/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/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:30:12,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:30:12,905 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 16:30:12,921 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:30:12,921 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:30:12,922 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:30:12,922 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:30:12,922 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:30:12,923 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:30:12,923 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:30:12,923 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:30:12,923 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:30:12,924 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:30:12,924 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:30:12,924 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:30:12,924 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:30:12,925 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:30:12,925 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:30:12,925 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:30:12,925 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:30:12,926 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:30:12,926 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:30:12,926 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:30:12,927 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:30:12,927 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:30:12,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:30:12,927 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:30:12,927 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:30:12,928 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:30:12,928 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:30:12,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:30:12,928 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:30:12,928 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:30:13,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:30:13,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:30:13,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:30:13,134 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:30:13,135 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:30:13,135 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2023-11-17 16:30:14,114 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:30:14,282 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:30:14,283 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2023-11-17 16:30:14,288 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/332af4cc9/6eeabea8e9c34fe2b78d19c68377dc74/FLAGa24beade1 [2023-11-17 16:30:14,302 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/332af4cc9/6eeabea8e9c34fe2b78d19c68377dc74 [2023-11-17 16:30:14,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:30:14,306 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:30:14,307 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:30:14,307 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:30:14,310 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:30:14,311 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:30:14" (1/1) ... [2023-11-17 16:30:14,311 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34462799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:14, skipping insertion in model container [2023-11-17 16:30:14,312 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:30:14" (1/1) ... [2023-11-17 16:30:14,330 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:30:14,465 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2663,2676] [2023-11-17 16:30:14,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:30:14,474 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:30:14,497 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2663,2676] [2023-11-17 16:30:14,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:30:14,505 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:30:14,506 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:30:14,510 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:30:14,510 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:14 WrapperNode [2023-11-17 16:30:14,511 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:30:14,511 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:30:14,511 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:30:14,512 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:30:14,516 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:14" (1/1) ... [2023-11-17 16:30:14,529 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:14" (1/1) ... [2023-11-17 16:30:14,549 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 138 [2023-11-17 16:30:14,549 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:30:14,550 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:30:14,550 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:30:14,550 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:30:14,556 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:14" (1/1) ... [2023-11-17 16:30:14,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:14" (1/1) ... [2023-11-17 16:30:14,558 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:14" (1/1) ... [2023-11-17 16:30:14,558 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:14" (1/1) ... [2023-11-17 16:30:14,563 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:14" (1/1) ... [2023-11-17 16:30:14,565 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:14" (1/1) ... [2023-11-17 16:30:14,566 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:14" (1/1) ... [2023-11-17 16:30:14,567 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:14" (1/1) ... [2023-11-17 16:30:14,569 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:30:14,569 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:30:14,569 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:30:14,569 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:30:14,570 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:14" (1/1) ... [2023-11-17 16:30:14,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:30:14,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:14,597 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 16:30:14,602 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 16:30:14,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:30:14,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:30:14,621 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:30:14,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:30:14,621 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:30:14,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:30:14,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:30:14,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 16:30:14,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 16:30:14,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:30:14,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:30:14,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:30:14,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:30:14,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:30:14,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:30:14,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:30:14,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:30:14,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:30:14,668 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 16:30:14,768 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:30:14,769 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:30:15,002 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:30:15,059 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:30:15,059 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 16:30:15,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:30:15 BoogieIcfgContainer [2023-11-17 16:30:15,060 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:30:15,064 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:30:15,064 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:30:15,066 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:30:15,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:30:14" (1/3) ... [2023-11-17 16:30:15,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55101622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:30:15, skipping insertion in model container [2023-11-17 16:30:15,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:30:14" (2/3) ... [2023-11-17 16:30:15,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55101622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:30:15, skipping insertion in model container [2023-11-17 16:30:15,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:30:15" (3/3) ... [2023-11-17 16:30:15,068 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2023-11-17 16:30:15,081 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:30:15,081 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:30:15,081 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:30:15,132 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 16:30:15,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 135 transitions, 298 flow [2023-11-17 16:30:15,192 INFO L124 PetriNetUnfolderBase]: 10/131 cut-off events. [2023-11-17 16:30:15,192 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:30:15,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 131 events. 10/131 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-11-17 16:30:15,200 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 135 transitions, 298 flow [2023-11-17 16:30:15,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 118 transitions, 260 flow [2023-11-17 16:30:15,208 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:30:15,220 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 118 transitions, 260 flow [2023-11-17 16:30:15,225 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 118 transitions, 260 flow [2023-11-17 16:30:15,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 118 transitions, 260 flow [2023-11-17 16:30:15,252 INFO L124 PetriNetUnfolderBase]: 10/118 cut-off events. [2023-11-17 16:30:15,252 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:30:15,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 118 events. 10/118 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-11-17 16:30:15,254 INFO L119 LiptonReduction]: Number of co-enabled transitions 1512 [2023-11-17 16:30:18,859 INFO L134 LiptonReduction]: Checked pairs total: 1771 [2023-11-17 16:30:18,859 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-11-17 16:30:18,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:30:18,874 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;@665c340a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:30:18,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 16:30:18,880 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:30:18,880 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-11-17 16:30:18,880 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:30:18,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:18,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:18,881 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:18,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:18,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1880220253, now seen corresponding path program 1 times [2023-11-17 16:30:18,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:18,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794031242] [2023-11-17 16:30:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:18,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:19,081 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 16:30:19,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:19,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794031242] [2023-11-17 16:30:19,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794031242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:30:19,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:30:19,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:30:19,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328240077] [2023-11-17 16:30:19,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:19,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:30:19,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:19,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:30:19,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:30:19,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 239 [2023-11-17 16:30:19,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 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 16:30:19,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:19,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 239 [2023-11-17 16:30:19,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:19,280 INFO L124 PetriNetUnfolderBase]: 1343/1736 cut-off events. [2023-11-17 16:30:19,281 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2023-11-17 16:30:19,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3612 conditions, 1736 events. 