/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-7.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:09:53,015 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:09:53,061 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:09:53,076 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:09:53,077 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:09:53,077 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:09:53,078 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:09:53,078 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:09:53,078 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:09:53,078 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:09:53,079 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:09:53,079 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:09:53,079 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:09:53,079 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:09:53,080 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:09:53,080 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:09:53,080 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:09:53,080 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:09:53,080 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:09:53,081 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:09:53,081 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:09:53,085 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:09:53,085 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:09:53,085 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:09:53,085 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:09:53,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:09:53,086 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:09:53,086 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:09:53,086 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:09:53,086 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:09:53,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:09:53,086 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:09:53,087 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:09:53,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:09:53,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:09:53,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:09:53,322 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:09:53,323 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:09:53,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-7.i [2023-11-17 11:09:54,454 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:09:54,655 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:09:54,657 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-7.i [2023-11-17 11:09:54,668 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/699323b48/a0d187fdb3494290ae1bd31ffc1591f6/FLAG8a04e623c [2023-11-17 11:09:54,684 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/699323b48/a0d187fdb3494290ae1bd31ffc1591f6 [2023-11-17 11:09:54,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:09:54,688 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:09:54,688 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:09:54,688 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:09:54,691 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:09:54,692 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:09:54" (1/1) ... [2023-11-17 11:09:54,693 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d06f0dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:54, skipping insertion in model container [2023-11-17 11:09:54,693 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:09:54" (1/1) ... [2023-11-17 11:09:54,732 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:09:55,092 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-7.i[30243,30256] [2023-11-17 11:09:55,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:09:55,138 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:09:55,194 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-7.i[30243,30256] [2023-11-17 11:09:55,222 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:09:55,260 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:09:55,261 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:09:55,278 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:09:55,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55 WrapperNode [2023-11-17 11:09:55,280 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:09:55,281 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:09:55,281 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:09:55,281 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:09:55,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,326 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,362 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-11-17 11:09:55,363 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:09:55,363 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:09:55,363 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:09:55,363 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:09:55,370 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,389 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,389 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,395 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,398 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,399 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,400 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,409 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:09:55,410 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:09:55,410 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:09:55,410 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:09:55,411 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:09:55,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:09:55,482 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) [2023-11-17 11:09:55,509 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 [2023-11-17 11:09:55,535 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-17 11:09:55,535 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-17 11:09:55,536 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-17 11:09:55,536 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-17 11:09:55,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:09:55,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:09:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:09:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:09:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:09:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:09:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:09:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:09:55,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:09:55,538 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:09:55,623 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:09:55,625 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:09:55,784 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:09:55,883 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:09:55,883 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 11:09:55,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:09:55 BoogieIcfgContainer [2023-11-17 11:09:55,884 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:09:55,886 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:09:55,886 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:09:55,888 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:09:55,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:09:54" (1/3) ... [2023-11-17 11:09:55,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b98baf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:09:55, skipping insertion in model container [2023-11-17 11:09:55,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (2/3) ... [2023-11-17 11:09:55,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b98baf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:09:55, skipping insertion in model container [2023-11-17 11:09:55,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:09:55" (3/3) ... [2023-11-17 11:09:55,890 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-7.i [2023-11-17 11:09:55,903 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:09:55,904 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:09:55,904 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:09:55,941 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:09:55,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2023-11-17 11:09:56,005 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-17 11:09:56,006 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:09:56,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-17 11:09:56,009 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2023-11-17 11:09:56,011 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2023-11-17 11:09:56,021 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:09:56,032 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 30 places, 27 transitions, 60 flow [2023-11-17 11:09:56,038 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 30 places, 27 transitions, 60 flow [2023-11-17 11:09:56,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 60 flow [2023-11-17 11:09:56,045 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-17 11:09:56,046 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:09:56,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-17 11:09:56,047 INFO L119 LiptonReduction]: Number of co-enabled transitions 270 [2023-11-17 11:09:57,352 INFO L134 LiptonReduction]: Checked pairs total: 210 [2023-11-17 11:09:57,353 INFO L136 LiptonReduction]: Total number of compositions: 18 [2023-11-17 11:09:57,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:09:57,371 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4e5bf655, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:09:57,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:09:57,376 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:09:57,376 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2023-11-17 11:09:57,376 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:09:57,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:09:57,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:09:57,377 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:09:57,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:09:57,381 INFO L85 PathProgramCache]: Analyzing trace with hash -146274990, now seen corresponding path program 1 times [2023-11-17 11:09:57,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:09:57,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195527943] [2023-11-17 11:09:57,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:57,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:09:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:57,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:09:57,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195527943] [2023-11-17 11:09:57,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195527943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:09:57,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:09:57,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:09:57,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464713272] [2023-11-17 11:09:57,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:09:57,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:09:57,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:09:57,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:09:57,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:09:57,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2023-11-17 11:09:57,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2023-11-17 11:09:57,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:09:57,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2023-11-17 11:09:57,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:09:57,752 INFO L124 PetriNetUnfolderBase]: 97/149 cut-off events. [2023-11-17 11:09:57,752 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:09:57,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 149 events. 97/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 323 event pairs, 20 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 300. Up to 91 conditions per place. [2023-11-17 11:09:57,756 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2023-11-17 11:09:57,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2023-11-17 11:09:57,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:09:57,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:09:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2023-11-17 11:09:57,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41843971631205673 [2023-11-17 11:09:57,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 59 transitions. [2023-11-17 11:09:57,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 59 transitions. [2023-11-17 11:09:57,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:09:57,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 59 transitions. [2023-11-17 11:09:57,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2023-11-17 11:09:57,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-17 11:09:57,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-17 11:09:57,780 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 59 transitions. [2023-11-17 11:09:57,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2023-11-17 11:09:57,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 11:09:57,784 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2023-11-17 11:09:57,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2023-11-17 11:09:57,789 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2023-11-17 11:09:57,790 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2023-11-17 11:09:57,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2023-11-17 11:09:57,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:09:57,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:09:57,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:09:57,791 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:09:57,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:09:57,792 INFO L85 PathProgramCache]: Analyzing trace with hash -239558132, now seen corresponding path program 1 times [2023-11-17 11:09:57,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:09:57,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522409492] [2023-11-17 11:09:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:57,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:09:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:57,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:09:57,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522409492] [2023-11-17 11:09:57,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522409492] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:09:57,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054963065] [2023-11-17 11:09:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:57,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:09:57,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:09:57,910 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:09:57,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 11:09:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:57,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:09:57,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:09:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:58,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:09:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:58,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054963065] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:09:58,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:09:58,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:09:58,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018707969] [2023-11-17 11:09:58,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:09:58,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:09:58,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:09:58,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:09:58,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:09:58,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2023-11-17 11:09:58,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 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) [2023-11-17 11:09:58,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:09:58,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2023-11-17 11:09:58,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:09:58,128 INFO L124 PetriNetUnfolderBase]: 133/203 cut-off events. [2023-11-17 11:09:58,128 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:09:58,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 203 events. 133/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 442 event pairs, 20 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 471. Up to 64 conditions per place. [2023-11-17 11:09:58,130 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-11-17 11:09:58,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2023-11-17 11:09:58,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:09:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:09:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2023-11-17 11:09:58,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41134751773049644 [2023-11-17 11:09:58,132 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 116 transitions. [2023-11-17 11:09:58,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 116 transitions. [2023-11-17 11:09:58,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:09:58,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 116 transitions. [2023-11-17 11:09:58,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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) [2023-11-17 11:09:58,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 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) [2023-11-17 11:09:58,134 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 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) [2023-11-17 11:09:58,134 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 116 transitions. [2023-11-17 11:09:58,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2023-11-17 11:09:58,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:09:58,135 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2023-11-17 11:09:58,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-11-17 11:09:58,136 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2023-11-17 11:09:58,136 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2023-11-17 11:09:58,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 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) [2023-11-17 11:09:58,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:09:58,136 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:09:58,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 11:09:58,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:09:58,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:09:58,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:09:58,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1558602706, now seen corresponding path program 2 times [2023-11-17 11:09:58,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:09:58,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075151352] [2023-11-17 11:09:58,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:58,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:09:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:58,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:09:58,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075151352] [2023-11-17 11:09:58,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075151352] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:09:58,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024992074] [2023-11-17 11:09:58,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:09:58,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:09:58,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:09:58,420 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:09:58,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 11:09:58,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:09:58,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:09:58,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 11:09:58,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:09:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:58,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:09:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:58,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024992074] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:09:58,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:09:58,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 11:09:58,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75490890] [2023-11-17 11:09:58,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:09:58,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 11:09:58,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:09:58,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 11:09:58,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-17 11:09:58,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2023-11-17 11:09:58,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 76 flow. Second operand has 13 states, 13 states have (on average 13.384615384615385) internal successors, (174), 13 states have internal predecessors, (174), 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) [2023-11-17 11:09:58,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:09:58,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2023-11-17 11:09:58,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:09:58,687 INFO L124 PetriNetUnfolderBase]: 241/365 cut-off events. [2023-11-17 11:09:58,687 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-11-17 11:09:58,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 365 events. 241/365 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 841 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 993. Up to 109 conditions per place. [2023-11-17 11:09:58,690 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2023-11-17 11:09:58,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2023-11-17 11:09:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:09:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:09:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2023-11-17 11:09:58,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41312056737588654 [2023-11-17 11:09:58,692 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 233 transitions. [2023-11-17 11:09:58,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 233 transitions. [2023-11-17 11:09:58,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:09:58,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 233 transitions. [2023-11-17 11:09:58,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 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) [2023-11-17 11:09:58,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 47.0) internal successors, (611), 13 states have internal predecessors, (611), 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) [2023-11-17 11:09:58,696 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 47.0) internal successors, (611), 13 states have internal predecessors, (611), 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) [2023-11-17 11:09:58,696 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 233 transitions. [2023-11-17 11:09:58,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2023-11-17 11:09:58,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 83 transitions, 384 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 11:09:58,699 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2023-11-17 11:09:58,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2023-11-17 11:09:58,700 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2023-11-17 11:09:58,700 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2023-11-17 11:09:58,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.384615384615385) internal successors, (174), 13 states have internal predecessors, (174), 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) [2023-11-17 11:09:58,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:09:58,700 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-17 11:09:58,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 11:09:58,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-17 11:09:58,912 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:09:58,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:09:58,912 INFO L85 PathProgramCache]: Analyzing trace with hash -254158446, now seen corresponding path program 3 times [2023-11-17 11:09:58,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:09:58,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226150445] [2023-11-17 11:09:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:58,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:09:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:59,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:09:59,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226150445] [2023-11-17 11:09:59,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226150445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:09:59,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729996939] [2023-11-17 11:09:59,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:09:59,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:09:59,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:09:59,114 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:09:59,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 11:09:59,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-17 11:09:59,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:09:59,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 11:09:59,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:09:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:59,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:09:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:59,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729996939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:09:59,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:09:59,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 18 [2023-11-17 11:09:59,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146441256] [2023-11-17 11:09:59,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:09:59,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 11:09:59,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:09:59,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 11:09:59,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2023-11-17 11:09:59,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2023-11-17 11:09:59,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 19 states, 19 states have (on average 13.31578947368421) internal successors, (253), 19 states have internal predecessors, (253), 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) [2023-11-17 11:09:59,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:09:59,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2023-11-17 11:09:59,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:09:59,491 INFO L124 PetriNetUnfolderBase]: 349/527 cut-off events. [2023-11-17 11:09:59,492 INFO L125 PetriNetUnfolderBase]: For 2259/2259 co-relation queries the response was YES. [2023-11-17 11:09:59,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1654 conditions, 527 events. 349/527 cut-off events. For 2259/2259 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1239 event pairs, 20 based on Foata normal form. 54/465 useless extension candidates. Maximal degree in co-relation 1632. Up to 136 conditions per place. [2023-11-17 11:09:59,495 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 108 selfloop transitions, 17 changer transitions 0/125 dead transitions. [2023-11-17 11:09:59,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 125 transitions, 636 flow [2023-11-17 11:09:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 11:09:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 11:09:59,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 347 transitions. [2023-11-17 11:09:59,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4101654846335697 [2023-11-17 11:09:59,498 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 347 transitions. [2023-11-17 11:09:59,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 347 transitions. [2023-11-17 11:09:59,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:09:59,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 347 transitions. [2023-11-17 11:09:59,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 19.27777777777778) internal successors, (347), 18 states have internal predecessors, (347), 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) [2023-11-17 11:09:59,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 47.0) internal successors, (893), 19 states have internal predecessors, (893), 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) [2023-11-17 11:09:59,507 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 47.0) internal successors, (893), 19 states have internal predecessors, (893), 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) [2023-11-17 11:09:59,507 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 18 states and 347 transitions. [2023-11-17 11:09:59,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 125 transitions, 636 flow [2023-11-17 11:09:59,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 125 transitions, 576 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-11-17 11:09:59,515 INFO L231 Difference]: Finished difference. Result has 59 places, 29 transitions, 194 flow [2023-11-17 11:09:59,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=194, PETRI_PLACES=59, PETRI_TRANSITIONS=29} [2023-11-17 11:09:59,517 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 41 predicate places. [2023-11-17 11:09:59,517 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 29 transitions, 194 flow [2023-11-17 11:09:59,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.31578947368421) internal successors, (253), 19 states have internal predecessors, (253), 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) [2023-11-17 11:09:59,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:09:59,517 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1, 1, 1, 1] [2023-11-17 11:09:59,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 11:09:59,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:09:59,723 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:09:59,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:09:59,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1749942098, now seen corresponding path program 4 times [2023-11-17 11:09:59,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:09:59,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011804153] [2023-11-17 11:09:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:59,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:09:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:10:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:00,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:10:00,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011804153] [2023-11-17 11:10:00,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011804153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:10:00,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335214233] [2023-11-17 11:10:00,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:10:00,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:10:00,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:10:00,464 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:10:00,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 11:10:00,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:10:00,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:10:00,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-17 11:10:00,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:10:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:01,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:10:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:02,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335214233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:10:02,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:10:02,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2023-11-17 11:10:02,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399292818] [2023-11-17 11:10:02,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:10:02,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-17 11:10:02,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:10:02,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-17 11:10:02,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=2248, Unknown=0, NotChecked=0, Total=2756 [2023-11-17 11:10:02,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2023-11-17 11:10:02,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 29 transitions, 194 flow. Second operand has 53 states, 53 states have (on average 8.245283018867925) internal successors, (437), 53 states have internal predecessors, (437), 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) [2023-11-17 11:10:02,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:10:02,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2023-11-17 11:10:02,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:10:16,748 INFO L124 PetriNetUnfolderBase]: 27867/41812 cut-off events. [2023-11-17 11:10:16,748 INFO L125 PetriNetUnfolderBase]: For 171828/171828 co-relation queries the response was YES. [2023-11-17 11:10:16,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140310 conditions, 41812 events. 27867/41812 cut-off events. For 171828/171828 co-relation queries the response was YES. Maximal size of possible extension queue 1174. Compared 280278 event pairs, 79 based on Foata normal form. 145/31523 useless extension candidates. Maximal degree in co-relation 140282. Up to 8897 conditions per place. [2023-11-17 11:10:17,221 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 859 selfloop transitions, 1925 changer transitions 0/2784 dead transitions. [2023-11-17 11:10:17,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 2784 transitions, 25159 flow [2023-11-17 11:10:17,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2023-11-17 11:10:17,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2023-11-17 11:10:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 2577 transitions. [2023-11-17 11:10:17,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31877783275606136 [2023-11-17 11:10:17,231 INFO L72 ComplementDD]: Start complementDD. Operand 172 states and 2577 transitions. [2023-11-17 11:10:17,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 172 states and 2577 transitions. [2023-11-17 11:10:17,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:10:17,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 172 states and 2577 transitions. [2023-11-17 11:10:17,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 173 states, 172 states have (on average 14.982558139534884) internal successors, (2577), 172 states have internal predecessors, (2577), 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) [2023-11-17 11:10:17,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 173 states, 173 states have (on average 47.0) internal successors, (8131), 173 states have internal predecessors, (8131), 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) [2023-11-17 11:10:17,411 INFO L81 ComplementDD]: Finished complementDD. Result has 173 states, 173 states have (on average 47.0) internal successors, (8131), 173 states have internal predecessors, (8131), 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) [2023-11-17 11:10:17,411 INFO L175 Difference]: Start difference. First operand has 59 places, 29 transitions, 194 flow. Second operand 172 states and 2577 transitions. [2023-11-17 11:10:17,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 2784 transitions, 25159 flow [2023-11-17 11:10:18,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 2784 transitions, 18653 flow, removed 2625 selfloop flow, removed 11 redundant places. [2023-11-17 11:10:18,205 INFO L231 Difference]: Finished difference. Result has 239 places, 1954 transitions, 11806 flow [2023-11-17 11:10:18,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=172, PETRI_FLOW=11806, PETRI_PLACES=239, PETRI_TRANSITIONS=1954} [2023-11-17 11:10:18,207 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 221 predicate places. [2023-11-17 11:10:18,208 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 1954 transitions, 11806 flow [2023-11-17 11:10:18,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 8.245283018867925) internal successors, (437), 53 states have internal predecessors, (437), 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) [2023-11-17 11:10:18,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:10:18,208 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:10:18,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-17 11:10:18,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:10:18,413 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:10:18,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:10:18,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1699158906, now seen corresponding path program 1 times [2023-11-17 11:10:18,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:10:18,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577998398] [2023-11-17 11:10:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:10:18,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:10:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:10:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:19,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:10:19,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577998398] [2023-11-17 11:10:19,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577998398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:10:19,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463155972] [2023-11-17 11:10:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:10:19,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:10:19,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:10:19,205 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:10:19,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 11:10:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:10:19,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-17 11:10:19,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:10:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 79 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:19,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:10:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:20,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463155972] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:10:20,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:10:20,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2023-11-17 11:10:20,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539264820] [2023-11-17 11:10:20,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:10:20,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-17 11:10:20,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:10:20,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-17 11:10:20,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=2879, Unknown=0, NotChecked=0, Total=3422 [2023-11-17 11:10:20,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2023-11-17 11:10:20,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 1954 transitions, 11806 flow. Second operand has 59 states, 59 states have (on average 8.271186440677965) internal successors, (488), 59 states have internal predecessors, (488), 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) [2023-11-17 11:10:20,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:10:20,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2023-11-17 11:10:20,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand