/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/weaver/parallel-misc-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:07:21,669 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:07:21,764 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 12:07:21,797 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:07:21,799 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:07:21,799 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:07:21,799 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:07:21,800 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:07:21,800 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:07:21,804 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:07:21,805 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:07:21,805 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:07:21,805 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:07:21,806 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:07:21,806 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:07:21,807 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:07:21,807 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:07:21,807 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:07:21,807 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:07:21,807 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:07:21,807 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:07:21,808 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:07:21,808 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:07:21,809 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:07:21,809 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:07:21,810 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:07:21,810 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:07:21,810 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:07:21,811 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:07:21,811 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:07:21,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:07:21,812 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:07:21,812 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:07:22,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:07:22,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:07:22,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:07:22,078 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:07:22,079 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:07:22,080 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c [2023-11-17 12:07:23,366 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:07:23,570 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:07:23,571 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c [2023-11-17 12:07:23,578 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a24252948/0c05f262a81443cc9a9f2e066c9efb09/FLAG1dd9f141f [2023-11-17 12:07:23,598 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a24252948/0c05f262a81443cc9a9f2e066c9efb09 [2023-11-17 12:07:23,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:07:23,603 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:07:23,604 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:07:23,604 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:07:23,607 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:07:23,608 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:07:23" (1/1) ... [2023-11-17 12:07:23,608 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24ac1451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:07:23, skipping insertion in model container [2023-11-17 12:07:23,609 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:07:23" (1/1) ... [2023-11-17 12:07:23,631 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:07:23,757 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c[2436,2449] [2023-11-17 12:07:23,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:07:23,768 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:07:23,786 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c[2436,2449] [2023-11-17 12:07:23,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:07:23,794 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:07:23,795 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:07:23,801 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:07:23,802 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:07:23 WrapperNode [2023-11-17 12:07:23,802 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:07:23,803 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:07:23,803 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:07:23,803 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:07:23,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:07:23" (1/1) ... [2023-11-17 12:07:23,815 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:07:23" (1/1) ... [2023-11-17 12:07:23,832 INFO L138 Inliner]: procedures = 21, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2023-11-17 12:07:23,833 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:07:23,834 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:07:23,834 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:07:23,834 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:07:23,842 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:07:23" (1/1) ... [2023-11-17 12:07:23,843 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:07:23" (1/1) ... [2023-11-17 12:07:23,845 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:07:23" (1/1) ... [2023-11-17 12:07:23,845 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:07:23" (1/1) ... [2023-11-17 12:07:23,849 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:07:23" (1/1) ... [2023-11-17 12:07:23,856 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:07:23" (1/1) ... [2023-11-17 12:07:23,857 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:07:23" (1/1) ... [2023-11-17 12:07:23,858 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:07:23" (1/1) ... [2023-11-17 12:07:23,860 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:07:23,861 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:07:23,861 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:07:23,861 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:07:23,862 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:07:23" (1/1) ... [2023-11-17 12:07:23,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:07:23,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:23,897 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 12:07:23,906 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 12:07:23,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:07:23,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:07:23,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:07:23,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:07:23,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:07:23,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:07:23,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:07:23,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:07:23,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:07:23,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:07:23,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:07:23,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:07:23,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:07:23,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:07:23,926 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 12:07:24,000 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:07:24,002 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:07:24,168 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:07:24,316 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:07:24,316 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 12:07:24,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:07:24 BoogieIcfgContainer [2023-11-17 12:07:24,318 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:07:24,320 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:07:24,320 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:07:24,323 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:07:24,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:07:23" (1/3) ... [2023-11-17 12:07:24,324 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de74d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:07:24, skipping insertion in model container [2023-11-17 12:07:24,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:07:23" (2/3) ... [2023-11-17 12:07:24,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de74d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:07:24, skipping insertion in model container [2023-11-17 12:07:24,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:07:24" (3/3) ... [2023-11-17 12:07:24,326 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2023-11-17 12:07:24,342 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:07:24,343 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:07:24,343 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:07:24,418 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 12:07:24,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 72 flow [2023-11-17 12:07:24,502 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-17 12:07:24,503 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:07:24,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 4/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2023-11-17 12:07:24,507 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 72 flow [2023-11-17 12:07:24,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 64 flow [2023-11-17 12:07:24,518 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:07:24,560 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 29 places, 26 transitions, 64 flow [2023-11-17 12:07:24,565 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 29 places, 26 transitions, 64 flow [2023-11-17 12:07:24,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 64 flow [2023-11-17 12:07:24,587 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2023-11-17 12:07:24,587 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:07:24,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 4/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2023-11-17 12:07:24,590 INFO L119 LiptonReduction]: Number of co-enabled transitions 224 [2023-11-17 12:07:25,938 INFO L134 LiptonReduction]: Checked pairs total: 244 [2023-11-17 12:07:25,939 INFO L136 LiptonReduction]: Total number of compositions: 15 [2023-11-17 12:07:25,964 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:07:25,971 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;@6f3e5a69, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:07:25,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 12:07:25,976 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:07:25,976 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 12:07:25,976 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:07:25,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:25,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:25,977 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 12:07:25,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash 745665184, now seen corresponding path program 1 times [2023-11-17 12:07:25,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:25,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189864641] [2023-11-17 12:07:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:25,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:26,211 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 12:07:26,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:26,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189864641] [2023-11-17 12:07:26,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189864641] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:07:26,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:07:26,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 12:07:26,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725086999] [2023-11-17 12:07:26,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:07:26,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:07:26,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:26,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:07:26,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:07:26,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2023-11-17 12:07:26,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 12:07:26,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:26,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2023-11-17 12:07:26,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:26,347 INFO L124 PetriNetUnfolderBase]: 65/114 cut-off events. [2023-11-17 12:07:26,347 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-17 12:07:26,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 114 events. 65/114 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 321 event pairs, 9 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-11-17 12:07:26,350 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-11-17 12:07:26,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 117 flow [2023-11-17 12:07:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:07:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:07:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2023-11-17 12:07:26,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2023-11-17 12:07:26,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 57 transitions. [2023-11-17 12:07:26,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 57 transitions. [2023-11-17 12:07:26,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:26,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 57 transitions. [2023-11-17 12:07:26,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 12:07:26,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 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 12:07:26,375 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 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 12:07:26,377 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 57 transitions. [2023-11-17 12:07:26,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 117 flow [2023-11-17 12:07:26,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 12:07:26,386 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-11-17 12:07:26,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-11-17 12:07:26,391 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-17 12:07:26,392 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-11-17 12:07:26,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 12:07:26,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:26,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:26,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:07:26,393 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 12:07:26,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:26,394 INFO L85 PathProgramCache]: Analyzing trace with hash -471901780, now seen corresponding path program 1 times [2023-11-17 12:07:26,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:26,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884310887] [2023-11-17 12:07:26,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:26,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:07:26,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:26,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884310887] [2023-11-17 12:07:26,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884310887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:07:26,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:07:26,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:07:26,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627525409] [2023-11-17 12:07:26,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:07:26,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:07:26,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:26,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:07:26,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:07:26,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2023-11-17 12:07:26,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 12:07:26,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:26,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2023-11-17 12:07:26,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:26,590 INFO L124 PetriNetUnfolderBase]: 49/86 cut-off events. [2023-11-17 12:07:26,590 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 12:07:26,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 86 events. 49/86 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 200 event pairs, 7 based on Foata normal form. 9/92 useless extension candidates. Maximal degree in co-relation 62. Up to 69 conditions per place. [2023-11-17 12:07:26,591 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 18 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-11-17 12:07:26,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 23 transitions, 112 flow [2023-11-17 12:07:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:07:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:07:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2023-11-17 12:07:26,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2023-11-17 12:07:26,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 56 transitions. [2023-11-17 12:07:26,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 56 transitions. [2023-11-17 12:07:26,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:26,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 56 transitions. [2023-11-17 12:07:26,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 12:07:26,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 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 12:07:26,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 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 12:07:26,596 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 3 states and 56 transitions. [2023-11-17 12:07:26,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 23 transitions, 112 flow [2023-11-17 12:07:26,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 107 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 12:07:26,597 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 65 flow [2023-11-17 12:07:26,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-11-17 12:07:26,598 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2023-11-17 12:07:26,598 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 65 flow [2023-11-17 12:07:26,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 12:07:26,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:26,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:26,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:07:26,599 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 12:07:26,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:26,600 INFO L85 PathProgramCache]: Analyzing trace with hash 870979943, now seen corresponding path program 1 times [2023-11-17 12:07:26,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:26,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087960535] [2023-11-17 12:07:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:26,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:07:26,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:26,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087960535] [2023-11-17 12:07:26,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087960535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:07:26,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:07:26,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:07:26,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862255411] [2023-11-17 12:07:26,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:07:26,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:07:26,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:26,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:07:26,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:07:26,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2023-11-17 12:07:26,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 12:07:26,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:26,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2023-11-17 12:07:26,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:26,794 INFO L124 PetriNetUnfolderBase]: 40/76 cut-off events. [2023-11-17 12:07:26,794 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-17 12:07:26,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 76 events. 40/76 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 160 event pairs, 6 based on Foata normal form. 6/79 useless extension candidates. Maximal degree in co-relation 143. Up to 49 conditions per place. [2023-11-17 12:07:26,795 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 19 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-17 12:07:26,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 24 transitions, 130 flow [2023-11-17 12:07:26,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:07:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:07:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2023-11-17 12:07:26,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2023-11-17 12:07:26,798 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 56 transitions. [2023-11-17 12:07:26,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 56 transitions. [2023-11-17 12:07:26,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:26,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 56 transitions. [2023-11-17 12:07:26,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 12:07:26,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 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 12:07:26,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 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 12:07:26,801 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 65 flow. Second operand 3 states and 56 transitions. [2023-11-17 12:07:26,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 24 transitions, 130 flow [2023-11-17 12:07:26,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 24 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:07:26,803 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 79 flow [2023-11-17 12:07:26,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-11-17 12:07:26,805 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-11-17 12:07:26,805 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 79 flow [2023-11-17 12:07:26,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 12:07:26,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:26,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:26,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:07:26,806 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 12:07:26,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:26,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1051874717, now seen corresponding path program 1 times [2023-11-17 12:07:26,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:26,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390843950] [2023-11-17 12:07:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:26,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:07:27,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:27,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390843950] [2023-11-17 12:07:27,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390843950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:27,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453373523] [2023-11-17 12:07:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:27,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:27,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:27,029 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 12:07:27,045 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 12:07:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:27,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:07:27,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:27,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:27,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453373523] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:27,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:27,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2023-11-17 12:07:27,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78514770] [2023-11-17 12:07:27,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:27,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:07:27,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:27,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:07:27,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:07:27,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2023-11-17 12:07:27,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 79 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 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 12:07:27,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:27,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2023-11-17 12:07:27,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:27,749 INFO L124 PetriNetUnfolderBase]: 75/136 cut-off events. [2023-11-17 12:07:27,749 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-11-17 12:07:27,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 136 events. 75/136 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 335 event pairs, 0 based on Foata normal form. 24/158 useless extension candidates. Maximal degree in co-relation 137. Up to 69 conditions per place. [2023-11-17 12:07:27,754 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 44 selfloop transitions, 23 changer transitions 0/69 dead transitions. [2023-11-17 12:07:27,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 69 transitions, 401 flow [2023-11-17 12:07:27,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:07:27,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:07:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 180 transitions. [2023-11-17 12:07:27,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2727272727272727 [2023-11-17 12:07:27,758 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 180 transitions. [2023-11-17 12:07:27,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 180 transitions. [2023-11-17 12:07:27,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:27,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 180 transitions. [2023-11-17 12:07:27,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 12.0) internal successors, (180), 15 states have internal predecessors, (180), 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 12:07:27,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 44.0) internal successors, (704), 16 states have internal predecessors, (704), 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 12:07:27,765 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 44.0) internal successors, (704), 16 states have internal predecessors, (704), 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 12:07:27,765 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 79 flow. Second operand 15 states and 180 transitions. [2023-11-17 12:07:27,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 69 transitions, 401 flow [2023-11-17 12:07:27,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 69 transitions, 397 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:07:27,769 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 277 flow [2023-11-17 12:07:27,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=277, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-11-17 12:07:27,770 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 22 predicate places. [2023-11-17 12:07:27,770 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 277 flow [2023-11-17 12:07:27,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 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 12:07:27,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:27,771 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:27,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 12:07:27,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:27,977 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 12:07:27,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:27,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1347735822, now seen corresponding path program 2 times [2023-11-17 12:07:27,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:27,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72274993] [2023-11-17 12:07:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:27,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:28,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:28,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72274993] [2023-11-17 12:07:28,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72274993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:28,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267656988] [2023-11-17 12:07:28,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:07:28,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:28,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:28,409 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 12:07:28,436 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 12:07:28,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:07:28,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:28,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 12:07:28,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:28,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:29,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267656988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:29,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:29,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2023-11-17 12:07:29,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242444891] [2023-11-17 12:07:29,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:29,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:07:29,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:29,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:07:29,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:07:29,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 44 [2023-11-17 12:07:29,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 277 flow. Second operand has 18 states, 18 states have (on average 7.166666666666667) internal successors, (129), 18 states have internal predecessors, (129), 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 12:07:29,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:29,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 44 [2023-11-17 12:07:29,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:30,012 INFO L124 PetriNetUnfolderBase]: 318/545 cut-off events. [2023-11-17 12:07:30,012 INFO L125 PetriNetUnfolderBase]: For 1472/1472 co-relation queries the response was YES. [2023-11-17 12:07:30,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2577 conditions, 545 events. 318/545 cut-off events. For 1472/1472 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2203 event pairs, 0 based on Foata normal form. 14/557 useless extension candidates. Maximal degree in co-relation 1033. Up to 259 conditions per place. [2023-11-17 12:07:30,018 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 74 selfloop transitions, 101 changer transitions 28/205 dead transitions. [2023-11-17 12:07:30,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 205 transitions, 1765 flow [2023-11-17 12:07:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 12:07:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 12:07:30,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 263 transitions. [2023-11-17 12:07:30,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2598814229249012 [2023-11-17 12:07:30,020 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 263 transitions. [2023-11-17 12:07:30,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 263 transitions. [2023-11-17 12:07:30,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:30,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 263 transitions. [2023-11-17 12:07:30,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 11.434782608695652) internal successors, (263), 23 states have internal predecessors, (263), 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 12:07:30,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 44.0) internal successors, (1056), 24 states have internal predecessors, (1056), 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 12:07:30,023 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 44.0) internal successors, (1056), 24 states have internal predecessors, (1056), 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 12:07:30,023 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 277 flow. Second operand 23 states and 263 transitions. [2023-11-17 12:07:30,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 205 transitions, 1765 flow [2023-11-17 12:07:30,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 205 transitions, 1458 flow, removed 138 selfloop flow, removed 4 redundant places. [2023-11-17 12:07:30,033 INFO L231 Difference]: Finished difference. Result has 62 places, 121 transitions, 1023 flow [2023-11-17 12:07:30,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1023, PETRI_PLACES=62, PETRI_TRANSITIONS=121} [2023-11-17 12:07:30,034 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2023-11-17 12:07:30,034 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 121 transitions, 1023 flow [2023-11-17 12:07:30,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.166666666666667) internal successors, (129), 18 states have internal predecessors, (129), 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 12:07:30,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:30,035 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:30,045 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 12:07:30,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:30,242 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 12:07:30,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:30,243 INFO L85 PathProgramCache]: Analyzing trace with hash 913786364, now seen corresponding path program 3 times [2023-11-17 12:07:30,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:30,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508974962] [2023-11-17 12:07:30,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:30,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:30,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:30,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508974962] [2023-11-17 12:07:30,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508974962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:30,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696601932] [2023-11-17 12:07:30,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:07:30,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:30,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:30,595 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 12:07:30,613 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 12:07:30,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:07:30,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:30,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 12:07:30,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:30,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:31,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696601932] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:31,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:31,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-17 12:07:31,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708872100] [2023-11-17 12:07:31,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:31,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:07:31,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:31,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:07:31,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:07:31,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 44 [2023-11-17 12:07:31,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 121 transitions, 1023 flow. Second operand has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 19 states have internal predecessors, (131), 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 12:07:31,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:31,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 44 [2023-11-17 12:07:31,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:32,531 INFO L124 PetriNetUnfolderBase]: 682/1069 cut-off events. [2023-11-17 12:07:32,531 INFO L125 PetriNetUnfolderBase]: For 2077/2077 co-relation queries the response was YES. [2023-11-17 12:07:32,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5162 conditions, 1069 events. 682/1069 cut-off events. For 2077/2077 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4573 event pairs, 4 based on Foata normal form. 8/1075 useless extension candidates. Maximal degree in co-relation 5087. Up to 349 conditions per place. [2023-11-17 12:07:32,542 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 89 selfloop transitions, 269 changer transitions 25/385 dead transitions. [2023-11-17 12:07:32,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 385 transitions, 3884 flow [2023-11-17 12:07:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 12:07:32,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 12:07:32,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 335 transitions. [2023-11-17 12:07:32,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23792613636363635 [2023-11-17 12:07:32,545 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 335 transitions. [2023-11-17 12:07:32,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 335 transitions. [2023-11-17 12:07:32,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:32,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 335 transitions. [2023-11-17 12:07:32,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 10.46875) internal successors, (335), 32 states have internal predecessors, (335), 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 12:07:32,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 44.0) internal successors, (1452), 33 states have internal predecessors, (1452), 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 12:07:32,549 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 44.0) internal successors, (1452), 33 states have internal predecessors, (1452), 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 12:07:32,549 INFO L175 Difference]: Start difference. First operand has 62 places, 121 transitions, 1023 flow. Second operand 32 states and 335 transitions. [2023-11-17 12:07:32,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 385 transitions, 3884 flow [2023-11-17 12:07:32,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 385 transitions, 2790 flow, removed 539 selfloop flow, removed 5 redundant places. [2023-11-17 12:07:32,583 INFO L231 Difference]: Finished difference. Result has 97 places, 311 transitions, 2584 flow [2023-11-17 12:07:32,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2584, PETRI_PLACES=97, PETRI_TRANSITIONS=311} [2023-11-17 12:07:32,585 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-11-17 12:07:32,585 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 311 transitions, 2584 flow [2023-11-17 12:07:32,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 19 states have internal predecessors, (131), 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 12:07:32,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:32,586 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:32,596 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 12:07:32,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:32,797 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:07:32,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:32,797 INFO L85 PathProgramCache]: Analyzing trace with hash -899771964, now seen corresponding path program 4 times [2023-11-17 12:07:32,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:32,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671862759] [2023-11-17 12:07:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:32,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:33,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:33,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671862759] [2023-11-17 12:07:33,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671862759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:33,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550782832] [2023-11-17 12:07:33,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:07:33,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:33,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:33,193 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 12:07:33,202 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 12:07:33,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:07:33,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:33,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:07:33,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:33,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:33,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550782832] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:33,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:33,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 15 [2023-11-17 12:07:33,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130080767] [2023-11-17 12:07:33,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:33,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:07:33,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:33,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:07:33,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:07:33,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 44 [2023-11-17 12:07:33,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 311 transitions, 2584 flow. Second operand has 17 states, 17 states have (on average 7.176470588235294) internal successors, (122), 17 states have internal predecessors, (122), 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 12:07:33,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:33,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 44 [2023-11-17 12:07:33,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:34,432 INFO L124 PetriNetUnfolderBase]: 1025/1574 cut-off events. [2023-11-17 12:07:34,432 INFO L125 PetriNetUnfolderBase]: For 1405/1405 co-relation queries the response was YES. [2023-11-17 12:07:34,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7281 conditions, 1574 events. 1025/1574 cut-off events. For 1405/1405 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7044 event pairs, 2 based on Foata normal form. 24/1470 useless extension candidates. Maximal degree in co-relation 7111. Up to 393 conditions per place. [2023-11-17 12:07:34,450 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 151 selfloop transitions, 403 changer transitions 30/586 dead transitions. [2023-11-17 12:07:34,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 586 transitions, 5830 flow [2023-11-17 12:07:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:07:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:07:34,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 184 transitions. [2023-11-17 12:07:34,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23232323232323232 [2023-11-17 12:07:34,452 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 184 transitions. [2023-11-17 12:07:34,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 184 transitions. [2023-11-17 12:07:34,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:34,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 184 transitions. [2023-11-17 12:07:34,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 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 12:07:34,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 44.0) internal successors, (836), 19 states have internal predecessors, (836), 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 12:07:34,454 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 44.0) internal successors, (836), 19 states have internal predecessors, (836), 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 12:07:34,454 INFO L175 Difference]: Start difference. First operand has 97 places, 311 transitions, 2584 flow. Second operand 18 states and 184 transitions. [2023-11-17 12:07:34,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 586 transitions, 5830 flow [2023-11-17 12:07:34,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 586 transitions, 5407 flow, removed 207 selfloop flow, removed 3 redundant places. [2023-11-17 12:07:34,513 INFO L231 Difference]: Finished difference. Result has 119 places, 512 transitions, 5380 flow [2023-11-17 12:07:34,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2359, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5380, PETRI_PLACES=119, PETRI_TRANSITIONS=512} [2023-11-17 12:07:34,515 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 99 predicate places. [2023-11-17 12:07:34,515 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 512 transitions, 5380 flow [2023-11-17 12:07:34,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.176470588235294) internal successors, (122), 17 states have internal predecessors, (122), 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 12:07:34,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:34,515 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:34,524 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 12:07:34,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:34,725 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:07:34,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:34,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1301566540, now seen corresponding path program 5 times [2023-11-17 12:07:34,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:34,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682786867] [2023-11-17 12:07:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:34,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:35,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:35,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682786867] [2023-11-17 12:07:35,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682786867] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:35,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262132013] [2023-11-17 12:07:35,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:07:35,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:35,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:35,165 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 12:07:35,187 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 12:07:35,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:07:35,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:35,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 12:07:35,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:35,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:35,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262132013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:35,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:35,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-17 12:07:35,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504697506] [2023-11-17 12:07:35,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:35,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:07:35,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:35,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:07:35,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:07:35,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 44 [2023-11-17 12:07:35,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 512 transitions, 5380 flow. Second operand has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 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 12:07:35,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:35,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 44 [2023-11-17 12:07:35,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:37,424 INFO L124 PetriNetUnfolderBase]: 1317/2070 cut-off events. [2023-11-17 12:07:37,424 INFO L125 PetriNetUnfolderBase]: For 3838/3838 co-relation queries the response was YES. [2023-11-17 12:07:37,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11406 conditions, 2070 events. 1317/2070 cut-off events. For 3838/3838 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 10270 event pairs, 10 based on Foata normal form. 20/2070 useless extension candidates. Maximal degree in co-relation 11187. Up to 552 conditions per place. [2023-11-17 12:07:37,446 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 270 selfloop transitions, 486 changer transitions 26/784 dead transitions. [2023-11-17 12:07:37,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 784 transitions, 9187 flow [2023-11-17 12:07:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-17 12:07:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-17 12:07:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 382 transitions. [2023-11-17 12:07:37,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2284688995215311 [2023-11-17 12:07:37,450 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 382 transitions. [2023-11-17 12:07:37,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 382 transitions. [2023-11-17 12:07:37,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:37,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 382 transitions. [2023-11-17 12:07:37,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 10.052631578947368) internal successors, (382), 38 states have internal predecessors, (382), 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 12:07:37,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 44.0) internal successors, (1716), 39 states have internal predecessors, (1716), 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 12:07:37,459 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 44.0) internal successors, (1716), 39 states have internal predecessors, (1716), 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 12:07:37,459 INFO L175 Difference]: Start difference. First operand has 119 places, 512 transitions, 5380 flow. Second operand 38 states and 382 transitions. [2023-11-17 12:07:37,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 784 transitions, 9187 flow [2023-11-17 12:07:37,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 784 transitions, 8952 flow, removed 107 selfloop flow, removed 4 redundant places. [2023-11-17 12:07:37,568 INFO L231 Difference]: Finished difference. Result has 164 places, 684 transitions, 8789 flow [2023-11-17 12:07:37,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5192, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8789, PETRI_PLACES=164, PETRI_TRANSITIONS=684} [2023-11-17 12:07:37,570 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 144 predicate places. [2023-11-17 12:07:37,570 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 684 transitions, 8789 flow [2023-11-17 12:07:37,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 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 12:07:37,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:37,570 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:37,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 12:07:37,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:37,778 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:07:37,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:37,778 INFO L85 PathProgramCache]: Analyzing trace with hash 976291322, now seen corresponding path program 6 times [2023-11-17 12:07:37,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:37,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774219642] [2023-11-17 12:07:37,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:37,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:38,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:38,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774219642] [2023-11-17 12:07:38,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774219642] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:38,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62850014] [2023-11-17 12:07:38,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:07:38,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:38,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:38,172 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:07:38,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 12:07:38,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:07:38,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:38,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:07:38,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:38,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:38,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62850014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:38,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:38,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-17 12:07:38,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138575897] [2023-11-17 12:07:38,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:38,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:07:38,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:38,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:07:38,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:07:38,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 44 [2023-11-17 12:07:38,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 684 transitions, 8789 flow. Second operand has 19 states, 19 states have (on average 6.947368421052632) internal successors, (132), 19 states have internal predecessors, (132), 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 12:07:38,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:38,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 44 [2023-11-17 12:07:38,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:40,306 INFO L124 PetriNetUnfolderBase]: 1704/2661 cut-off events. [2023-11-17 12:07:40,307 INFO L125 PetriNetUnfolderBase]: For 9889/9889 co-relation queries the response was YES. [2023-11-17 12:07:40,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17089 conditions, 2661 events. 1704/2661 cut-off events. For 9889/9889 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 13644 event pairs, 20 based on Foata normal form. 17/2640 useless extension candidates. Maximal degree in co-relation 16854. Up to 693 conditions per place. [2023-11-17 12:07:40,345 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 162 selfloop transitions, 689 changer transitions 118/971 dead transitions. [2023-11-17 12:07:40,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 971 transitions, 13844 flow [2023-11-17 12:07:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:07:40,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:07:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 232 transitions. [2023-11-17 12:07:40,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2196969696969697 [2023-11-17 12:07:40,348 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 232 transitions. [2023-11-17 12:07:40,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 232 transitions. [2023-11-17 12:07:40,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:40,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 232 transitions. [2023-11-17 12:07:40,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 9.666666666666666) internal successors, (232), 24 states have internal predecessors, (232), 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 12:07:40,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 44.0) internal successors, (1100), 25 states have internal predecessors, (1100), 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 12:07:40,351 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 44.0) internal successors, (1100), 25 states have internal predecessors, (1100), 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 12:07:40,351 INFO L175 Difference]: Start difference. First operand has 164 places, 684 transitions, 8789 flow. Second operand 24 states and 232 transitions. [2023-11-17 12:07:40,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 971 transitions, 13844 flow [2023-11-17 12:07:40,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 971 transitions, 13510 flow, removed 109 selfloop flow, removed 8 redundant places. [2023-11-17 12:07:40,642 INFO L231 Difference]: Finished difference. Result has 189 places, 812 transitions, 12252 flow [2023-11-17 12:07:40,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8476, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12252, PETRI_PLACES=189, PETRI_TRANSITIONS=812} [2023-11-17 12:07:40,644 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 169 predicate places. [2023-11-17 12:07:40,644 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 812 transitions, 12252 flow [2023-11-17 12:07:40,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.947368421052632) internal successors, (132), 19 states have internal predecessors, (132), 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 12:07:40,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:40,644 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:40,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 12:07:40,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:40,851 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:07:40,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:40,852 INFO L85 PathProgramCache]: Analyzing trace with hash -63856899, now seen corresponding path program 7 times [2023-11-17 12:07:40,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:40,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080694779] [2023-11-17 12:07:40,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:40,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:07:41,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:41,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080694779] [2023-11-17 12:07:41,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080694779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:41,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880498319] [2023-11-17 12:07:41,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:07:41,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:41,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:41,223 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:07:41,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 12:07:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:41,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 12:07:41,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:41,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:07:41,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880498319] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:41,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:41,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 12 [2023-11-17 12:07:41,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29113529] [2023-11-17 12:07:41,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:41,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:07:41,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:41,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:07:41,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:07:41,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2023-11-17 12:07:41,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 812 transitions, 12252 flow. Second operand has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 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 12:07:41,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:41,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2023-11-17 12:07:41,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:42,237 INFO L124 PetriNetUnfolderBase]: 1276/2043 cut-off events. [2023-11-17 12:07:42,238 INFO L125 PetriNetUnfolderBase]: For 10242/10242 co-relation queries the response was YES. [2023-11-17 12:07:42,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14650 conditions, 2043 events. 1276/2043 cut-off events. For 10242/10242 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 10320 event pairs, 26 based on Foata normal form. 170/2211 useless extension candidates. Maximal degree in co-relation 14585. Up to 703 conditions per place. [2023-11-17 12:07:42,277 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 343 selfloop transitions, 378 changer transitions 8/731 dead transitions. [2023-11-17 12:07:42,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 731 transitions, 11889 flow [2023-11-17 12:07:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:07:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:07:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2023-11-17 12:07:42,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2818181818181818 [2023-11-17 12:07:42,279 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 124 transitions. [2023-11-17 12:07:42,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 124 transitions. [2023-11-17 12:07:42,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:42,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 124 transitions. [2023-11-17 12:07:42,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 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 12:07:42,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 44.0) internal successors, (484), 11 states have internal predecessors, (484), 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 12:07:42,281 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 44.0) internal successors, (484), 11 states have internal predecessors, (484), 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 12:07:42,281 INFO L175 Difference]: Start difference. First operand has 189 places, 812 transitions, 12252 flow. Second operand 10 states and 124 transitions. [2023-11-17 12:07:42,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 731 transitions, 11889 flow [2023-11-17 12:07:42,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 731 transitions, 11574 flow, removed 119 selfloop flow, removed 14 redundant places. [2023-11-17 12:07:42,530 INFO L231 Difference]: Finished difference. Result has 174 places, 702 transitions, 10577 flow [2023-11-17 12:07:42,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9969, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10577, PETRI_PLACES=174, PETRI_TRANSITIONS=702} [2023-11-17 12:07:42,532 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 154 predicate places. [2023-11-17 12:07:42,532 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 702 transitions, 10577 flow [2023-11-17 12:07:42,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 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 12:07:42,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:42,533 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:42,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 12:07:42,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:42,745 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:07:42,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:42,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1454416882, now seen corresponding path program 8 times [2023-11-17 12:07:42,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:42,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345877404] [2023-11-17 12:07:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:42,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:07:43,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:43,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345877404] [2023-11-17 12:07:43,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345877404] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:43,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183387007] [2023-11-17 12:07:43,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:07:43,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:43,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:43,089 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:07:43,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 12:07:43,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:07:43,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:43,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:07:43,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:07:43,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:07:43,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183387007] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:43,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:43,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-11-17 12:07:43,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108171759] [2023-11-17 12:07:43,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:43,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:07:43,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:43,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:07:43,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:07:43,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2023-11-17 12:07:43,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 702 transitions, 10577 flow. Second operand has 15 states, 15 states have (on average 11.466666666666667) internal successors, (172), 15 states have internal predecessors, (172), 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 12:07:43,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:43,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2023-11-17 12:07:43,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:44,052 INFO L124 PetriNetUnfolderBase]: 993/1635 cut-off events. [2023-11-17 12:07:44,052 INFO L125 PetriNetUnfolderBase]: For 8332/8332 co-relation queries the response was YES. [2023-11-17 12:07:44,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11492 conditions, 1635 events. 993/1635 cut-off events. For 8332/8332 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 8273 event pairs, 2 based on Foata normal form. 210/1843 useless extension candidates. Maximal degree in co-relation 11448. Up to 702 conditions per place. [2023-11-17 12:07:44,073 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 246 selfloop transitions, 283 changer transitions 35/566 dead transitions. [2023-11-17 12:07:44,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 566 transitions, 9314 flow [2023-11-17 12:07:44,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:07:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:07:44,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2023-11-17 12:07:44,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2023-11-17 12:07:44,075 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 112 transitions. [2023-11-17 12:07:44,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 112 transitions. [2023-11-17 12:07:44,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:44,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 112 transitions. [2023-11-17 12:07:44,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 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 12:07:44,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 44.0) internal successors, (396), 9 states have internal predecessors, (396), 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 12:07:44,076 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 44.0) internal successors, (396), 9 states have internal predecessors, (396), 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 12:07:44,076 INFO L175 Difference]: Start difference. First operand has 174 places, 702 transitions, 10577 flow. Second operand 8 states and 112 transitions. [2023-11-17 12:07:44,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 566 transitions, 9314 flow [2023-11-17 12:07:44,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 566 transitions, 8232 flow, removed 16 selfloop flow, removed 14 redundant places. [2023-11-17 12:07:44,228 INFO L231 Difference]: Finished difference. Result has 156 places, 518 transitions, 7127 flow [2023-11-17 12:07:44,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6956, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7127, PETRI_PLACES=156, PETRI_TRANSITIONS=518} [2023-11-17 12:07:44,229 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 136 predicate places. [2023-11-17 12:07:44,229 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 518 transitions, 7127 flow [2023-11-17 12:07:44,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.466666666666667) internal successors, (172), 15 states have internal predecessors, (172), 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 12:07:44,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:44,230 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:44,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 12:07:44,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-17 12:07:44,431 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:07:44,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:44,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1857499158, now seen corresponding path program 9 times [2023-11-17 12:07:44,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:44,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354862700] [2023-11-17 12:07:44,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:44,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:45,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:45,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354862700] [2023-11-17 12:07:45,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354862700] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:45,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935005613] [2023-11-17 12:07:45,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:07:45,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:45,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:45,113 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:07:45,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 12:07:45,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:07:45,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:45,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 12:07:45,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:45,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:46,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935005613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:46,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:46,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-17 12:07:46,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003986078] [2023-11-17 12:07:46,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:46,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 12:07:46,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:46,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 12:07:46,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2023-11-17 12:07:46,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 44 [2023-11-17 12:07:46,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 518 transitions, 7127 flow. Second operand has 27 states, 27 states have (on average 6.7407407407407405) internal successors, (182), 27 states have internal predecessors, (182), 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 12:07:46,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:46,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 44 [2023-11-17 12:07:46,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:47,674 INFO L124 PetriNetUnfolderBase]: 1677/2688 cut-off events. [2023-11-17 12:07:47,674 INFO L125 PetriNetUnfolderBase]: For 8999/8999 co-relation queries the response was YES. [2023-11-17 12:07:47,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17560 conditions, 2688 events. 1677/2688 cut-off events. For 8999/8999 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 14181 event pairs, 2 based on Foata normal form. 3/2689 useless extension candidates. Maximal degree in co-relation 17524. Up to 919 conditions per place. [2023-11-17 12:07:47,705 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 235 selfloop transitions, 698 changer transitions 99/1034 dead transitions. [2023-11-17 12:07:47,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 1034 transitions, 15107 flow [2023-11-17 12:07:47,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 12:07:47,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 12:07:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 266 transitions. [2023-11-17 12:07:47,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2239057239057239 [2023-11-17 12:07:47,708 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 266 transitions. [2023-11-17 12:07:47,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 266 transitions. [2023-11-17 12:07:47,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:47,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 266 transitions. [2023-11-17 12:07:47,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 9.851851851851851) internal successors, (266), 27 states have internal predecessors, (266), 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 12:07:47,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 44.0) internal successors, (1232), 28 states have internal predecessors, (1232), 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 12:07:47,711 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 44.0) internal successors, (1232), 28 states have internal predecessors, (1232), 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 12:07:47,711 INFO L175 Difference]: Start difference. First operand has 156 places, 518 transitions, 7127 flow. Second operand 27 states and 266 transitions. [2023-11-17 12:07:47,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 1034 transitions, 15107 flow [2023-11-17 12:07:48,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 1034 transitions, 14881 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-11-17 12:07:48,032 INFO L231 Difference]: Finished difference. Result has 184 places, 878 transitions, 13790 flow [2023-11-17 12:07:48,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6982, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13790, PETRI_PLACES=184, PETRI_TRANSITIONS=878} [2023-11-17 12:07:48,033 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 164 predicate places. [2023-11-17 12:07:48,033 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 878 transitions, 13790 flow [2023-11-17 12:07:48,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.7407407407407405) internal successors, (182), 27 states have internal predecessors, (182), 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 12:07:48,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:48,033 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:48,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 12:07:48,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:48,240 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:07:48,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:48,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1918407578, now seen corresponding path program 10 times [2023-11-17 12:07:48,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:48,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424971486] [2023-11-17 12:07:48,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:48,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:49,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:49,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424971486] [2023-11-17 12:07:49,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424971486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:49,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705993503] [2023-11-17 12:07:49,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:07:49,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:49,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:49,038 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:07:49,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 12:07:49,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:07:49,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:49,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 12:07:49,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:49,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:50,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705993503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:50,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:50,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-17 12:07:50,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774752176] [2023-11-17 12:07:50,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:50,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:07:50,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:50,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:07:50,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:07:50,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 44 [2023-11-17 12:07:50,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 878 transitions, 13790 flow. Second operand has 24 states, 24 states have (on average 6.958333333333333) internal successors, (167), 24 states have internal predecessors, (167), 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 12:07:50,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:50,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 44 [2023-11-17 12:07:50,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:52,145 INFO L124 PetriNetUnfolderBase]: 1987/3239 cut-off events. [2023-11-17 12:07:52,145 INFO L125 PetriNetUnfolderBase]: For 11692/11692 co-relation queries the response was YES. [2023-11-17 12:07:52,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24180 conditions, 3239 events. 1987/3239 cut-off events. For 11692/11692 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 18373 event pairs, 12 based on Foata normal form. 4/3241 useless extension candidates. Maximal degree in co-relation 24137. Up to 1153 conditions per place. [2023-11-17 12:07:52,166 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 0 selfloop transitions, 0 changer transitions 1230/1230 dead transitions. [2023-11-17 12:07:52,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 1230 transitions, 20920 flow [2023-11-17 12:07:52,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 12:07:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 12:07:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 312 transitions. [2023-11-17 12:07:52,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20855614973262032 [2023-11-17 12:07:52,169 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 312 transitions. [2023-11-17 12:07:52,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 312 transitions. [2023-11-17 12:07:52,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:52,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 312 transitions. [2023-11-17 12:07:52,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 9.176470588235293) internal successors, (312), 34 states have internal predecessors, (312), 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 12:07:52,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 44.0) internal successors, (1540), 35 states have internal predecessors, (1540), 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 12:07:52,172 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 44.0) internal successors, (1540), 35 states have internal predecessors, (1540), 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 12:07:52,172 INFO L175 Difference]: Start difference. First operand has 184 places, 878 transitions, 13790 flow. Second operand 34 states and 312 transitions. [2023-11-17 12:07:52,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 1230 transitions, 20920 flow [2023-11-17 12:07:52,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 1230 transitions, 20257 flow, removed 183 selfloop flow, removed 8 redundant places. [2023-11-17 12:07:52,521 INFO L231 Difference]: Finished difference. Result has 204 places, 0 transitions, 0 flow [2023-11-17 12:07:52,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13313, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=876, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=0, PETRI_PLACES=204, PETRI_TRANSITIONS=0} [2023-11-17 12:07:52,522 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 184 predicate places. [2023-11-17 12:07:52,522 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 0 transitions, 0 flow [2023-11-17 12:07:52,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.958333333333333) internal successors, (167), 24 states have internal predecessors, (167), 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 12:07:52,524 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 12:07:52,525 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 12:07:52,525 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 12:07:52,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 12:07:52,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 12:07:52,726 INFO L445 BasicCegarLoop]: Path program histogram: [10, 1, 1, 1] [2023-11-17 12:07:52,728 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:07:52,728 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:07:52,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:07:52 BasicIcfg [2023-11-17 12:07:52,732 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:07:52,732 INFO L158 Benchmark]: Toolchain (without parser) took 29129.69ms. Allocated memory was 287.3MB in the beginning and 596.6MB in the end (delta: 309.3MB). Free memory was 242.1MB in the beginning and 281.5MB in the end (delta: -39.4MB). Peak memory consumption was 365.8MB. Max. memory is 8.0GB. [2023-11-17 12:07:52,732 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 183.5MB. Free memory is still 138.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:07:52,733 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.48ms. Allocated memory is still 287.3MB. Free memory was 242.1MB in the beginning and 230.9MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 12:07:52,733 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.27ms. Allocated memory is still 287.3MB. Free memory was 230.9MB in the beginning and 229.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:07:52,733 INFO L158 Benchmark]: Boogie Preprocessor took 26.42ms. Allocated memory is still 287.3MB. Free memory was 229.2MB in the beginning and 227.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:07:52,733 INFO L158 Benchmark]: RCFGBuilder took 457.45ms. Allocated memory is still 287.3MB. Free memory was 227.8MB in the beginning and 204.1MB in the end (delta: 23.7MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. [2023-11-17 12:07:52,734 INFO L158 Benchmark]: TraceAbstraction took 28411.53ms. Allocated memory was 287.3MB in the beginning and 596.6MB in the end (delta: 309.3MB). Free memory was 203.4MB in the beginning and 281.5MB in the end (delta: -78.1MB). Peak memory consumption was 327.0MB. Max. memory is 8.0GB. [2023-11-17 12:07:52,735 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 183.5MB. Free memory is still 138.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 198.48ms. Allocated memory is still 287.3MB. Free memory was 242.1MB in the beginning and 230.9MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 30.27ms. Allocated memory is still 287.3MB. Free memory was 230.9MB in the beginning and 229.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.42ms. Allocated memory is still 287.3MB. Free memory was 229.2MB in the beginning and 227.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 457.45ms. Allocated memory is still 287.3MB. Free memory was 227.8MB in the beginning and 204.1MB in the end (delta: 23.7MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. * TraceAbstraction took 28411.53ms. Allocated memory was 287.3MB in the beginning and 596.6MB in the end (delta: 309.3MB). Free memory was 203.4MB in the beginning and 281.5MB in the end (delta: -78.1MB). Peak memory consumption was 327.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 29 PlacesBefore, 20 PlacesAfterwards, 26 TransitionsBefore, 15 TransitionsAfterwards, 224 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 8 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 2 ChoiceCompositions, 15 TotalNumberOfCompositions, 244 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 244, independent: 244, independent conditional: 0, independent unconditional: 244, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 156, independent: 156, independent conditional: 0, independent unconditional: 156, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 156, independent: 148, independent conditional: 0, independent unconditional: 148, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, independent: 8, independent conditional: 0, independent unconditional: 8, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 20, independent: 20, independent conditional: 0, independent unconditional: 20, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 244, independent: 88, independent conditional: 0, independent unconditional: 88, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 156, unknown conditional: 0, unknown unconditional: 156] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 101]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 42 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 28.3s, OverallIterations: 13, TraceHistogramMax: 4, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 13.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1248 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1248 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 429 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2981 IncrementalHoareTripleChecker+Invalid, 3410 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 429 mSolverCounterUnsat, 0 mSDtfsCounter, 2981 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 556 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3387 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13790occurred in iteration=12, InterpolantAutomatonStates: 238, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 10.2s InterpolantComputationTime, 389 NumberOfCodeBlocks, 389 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 530 ConstructedInterpolants, 0 QuantifiedInterpolants, 6021 SizeOfPredicates, 80 NumberOfNonLiveVariables, 1224 ConjunctsInSsa, 138 ConjunctsInUnsatCore, 33 InterpolantComputations, 3 PerfectInterpolantSequences, 21/230 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-17 12:07:52,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...