/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/01b_inc-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:05:09,881 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:05:09,947 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 15:05:09,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:05:09,971 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:05:09,972 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:05:09,972 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:05:09,972 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:05:09,973 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:05:09,975 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:05:09,976 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:05:09,976 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:05:09,976 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:05:09,977 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:05:09,977 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:05:09,977 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:05:09,978 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:05:09,978 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:05:09,978 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:05:09,978 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:05:09,978 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:05:09,979 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:05:09,979 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:05:09,979 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:05:09,980 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:05:09,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:05:09,980 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:05:09,980 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:05:09,981 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:05:09,981 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:05:09,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:05:09,982 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:05:09,982 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:05:10,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:05:10,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:05:10,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:05:10,193 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:05:10,193 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:05:10,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc-pthread.i [2023-11-17 15:05:11,110 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:05:11,294 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:05:11,295 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc-pthread.i [2023-11-17 15:05:11,303 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb1556223/5ca5b9efc5ef4c308cfbb2985f4bf7e2/FLAGe1c82cf9e [2023-11-17 15:05:11,317 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb1556223/5ca5b9efc5ef4c308cfbb2985f4bf7e2 [2023-11-17 15:05:11,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:05:11,320 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:05:11,322 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:05:11,322 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:05:11,325 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:05:11,326 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:05:11" (1/1) ... [2023-11-17 15:05:11,327 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f8032f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:11, skipping insertion in model container [2023-11-17 15:05:11,327 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:05:11" (1/1) ... [2023-11-17 15:05:11,364 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:05:11,582 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc-pthread.i[30747,30760] [2023-11-17 15:05:11,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:05:11,598 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:05:11,636 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc-pthread.i[30747,30760] [2023-11-17 15:05:11,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:05:11,663 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:05:11,664 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:05:11,669 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:05:11,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:11 WrapperNode [2023-11-17 15:05:11,669 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:05:11,670 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:05:11,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:05:11,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:05:11,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:11" (1/1) ... [2023-11-17 15:05:11,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:11" (1/1) ... [2023-11-17 15:05:11,700 INFO L138 Inliner]: procedures = 164, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2023-11-17 15:05:11,700 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:05:11,700 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:05:11,701 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:05:11,701 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:05:11,734 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:11" (1/1) ... [2023-11-17 15:05:11,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:11" (1/1) ... [2023-11-17 15:05:11,735 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:11" (1/1) ... [2023-11-17 15:05:11,736 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:11" (1/1) ... [2023-11-17 15:05:11,738 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:11" (1/1) ... [2023-11-17 15:05:11,740 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:11" (1/1) ... [2023-11-17 15:05:11,742 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:11" (1/1) ... [2023-11-17 15:05:11,742 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:11" (1/1) ... [2023-11-17 15:05:11,744 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:05:11,744 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:05:11,744 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:05:11,744 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:05:11,745 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:11" (1/1) ... [2023-11-17 15:05:11,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:05:11,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:05:11,772 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 15:05:11,785 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 15:05:11,792 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:05:11,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:05:11,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:05:11,792 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:05:11,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:05:11,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:05:11,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:05:11,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:05:11,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:05:11,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:05:11,793 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:05:11,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:05:11,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:05:11,794 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 15:05:11,877 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:05:11,878 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:05:11,962 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:05:12,001 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:05:12,002 INFO L307 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-17 15:05:12,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:05:12 BoogieIcfgContainer [2023-11-17 15:05:12,003 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:05:12,006 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:05:12,006 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:05:12,008 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:05:12,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:05:11" (1/3) ... [2023-11-17 15:05:12,008 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782c0773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:05:12, skipping insertion in model container [2023-11-17 15:05:12,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:05:11" (2/3) ... [2023-11-17 15:05:12,009 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782c0773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:05:12, skipping insertion in model container [2023-11-17 15:05:12,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:05:12" (3/3) ... [2023-11-17 15:05:12,009 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc-pthread.i [2023-11-17 15:05:12,021 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:05:12,021 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:05:12,021 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:05:12,055 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:05:12,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 50 transitions, 104 flow [2023-11-17 15:05:12,099 INFO L124 PetriNetUnfolderBase]: 4/61 cut-off events. [2023-11-17 15:05:12,099 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:05:12,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 61 events. 4/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 31. Up to 4 conditions per place. [2023-11-17 15:05:12,103 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 50 transitions, 104 flow [2023-11-17 15:05:12,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 50 transitions, 104 flow [2023-11-17 15:05:12,107 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:05:12,115 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 50 places, 50 transitions, 104 flow [2023-11-17 15:05:12,117 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 50 places, 50 transitions, 104 flow [2023-11-17 15:05:12,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 50 transitions, 104 flow [2023-11-17 15:05:12,128 INFO L124 PetriNetUnfolderBase]: 4/61 cut-off events. [2023-11-17 15:05:12,128 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:05:12,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 61 events. 4/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 31. Up to 4 conditions per place. [2023-11-17 15:05:12,130 INFO L119 LiptonReduction]: Number of co-enabled transitions 504 [2023-11-17 15:05:13,449 INFO L134 LiptonReduction]: Checked pairs total: 391 [2023-11-17 15:05:13,449 INFO L136 LiptonReduction]: Total number of compositions: 49 [2023-11-17 15:05:13,460 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:05:13,464 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;@26dca0ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:05:13,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:05:13,466 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:05:13,466 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:05:13,466 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:05:13,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:13,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:05:13,467 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:05:13,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:13,471 INFO L85 PathProgramCache]: Analyzing trace with hash 7278910, now seen corresponding path program 1 times [2023-11-17 15:05:13,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:13,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372720279] [2023-11-17 15:05:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:13,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:05:13,594 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 15:05:13,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:05:13,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372720279] [2023-11-17 15:05:13,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372720279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:05:13,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:05:13,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:05:13,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696065086] [2023-11-17 15:05:13,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:05:13,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:05:13,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:05:13,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:05:13,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:05:13,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 99 [2023-11-17 15:05:13,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 20 flow. Second operand has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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 15:05:13,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:05:13,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 99 [2023-11-17 15:05:13,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:05:13,634 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-17 15:05:13,635 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:05:13,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-11-17 15:05:13,636 INFO L140 encePairwiseOnDemand]: 97/99 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-11-17 15:05:13,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 26 flow [2023-11-17 15:05:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:05:13,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:05:13,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 89 transitions. [2023-11-17 15:05:13,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2023-11-17 15:05:13,652 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 89 transitions. [2023-11-17 15:05:13,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 89 transitions. [2023-11-17 15:05:13,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:05:13,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 89 transitions. [2023-11-17 15:05:13,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 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 15:05:13,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 15:05:13,658 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 15:05:13,659 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 20 flow. Second operand 2 states and 89 transitions. [2023-11-17 15:05:13,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 26 flow [2023-11-17 15:05:13,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 26 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:05:13,664 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 16 flow [2023-11-17 15:05:13,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=16, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-11-17 15:05:13,669 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-11-17 15:05:13,670 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 16 flow [2023-11-17 15:05:13,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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 15:05:13,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:13,670 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:05:13,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:05:13,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:05:13,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1594919068, now seen corresponding path program 1 times [2023-11-17 15:05:13,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:13,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128488610] [2023-11-17 15:05:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:13,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:05:13,716 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:05:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:05:13,747 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:05:13,747 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:05:13,748 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:05:13,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:05:13,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:05:13,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:05:13,751 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:05:13,753 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:05:13,753 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:05:13,775 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:05:13,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 69 transitions, 148 flow [2023-11-17 15:05:13,802 INFO L124 PetriNetUnfolderBase]: 7/93 cut-off events. [2023-11-17 15:05:13,802 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:05:13,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 93 events. 7/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 172 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 62. Up to 6 conditions per place. [2023-11-17 15:05:13,804 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 69 transitions, 148 flow [2023-11-17 15:05:13,804 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 69 transitions, 148 flow [2023-11-17 15:05:13,804 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:05:13,805 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 69 transitions, 148 flow [2023-11-17 15:05:13,805 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 69 transitions, 148 flow [2023-11-17 15:05:13,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 69 transitions, 148 flow [2023-11-17 15:05:13,818 INFO L124 PetriNetUnfolderBase]: 7/93 cut-off events. [2023-11-17 15:05:13,819 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:05:13,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 93 events. 7/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 172 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 62. Up to 6 conditions per place. [2023-11-17 15:05:13,820 INFO L119 LiptonReduction]: Number of co-enabled transitions 1692 [2023-11-17 15:05:14,850 INFO L134 LiptonReduction]: Checked pairs total: 4378 [2023-11-17 15:05:14,851 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-11-17 15:05:14,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:05:14,853 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;@26dca0ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:05:14,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:05:14,855 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:05:14,855 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-11-17 15:05:14,855 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:05:14,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:14,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:05:14,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:05:14,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:14,856 INFO L85 PathProgramCache]: Analyzing trace with hash 605723942, now seen corresponding path program 1 times [2023-11-17 15:05:14,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:14,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278041211] [2023-11-17 15:05:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:14,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:05:15,031 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 15:05:15,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:05:15,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278041211] [2023-11-17 15:05:15,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278041211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:05:15,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:05:15,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:05:15,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992500283] [2023-11-17 15:05:15,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:05:15,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:05:15,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:05:15,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:05:15,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:05:15,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 119 [2023-11-17 15:05:15,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 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 15:05:15,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:05:15,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 119 [2023-11-17 15:05:15,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:05:15,198 INFO L124 PetriNetUnfolderBase]: 256/475 cut-off events. [2023-11-17 15:05:15,198 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-17 15:05:15,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 475 events. 256/475 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2517 event pairs, 53 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 884. Up to 148 conditions per place. [2023-11-17 15:05:15,201 INFO L140 encePairwiseOnDemand]: 110/119 looper letters, 43 selfloop transitions, 9 changer transitions 0/55 dead transitions. [2023-11-17 15:05:15,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 234 flow [2023-11-17 15:05:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:05:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:05:15,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 319 transitions. [2023-11-17 15:05:15,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44677871148459386 [2023-11-17 15:05:15,210 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 319 transitions. [2023-11-17 15:05:15,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 319 transitions. [2023-11-17 15:05:15,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:05:15,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 319 transitions. [2023-11-17 15:05:15,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.166666666666664) internal successors, (319), 6 states have internal predecessors, (319), 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 15:05:15,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 119.0) internal successors, (833), 7 states have internal predecessors, (833), 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 15:05:15,217 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 119.0) internal successors, (833), 7 states have internal predecessors, (833), 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 15:05:15,217 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 62 flow. Second operand 6 states and 319 transitions. [2023-11-17 15:05:15,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 234 flow [2023-11-17 15:05:15,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 55 transitions, 234 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:05:15,219 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 116 flow [2023-11-17 15:05:15,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-17 15:05:15,219 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-11-17 15:05:15,219 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 116 flow [2023-11-17 15:05:15,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 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 15:05:15,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:15,220 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:05:15,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:05:15,220 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:05:15,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:15,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1750652043, now seen corresponding path program 1 times [2023-11-17 15:05:15,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:15,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119736097] [2023-11-17 15:05:15,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:15,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:05:15,239 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:05:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:05:15,253 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:05:15,253 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:05:15,253 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:05:15,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:05:15,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:05:15,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:05:15,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:05:15,254 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:05:15,255 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:05:15,255 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:05:15,274 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:05:15,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 88 transitions, 194 flow [2023-11-17 15:05:15,286 INFO L124 PetriNetUnfolderBase]: 10/125 cut-off events. [2023-11-17 15:05:15,286 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:05:15,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 125 events. 10/125 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 272 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 97. Up to 8 conditions per place. [2023-11-17 15:05:15,288 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 88 transitions, 194 flow [2023-11-17 15:05:15,289 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 88 transitions, 194 flow [2023-11-17 15:05:15,289 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:05:15,289 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 88 transitions, 194 flow [2023-11-17 15:05:15,290 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 88 transitions, 194 flow [2023-11-17 15:05:15,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 88 transitions, 194 flow [2023-11-17 15:05:15,301 INFO L124 PetriNetUnfolderBase]: 10/125 cut-off events. [2023-11-17 15:05:15,301 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:05:15,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 125 events. 10/125 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 272 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 97. Up to 8 conditions per place. [2023-11-17 15:05:15,304 INFO L119 LiptonReduction]: Number of co-enabled transitions 3564 [2023-11-17 15:05:16,456 INFO L134 LiptonReduction]: Checked pairs total: 10546 [2023-11-17 15:05:16,456 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-11-17 15:05:16,458 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:05:16,458 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;@26dca0ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:05:16,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:05:16,460 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:05:16,460 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-11-17 15:05:16,460 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:05:16,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:16,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:05:16,460 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:05:16,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:16,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1916388408, now seen corresponding path program 1 times [2023-11-17 15:05:16,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:16,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712206349] [2023-11-17 15:05:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:16,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:05:16,597 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 15:05:16,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:05:16,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712206349] [2023-11-17 15:05:16,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712206349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:05:16,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:05:16,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:05:16,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293154440] [2023-11-17 15:05:16,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:05:16,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:05:16,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:05:16,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:05:16,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:05:16,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 149 [2023-11-17 15:05:16,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 52.8) internal successors, (264), 5 states have internal predecessors, (264), 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 15:05:16,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:05:16,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 149 [2023-11-17 15:05:16,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:05:17,123 INFO L124 PetriNetUnfolderBase]: 5256/7668 cut-off events. [2023-11-17 15:05:17,123 INFO L125 PetriNetUnfolderBase]: For 622/622 co-relation queries the response was YES. [2023-11-17 15:05:17,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15744 conditions, 7668 events. 5256/7668 cut-off events. For 622/622 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 47038 event pairs, 1315 based on Foata normal form. 0/6308 useless extension candidates. Maximal degree in co-relation 8306. Up to 3200 conditions per place. [2023-11-17 15:05:17,163 INFO L140 encePairwiseOnDemand]: 138/149 looper letters, 92 selfloop transitions, 12 changer transitions 0/107 dead transitions. [2023-11-17 15:05:17,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 107 transitions, 478 flow [2023-11-17 15:05:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:05:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:05:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 421 transitions. [2023-11-17 15:05:17,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470917225950783 [2023-11-17 15:05:17,165 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 421 transitions. [2023-11-17 15:05:17,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 421 transitions. [2023-11-17 15:05:17,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:05:17,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 421 transitions. [2023-11-17 15:05:17,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.16666666666667) internal successors, (421), 6 states have internal predecessors, (421), 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 15:05:17,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 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 15:05:17,169 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 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 15:05:17,169 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 90 flow. Second operand 6 states and 421 transitions. [2023-11-17 15:05:17,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 107 transitions, 478 flow [2023-11-17 15:05:17,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 107 transitions, 468 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-11-17 15:05:17,178 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 177 flow [2023-11-17 15:05:17,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=177, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-11-17 15:05:17,179 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-11-17 15:05:17,180 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 177 flow [2023-11-17 15:05:17,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.8) internal successors, (264), 5 states have internal predecessors, (264), 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 15:05:17,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:17,180 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:05:17,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:05:17,180 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:05:17,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:17,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1184205743, now seen corresponding path program 1 times [2023-11-17 15:05:17,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:17,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132430875] [2023-11-17 15:05:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:17,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:05:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:05:17,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:05:17,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132430875] [2023-11-17 15:05:17,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132430875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:05:17,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:05:17,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:05:17,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474645824] [2023-11-17 15:05:17,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:05:17,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:05:17,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:05:17,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:05:17,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:05:17,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 149 [2023-11-17 15:05:17,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 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 15:05:17,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:05:17,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 149 [2023-11-17 15:05:17,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:05:18,014 INFO L124 PetriNetUnfolderBase]: 7361/10903 cut-off events. [2023-11-17 15:05:18,014 INFO L125 PetriNetUnfolderBase]: For 3765/3765 co-relation queries the response was YES. [2023-11-17 15:05:18,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25524 conditions, 10903 events. 7361/10903 cut-off events. For 3765/3765 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 73313 event pairs, 2187 based on Foata normal form. 0/9933 useless extension candidates. Maximal degree in co-relation 18617. Up to 4998 conditions per place. [2023-11-17 15:05:18,074 INFO L140 encePairwiseOnDemand]: 142/149 looper letters, 97 selfloop transitions, 19 changer transitions 0/119 dead transitions. [2023-11-17 15:05:18,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 119 transitions, 651 flow [2023-11-17 15:05:18,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:05:18,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:05:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 410 transitions. [2023-11-17 15:05:18,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45861297539149887 [2023-11-17 15:05:18,076 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 410 transitions. [2023-11-17 15:05:18,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 410 transitions. [2023-11-17 15:05:18,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:05:18,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 410 transitions. [2023-11-17 15:05:18,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.33333333333333) internal successors, (410), 6 states have internal predecessors, (410), 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 15:05:18,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 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 15:05:18,079 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 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 15:05:18,079 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 177 flow. Second operand 6 states and 410 transitions. [2023-11-17 15:05:18,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 119 transitions, 651 flow [2023-11-17 15:05:18,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 119 transitions, 651 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:05:18,097 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 307 flow [2023-11-17 15:05:18,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=307, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-11-17 15:05:18,099 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2023-11-17 15:05:18,099 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 307 flow [2023-11-17 15:05:18,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 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 15:05:18,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:18,100 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:05:18,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:05:18,100 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:05:18,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:18,101 INFO L85 PathProgramCache]: Analyzing trace with hash -262192591, now seen corresponding path program 1 times [2023-11-17 15:05:18,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:18,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970134936] [2023-11-17 15:05:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:18,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:05:18,116 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:05:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:05:18,125 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:05:18,125 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:05:18,126 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:05:18,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:05:18,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:05:18,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:05:18,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:05:18,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:05:18,126 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:05:18,127 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:05:18,127 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:05:18,144 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:05:18,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 107 transitions, 242 flow [2023-11-17 15:05:18,157 INFO L124 PetriNetUnfolderBase]: 13/157 cut-off events. [2023-11-17 15:05:18,157 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:05:18,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 157 events. 13/157 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 355 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 133. Up to 10 conditions per place. [2023-11-17 15:05:18,157 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 107 transitions, 242 flow [2023-11-17 15:05:18,158 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 107 transitions, 242 flow [2023-11-17 15:05:18,158 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:05:18,158 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 107 transitions, 242 flow [2023-11-17 15:05:18,158 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 107 transitions, 242 flow [2023-11-17 15:05:18,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 107 transitions, 242 flow [2023-11-17 15:05:18,167 INFO L124 PetriNetUnfolderBase]: 13/157 cut-off events. [2023-11-17 15:05:18,167 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:05:18,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 157 events. 13/157 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 355 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 133. Up to 10 conditions per place. [2023-11-17 15:05:18,170 INFO L119 LiptonReduction]: Number of co-enabled transitions 6120 [2023-11-17 15:05:19,607 INFO L134 LiptonReduction]: Checked pairs total: 17920 [2023-11-17 15:05:19,608 INFO L136 LiptonReduction]: Total number of compositions: 75 [2023-11-17 15:05:19,609 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:05:19,609 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;@26dca0ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:05:19,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:05:19,611 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:05:19,611 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-11-17 15:05:19,611 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:05:19,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:19,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:05:19,611 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:05:19,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:19,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1473891832, now seen corresponding path program 1 times [2023-11-17 15:05:19,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:19,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454412450] [2023-11-17 15:05:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:19,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:05:19,715 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 15:05:19,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:05:19,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454412450] [2023-11-17 15:05:19,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454412450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:05:19,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:05:19,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:05:19,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716593634] [2023-11-17 15:05:19,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:05:19,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:05:19,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:05:19,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:05:19,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:05:19,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 182 [2023-11-17 15:05:19,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 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 15:05:19,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:05:19,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 182 [2023-11-17 15:05:19,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:05:24,434 INFO L124 PetriNetUnfolderBase]: 77874/102128 cut-off events. [2023-11-17 15:05:24,435 INFO L125 PetriNetUnfolderBase]: For 11600/11600 co-relation queries the response was YES. [2023-11-17 15:05:24,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210076 conditions, 102128 events. 77874/102128 cut-off events. For 11600/11600 co-relation queries the response was YES. Maximal size of possible extension queue 5190. Compared 661349 event pairs, 21367 based on Foata normal form. 0/82670 useless extension candidates. Maximal degree in co-relation 44210. Up to 46474 conditions per place. [2023-11-17 15:05:25,008 INFO L140 encePairwiseOnDemand]: 169/182 looper letters, 129 selfloop transitions, 15 changer transitions 0/147 dead transitions. [2023-11-17 15:05:25,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 147 transitions, 684 flow [2023-11-17 15:05:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:05:25,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:05:25,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 511 transitions. [2023-11-17 15:05:25,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2023-11-17 15:05:25,011 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 511 transitions. [2023-11-17 15:05:25,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 511 transitions. [2023-11-17 15:05:25,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:05:25,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 511 transitions. [2023-11-17 15:05:25,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 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 15:05:25,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 182.0) internal successors, (1274), 7 states have internal predecessors, (1274), 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 15:05:25,014 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 182.0) internal successors, (1274), 7 states have internal predecessors, (1274), 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 15:05:25,014 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 120 flow. Second operand 6 states and 511 transitions. [2023-11-17 15:05:25,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 147 transitions, 684 flow [2023-11-17 15:05:25,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 147 transitions, 654 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-11-17 15:05:25,021 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 230 flow [2023-11-17 15:05:25,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-11-17 15:05:25,022 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2023-11-17 15:05:25,023 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 230 flow [2023-11-17 15:05:25,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 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 15:05:25,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:25,023 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:05:25,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:05:25,023 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:05:25,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:25,023 INFO L85 PathProgramCache]: Analyzing trace with hash 665611290, now seen corresponding path program 1 times [2023-11-17 15:05:25,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:25,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838625645] [2023-11-17 15:05:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:25,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:05:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:05:25,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:05:25,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838625645] [2023-11-17 15:05:25,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838625645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:05:25,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:05:25,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:05:25,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910064535] [2023-11-17 15:05:25,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:05:25,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:05:25,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:05:25,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:05:25,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:05:25,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 182 [2023-11-17 15:05:25,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 61.0) internal successors, (305), 5 states have internal predecessors, (305), 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 15:05:25,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:05:25,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 182 [2023-11-17 15:05:25,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:05:33,718 INFO L124 PetriNetUnfolderBase]: 124153/164211 cut-off events. [2023-11-17 15:05:33,718 INFO L125 PetriNetUnfolderBase]: For 64053/64053 co-relation queries the response was YES. [2023-11-17 15:05:34,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386593 conditions, 164211 events. 124153/164211 cut-off events. For 64053/64053 co-relation queries the response was YES. Maximal size of possible extension queue 8439. Compared 1155789 event pairs, 38229 based on Foata normal form. 0/148787 useless extension candidates. Maximal degree in co-relation 216133. Up to 79252 conditions per place. [2023-11-17 15:05:34,813 INFO L140 encePairwiseOnDemand]: 174/182 looper letters, 140 selfloop transitions, 25 changer transitions 0/168 dead transitions. [2023-11-17 15:05:34,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 168 transitions, 923 flow [2023-11-17 15:05:34,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:05:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:05:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 498 transitions. [2023-11-17 15:05:34,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2023-11-17 15:05:34,815 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 498 transitions. [2023-11-17 15:05:34,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 498 transitions. [2023-11-17 15:05:34,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:05:34,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 498 transitions. [2023-11-17 15:05:34,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 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 15:05:34,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 182.0) internal successors, (1274), 7 states have internal predecessors, (1274), 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 15:05:34,819 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 182.0) internal successors, (1274), 7 states have internal predecessors, (1274), 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 15:05:34,819 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 230 flow. Second operand 6 states and 498 transitions. [2023-11-17 15:05:34,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 168 transitions, 923 flow [2023-11-17 15:05:35,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 168 transitions, 923 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:05:35,413 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 401 flow [2023-11-17 15:05:35,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=401, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2023-11-17 15:05:35,414 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-11-17 15:05:35,414 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 401 flow [2023-11-17 15:05:35,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.0) internal successors, (305), 5 states have internal predecessors, (305), 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 15:05:35,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:35,414 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:05:35,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:05:35,414 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:05:35,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:35,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2134284484, now seen corresponding path program 1 times [2023-11-17 15:05:35,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:35,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096340048] [2023-11-17 15:05:35,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:35,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:05:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:05:35,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:05:35,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096340048] [2023-11-17 15:05:35,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096340048] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:05:35,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:05:35,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:05:35,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833715316] [2023-11-17 15:05:35,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:05:35,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:05:35,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:05:35,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:05:35,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:05:35,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 182 [2023-11-17 15:05:35,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 401 flow. Second operand has 5 states, 5 states have (on average 61.2) internal successors, (306), 5 states have internal predecessors, (306), 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 15:05:35,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:05:35,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 182 [2023-11-17 15:05:35,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:05:49,450 INFO L124 PetriNetUnfolderBase]: 188457/251259 cut-off events. [2023-11-17 15:05:49,451 INFO L125 PetriNetUnfolderBase]: For 165101/165101 co-relation queries the response was YES. [2023-11-17 15:05:50,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634245 conditions, 251259 events. 188457/251259 cut-off events. For 165101/165101 co-relation queries the response was YES. Maximal size of possible extension queue 13093. Compared 1890879 event pairs, 61281 based on Foata normal form. 0/234140 useless extension candidates. Maximal degree in co-relation 401049. Up to 126840 conditions per place. [2023-11-17 15:05:51,060 INFO L140 encePairwiseOnDemand]: 174/182 looper letters, 153 selfloop transitions, 37 changer transitions 0/193 dead transitions. [2023-11-17 15:05:51,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 193 transitions, 1299 flow [2023-11-17 15:05:51,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:05:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:05:51,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 495 transitions. [2023-11-17 15:05:51,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532967032967033 [2023-11-17 15:05:51,069 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 495 transitions. [2023-11-17 15:05:51,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 495 transitions. [2023-11-17 15:05:51,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:05:51,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 495 transitions. [2023-11-17 15:05:51,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.5) internal successors, (495), 6 states have internal predecessors, (495), 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 15:05:51,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 182.0) internal successors, (1274), 7 states have internal predecessors, (1274), 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 15:05:51,082 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 182.0) internal successors, (1274), 7 states have internal predecessors, (1274), 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 15:05:51,082 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 401 flow. Second operand 6 states and 495 transitions. [2023-11-17 15:05:51,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 193 transitions, 1299 flow [2023-11-17 15:05:52,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 193 transitions, 1299 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:05:52,212 INFO L231 Difference]: Finished difference. Result has 73 places, 100 transitions, 703 flow [2023-11-17 15:05:52,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=703, PETRI_PLACES=73, PETRI_TRANSITIONS=100} [2023-11-17 15:05:52,213 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2023-11-17 15:05:52,213 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 100 transitions, 703 flow [2023-11-17 15:05:52,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.2) internal successors, (306), 5 states have internal predecessors, (306), 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 15:05:52,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:52,213 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:05:52,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:05:52,213 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:05:52,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:52,214 INFO L85 PathProgramCache]: Analyzing trace with hash -896525691, now seen corresponding path program 1 times [2023-11-17 15:05:52,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:52,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717910176] [2023-11-17 15:05:52,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:52,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:05:52,297 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 15:05:52,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:05:52,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717910176] [2023-11-17 15:05:52,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717910176] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:05:52,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321790521] [2023-11-17 15:05:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:52,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:05:52,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:05:52,301 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 15:05:52,312 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 15:05:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:05:52,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 15:05:52,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:05:52,486 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 15:05:52,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:05:52,613 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 15:05:52,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321790521] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:05:52,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:05:52,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2023-11-17 15:05:52,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783107734] [2023-11-17 15:05:52,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:05:52,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 15:05:52,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:05:52,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 15:05:52,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-17 15:05:52,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 182 [2023-11-17 15:05:52,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 100 transitions, 703 flow. Second operand has 14 states, 14 states have (on average 60.142857142857146) internal successors, (842), 14 states have internal predecessors, (842), 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 15:05:52,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:05:52,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 182 [2023-11-17 15:05:52,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand