856 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 3 remaining) [2022-01-18 03:45:50,857 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 3 remaining) [2022-01-18 03:45:50,857 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 3 remaining) [2022-01-18 03:45:50,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 03:45:50,861 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-01-18 03:45:50,862 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-18 03:45:50,863 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-01-18 03:45:50,874 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-18 03:45:50,878 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 03:45:50,881 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, 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 [2022-01-18 03:45:50,881 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 03:45:50,882 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 15 transitions, 42 flow [2022-01-18 03:45:50,901 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 85 states, 77 states have (on average 2.8181818181818183) internal successors, (217), 84 states have internal predecessors, (217), 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) [2022-01-18 03:45:50,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 77 states have (on average 2.8181818181818183) internal successors, (217), 84 states have internal predecessors, (217), 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) [2022-01-18 03:45:50,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-01-18 03:45:50,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:45:50,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-01-18 03:45:50,902 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT] === [2022-01-18 03:45:50,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:45:50,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1925520, now seen corresponding path program 1 times [2022-01-18 03:45:50,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:45:50,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083861564] [2022-01-18 03:45:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:45:50,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:45:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:45:50,908 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-18 03:45:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:45:50,913 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-18 03:45:50,913 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-18 03:45:50,914 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 4 remaining) [2022-01-18 03:45:50,914 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (2 of 4 remaining) [2022-01-18 03:45:50,914 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 4 remaining) [2022-01-18 03:45:50,915 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 4 remaining) [2022-01-18 03:45:50,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 03:45:50,915 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-01-18 03:45:50,916 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-18 03:45:50,916 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-01-18 03:45:50,926 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-18 03:45:50,928 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 03:45:50,932 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, 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 [2022-01-18 03:45:50,932 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-18 03:45:50,933 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 63 flow [2022-01-18 03:45:50,969 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 434 states, 415 states have (on average 3.706024096385542) internal successors, (1538), 433 states have internal predecessors, (1538), 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) [2022-01-18 03:45:50,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 415 states have (on average 3.706024096385542) internal successors, (1538), 433 states have internal predecessors, (1538), 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) [2022-01-18 03:45:50,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-01-18 03:45:50,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:45:50,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-01-18 03:45:50,972 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 1 more)] === [2022-01-18 03:45:50,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:45:50,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2576729, now seen corresponding path program 1 times [2022-01-18 03:45:50,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:45:50,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673142831] [2022-01-18 03:45:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:45:50,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:45:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:45:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:45:51,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 03:45:51,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673142831] [2022-01-18 03:45:51,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673142831] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 03:45:51,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 03:45:51,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 03:45:51,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481270789] [2022-01-18 03:45:51,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 03:45:51,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 03:45:51,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 03:45:51,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 03:45:51,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 03:45:51,063 INFO L87 Difference]: Start difference. First operand has 434 states, 415 states have (on average 3.706024096385542) internal successors, (1538), 433 states have internal predecessors, (1538), 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 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-01-18 03:45:51,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 03:45:51,184 INFO L93 Difference]: Finished difference Result 1144 states and 3914 transitions. [2022-01-18 03:45:51,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 03:45:51,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-01-18 03:45:51,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 03:45:51,224 INFO L225 Difference]: With dead ends: 1144 [2022-01-18 03:45:51,224 INFO L226 Difference]: Without dead ends: 1126 [2022-01-18 03:45:51,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 03:45:51,227 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 03:45:51,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 03:45:51,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2022-01-18 03:45:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 1046. [2022-01-18 03:45:51,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1028 states have (on average 3.622568093385214) internal successors, (3724), 1045 states have internal predecessors, (3724), 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) [2022-01-18 03:45:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3724 transitions. [2022-01-18 03:45:51,354 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3724 transitions. Word has length 4 [2022-01-18 03:45:51,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 03:45:51,354 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 3724 transitions. [2022-01-18 03:45:51,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-01-18 03:45:51,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3724 transitions. [2022-01-18 03:45:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-01-18 03:45:51,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:45:51,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-01-18 03:45:51,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 03:45:51,355 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 1 more)] === [2022-01-18 03:45:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:45:51,356 INFO L85 PathProgramCache]: Analyzing trace with hash 79885586, now seen corresponding path program 1 times [2022-01-18 03:45:51,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:45:51,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884207212] [2022-01-18 03:45:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:45:51,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:45:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:45:51,359 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-18 03:45:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:45:51,361 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-18 03:45:51,361 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-18 03:45:51,362 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (4 of 5 remaining) [2022-01-18 03:45:51,362 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (3 of 5 remaining) [2022-01-18 03:45:51,363 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (2 of 5 remaining) [2022-01-18 03:45:51,363 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 5 remaining) [2022-01-18 03:45:51,363 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 5 remaining) [2022-01-18 03:45:51,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 03:45:51,363 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-01-18 03:45:51,363 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-18 03:45:51,363 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-01-18 03:45:51,369 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-18 03:45:51,370 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 03:45:51,370 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, 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 [2022-01-18 03:45:51,370 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-01-18 03:45:51,371 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 27 transitions, 86 flow [2022-01-18 03:45:51,443 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2183 states, 2141 states have (on average 4.6277440448388605) internal successors, (9908), 2182 states have internal predecessors, (9908), 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) [2022-01-18 03:45:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 2183 states, 2141 states have (on average 4.6277440448388605) internal successors, (9908), 2182 states have internal predecessors, (9908), 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) [2022-01-18 03:45:51,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-01-18 03:45:51,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:45:51,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-01-18 03:45:51,451 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 2 more)] === [2022-01-18 03:45:51,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:45:51,452 INFO L85 PathProgramCache]: Analyzing trace with hash 3412542, now seen corresponding path program 1 times [2022-01-18 03:45:51,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:45:51,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360044480] [2022-01-18 03:45:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:45:51,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:45:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:45:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:45:51,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 03:45:51,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360044480] [2022-01-18 03:45:51,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360044480] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 03:45:51,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 03:45:51,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 03:45:51,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408978913] [2022-01-18 03:45:51,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 03:45:51,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 03:45:51,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 03:45:51,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 03:45:51,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 03:45:51,494 INFO L87 Difference]: Start difference. First operand has 2183 states, 2141 states have (on average 4.6277440448388605) internal successors, (9908), 2182 states have internal predecessors, (9908), 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 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-01-18 03:45:51,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 03:45:51,633 INFO L93 Difference]: Finished difference Result 6134 states and 26562 transitions. [2022-01-18 03:45:51,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 03:45:51,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-01-18 03:45:51,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 03:45:51,676 INFO L225 Difference]: With dead ends: 6134 [2022-01-18 03:45:51,677 INFO L226 Difference]: Without dead ends: 6104 [2022-01-18 03:45:51,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 03:45:51,680 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 03:45:51,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 25 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 03:45:51,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6104 states. [2022-01-18 03:45:51,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6104 to 5838. [2022-01-18 03:45:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 5797 states have (on average 4.474038295670174) internal successors, (25936), 5837 states have internal predecessors, (25936), 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) [2022-01-18 03:45:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 25936 transitions. [2022-01-18 03:45:51,923 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 25936 transitions. Word has length 4 [2022-01-18 03:45:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 03:45:51,923 INFO L470 AbstractCegarLoop]: Abstraction has 5838 states and 25936 transitions. [2022-01-18 03:45:51,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-01-18 03:45:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 25936 transitions. [2022-01-18 03:45:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-18 03:45:51,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:45:51,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-18 03:45:51,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 03:45:51,926 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 2 more)] === [2022-01-18 03:45:51,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:45:51,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1014989095, now seen corresponding path program 1 times [2022-01-18 03:45:51,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:45:51,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004849854] [2022-01-18 03:45:51,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:45:51,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:45:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:45:51,936 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-18 03:45:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:45:51,944 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-18 03:45:51,944 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-18 03:45:51,945 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (5 of 6 remaining) [2022-01-18 03:45:51,945 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (4 of 6 remaining) [2022-01-18 03:45:51,945 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (3 of 6 remaining) [2022-01-18 03:45:51,945 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (2 of 6 remaining) [2022-01-18 03:45:51,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 6 remaining) [2022-01-18 03:45:51,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 6 remaining) [2022-01-18 03:45:51,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 03:45:51,946 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-01-18 03:45:51,947 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-18 03:45:51,947 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-01-18 03:45:51,962 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-18 03:45:51,963 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 03:45:51,964 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, 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 [2022-01-18 03:45:51,965 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-01-18 03:45:51,966 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 33 transitions, 111 flow [2022-01-18 03:45:52,349 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10932 states, 10843 states have (on average 5.5821267176980545) internal successors, (60527), 10931 states have internal predecessors, (60527), 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) [2022-01-18 03:45:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand has 10932 states, 10843 states have (on average 5.5821267176980545) internal successors, (60527), 10931 states have internal predecessors, (60527), 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) [2022-01-18 03:45:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-01-18 03:45:52,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:45:52,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-01-18 03:45:52,374 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 3 more)] === [2022-01-18 03:45:52,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:45:52,375 INFO L85 PathProgramCache]: Analyzing trace with hash 4433059, now seen corresponding path program 1 times [2022-01-18 03:45:52,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:45:52,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621180617] [2022-01-18 03:45:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:45:52,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:45:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:45:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:45:52,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 03:45:52,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621180617] [2022-01-18 03:45:52,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621180617] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 03:45:52,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 03:45:52,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 03:45:52,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901346184] [2022-01-18 03:45:52,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 03:45:52,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 03:45:52,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 03:45:52,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 03:45:52,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 03:45:52,414 INFO L87 Difference]: Start difference. First operand has 10932 states, 10843 states have (on average 5.5821267176980545) internal successors, (60527), 10931 states have internal predecessors, (60527), 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 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-01-18 03:45:52,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 03:45:52,985 INFO L93 Difference]: Finished difference Result 31652 states and 166160 transitions. [2022-01-18 03:45:52,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 03:45:52,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-01-18 03:45:52,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 03:45:53,539 INFO L225 Difference]: With dead ends: 31652 [2022-01-18 03:45:53,540 INFO L226 Difference]: Without dead ends: 31607 [2022-01-18 03:45:53,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 03:45:53,540 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 03:45:53,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 29 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 03:45:53,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31607 states. [2022-01-18 03:45:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31607 to 30777. [2022-01-18 03:45:54,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30777 states, 30689 states have (on average 5.347942259441494) internal successors, (164123), 30776 states have internal predecessors, (164123), 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) [2022-01-18 03:45:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30777 states to 30777 states and 164123 transitions. [2022-01-18 03:45:55,264 INFO L78 Accepts]: Start accepts. Automaton has 30777 states and 164123 transitions. Word has length 4 [2022-01-18 03:45:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 03:45:55,265 INFO L470 AbstractCegarLoop]: Abstraction has 30777 states and 164123 transitions. [2022-01-18 03:45:55,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-01-18 03:45:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 30777 states and 164123 transitions. [2022-01-18 03:45:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-18 03:45:55,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:45:55,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-18 03:45:55,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 03:45:55,267 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 3 more)] === [2022-01-18 03:45:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:45:55,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1052868883, now seen corresponding path program 1 times [2022-01-18 03:45:55,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:45:55,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267719791] [2022-01-18 03:45:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:45:55,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:45:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:45:55,278 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-18 03:45:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:45:55,285 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-18 03:45:55,285 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-18 03:45:55,286 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (6 of 7 remaining) [2022-01-18 03:45:55,286 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (5 of 7 remaining) [2022-01-18 03:45:55,286 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (4 of 7 remaining) [2022-01-18 03:45:55,286 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (3 of 7 remaining) [2022-01-18 03:45:55,286 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (2 of 7 remaining) [2022-01-18 03:45:55,286 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 7 remaining) [2022-01-18 03:45:55,286 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 7 remaining) [2022-01-18 03:45:55,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-18 03:45:55,287 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-01-18 03:45:55,287 WARN L234 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-18 03:45:55,287 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-01-18 03:45:55,300 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-18 03:45:55,302 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 03:45:55,302 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, 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 [2022-01-18 03:45:55,302 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-01-18 03:45:55,303 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 39 transitions, 138 flow [2022-01-18 03:45:57,335 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 54681 states, 54497 states have (on average 6.55806741655504) internal successors, (357395), 54680 states have internal predecessors, (357395), 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) [2022-01-18 03:45:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 54681 states, 54497 states have (on average 6.55806741655504) internal successors, (357395), 54680 states have internal predecessors, (357395), 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) [2022-01-18 03:45:57,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-01-18 03:45:57,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:45:57,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-01-18 03:45:57,434 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 4 more)] === [2022-01-18 03:45:57,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:45:57,435 INFO L85 PathProgramCache]: Analyzing trace with hash 5639240, now seen corresponding path program 1 times [2022-01-18 03:45:57,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:45:57,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572323187] [2022-01-18 03:45:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:45:57,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:45:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:45:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:45:57,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 03:45:57,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572323187] [2022-01-18 03:45:57,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572323187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 03:45:57,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 03:45:57,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 03:45:57,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083111763] [2022-01-18 03:45:57,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 03:45:57,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 03:45:57,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 03:45:57,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 03:45:57,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 03:45:57,547 INFO L87 Difference]: Start difference. First operand has 54681 states, 54497 states have (on average 6.55806741655504) internal successors, (357395), 54680 states have internal predecessors, (357395), 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 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-01-18 03:46:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 03:46:00,415 INFO L93 Difference]: Finished difference Result 160794 states and 992632 transitions. [2022-01-18 03:46:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 03:46:00,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-01-18 03:46:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 03:46:02,023 INFO L225 Difference]: With dead ends: 160794 [2022-01-18 03:46:02,023 INFO L226 Difference]: Without dead ends: 160731 [2022-01-18 03:46:02,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 03:46:02,024 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 03:46:02,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 33 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 03:46:02,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160731 states. [2022-01-18 03:46:08,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160731 to 158203. [2022-01-18 03:46:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158203 states, 158020 states have (on average 6.239305151246677) internal successors, (985935), 158202 states have internal predecessors, (985935), 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) [2022-01-18 03:46:10,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158203 states to 158203 states and 985935 transitions. [2022-01-18 03:46:10,837 INFO L78 Accepts]: Start accepts. Automaton has 158203 states and 985935 transitions. Word has length 4 [2022-01-18 03:46:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 03:46:10,837 INFO L470 AbstractCegarLoop]: Abstraction has 158203 states and 985935 transitions. [2022-01-18 03:46:10,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-01-18 03:46:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand 158203 states and 985935 transitions. [2022-01-18 03:46:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-18 03:46:10,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:46:10,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 03:46:10,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-18 03:46:10,839 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 4 more)] === [2022-01-18 03:46:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:46:10,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1832009972, now seen corresponding path program 1 times [2022-01-18 03:46:10,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:46:10,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716381610] [2022-01-18 03:46:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:46:10,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:46:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:46:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:46:10,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 03:46:10,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716381610] [2022-01-18 03:46:10,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716381610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 03:46:10,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 03:46:10,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 03:46:10,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210414732] [2022-01-18 03:46:10,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 03:46:10,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 03:46:10,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 03:46:10,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 03:46:10,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 03:46:10,865 INFO L87 Difference]: Start difference. First operand 158203 states and 985935 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-01-18 03:46:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 03:46:17,215 INFO L93 Difference]: Finished difference Result 375293 states and 2224451 transitions. [2022-01-18 03:46:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 03:46:17,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2022-01-18 03:46:17,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 03:46:21,499 INFO L225 Difference]: With dead ends: 375293 [2022-01-18 03:46:21,500 INFO L226 Difference]: Without dead ends: 374443 [2022-01-18 03:46:21,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 03:46:21,501 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 03:46:21,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 49 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 03:46:22,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374443 states. [2022-01-18 03:46:32,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374443 to 196711. [2022-01-18 03:46:32,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196711 states, 196531 states have (on average 6.0801196757763405) internal successors, (1194932), 196710 states have internal predecessors, (1194932), 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) [2022-01-18 03:46:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196711 states to 196711 states and 1194932 transitions. [2022-01-18 03:46:34,941 INFO L78 Accepts]: Start accepts. Automaton has 196711 states and 1194932 transitions. Word has length 8 [2022-01-18 03:46:34,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 03:46:34,942 INFO L470 AbstractCegarLoop]: Abstraction has 196711 states and 1194932 transitions. [2022-01-18 03:46:34,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-01-18 03:46:34,942 INFO L276 IsEmpty]: Start isEmpty. Operand 196711 states and 1194932 transitions. [2022-01-18 03:46:34,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-18 03:46:34,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:46:34,943 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 03:46:34,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-18 03:46:34,944 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 4 more)] === [2022-01-18 03:46:34,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:46:34,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1626909278, now seen corresponding path program 1 times [2022-01-18 03:46:34,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:46:34,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392950632] [2022-01-18 03:46:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:46:34,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:46:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:46:34,947 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-18 03:46:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:46:34,949 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-18 03:46:34,949 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-18 03:46:34,949 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (7 of 8 remaining) [2022-01-18 03:46:34,950 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (6 of 8 remaining) [2022-01-18 03:46:34,950 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (5 of 8 remaining) [2022-01-18 03:46:34,950 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (4 of 8 remaining) [2022-01-18 03:46:34,950 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (3 of 8 remaining) [2022-01-18 03:46:34,950 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (2 of 8 remaining) [2022-01-18 03:46:34,950 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 8 remaining) [2022-01-18 03:46:34,950 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 8 remaining) [2022-01-18 03:46:34,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 03:46:34,951 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-01-18 03:46:34,951 WARN L234 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-18 03:46:34,951 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-01-18 03:46:34,959 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-18 03:46:34,960 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 03:46:34,960 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, 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 [2022-01-18 03:46:34,960 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-01-18 03:46:34,961 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 53 places, 45 transitions, 167 flow [2022-01-18 03:46:46,155 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 273430 states, 273055 states have (on average 7.546142718499936) internal successors, (2060512), 273429 states have internal predecessors, (2060512), 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) [2022-01-18 03:46:46,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 273430 states, 273055 states have (on average 7.546142718499936) internal successors, (2060512), 273429 states have internal predecessors, (2060512), 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) [2022-01-18 03:46:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-01-18 03:46:46,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:46:46,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-01-18 03:46:46,711 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 5 more)] === [2022-01-18 03:46:46,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:46:46,711 INFO L85 PathProgramCache]: Analyzing trace with hash 7028685, now seen corresponding path program 1 times [2022-01-18 03:46:46,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:46:46,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179522332] [2022-01-18 03:46:46,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:46:46,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:46:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:46:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:46:46,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 03:46:46,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179522332] [2022-01-18 03:46:46,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179522332] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 03:46:46,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 03:46:46,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 03:46:46,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087510218] [2022-01-18 03:46:46,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 03:46:46,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 03:46:46,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 03:46:46,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 03:46:46,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 03:46:47,288 INFO L87 Difference]: Start difference. First operand has 273430 states, 273055 states have (on average 7.546142718499936) internal successors, (2060512), 273429 states have internal predecessors, (2060512), 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 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-01-18 03:47:06,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 03:47:06,760 INFO L93 Difference]: Finished difference Result 810888 states and 5756826 transitions. [2022-01-18 03:47:06,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 03:47:06,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-01-18 03:47:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 03:47:22,618 INFO L225 Difference]: With dead ends: 810888 [2022-01-18 03:47:22,618 INFO L226 Difference]: Without dead ends: 810804 [2022-01-18 03:47:22,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 03:47:22,619 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 03:47:22,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 37 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 03:47:25,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810804 states. [2022-01-18 03:48:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810804 to 803176. [2022-01-18 03:48:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803176 states, 802802 states have (on average 7.143298098410318) internal successors, (5734654), 803175 states have internal predecessors, (5734654), 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) [2022-01-18 03:48:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803176 states to 803176 states and 5734654 transitions. [2022-01-18 03:48:26,876 INFO L78 Accepts]: Start accepts. Automaton has 803176 states and 5734654 transitions. Word has length 4 [2022-01-18 03:48:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 03:48:26,876 INFO L470 AbstractCegarLoop]: Abstraction has 803176 states and 5734654 transitions. [2022-01-18 03:48:26,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-01-18 03:48:26,876 INFO L276 IsEmpty]: Start isEmpty. Operand 803176 states and 5734654 transitions. [2022-01-18 03:48:26,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-18 03:48:26,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:48:26,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 03:48:26,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-18 03:48:26,878 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 5 more)] === [2022-01-18 03:48:26,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:48:26,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1476837880, now seen corresponding path program 1 times [2022-01-18 03:48:26,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:48:26,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733611336] [2022-01-18 03:48:26,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:26,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:48:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:48:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:48:26,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 03:48:26,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733611336] [2022-01-18 03:48:26,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733611336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 03:48:26,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 03:48:26,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 03:48:26,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574367091] [2022-01-18 03:48:26,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 03:48:26,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 03:48:26,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 03:48:26,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 03:48:26,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 03:48:26,924 INFO L87 Difference]: Start difference. First operand 803176 states and 5734654 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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)