1343/1736 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5850 event pairs, 215 based on Foata normal form. 1/1055 useless extension candidates. Maximal degree in co-relation 2691. Up to 1515 conditions per place. [2023-11-17 16:30:19,289 INFO L140 encePairwiseOnDemand]: 233/239 looper letters, 39 selfloop transitions, 3 changer transitions 3/49 dead transitions. [2023-11-17 16:30:19,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 233 flow [2023-11-17 16:30:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:30:19,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:30:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-11-17 16:30:19,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439330543933054 [2023-11-17 16:30:19,300 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-11-17 16:30:19,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-11-17 16:30:19,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:19,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-11-17 16:30:19,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 16:30:19,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 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 16:30:19,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 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 16:30:19,309 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 390 transitions. [2023-11-17 16:30:19,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 233 flow [2023-11-17 16:30:19,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 49 transitions, 203 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 16:30:19,314 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 89 flow [2023-11-17 16:30:19,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-17 16:30:19,317 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-11-17 16:30:19,317 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 89 flow [2023-11-17 16:30:19,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 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 16:30:19,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:19,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:19,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:30:19,318 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:19,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:19,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1316446695, now seen corresponding path program 1 times [2023-11-17 16:30:19,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:19,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61782809] [2023-11-17 16:30:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:19,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:19,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:19,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61782809] [2023-11-17 16:30:19,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61782809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:30:19,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:30:19,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:30:19,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576750339] [2023-11-17 16:30:19,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:19,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:30:19,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:19,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:30:19,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:30:19,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 239 [2023-11-17 16:30:19,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 89 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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 16:30:19,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:19,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 239 [2023-11-17 16:30:19,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:19,689 INFO L124 PetriNetUnfolderBase]: 1525/1989 cut-off events. [2023-11-17 16:30:19,689 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2023-11-17 16:30:19,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4844 conditions, 1989 events. 1525/1989 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7038 event pairs, 235 based on Foata normal form. 24/2013 useless extension candidates. Maximal degree in co-relation 1187. Up to 1479 conditions per place. [2023-11-17 16:30:19,700 INFO L140 encePairwiseOnDemand]: 234/239 looper letters, 55 selfloop transitions, 5 changer transitions 14/78 dead transitions. [2023-11-17 16:30:19,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 78 transitions, 357 flow [2023-11-17 16:30:19,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:30:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:30:19,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 600 transitions. [2023-11-17 16:30:19,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502092050209205 [2023-11-17 16:30:19,705 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 600 transitions. [2023-11-17 16:30:19,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 600 transitions. [2023-11-17 16:30:19,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:19,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 600 transitions. [2023-11-17 16:30:19,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 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 16:30:19,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 239.0) internal successors, (1434), 6 states have internal predecessors, (1434), 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 16:30:19,710 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 239.0) internal successors, (1434), 6 states have internal predecessors, (1434), 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 16:30:19,710 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 89 flow. Second operand 5 states and 600 transitions. [2023-11-17 16:30:19,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 78 transitions, 357 flow [2023-11-17 16:30:19,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 78 transitions, 353 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:30:19,712 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 110 flow [2023-11-17 16:30:19,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2023-11-17 16:30:19,713 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-11-17 16:30:19,713 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 110 flow [2023-11-17 16:30:19,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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 16:30:19,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:19,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:19,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:30:19,720 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:19,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash -56610990, now seen corresponding path program 1 times [2023-11-17 16:30:19,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:19,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932922279] [2023-11-17 16:30:19,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:19,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:19,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:19,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932922279] [2023-11-17 16:30:19,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932922279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:30:19,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:30:19,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:30:19,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974349882] [2023-11-17 16:30:19,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:19,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:30:19,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:19,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:30:19,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:30:19,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 239 [2023-11-17 16:30:19,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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 16:30:19,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:19,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 239 [2023-11-17 16:30:19,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:20,112 INFO L124 PetriNetUnfolderBase]: 1731/2313 cut-off events. [2023-11-17 16:30:20,112 INFO L125 PetriNetUnfolderBase]: For 1136/1138 co-relation queries the response was YES. [2023-11-17 16:30:20,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6086 conditions, 2313 events. 1731/2313 cut-off events. For 1136/1138 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9069 event pairs, 87 based on Foata normal form. 64/2375 useless extension candidates. Maximal degree in co-relation 2981. Up to 891 conditions per place. [2023-11-17 16:30:20,123 INFO L140 encePairwiseOnDemand]: 234/239 looper letters, 70 selfloop transitions, 6 changer transitions 1/81 dead transitions. [2023-11-17 16:30:20,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 81 transitions, 411 flow [2023-11-17 16:30:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:30:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:30:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 597 transitions. [2023-11-17 16:30:20,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.499581589958159 [2023-11-17 16:30:20,125 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 597 transitions. [2023-11-17 16:30:20,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 597 transitions. [2023-11-17 16:30:20,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:20,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 597 transitions. [2023-11-17 16:30:20,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.4) internal successors, (597), 5 states have internal predecessors, (597), 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 16:30:20,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 239.0) internal successors, (1434), 6 states have internal predecessors, (1434), 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 16:30:20,129 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 239.0) internal successors, (1434), 6 states have internal predecessors, (1434), 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 16:30:20,129 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 110 flow. Second operand 5 states and 597 transitions. [2023-11-17 16:30:20,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 81 transitions, 411 flow [2023-11-17 16:30:20,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 81 transitions, 402 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 16:30:20,131 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 154 flow [2023-11-17 16:30:20,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-11-17 16:30:20,131 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-11-17 16:30:20,131 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 154 flow [2023-11-17 16:30:20,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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 16:30:20,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:20,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:20,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:30:20,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:20,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:20,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1730880916, now seen corresponding path program 2 times [2023-11-17 16:30:20,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:20,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350223124] [2023-11-17 16:30:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:20,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:20,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:20,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350223124] [2023-11-17 16:30:20,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350223124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:30:20,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:30:20,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:30:20,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562651084] [2023-11-17 16:30:20,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:20,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:30:20,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:20,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:30:20,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:30:20,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 239 [2023-11-17 16:30:20,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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 16:30:20,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:20,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 239 [2023-11-17 16:30:20,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:20,392 INFO L124 PetriNetUnfolderBase]: 1659/2243 cut-off events. [2023-11-17 16:30:20,392 INFO L125 PetriNetUnfolderBase]: For 2091/2091 co-relation queries the response was YES. [2023-11-17 16:30:20,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7025 conditions, 2243 events. 1659/2243 cut-off events. For 2091/2091 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 8846 event pairs, 303 based on Foata normal form. 100/2331 useless extension candidates. Maximal degree in co-relation 1382. Up to 1353 conditions per place. [2023-11-17 16:30:20,403 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 61 selfloop transitions, 5 changer transitions 10/80 dead transitions. [2023-11-17 16:30:20,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 80 transitions, 464 flow [2023-11-17 16:30:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:30:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:30:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 484 transitions. [2023-11-17 16:30:20,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062761506276151 [2023-11-17 16:30:20,418 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 484 transitions. [2023-11-17 16:30:20,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 484 transitions. [2023-11-17 16:30:20,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:20,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 484 transitions. [2023-11-17 16:30:20,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:20,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:20,421 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:20,421 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 154 flow. Second operand 4 states and 484 transitions. [2023-11-17 16:30:20,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 80 transitions, 464 flow [2023-11-17 16:30:20,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 80 transitions, 464 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 16:30:20,423 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 175 flow [2023-11-17 16:30:20,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-11-17 16:30:20,424 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-11-17 16:30:20,424 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 175 flow [2023-11-17 16:30:20,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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 16:30:20,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:20,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:20,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:30:20,425 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:20,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:20,425 INFO L85 PathProgramCache]: Analyzing trace with hash -898186094, now seen corresponding path program 3 times [2023-11-17 16:30:20,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:20,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925148599] [2023-11-17 16:30:20,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:20,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:20,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:20,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925148599] [2023-11-17 16:30:20,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925148599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:30:20,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:30:20,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:30:20,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317514450] [2023-11-17 16:30:20,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:20,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:30:20,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:20,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:30:20,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:30:20,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 239 [2023-11-17 16:30:20,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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 16:30:20,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:20,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 239 [2023-11-17 16:30:20,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:20,653 INFO L124 PetriNetUnfolderBase]: 1405/1871 cut-off events. [2023-11-17 16:30:20,653 INFO L125 PetriNetUnfolderBase]: For 2382/2382 co-relation queries the response was YES. [2023-11-17 16:30:20,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6376 conditions, 1871 events. 1405/1871 cut-off events. For 2382/2382 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6898 event pairs, 293 based on Foata normal form. 6/1877 useless extension candidates. Maximal degree in co-relation 1566. Up to 1749 conditions per place. [2023-11-17 16:30:20,662 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 39 selfloop transitions, 3 changer transitions 16/62 dead transitions. [2023-11-17 16:30:20,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 357 flow [2023-11-17 16:30:20,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:30:20,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:30:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2023-11-17 16:30:20,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49267782426778245 [2023-11-17 16:30:20,663 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2023-11-17 16:30:20,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2023-11-17 16:30:20,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:20,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2023-11-17 16:30:20,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 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 16:30:20,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:20,666 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:20,666 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 175 flow. Second operand 4 states and 471 transitions. [2023-11-17 16:30:20,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 357 flow [2023-11-17 16:30:20,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 351 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 16:30:20,668 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 160 flow [2023-11-17 16:30:20,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-11-17 16:30:20,669 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-11-17 16:30:20,669 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 160 flow [2023-11-17 16:30:20,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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 16:30:20,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:20,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:20,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 16:30:20,669 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:20,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:20,670 INFO L85 PathProgramCache]: Analyzing trace with hash 479259199, now seen corresponding path program 2 times [2023-11-17 16:30:20,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:20,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885186884] [2023-11-17 16:30:20,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:20,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:20,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:20,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885186884] [2023-11-17 16:30:20,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885186884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:30:20,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:30:20,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:30:20,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469754683] [2023-11-17 16:30:20,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:20,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:30:20,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:20,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:30:20,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:30:20,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 239 [2023-11-17 16:30:20,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 160 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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 16:30:20,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:20,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 239 [2023-11-17 16:30:20,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:20,870 INFO L124 PetriNetUnfolderBase]: 1383/1849 cut-off events. [2023-11-17 16:30:20,871 INFO L125 PetriNetUnfolderBase]: For 2886/2892 co-relation queries the response was YES. [2023-11-17 16:30:20,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6217 conditions, 1849 events. 1383/1849 cut-off events. For 2886/2892 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6569 event pairs, 291 based on Foata normal form. 33/1882 useless extension candidates. Maximal degree in co-relation 3073. Up to 1549 conditions per place. [2023-11-17 16:30:20,879 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 47 selfloop transitions, 4 changer transitions 16/71 dead transitions. [2023-11-17 16:30:20,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 71 transitions, 462 flow [2023-11-17 16:30:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:30:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:30:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2023-11-17 16:30:20,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905857740585774 [2023-11-17 16:30:20,881 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 469 transitions. [2023-11-17 16:30:20,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 469 transitions. [2023-11-17 16:30:20,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:20,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 469 transitions. [2023-11-17 16:30:20,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 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 16:30:20,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:20,884 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:20,884 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 160 flow. Second operand 4 states and 469 transitions. [2023-11-17 16:30:20,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 71 transitions, 462 flow [2023-11-17 16:30:20,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 71 transitions, 452 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-17 16:30:20,886 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 182 flow [2023-11-17 16:30:20,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-11-17 16:30:20,887 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2023-11-17 16:30:20,887 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 182 flow [2023-11-17 16:30:20,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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 16:30:20,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:20,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:20,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 16:30:20,888 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:20,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:20,888 INFO L85 PathProgramCache]: Analyzing trace with hash 403339537, now seen corresponding path program 3 times [2023-11-17 16:30:20,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:20,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890263889] [2023-11-17 16:30:20,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:20,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:20,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:20,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890263889] [2023-11-17 16:30:20,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890263889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:30:20,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:30:20,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:30:20,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289617162] [2023-11-17 16:30:20,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:20,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:30:20,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:20,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:30:20,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:30:20,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 239 [2023-11-17 16:30:20,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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 16:30:20,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:20,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 239 [2023-11-17 16:30:20,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:21,141 INFO L124 PetriNetUnfolderBase]: 1287/1711 cut-off events. [2023-11-17 16:30:21,141 INFO L125 PetriNetUnfolderBase]: For 3472/3478 co-relation queries the response was YES. [2023-11-17 16:30:21,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6345 conditions, 1711 events. 1287/1711 cut-off events. For 3472/3478 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5876 event pairs, 326 based on Foata normal form. 33/1744 useless extension candidates. Maximal degree in co-relation 6094. Up to 1523 conditions per place. [2023-11-17 16:30:21,150 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 45 selfloop transitions, 6 changer transitions 15/70 dead transitions. [2023-11-17 16:30:21,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 70 transitions, 450 flow [2023-11-17 16:30:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:30:21,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:30:21,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 472 transitions. [2023-11-17 16:30:21,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49372384937238495 [2023-11-17 16:30:21,151 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 472 transitions. [2023-11-17 16:30:21,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 472 transitions. [2023-11-17 16:30:21,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:21,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 472 transitions. [2023-11-17 16:30:21,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.0) internal successors, (472), 4 states have internal predecessors, (472), 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 16:30:21,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:21,154 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:21,154 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 182 flow. Second operand 4 states and 472 transitions. [2023-11-17 16:30:21,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 70 transitions, 450 flow [2023-11-17 16:30:21,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 70 transitions, 439 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 16:30:21,157 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 240 flow [2023-11-17 16:30:21,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=240, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-11-17 16:30:21,157 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2023-11-17 16:30:21,158 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 240 flow [2023-11-17 16:30:21,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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 16:30:21,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:21,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:21,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 16:30:21,158 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:21,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:21,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1309161335, now seen corresponding path program 4 times [2023-11-17 16:30:21,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:21,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701695113] [2023-11-17 16:30:21,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:21,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:21,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:21,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701695113] [2023-11-17 16:30:21,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701695113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:30:21,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:30:21,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:30:21,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854651036] [2023-11-17 16:30:21,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:21,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:30:21,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:21,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:30:21,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:30:21,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 239 [2023-11-17 16:30:21,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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 16:30:21,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:21,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 239 [2023-11-17 16:30:21,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:21,344 INFO L124 PetriNetUnfolderBase]: 1164/1545 cut-off events. [2023-11-17 16:30:21,344 INFO L125 PetriNetUnfolderBase]: For 3526/3526 co-relation queries the response was YES. [2023-11-17 16:30:21,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6068 conditions, 1545 events. 1164/1545 cut-off events. For 3526/3526 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5009 event pairs, 328 based on Foata normal form. 64/1609 useless extension candidates. Maximal degree in co-relation 4058. Up to 1297 conditions per place. [2023-11-17 16:30:21,351 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 53 selfloop transitions, 4 changer transitions 1/62 dead transitions. [2023-11-17 16:30:21,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 439 flow [2023-11-17 16:30:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:30:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:30:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 465 transitions. [2023-11-17 16:30:21,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48640167364016734 [2023-11-17 16:30:21,353 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 465 transitions. [2023-11-17 16:30:21,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 465 transitions. [2023-11-17 16:30:21,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:21,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 465 transitions. [2023-11-17 16:30:21,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 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 16:30:21,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:21,355 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:21,355 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 240 flow. Second operand 4 states and 465 transitions. [2023-11-17 16:30:21,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 439 flow [2023-11-17 16:30:21,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 62 transitions, 427 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-17 16:30:21,358 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 252 flow [2023-11-17 16:30:21,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-11-17 16:30:21,359 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2023-11-17 16:30:21,359 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 252 flow [2023-11-17 16:30:21,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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 16:30:21,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:21,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:21,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 16:30:21,359 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:21,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:21,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1679939406, now seen corresponding path program 1 times [2023-11-17 16:30:21,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:21,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941188884] [2023-11-17 16:30:21,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:21,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:21,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:21,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941188884] [2023-11-17 16:30:21,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941188884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:21,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853861042] [2023-11-17 16:30:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:21,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:21,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:21,444 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 16:30:21,468 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 16:30:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:21,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 16:30:21,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:30:21,643 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 16:30:21,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:30:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:30:21,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853861042] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:21,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:30:21,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2023-11-17 16:30:21,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884521511] [2023-11-17 16:30:21,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:21,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:30:21,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:21,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:30:21,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:30:21,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 239 [2023-11-17 16:30:21,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 252 flow. Second operand has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 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 16:30:21,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:21,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 239 [2023-11-17 16:30:21,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:21,940 INFO L124 PetriNetUnfolderBase]: 1546/2128 cut-off events. [2023-11-17 16:30:21,940 INFO L125 PetriNetUnfolderBase]: For 5304/5304 co-relation queries the response was YES. [2023-11-17 16:30:21,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8506 conditions, 2128 events. 1546/2128 cut-off events. For 5304/5304 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8192 event pairs, 230 based on Foata normal form. 60/2186 useless extension candidates. Maximal degree in co-relation 2824. Up to 975 conditions per place. [2023-11-17 16:30:21,954 INFO L140 encePairwiseOnDemand]: 234/239 looper letters, 81 selfloop transitions, 9 changer transitions 1/95 dead transitions. [2023-11-17 16:30:21,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 95 transitions, 703 flow [2023-11-17 16:30:21,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:30:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:30:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 484 transitions. [2023-11-17 16:30:21,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062761506276151 [2023-11-17 16:30:21,956 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 484 transitions. [2023-11-17 16:30:21,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 484 transitions. [2023-11-17 16:30:21,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:21,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 484 transitions. [2023-11-17 16:30:21,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:21,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:21,960 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:21,960 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 252 flow. Second operand 4 states and 484 transitions. [2023-11-17 16:30:21,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 95 transitions, 703 flow [2023-11-17 16:30:21,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 95 transitions, 696 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 16:30:21,963 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 340 flow [2023-11-17 16:30:21,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=340, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-11-17 16:30:21,964 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2023-11-17 16:30:21,964 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 340 flow [2023-11-17 16:30:21,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 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 16:30:21,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:21,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:21,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 16:30:22,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:22,172 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:22,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:22,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1363723642, now seen corresponding path program 2 times [2023-11-17 16:30:22,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:22,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498167646] [2023-11-17 16:30:22,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:22,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:30:22,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:22,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498167646] [2023-11-17 16:30:22,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498167646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:30:22,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:30:22,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:30:22,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829233225] [2023-11-17 16:30:22,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:22,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:30:22,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:22,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:30:22,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:30:22,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 239 [2023-11-17 16:30:22,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 340 flow. Second operand has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 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 16:30:22,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:22,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 239 [2023-11-17 16:30:22,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:22,386 INFO L124 PetriNetUnfolderBase]: 1378/1887 cut-off events. [2023-11-17 16:30:22,386 INFO L125 PetriNetUnfolderBase]: For 6530/6534 co-relation queries the response was YES. [2023-11-17 16:30:22,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8270 conditions, 1887 events. 1378/1887 cut-off events. For 6530/6534 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6867 event pairs, 120 based on Foata normal form. 17/1902 useless extension candidates. Maximal degree in co-relation 4916. Up to 1287 conditions per place. [2023-11-17 16:30:22,396 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 69 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2023-11-17 16:30:22,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 80 transitions, 658 flow [2023-11-17 16:30:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:30:22,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:30:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 473 transitions. [2023-11-17 16:30:22,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49476987447698745 [2023-11-17 16:30:22,397 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 473 transitions. [2023-11-17 16:30:22,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 473 transitions. [2023-11-17 16:30:22,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:22,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 473 transitions. [2023-11-17 16:30:22,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.25) internal successors, (473), 4 states have internal predecessors, (473), 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 16:30:22,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:22,400 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:22,400 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 340 flow. Second operand 4 states and 473 transitions. [2023-11-17 16:30:22,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 80 transitions, 658 flow [2023-11-17 16:30:22,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 658 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 16:30:22,405 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 373 flow [2023-11-17 16:30:22,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=373, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-11-17 16:30:22,407 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2023-11-17 16:30:22,407 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 373 flow [2023-11-17 16:30:22,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 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 16:30:22,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:22,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:22,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 16:30:22,408 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:22,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:22,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2112705655, now seen corresponding path program 1 times [2023-11-17 16:30:22,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:22,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833167112] [2023-11-17 16:30:22,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:22,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:30:22,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:22,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833167112] [2023-11-17 16:30:22,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833167112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:22,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641393360] [2023-11-17 16:30:22,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:22,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:22,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:22,487 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:30:22,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 16:30:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:22,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 16:30:22,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:30:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:30:22,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:30:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:30:22,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641393360] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:22,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:30:22,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2023-11-17 16:30:22,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008419161] [2023-11-17 16:30:22,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:30:22,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:30:22,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:22,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:30:22,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:30:22,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 239 [2023-11-17 16:30:22,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 373 flow. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 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 16:30:22,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:22,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 239 [2023-11-17 16:30:22,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:22,873 INFO L124 PetriNetUnfolderBase]: 1584/2178 cut-off events. [2023-11-17 16:30:22,873 INFO L125 PetriNetUnfolderBase]: For 9609/9609 co-relation queries the response was YES. [2023-11-17 16:30:22,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10000 conditions, 2178 events. 1584/2178 cut-off events. For 9609/9609 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8361 event pairs, 350 based on Foata normal form. 60/2235 useless extension candidates. Maximal degree in co-relation 4443. Up to 1149 conditions per place. [2023-11-17 16:30:22,886 INFO L140 encePairwiseOnDemand]: 234/239 looper letters, 77 selfloop transitions, 12 changer transitions 1/94 dead transitions. [2023-11-17 16:30:22,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 94 transitions, 804 flow [2023-11-17 16:30:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:30:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:30:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 482 transitions. [2023-11-17 16:30:22,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50418410041841 [2023-11-17 16:30:22,887 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 482 transitions. [2023-11-17 16:30:22,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 482 transitions. [2023-11-17 16:30:22,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:22,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 482 transitions. [2023-11-17 16:30:22,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 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 16:30:22,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:22,889 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:22,890 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 373 flow. Second operand 4 states and 482 transitions. [2023-11-17 16:30:22,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 94 transitions, 804 flow [2023-11-17 16:30:22,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 94 transitions, 777 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-17 16:30:22,894 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 416 flow [2023-11-17 16:30:22,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=416, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2023-11-17 16:30:22,895 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2023-11-17 16:30:22,895 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 416 flow [2023-11-17 16:30:22,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 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 16:30:22,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:22,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:22,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 16:30:23,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-17 16:30:23,100 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:23,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:23,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1324109724, now seen corresponding path program 1 times [2023-11-17 16:30:23,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:23,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062961128] [2023-11-17 16:30:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:23,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:23,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:23,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062961128] [2023-11-17 16:30:23,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062961128] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:23,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032004743] [2023-11-17 16:30:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:23,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:23,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:23,193 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:30:23,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 16:30:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:23,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:30:23,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:30:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:23,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:30:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:23,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032004743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:30:23,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:30:23,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 4 [2023-11-17 16:30:23,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416582058] [2023-11-17 16:30:23,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:30:23,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:30:23,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:23,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:30:23,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:30:23,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 239 [2023-11-17 16:30:23,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 416 flow. Second operand has 6 states, 6 states have (on average 121.16666666666667) internal successors, (727), 6 states have internal predecessors, (727), 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 16:30:23,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:23,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 239 [2023-11-17 16:30:23,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:23,739 INFO L124 PetriNetUnfolderBase]: 3654/5175 cut-off events. [2023-11-17 16:30:23,740 INFO L125 PetriNetUnfolderBase]: For 28202/28216 co-relation queries the response was YES. [2023-11-17 16:30:23,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24317 conditions, 5175 events. 3654/5175 cut-off events. For 28202/28216 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24555 event pairs, 950 based on Foata normal form. 487/5662 useless extension candidates. Maximal degree in co-relation 7222. Up to 2453 conditions per place. [2023-11-17 16:30:23,770 INFO L140 encePairwiseOnDemand]: 233/239 looper letters, 84 selfloop transitions, 33 changer transitions 3/124 dead transitions. [2023-11-17 16:30:23,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 124 transitions, 1199 flow [2023-11-17 16:30:23,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:30:23,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:30:23,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 527 transitions. [2023-11-17 16:30:23,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551255230125523 [2023-11-17 16:30:23,771 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 527 transitions. [2023-11-17 16:30:23,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 527 transitions. [2023-11-17 16:30:23,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:23,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 527 transitions. [2023-11-17 16:30:23,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 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 16:30:23,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:23,774 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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 16:30:23,774 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 416 flow. Second operand 4 states and 527 transitions. [2023-11-17 16:30:23,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 124 transitions, 1199 flow [2023-11-17 16:30:23,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 124 transitions, 1166 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-11-17 16:30:23,785 INFO L231 Difference]: Finished difference. Result has 64 places, 82 transitions, 909 flow [2023-11-17 16:30:23,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=909, PETRI_PLACES=64, PETRI_TRANSITIONS=82} [2023-11-17 16:30:23,785 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2023-11-17 16:30:23,786 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 82 transitions, 909 flow [2023-11-17 16:30:23,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 121.16666666666667) internal successors, (727), 6 states have internal predecessors, (727), 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 16:30:23,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:23,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:23,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 16:30:23,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:23,991 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:23,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:23,991 INFO L85 PathProgramCache]: Analyzing trace with hash -16217264, now seen corresponding path program 2 times [2023-11-17 16:30:23,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:23,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830681165] [2023-11-17 16:30:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:23,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:24,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:24,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830681165] [2023-11-17 16:30:24,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830681165] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:24,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862400683] [2023-11-17 16:30:24,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:30:24,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:24,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:24,093 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:30:24,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 16:30:24,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:30:24,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:30:24,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 16:30:24,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:30:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:24,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:30:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:30:24,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862400683] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:30:24,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:30:24,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-11-17 16:30:24,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134209573] [2023-11-17 16:30:24,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:30:24,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:30:24,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:24,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:30:24,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:30:24,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 239 [2023-11-17 16:30:24,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 82 transitions, 909 flow. Second operand has 5 states, 5 states have (on average 119.0) internal successors, (595), 5 states have internal predecessors, (595), 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 16:30:24,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:24,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 239 [2023-11-17 16:30:24,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:25,087 INFO L124 PetriNetUnfolderBase]: 7208/10211 cut-off events. [2023-11-17 16:30:25,087 INFO L125 PetriNetUnfolderBase]: For 77619/77637 co-relation queries the response was YES. [2023-11-17 16:30:25,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54110 conditions, 10211 events. 7208/10211 cut-off events. For 77619/77637 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 54599 event pairs, 1518 based on Foata normal form. 508/10719 useless extension candidates. Maximal degree in co-relation 12975. Up to 4429 conditions per place. [2023-11-17 16:30:25,160 INFO L140 encePairwiseOnDemand]: 233/239 looper letters, 106 selfloop transitions, 83 changer transitions 3/196 dead transitions. [2023-11-17 16:30:25,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 196 transitions, 2288 flow [2023-11-17 16:30:25,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:30:25,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:30:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 664 transitions. [2023-11-17 16:30:25,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5556485355648536 [2023-11-17 16:30:25,162 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 664 transitions. [2023-11-17 16:30:25,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 664 transitions. [2023-11-17 16:30:25,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:25,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 664 transitions. [2023-11-17 16:30:25,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 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 16:30:25,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 239.0) internal successors, (1434), 6 states have internal predecessors, (1434), 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 16:30:25,165 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 239.0) internal successors, (1434), 6 states have internal predecessors, (1434), 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 16:30:25,165 INFO L175 Difference]: Start difference. First operand has 64 places, 82 transitions, 909 flow. Second operand 5 states and 664 transitions. [2023-11-17 16:30:25,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 196 transitions, 2288 flow [2023-11-17 16:30:25,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 196 transitions, 2244 flow, removed 22 selfloop flow, removed 0 redundant places. [2023-11-17 16:30:25,183 INFO L231 Difference]: Finished difference. Result has 70 places, 132 transitions, 1832 flow [2023-11-17 16:30:25,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1832, PETRI_PLACES=70, PETRI_TRANSITIONS=132} [2023-11-17 16:30:25,183 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-11-17 16:30:25,183 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 132 transitions, 1832 flow [2023-11-17 16:30:25,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.0) internal successors, (595), 5 states have internal predecessors, (595), 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 16:30:25,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:25,184 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:25,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 16:30:25,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:25,389 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:25,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:25,390 INFO L85 PathProgramCache]: Analyzing trace with hash -52172413, now seen corresponding path program 3 times [2023-11-17 16:30:25,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:25,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244932391] [2023-11-17 16:30:25,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:25,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:30:25,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:25,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244932391] [2023-11-17 16:30:25,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244932391] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:25,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969731807] [2023-11-17 16:30:25,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:30:25,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:25,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:25,491 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:30:25,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 16:30:25,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:30:25,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:30:25,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:30:25,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:30:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:30:25,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:30:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:30:25,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969731807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:30:25,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:30:25,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-17 16:30:25,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539109038] [2023-11-17 16:30:25,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:30:25,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:30:25,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:25,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:30:25,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:30:25,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 239 [2023-11-17 16:30:25,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 132 transitions, 1832 flow. Second operand has 14 states, 14 states have (on average 104.42857142857143) internal successors, (1462), 14 states have internal predecessors, (1462), 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 16:30:25,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:25,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 239 [2023-11-17 16:30:25,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:29,229 INFO L124 PetriNetUnfolderBase]: 21883/30921 cut-off events. [2023-11-17 16:30:29,230 INFO L125 PetriNetUnfolderBase]: For 270742/270748 co-relation queries the response was YES. [2023-11-17 16:30:29,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184611 conditions, 30921 events. 21883/30921 cut-off events. For 270742/270748 co-relation queries the response was YES. Maximal size of possible extension queue 1375. Compared 189176 event pairs, 1583 based on Foata normal form. 4419/35339 useless extension candidates. Maximal degree in co-relation 52556. Up to 12301 conditions per place. [2023-11-17 16:30:29,446 INFO L140 encePairwiseOnDemand]: 232/239 looper letters, 724 selfloop transitions, 408 changer transitions 0/1136 dead transitions. [2023-11-17 16:30:29,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 1136 transitions, 16030 flow [2023-11-17 16:30:29,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 16:30:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 16:30:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4143 transitions. [2023-11-17 16:30:29,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685061630668325 [2023-11-17 16:30:29,454 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4143 transitions. [2023-11-17 16:30:29,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4143 transitions. [2023-11-17 16:30:29,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:29,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4143 transitions. [2023-11-17 16:30:29,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 111.97297297297297) internal successors, (4143), 37 states have internal predecessors, (4143), 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 16:30:29,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 239.0) internal successors, (9082), 38 states have internal predecessors, (9082), 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 16:30:29,471 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 239.0) internal successors, (9082), 38 states have internal predecessors, (9082), 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 16:30:29,471 INFO L175 Difference]: Start difference. First operand has 70 places, 132 transitions, 1832 flow. Second operand 37 states and 4143 transitions. [2023-11-17 16:30:29,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 1136 transitions, 16030 flow [2023-11-17 16:30:29,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 1136 transitions, 14688 flow, removed 671 selfloop flow, removed 0 redundant places. [2023-11-17 16:30:29,687 INFO L231 Difference]: Finished difference. Result has 135 places, 514 transitions, 8901 flow [2023-11-17 16:30:29,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8901, PETRI_PLACES=135, PETRI_TRANSITIONS=514} [2023-11-17 16:30:29,688 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 97 predicate places. [2023-11-17 16:30:29,688 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 514 transitions, 8901 flow [2023-11-17 16:30:29,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 104.42857142857143) internal successors, (1462), 14 states have internal predecessors, (1462), 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 16:30:29,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:29,689 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:29,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 16:30:29,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 16:30:29,894 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:29,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:29,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1060469998, now seen corresponding path program 4 times [2023-11-17 16:30:29,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:29,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721144528] [2023-11-17 16:30:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:29,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:30:29,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:29,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721144528] [2023-11-17 16:30:29,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721144528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:29,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595001702] [2023-11-17 16:30:29,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:30:29,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:29,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:29,986 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:30:30,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 16:30:30,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:30:30,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:30:30,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:30:30,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:30:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:30:30,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:30:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:30:30,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595001702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:30:30,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:30:30,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-17 16:30:30,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066532914] [2023-11-17 16:30:30,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:30:30,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:30:30,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:30,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:30:30,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:30:30,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 239 [2023-11-17 16:30:30,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 514 transitions, 8901 flow. Second operand has 13 states, 13 states have (on average 109.53846153846153) internal successors, (1424), 13 states have internal predecessors, (1424), 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 16:30:30,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:30,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 239 [2023-11-17 16:30:30,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:38,486 INFO L124 PetriNetUnfolderBase]: 33263/46952 cut-off events. [2023-11-17 16:30:38,486 INFO L125 PetriNetUnfolderBase]: For 1665247/1665247 co-relation queries the response was YES. [2023-11-17 16:30:38,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411077 conditions, 46952 events. 33263/46952 cut-off events. For 1665247/1665247 co-relation queries the response was YES. Maximal size of possible extension queue 2081. Compared 305022 event pairs, 4656 based on Foata normal form. 1886/48838 useless extension candidates. Maximal degree in co-relation 331521. Up to 15835 conditions per place. [2023-11-17 16:30:39,091 INFO L140 encePairwiseOnDemand]: 234/239 looper letters, 1055 selfloop transitions, 218 changer transitions 142/1419 dead transitions. [2023-11-17 16:30:39,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 1419 transitions, 27377 flow [2023-11-17 16:30:39,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:30:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:30:39,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1877 transitions. [2023-11-17 16:30:39,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.490847280334728 [2023-11-17 16:30:39,097 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1877 transitions. [2023-11-17 16:30:39,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1877 transitions. [2023-11-17 16:30:39,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:39,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1877 transitions. [2023-11-17 16:30:39,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 117.3125) internal successors, (1877), 16 states have internal predecessors, (1877), 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 16:30:39,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 239.0) internal successors, (4063), 17 states have internal predecessors, (4063), 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 16:30:39,115 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 239.0) internal successors, (4063), 17 states have internal predecessors, (4063), 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 16:30:39,115 INFO L175 Difference]: Start difference. First operand has 135 places, 514 transitions, 8901 flow. Second operand 16 states and 1877 transitions. [2023-11-17 16:30:39,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 1419 transitions, 27377 flow [2023-11-17 16:30:44,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 1419 transitions, 24585 flow, removed 1248 selfloop flow, removed 2 redundant places. [2023-11-17 16:30:44,926 INFO L231 Difference]: Finished difference. Result has 156 places, 683 transitions, 11233 flow [2023-11-17 16:30:44,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=7655, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11233, PETRI_PLACES=156, PETRI_TRANSITIONS=683} [2023-11-17 16:30:44,926 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 118 predicate places. [2023-11-17 16:30:44,926 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 683 transitions, 11233 flow [2023-11-17 16:30:44,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 109.53846153846153) internal successors, (1424), 13 states have internal predecessors, (1424), 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 16:30:44,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:30:44,927 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:30:44,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 16:30:45,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 16:30:45,132 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:30:45,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:30:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash -355228556, now seen corresponding path program 5 times [2023-11-17 16:30:45,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:30:45,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994803277] [2023-11-17 16:30:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:30:45,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:30:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:30:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:30:45,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:30:45,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994803277] [2023-11-17 16:30:45,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994803277] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:30:45,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017157543] [2023-11-17 16:30:45,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:30:45,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:30:45,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:30:45,209 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:30:45,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 16:30:45,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:30:45,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:30:45,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:30:45,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:30:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:30:45,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:30:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:30:45,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017157543] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:30:45,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:30:45,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-17 16:30:45,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165315610] [2023-11-17 16:30:45,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:30:45,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:30:45,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:30:45,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:30:45,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:30:45,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 239 [2023-11-17 16:30:45,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 683 transitions, 11233 flow. Second operand has 14 states, 14 states have (on average 104.14285714285714) internal successors, (1458), 14 states have internal predecessors, (1458), 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 16:30:45,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:30:45,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 239 [2023-11-17 16:30:45,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:59,884 INFO L124 PetriNetUnfolderBase]: 50836/70436 cut-off events. [2023-11-17 16:30:59,885 INFO L125 PetriNetUnfolderBase]: For 2665004/2665004 co-relation queries the response was YES. [2023-11-17 16:31:00,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646704 conditions, 70436 events. 50836/70436 cut-off events. For 2665004/2665004 co-relation queries the response was YES. Maximal size of possible extension queue 2882. Compared 460480 event pairs, 3908 based on Foata normal form. 3736/74172 useless extension candidates. Maximal degree in co-relation 631289. Up to 22185 conditions per place. [2023-11-17 16:31:01,198 INFO L140 encePairwiseOnDemand]: 232/239 looper letters, 1573 selfloop transitions, 602 changer transitions 107/2286 dead transitions. [2023-11-17 16:31:01,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 2286 transitions, 42117 flow [2023-11-17 16:31:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 16:31:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 16:31:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2799 transitions. [2023-11-17 16:31:01,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684518828451883 [2023-11-17 16:31:01,202 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2799 transitions. [2023-11-17 16:31:01,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2799 transitions. [2023-11-17 16:31:01,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:31:01,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2799 transitions. [2023-11-17 16:31:01,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 111.96) internal successors, (2799), 25 states have internal predecessors, (2799), 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 16:31:01,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 239.0) internal successors, (6214), 26 states have internal predecessors, (6214), 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 16:31:01,212 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 239.0) internal successors, (6214), 26 states have internal predecessors, (6214), 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 16:31:01,213 INFO L175 Difference]: Start difference. First operand has 156 places, 683 transitions, 11233 flow. Second operand 25 states and 2799 transitions. [2023-11-17 16:31:01,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 2286 transitions, 42117 flow [2023-11-17 16:31:16,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 2286 transitions, 40413 flow, removed 827 selfloop flow, removed 4 redundant places. [2023-11-17 16:31:16,490 INFO L231 Difference]: Finished difference. Result has 185 places, 1039 transitions, 18901 flow [2023-11-17 16:31:16,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=10203, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=18901, PETRI_PLACES=185, PETRI_TRANSITIONS=1039} [2023-11-17 16:31:16,491 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 147 predicate places. [2023-11-17 16:31:16,491 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 1039 transitions, 18901 flow [2023-11-17 16:31:16,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 104.14285714285714) internal successors, (1458), 14 states have internal predecessors, (1458), 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 16:31:16,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:31:16,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:31:16,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 16:31:16,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:16,705 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:31:16,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:31:16,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1681493301, now seen corresponding path program 6 times [2023-11-17 16:31:16,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:31:16,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24428901] [2023-11-17 16:31:16,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:31:16,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:31:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:31:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:31:16,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:31:16,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24428901] [2023-11-17 16:31:16,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24428901] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:31:16,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541912888] [2023-11-17 16:31:16,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:31:16,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:31:16,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:31:16,789 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:31:16,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 16:31:16,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:31:16,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:31:16,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:31:16,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:31:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:31:17,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:31:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:31:17,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541912888] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:31:17,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:31:17,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-17 16:31:17,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920884131] [2023-11-17 16:31:17,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:31:17,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:31:17,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:31:17,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:31:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:31:17,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 239 [2023-11-17 16:31:17,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 1039 transitions, 18901 flow. Second operand has 13 states, 13 states have (on average 104.53846153846153) internal successors, (1359), 13 states have internal predecessors, (1359), 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 16:31:17,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:31:17,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 239 [2023-11-17 16:31:17,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:31:41,577 INFO L124 PetriNetUnfolderBase]: 70307/96071 cut-off events. [2023-11-17 16:31:41,577 INFO L125 PetriNetUnfolderBase]: For 4377271/4377274 co-relation queries the response was YES. [2023-11-17 16:31:42,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984833 conditions, 96071 events. 70307/96071 cut-off events. For 4377271/4377274 co-relation queries the response was YES. Maximal size of possible extension queue 3930. Compared 621627 event pairs, 5048 based on Foata normal form. 1756/97826 useless extension candidates. Maximal degree in co-relation 847136. Up to 29679 conditions per place. [2023-11-17 16:31:43,436 INFO L140 encePairwiseOnDemand]: 232/239 looper letters, 2032 selfloop transitions, 764 changer transitions 145/2945 dead transitions. [2023-11-17 16:31:43,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 2945 transitions, 62557 flow [2023-11-17 16:31:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 16:31:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 16:31:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3436 transitions. [2023-11-17 16:31:43,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46376029153731946 [2023-11-17 16:31:43,441 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3436 transitions. [2023-11-17 16:31:43,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3436 transitions. [2023-11-17 16:31:43,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:31:43,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3436 transitions. [2023-11-17 16:31:43,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 110.83870967741936) internal successors, (3436), 31 states have internal predecessors, (3436), 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 16:31:43,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 239.0) internal successors, (7648), 32 states have internal predecessors, (7648), 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 16:31:43,453 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 239.0) internal successors, (7648), 32 states have internal predecessors, (7648), 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 16:31:43,453 INFO L175 Difference]: Start difference. First operand has 185 places, 1039 transitions, 18901 flow. Second operand 31 states and 3436 transitions. [2023-11-17 16:31:43,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 2945 transitions, 62557 flow [2023-11-17 16:32:55,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 2945 transitions, 56393 flow, removed 3004 selfloop flow, removed 5 redundant places. [2023-11-17 16:32:55,696 INFO L231 Difference]: Finished difference. Result has 227 places, 1406 transitions, 28968 flow [2023-11-17 16:32:55,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=16823, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=28968, PETRI_PLACES=227, PETRI_TRANSITIONS=1406} [2023-11-17 16:32:55,697 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 189 predicate places. [2023-11-17 16:32:55,698 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 1406 transitions, 28968 flow [2023-11-17 16:32:55,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 104.53846153846153) internal successors, (1359), 13 states have internal predecessors, (1359), 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 16:32:55,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:55,698 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:55,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-17 16:32:55,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-17 16:32:55,903 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:32:55,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:55,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1545347135, now seen corresponding path program 7 times [2023-11-17 16:32:55,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:55,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985712500] [2023-11-17 16:32:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:55,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:56,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:56,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985712500] [2023-11-17 16:32:56,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985712500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:56,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364359454] [2023-11-17 16:32:56,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:32:56,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:56,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:56,022 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:32:56,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 16:32:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:56,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:32:56,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:32:56,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:32:56,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364359454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:56,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:56,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-17 16:32:56,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353842316] [2023-11-17 16:32:56,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:56,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:32:56,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:56,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:32:56,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:32:56,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 239 [2023-11-17 16:32:56,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 1406 transitions, 28968 flow. Second operand has 14 states, 14 states have (on average 104.57142857142857) internal successors, (1464), 14 states have internal predecessors, (1464), 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 16:32:56,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:56,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 239 [2023-11-17 16:32:56,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand