/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/test-easy1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:34:41,138 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:34:41,196 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 16:34:41,221 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:34:41,221 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:34:41,222 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:34:41,222 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:34:41,222 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:34:41,223 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:34:41,225 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:34:41,226 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:34:41,226 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:34:41,226 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:34:41,227 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:34:41,227 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:34:41,227 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:34:41,227 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:34:41,228 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:34:41,228 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:34:41,228 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:34:41,228 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:34:41,229 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:34:41,229 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:34:41,229 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:34:41,229 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:34:41,229 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:34:41,229 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:34:41,229 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:34:41,230 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:34:41,230 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:34:41,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:34:41,230 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:34:41,231 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:34:41,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:34:41,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:34:41,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:34:41,442 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:34:41,442 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:34:41,443 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c [2023-11-17 16:34:42,490 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:34:42,617 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:34:42,617 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c [2023-11-17 16:34:42,622 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a47af784/c10cecf09c1047f39ad243c4407edcac/FLAGbb7d17763 [2023-11-17 16:34:42,637 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a47af784/c10cecf09c1047f39ad243c4407edcac [2023-11-17 16:34:42,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:34:42,640 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:34:42,641 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:34:42,641 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:34:42,644 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:34:42,645 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:34:42" (1/1) ... [2023-11-17 16:34:42,646 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434d3585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:42, skipping insertion in model container [2023-11-17 16:34:42,646 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:34:42" (1/1) ... [2023-11-17 16:34:42,663 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:34:42,764 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/test-easy1.wvr.c[1902,1915] [2023-11-17 16:34:42,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:34:42,774 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:34:42,789 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/test-easy1.wvr.c[1902,1915] [2023-11-17 16:34:42,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:34:42,803 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:34:42,803 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:42 WrapperNode [2023-11-17 16:34:42,803 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:34:42,804 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:34:42,804 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:34:42,804 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:34:42,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:42" (1/1) ... [2023-11-17 16:34:42,813 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:42" (1/1) ... [2023-11-17 16:34:42,829 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2023-11-17 16:34:42,829 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:34:42,830 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:34:42,830 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:34:42,830 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:34:42,836 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:42" (1/1) ... [2023-11-17 16:34:42,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:42" (1/1) ... [2023-11-17 16:34:42,845 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:42" (1/1) ... [2023-11-17 16:34:42,845 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:42" (1/1) ... [2023-11-17 16:34:42,854 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:42" (1/1) ... [2023-11-17 16:34:42,857 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:42" (1/1) ... [2023-11-17 16:34:42,857 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:42" (1/1) ... [2023-11-17 16:34:42,858 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:42" (1/1) ... [2023-11-17 16:34:42,859 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:34:42,860 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:34:42,860 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:34:42,860 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:34:42,862 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:42" (1/1) ... [2023-11-17 16:34:42,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:34:42,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:42,884 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 16:34:42,892 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 16:34:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:34:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:34:42,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:34:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:34:42,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:34:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:34:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:34:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:34:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:34:42,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:34:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:34:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:34:42,910 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 16:34:43,008 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:34:43,010 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:34:43,180 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:34:43,190 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:34:43,190 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 16:34:43,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:34:43 BoogieIcfgContainer [2023-11-17 16:34:43,191 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:34:43,193 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:34:43,193 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:34:43,195 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:34:43,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:34:42" (1/3) ... [2023-11-17 16:34:43,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ddcbaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:34:43, skipping insertion in model container [2023-11-17 16:34:43,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:42" (2/3) ... [2023-11-17 16:34:43,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ddcbaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:34:43, skipping insertion in model container [2023-11-17 16:34:43,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:34:43" (3/3) ... [2023-11-17 16:34:43,197 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2023-11-17 16:34:43,210 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:34:43,210 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:34:43,210 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:34:43,285 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:34:43,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 182 flow [2023-11-17 16:34:43,372 INFO L124 PetriNetUnfolderBase]: 6/82 cut-off events. [2023-11-17 16:34:43,372 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:34:43,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-11-17 16:34:43,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 182 flow [2023-11-17 16:34:43,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2023-11-17 16:34:43,382 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:34:43,396 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 73 transitions, 158 flow [2023-11-17 16:34:43,401 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 73 transitions, 158 flow [2023-11-17 16:34:43,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 158 flow [2023-11-17 16:34:43,415 INFO L124 PetriNetUnfolderBase]: 6/73 cut-off events. [2023-11-17 16:34:43,415 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:34:43,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 6/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-11-17 16:34:43,416 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-11-17 16:34:45,073 INFO L134 LiptonReduction]: Checked pairs total: 458 [2023-11-17 16:34:45,073 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-11-17 16:34:45,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:34:45,099 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;@47630b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:34:45,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 16:34:45,104 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:34:45,106 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 16:34:45,106 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:34:45,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:45,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:45,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:45,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:45,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1490349039, now seen corresponding path program 1 times [2023-11-17 16:34:45,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:45,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773976477] [2023-11-17 16:34:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:45,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:45,276 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 16:34:45,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:45,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773976477] [2023-11-17 16:34:45,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773976477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:34:45,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:34:45,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:34:45,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143158737] [2023-11-17 16:34:45,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:34:45,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:34:45,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:45,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:34:45,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:34:45,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:45,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 16:34:45,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:45,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:45,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:45,344 INFO L124 PetriNetUnfolderBase]: 65/114 cut-off events. [2023-11-17 16:34:45,345 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-17 16:34:45,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 114 events. 65/114 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 322 event pairs, 9 based on Foata normal form. 1/75 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-11-17 16:34:45,346 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-11-17 16:34:45,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 117 flow [2023-11-17 16:34:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:34:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:34:45,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 207 transitions. [2023-11-17 16:34:45,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-11-17 16:34:45,356 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 207 transitions. [2023-11-17 16:34:45,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 207 transitions. [2023-11-17 16:34:45,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:45,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 207 transitions. [2023-11-17 16:34:45,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 16:34:45,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 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 16:34:45,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 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 16:34:45,364 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 207 transitions. [2023-11-17 16:34:45,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 117 flow [2023-11-17 16:34:45,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:34:45,367 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-11-17 16:34:45,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-11-17 16:34:45,371 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-17 16:34:45,371 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-11-17 16:34:45,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 16:34:45,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:45,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:45,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:34:45,372 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:45,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:45,372 INFO L85 PathProgramCache]: Analyzing trace with hash -912547753, now seen corresponding path program 1 times [2023-11-17 16:34:45,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:45,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336114517] [2023-11-17 16:34:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:45,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:45,436 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 16:34:45,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:45,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336114517] [2023-11-17 16:34:45,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336114517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:34:45,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:34:45,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:34:45,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729682071] [2023-11-17 16:34:45,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:34:45,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:34:45,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:45,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:34:45,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:34:45,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:45,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 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 16:34:45,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:45,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:45,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:45,531 INFO L124 PetriNetUnfolderBase]: 66/126 cut-off events. [2023-11-17 16:34:45,531 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-17 16:34:45,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 126 events. 66/126 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 379 event pairs, 9 based on Foata normal form. 8/132 useless extension candidates. Maximal degree in co-relation 79. Up to 52 conditions per place. [2023-11-17 16:34:45,532 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 29 selfloop transitions, 7 changer transitions 2/40 dead transitions. [2023-11-17 16:34:45,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 40 transitions, 193 flow [2023-11-17 16:34:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:34:45,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:34:45,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 341 transitions. [2023-11-17 16:34:45,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45466666666666666 [2023-11-17 16:34:45,535 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 341 transitions. [2023-11-17 16:34:45,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 341 transitions. [2023-11-17 16:34:45,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:45,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 341 transitions. [2023-11-17 16:34:45,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.2) internal successors, (341), 5 states have internal predecessors, (341), 0 states have call successors, (0), 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 16:34:45,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 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 16:34:45,539 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 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 16:34:45,539 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 5 states and 341 transitions. [2023-11-17 16:34:45,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 40 transitions, 193 flow [2023-11-17 16:34:45,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 40 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:34:45,540 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 106 flow [2023-11-17 16:34:45,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-11-17 16:34:45,541 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-11-17 16:34:45,541 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 106 flow [2023-11-17 16:34:45,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 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 16:34:45,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:45,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:45,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:34:45,542 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:45,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash 895196253, now seen corresponding path program 2 times [2023-11-17 16:34:45,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:45,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571437338] [2023-11-17 16:34:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:45,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:45,591 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 16:34:45,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:45,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571437338] [2023-11-17 16:34:45,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571437338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:34:45,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:34:45,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:34:45,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835934550] [2023-11-17 16:34:45,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:34:45,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:34:45,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:45,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:34:45,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:34:45,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:45,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 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 16:34:45,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:45,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:45,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:45,635 INFO L124 PetriNetUnfolderBase]: 59/116 cut-off events. [2023-11-17 16:34:45,635 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2023-11-17 16:34:45,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 116 events. 59/116 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 347 event pairs, 15 based on Foata normal form. 4/117 useless extension candidates. Maximal degree in co-relation 257. Up to 79 conditions per place. [2023-11-17 16:34:45,636 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 20 selfloop transitions, 6 changer transitions 6/34 dead transitions. [2023-11-17 16:34:45,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 211 flow [2023-11-17 16:34:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:34:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:34:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 272 transitions. [2023-11-17 16:34:45,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533333333333333 [2023-11-17 16:34:45,638 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 272 transitions. [2023-11-17 16:34:45,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 272 transitions. [2023-11-17 16:34:45,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:45,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 272 transitions. [2023-11-17 16:34:45,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 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 16:34:45,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 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 16:34:45,640 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 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 16:34:45,640 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 106 flow. Second operand 4 states and 272 transitions. [2023-11-17 16:34:45,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 211 flow [2023-11-17 16:34:45,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 16:34:45,642 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 123 flow [2023-11-17 16:34:45,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2023-11-17 16:34:45,643 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2023-11-17 16:34:45,643 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 123 flow [2023-11-17 16:34:45,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 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 16:34:45,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:45,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:45,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:34:45,644 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:45,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:45,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1778319311, now seen corresponding path program 1 times [2023-11-17 16:34:45,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:45,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759529340] [2023-11-17 16:34:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:45,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:45,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:45,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759529340] [2023-11-17 16:34:45,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759529340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:45,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146513529] [2023-11-17 16:34:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:45,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:45,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:45,684 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 16:34:45,697 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 16:34:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:45,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 16:34:45,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:45,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:45,878 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 16:34:45,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146513529] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:45,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:34:45,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2023-11-17 16:34:45,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928625181] [2023-11-17 16:34:45,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:34:45,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:34:45,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:45,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:34:45,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:34:45,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:45,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 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 16:34:45,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:45,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:45,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:45,926 INFO L124 PetriNetUnfolderBase]: 54/122 cut-off events. [2023-11-17 16:34:45,926 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2023-11-17 16:34:45,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 122 events. 54/122 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 374 event pairs, 5 based on Foata normal form. 6/126 useless extension candidates. Maximal degree in co-relation 262. Up to 52 conditions per place. [2023-11-17 16:34:45,928 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 31 selfloop transitions, 7 changer transitions 1/41 dead transitions. [2023-11-17 16:34:45,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 279 flow [2023-11-17 16:34:45,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:34:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:34:45,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 277 transitions. [2023-11-17 16:34:45,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46166666666666667 [2023-11-17 16:34:45,929 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 277 transitions. [2023-11-17 16:34:45,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 277 transitions. [2023-11-17 16:34:45,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:45,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 277 transitions. [2023-11-17 16:34:45,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 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 16:34:45,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 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 16:34:45,931 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 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 16:34:45,931 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 123 flow. Second operand 4 states and 277 transitions. [2023-11-17 16:34:45,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 279 flow [2023-11-17 16:34:45,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 41 transitions, 257 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-17 16:34:45,933 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 148 flow [2023-11-17 16:34:45,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2023-11-17 16:34:45,934 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2023-11-17 16:34:45,934 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 148 flow [2023-11-17 16:34:45,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 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 16:34:45,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:45,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:45,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:46,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:46,141 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:46,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:46,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1570643663, now seen corresponding path program 2 times [2023-11-17 16:34:46,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:46,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125954749] [2023-11-17 16:34:46,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:46,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:46,192 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 16:34:46,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:46,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125954749] [2023-11-17 16:34:46,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125954749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:34:46,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:34:46,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:34:46,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041784547] [2023-11-17 16:34:46,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:34:46,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:34:46,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:46,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:34:46,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:34:46,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:46,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 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 16:34:46,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:46,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:46,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:46,235 INFO L124 PetriNetUnfolderBase]: 50/111 cut-off events. [2023-11-17 16:34:46,235 INFO L125 PetriNetUnfolderBase]: For 265/268 co-relation queries the response was YES. [2023-11-17 16:34:46,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425 conditions, 111 events. 50/111 cut-off events. For 265/268 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 305 event pairs, 7 based on Foata normal form. 2/110 useless extension candidates. Maximal degree in co-relation 282. Up to 42 conditions per place. [2023-11-17 16:34:46,236 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 30 selfloop transitions, 6 changer transitions 2/40 dead transitions. [2023-11-17 16:34:46,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 289 flow [2023-11-17 16:34:46,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:34:46,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:34:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 337 transitions. [2023-11-17 16:34:46,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4493333333333333 [2023-11-17 16:34:46,238 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 337 transitions. [2023-11-17 16:34:46,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 337 transitions. [2023-11-17 16:34:46,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:46,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 337 transitions. [2023-11-17 16:34:46,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.4) internal successors, (337), 5 states have internal predecessors, (337), 0 states have call successors, (0), 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 16:34:46,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 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 16:34:46,240 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 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 16:34:46,240 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 148 flow. Second operand 5 states and 337 transitions. [2023-11-17 16:34:46,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 289 flow [2023-11-17 16:34:46,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 289 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 16:34:46,242 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 167 flow [2023-11-17 16:34:46,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-11-17 16:34:46,243 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 16 predicate places. [2023-11-17 16:34:46,243 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 167 flow [2023-11-17 16:34:46,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 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 16:34:46,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:46,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:46,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 16:34:46,243 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:46,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:46,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1433667927, now seen corresponding path program 1 times [2023-11-17 16:34:46,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:46,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651697437] [2023-11-17 16:34:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:46,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:46,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:46,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651697437] [2023-11-17 16:34:46,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651697437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:46,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866622922] [2023-11-17 16:34:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:46,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:46,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:46,349 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 16:34:46,353 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 16:34:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:46,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:34:46,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:46,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:46,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866622922] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:46,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:46,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 6 [2023-11-17 16:34:46,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430924317] [2023-11-17 16:34:46,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:46,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:34:46,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:46,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:34:46,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:34:46,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:46,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 167 flow. Second operand has 8 states, 8 states have (on average 64.75) internal successors, (518), 8 states have internal predecessors, (518), 0 states have call successors, (0), 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 16:34:46,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:46,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:46,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:46,559 INFO L124 PetriNetUnfolderBase]: 108/221 cut-off events. [2023-11-17 16:34:46,559 INFO L125 PetriNetUnfolderBase]: For 484/484 co-relation queries the response was YES. [2023-11-17 16:34:46,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931 conditions, 221 events. 108/221 cut-off events. For 484/484 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 796 event pairs, 8 based on Foata normal form. 8/228 useless extension candidates. Maximal degree in co-relation 356. Up to 91 conditions per place. [2023-11-17 16:34:46,562 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 42 selfloop transitions, 17 changer transitions 1/62 dead transitions. [2023-11-17 16:34:46,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 62 transitions, 498 flow [2023-11-17 16:34:46,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:34:46,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:34:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 413 transitions. [2023-11-17 16:34:46,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588888888888889 [2023-11-17 16:34:46,563 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 413 transitions. [2023-11-17 16:34:46,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 413 transitions. [2023-11-17 16:34:46,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:46,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 413 transitions. [2023-11-17 16:34:46,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.83333333333333) internal successors, (413), 6 states have internal predecessors, (413), 0 states have call successors, (0), 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 16:34:46,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 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 16:34:46,565 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 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 16:34:46,566 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 167 flow. Second operand 6 states and 413 transitions. [2023-11-17 16:34:46,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 62 transitions, 498 flow [2023-11-17 16:34:46,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 62 transitions, 477 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-17 16:34:46,568 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 328 flow [2023-11-17 16:34:46,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=328, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-11-17 16:34:46,570 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2023-11-17 16:34:46,571 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 328 flow [2023-11-17 16:34:46,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 64.75) internal successors, (518), 8 states have internal predecessors, (518), 0 states have call successors, (0), 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 16:34:46,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:46,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:46,582 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 16:34:46,775 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,SelfDestructingSolverStorable5 [2023-11-17 16:34:46,776 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:46,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:46,776 INFO L85 PathProgramCache]: Analyzing trace with hash 553875939, now seen corresponding path program 2 times [2023-11-17 16:34:46,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:46,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185415236] [2023-11-17 16:34:46,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:46,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:46,838 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 16:34:46,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:46,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185415236] [2023-11-17 16:34:46,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185415236] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:46,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018426819] [2023-11-17 16:34:46,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:34:46,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:46,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:46,840 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 16:34:46,842 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 16:34:46,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:34:46,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:46,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:34:46,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:46,932 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:34:46,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018426819] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:34:46,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:34:46,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 9 [2023-11-17 16:34:46,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306818355] [2023-11-17 16:34:46,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:34:46,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:34:46,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:46,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:34:46,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:34:46,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:46,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 63.166666666666664) internal successors, (379), 6 states have internal predecessors, (379), 0 states have call successors, (0), 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 16:34:46,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:46,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:46,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:47,023 INFO L124 PetriNetUnfolderBase]: 156/347 cut-off events. [2023-11-17 16:34:47,023 INFO L125 PetriNetUnfolderBase]: For 1426/1448 co-relation queries the response was YES. [2023-11-17 16:34:47,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1642 conditions, 347 events. 156/347 cut-off events. For 1426/1448 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1578 event pairs, 24 based on Foata normal form. 5/350 useless extension candidates. Maximal degree in co-relation 709. Up to 117 conditions per place. [2023-11-17 16:34:47,026 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 45 selfloop transitions, 12 changer transitions 10/69 dead transitions. [2023-11-17 16:34:47,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 69 transitions, 680 flow [2023-11-17 16:34:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:34:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:34:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 406 transitions. [2023-11-17 16:34:47,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45111111111111113 [2023-11-17 16:34:47,027 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 406 transitions. [2023-11-17 16:34:47,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 406 transitions. [2023-11-17 16:34:47,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:47,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 406 transitions. [2023-11-17 16:34:47,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.66666666666667) internal successors, (406), 6 states have internal predecessors, (406), 0 states have call successors, (0), 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 16:34:47,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 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 16:34:47,031 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 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 16:34:47,031 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 328 flow. Second operand 6 states and 406 transitions. [2023-11-17 16:34:47,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 69 transitions, 680 flow [2023-11-17 16:34:47,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 69 transitions, 616 flow, removed 23 selfloop flow, removed 2 redundant places. [2023-11-17 16:34:47,035 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 367 flow [2023-11-17 16:34:47,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=367, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2023-11-17 16:34:47,035 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-11-17 16:34:47,035 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 367 flow [2023-11-17 16:34:47,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.166666666666664) internal successors, (379), 6 states have internal predecessors, (379), 0 states have call successors, (0), 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 16:34:47,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:47,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:47,043 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 16:34:47,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:47,241 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:47,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:47,241 INFO L85 PathProgramCache]: Analyzing trace with hash 481599129, now seen corresponding path program 3 times [2023-11-17 16:34:47,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:47,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751303181] [2023-11-17 16:34:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:47,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:47,306 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 16:34:47,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:47,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751303181] [2023-11-17 16:34:47,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751303181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:47,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273614294] [2023-11-17 16:34:47,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:34:47,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:47,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:47,307 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 16:34:47,326 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 16:34:47,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:34:47,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:47,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:34:47,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:47,405 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 16:34:47,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:47,425 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 16:34:47,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273614294] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:47,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:47,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 2] total 8 [2023-11-17 16:34:47,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230603083] [2023-11-17 16:34:47,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:47,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:34:47,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:47,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:34:47,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:34:47,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:47,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 367 flow. Second operand has 10 states, 10 states have (on average 64.4) internal successors, (644), 10 states have internal predecessors, (644), 0 states have call successors, (0), 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 16:34:47,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:47,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:47,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:47,524 INFO L124 PetriNetUnfolderBase]: 187/404 cut-off events. [2023-11-17 16:34:47,525 INFO L125 PetriNetUnfolderBase]: For 2062/2062 co-relation queries the response was YES. [2023-11-17 16:34:47,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2027 conditions, 404 events. 187/404 cut-off events. For 2062/2062 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1927 event pairs, 30 based on Foata normal form. 6/409 useless extension candidates. Maximal degree in co-relation 1971. Up to 287 conditions per place. [2023-11-17 16:34:47,527 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 54 selfloop transitions, 16 changer transitions 3/75 dead transitions. [2023-11-17 16:34:47,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 781 flow [2023-11-17 16:34:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:34:47,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:34:47,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 477 transitions. [2023-11-17 16:34:47,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542857142857143 [2023-11-17 16:34:47,529 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 477 transitions. [2023-11-17 16:34:47,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 477 transitions. [2023-11-17 16:34:47,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:47,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 477 transitions. [2023-11-17 16:34:47,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.14285714285714) internal successors, (477), 7 states have internal predecessors, (477), 0 states have call successors, (0), 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 16:34:47,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 150.0) internal successors, (1200), 8 states have internal predecessors, (1200), 0 states have call successors, (0), 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 16:34:47,531 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 150.0) internal successors, (1200), 8 states have internal predecessors, (1200), 0 states have call successors, (0), 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 16:34:47,531 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 367 flow. Second operand 7 states and 477 transitions. [2023-11-17 16:34:47,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 781 flow [2023-11-17 16:34:47,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 760 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-17 16:34:47,535 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 570 flow [2023-11-17 16:34:47,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=570, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-11-17 16:34:47,536 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 37 predicate places. [2023-11-17 16:34:47,536 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 570 flow [2023-11-17 16:34:47,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 64.4) internal successors, (644), 10 states have internal predecessors, (644), 0 states have call successors, (0), 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 16:34:47,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:47,536 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:47,543 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 16:34:47,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:47,742 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:47,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:47,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1425875505, now seen corresponding path program 4 times [2023-11-17 16:34:47,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:47,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539248372] [2023-11-17 16:34:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:47,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:47,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:47,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539248372] [2023-11-17 16:34:47,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539248372] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:47,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479977696] [2023-11-17 16:34:47,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:34:47,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:47,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:47,782 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 16:34:47,804 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 16:34:47,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:34:47,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:47,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 16:34:47,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:47,876 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 16:34:47,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:47,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479977696] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:47,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:47,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 16:34:47,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810596643] [2023-11-17 16:34:47,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:47,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:34:47,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:47,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:34:47,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:34:47,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:47,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 570 flow. Second operand has 11 states, 11 states have (on average 63.72727272727273) internal successors, (701), 11 states have internal predecessors, (701), 0 states have call successors, (0), 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 16:34:47,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:47,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:47,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:48,075 INFO L124 PetriNetUnfolderBase]: 246/525 cut-off events. [2023-11-17 16:34:48,075 INFO L125 PetriNetUnfolderBase]: For 3464/3464 co-relation queries the response was YES. [2023-11-17 16:34:48,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2831 conditions, 525 events. 246/525 cut-off events. For 3464/3464 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2686 event pairs, 8 based on Foata normal form. 28/552 useless extension candidates. Maximal degree in co-relation 1756. Up to 204 conditions per place. [2023-11-17 16:34:48,081 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 71 selfloop transitions, 38 changer transitions 2/113 dead transitions. [2023-11-17 16:34:48,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 113 transitions, 1254 flow [2023-11-17 16:34:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 16:34:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 16:34:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 810 transitions. [2023-11-17 16:34:48,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-11-17 16:34:48,083 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 810 transitions. [2023-11-17 16:34:48,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 810 transitions. [2023-11-17 16:34:48,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:48,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 810 transitions. [2023-11-17 16:34:48,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 67.5) internal successors, (810), 12 states have internal predecessors, (810), 0 states have call successors, (0), 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 16:34:48,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 150.0) internal successors, (1950), 13 states have internal predecessors, (1950), 0 states have call successors, (0), 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 16:34:48,088 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 150.0) internal successors, (1950), 13 states have internal predecessors, (1950), 0 states have call successors, (0), 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 16:34:48,088 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 570 flow. Second operand 12 states and 810 transitions. [2023-11-17 16:34:48,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 113 transitions, 1254 flow [2023-11-17 16:34:48,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 113 transitions, 1193 flow, removed 29 selfloop flow, removed 1 redundant places. [2023-11-17 16:34:48,096 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 926 flow [2023-11-17 16:34:48,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=926, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2023-11-17 16:34:48,097 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 52 predicate places. [2023-11-17 16:34:48,097 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 926 flow [2023-11-17 16:34:48,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 63.72727272727273) internal successors, (701), 11 states have internal predecessors, (701), 0 states have call successors, (0), 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 16:34:48,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:48,097 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:48,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-17 16:34:48,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:48,304 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:48,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:48,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1352997121, now seen corresponding path program 5 times [2023-11-17 16:34:48,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:48,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858686482] [2023-11-17 16:34:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:48,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:48,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:48,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858686482] [2023-11-17 16:34:48,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858686482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:48,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916373132] [2023-11-17 16:34:48,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:34:48,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:48,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:48,353 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 16:34:48,380 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 16:34:48,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:34:48,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:48,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 16:34:48,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:48,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:48,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916373132] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:48,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:48,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-17 16:34:48,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619233818] [2023-11-17 16:34:48,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:48,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:34:48,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:48,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:34:48,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:34:48,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:48,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 926 flow. Second operand has 10 states, 10 states have (on average 63.8) internal successors, (638), 10 states have internal predecessors, (638), 0 states have call successors, (0), 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 16:34:48,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:48,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:48,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:48,590 INFO L124 PetriNetUnfolderBase]: 252/573 cut-off events. [2023-11-17 16:34:48,591 INFO L125 PetriNetUnfolderBase]: For 6389/6389 co-relation queries the response was YES. [2023-11-17 16:34:48,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3625 conditions, 573 events. 252/573 cut-off events. For 6389/6389 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3163 event pairs, 18 based on Foata normal form. 32/604 useless extension candidates. Maximal degree in co-relation 2894. Up to 196 conditions per place. [2023-11-17 16:34:48,595 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 74 selfloop transitions, 35 changer transitions 13/124 dead transitions. [2023-11-17 16:34:48,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 1735 flow [2023-11-17 16:34:48,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:34:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:34:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 605 transitions. [2023-11-17 16:34:48,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44814814814814813 [2023-11-17 16:34:48,597 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 605 transitions. [2023-11-17 16:34:48,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 605 transitions. [2023-11-17 16:34:48,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:48,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 605 transitions. [2023-11-17 16:34:48,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 67.22222222222223) internal successors, (605), 9 states have internal predecessors, (605), 0 states have call successors, (0), 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 16:34:48,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 0 states have call successors, (0), 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 16:34:48,600 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 0 states have call successors, (0), 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 16:34:48,600 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 926 flow. Second operand 9 states and 605 transitions. [2023-11-17 16:34:48,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 1735 flow [2023-11-17 16:34:48,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 124 transitions, 1503 flow, removed 112 selfloop flow, removed 2 redundant places. [2023-11-17 16:34:48,616 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 1126 flow [2023-11-17 16:34:48,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1126, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2023-11-17 16:34:48,617 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 63 predicate places. [2023-11-17 16:34:48,617 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 1126 flow [2023-11-17 16:34:48,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 63.8) internal successors, (638), 10 states have internal predecessors, (638), 0 states have call successors, (0), 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 16:34:48,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:48,617 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:48,627 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 16:34:48,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:48,822 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:48,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:48,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1311051543, now seen corresponding path program 6 times [2023-11-17 16:34:48,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:48,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085829727] [2023-11-17 16:34:48,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:48,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:48,854 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 16:34:48,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:48,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085829727] [2023-11-17 16:34:48,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085829727] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:48,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381711925] [2023-11-17 16:34:48,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:34:48,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:48,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:48,856 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 16:34:48,859 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 16:34:48,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:34:48,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:48,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:34:48,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:48,936 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:34:48,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381711925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:34:48,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:34:48,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 9 [2023-11-17 16:34:48,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852751691] [2023-11-17 16:34:48,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:34:48,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:34:48,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:48,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:34:48,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-17 16:34:48,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:48,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 1126 flow. Second operand has 6 states, 6 states have (on average 63.333333333333336) internal successors, (380), 6 states have internal predecessors, (380), 0 states have call successors, (0), 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 16:34:48,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:48,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:48,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:49,013 INFO L124 PetriNetUnfolderBase]: 219/478 cut-off events. [2023-11-17 16:34:49,013 INFO L125 PetriNetUnfolderBase]: For 6345/6348 co-relation queries the response was YES. [2023-11-17 16:34:49,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3031 conditions, 478 events. 219/478 cut-off events. For 6345/6348 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2400 event pairs, 21 based on Foata normal form. 3/479 useless extension candidates. Maximal degree in co-relation 2614. Up to 253 conditions per place. [2023-11-17 16:34:49,017 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 67 selfloop transitions, 12 changer transitions 18/99 dead transitions. [2023-11-17 16:34:49,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 99 transitions, 1459 flow [2023-11-17 16:34:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:34:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:34:49,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 398 transitions. [2023-11-17 16:34:49,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44222222222222224 [2023-11-17 16:34:49,018 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 398 transitions. [2023-11-17 16:34:49,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 398 transitions. [2023-11-17 16:34:49,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:49,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 398 transitions. [2023-11-17 16:34:49,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 0 states have call successors, (0), 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 16:34:49,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 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 16:34:49,020 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 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 16:34:49,020 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 1126 flow. Second operand 6 states and 398 transitions. [2023-11-17 16:34:49,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 99 transitions, 1459 flow [2023-11-17 16:34:49,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 99 transitions, 1330 flow, removed 63 selfloop flow, removed 1 redundant places. [2023-11-17 16:34:49,032 INFO L231 Difference]: Finished difference. Result has 89 places, 73 transitions, 900 flow [2023-11-17 16:34:49,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=900, PETRI_PLACES=89, PETRI_TRANSITIONS=73} [2023-11-17 16:34:49,032 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 69 predicate places. [2023-11-17 16:34:49,033 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 73 transitions, 900 flow [2023-11-17 16:34:49,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.333333333333336) internal successors, (380), 6 states have internal predecessors, (380), 0 states have call successors, (0), 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 16:34:49,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:49,033 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:49,040 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 16:34:49,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:49,241 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:49,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:49,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2058064667, now seen corresponding path program 7 times [2023-11-17 16:34:49,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:49,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582282688] [2023-11-17 16:34:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:49,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:49,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:49,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582282688] [2023-11-17 16:34:49,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582282688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:49,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419209463] [2023-11-17 16:34:49,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:34:49,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:49,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:49,274 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 16:34:49,292 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 16:34:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:49,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 16:34:49,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:49,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:49,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419209463] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:49,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:49,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-17 16:34:49,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22605875] [2023-11-17 16:34:49,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:49,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:34:49,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:49,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:34:49,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:34:49,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:49,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 73 transitions, 900 flow. Second operand has 11 states, 11 states have (on average 63.72727272727273) internal successors, (701), 11 states have internal predecessors, (701), 0 states have call successors, (0), 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 16:34:49,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:49,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:49,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:49,531 INFO L124 PetriNetUnfolderBase]: 197/413 cut-off events. [2023-11-17 16:34:49,531 INFO L125 PetriNetUnfolderBase]: For 5888/5888 co-relation queries the response was YES. [2023-11-17 16:34:49,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2534 conditions, 413 events. 197/413 cut-off events. For 5888/5888 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1874 event pairs, 14 based on Foata normal form. 6/418 useless extension candidates. Maximal degree in co-relation 2456. Up to 182 conditions per place. [2023-11-17 16:34:49,534 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 63 selfloop transitions, 36 changer transitions 1/102 dead transitions. [2023-11-17 16:34:49,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 102 transitions, 1246 flow [2023-11-17 16:34:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:34:49,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:34:49,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 601 transitions. [2023-11-17 16:34:49,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451851851851852 [2023-11-17 16:34:49,536 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 601 transitions. [2023-11-17 16:34:49,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 601 transitions. [2023-11-17 16:34:49,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:49,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 601 transitions. [2023-11-17 16:34:49,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 66.77777777777777) internal successors, (601), 9 states have internal predecessors, (601), 0 states have call successors, (0), 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 16:34:49,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 0 states have call successors, (0), 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 16:34:49,539 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 150.0) internal successors, (1500), 10 states have internal predecessors, (1500), 0 states have call successors, (0), 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 16:34:49,539 INFO L175 Difference]: Start difference. First operand has 89 places, 73 transitions, 900 flow. Second operand 9 states and 601 transitions. [2023-11-17 16:34:49,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 102 transitions, 1246 flow [2023-11-17 16:34:49,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 102 transitions, 1147 flow, removed 40 selfloop flow, removed 7 redundant places. [2023-11-17 16:34:49,551 INFO L231 Difference]: Finished difference. Result has 89 places, 76 transitions, 947 flow [2023-11-17 16:34:49,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=947, PETRI_PLACES=89, PETRI_TRANSITIONS=76} [2023-11-17 16:34:49,552 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 69 predicate places. [2023-11-17 16:34:49,552 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 76 transitions, 947 flow [2023-11-17 16:34:49,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 63.72727272727273) internal successors, (701), 11 states have internal predecessors, (701), 0 states have call successors, (0), 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 16:34:49,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:49,553 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:49,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:49,760 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,SelfDestructingSolverStorable11 [2023-11-17 16:34:49,760 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:49,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:49,761 INFO L85 PathProgramCache]: Analyzing trace with hash -807794697, now seen corresponding path program 8 times [2023-11-17 16:34:49,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:49,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732374159] [2023-11-17 16:34:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:49,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:49,815 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 16:34:49,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:49,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732374159] [2023-11-17 16:34:49,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732374159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:49,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538764830] [2023-11-17 16:34:49,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:34:49,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:49,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:49,817 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 16:34:49,821 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 16:34:49,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:34:49,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:49,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 16:34:49,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:49,904 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 16:34:49,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:49,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538764830] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:49,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:49,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-17 16:34:49,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531432629] [2023-11-17 16:34:49,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:49,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:34:49,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:49,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:34:49,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:34:49,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:49,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 76 transitions, 947 flow. Second operand has 11 states, 11 states have (on average 63.72727272727273) internal successors, (701), 11 states have internal predecessors, (701), 0 states have call successors, (0), 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 16:34:49,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:49,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:49,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:50,036 INFO L124 PetriNetUnfolderBase]: 190/394 cut-off events. [2023-11-17 16:34:50,036 INFO L125 PetriNetUnfolderBase]: For 4407/4407 co-relation queries the response was YES. [2023-11-17 16:34:50,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2413 conditions, 394 events. 190/394 cut-off events. For 4407/4407 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1717 event pairs, 16 based on Foata normal form. 4/397 useless extension candidates. Maximal degree in co-relation 2152. Up to 239 conditions per place. [2023-11-17 16:34:50,039 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 65 selfloop transitions, 18 changer transitions 7/92 dead transitions. [2023-11-17 16:34:50,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 1195 flow [2023-11-17 16:34:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:34:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:34:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 526 transitions. [2023-11-17 16:34:50,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43833333333333335 [2023-11-17 16:34:50,041 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 526 transitions. [2023-11-17 16:34:50,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 526 transitions. [2023-11-17 16:34:50,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:50,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 526 transitions. [2023-11-17 16:34:50,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 65.75) internal successors, (526), 8 states have internal predecessors, (526), 0 states have call successors, (0), 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 16:34:50,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 150.0) internal successors, (1350), 9 states have internal predecessors, (1350), 0 states have call successors, (0), 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 16:34:50,043 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 150.0) internal successors, (1350), 9 states have internal predecessors, (1350), 0 states have call successors, (0), 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 16:34:50,043 INFO L175 Difference]: Start difference. First operand has 89 places, 76 transitions, 947 flow. Second operand 8 states and 526 transitions. [2023-11-17 16:34:50,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 1195 flow [2023-11-17 16:34:50,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 92 transitions, 1113 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-11-17 16:34:50,051 INFO L231 Difference]: Finished difference. Result has 92 places, 74 transitions, 889 flow [2023-11-17 16:34:50,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=889, PETRI_PLACES=92, PETRI_TRANSITIONS=74} [2023-11-17 16:34:50,052 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-11-17 16:34:50,052 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 74 transitions, 889 flow [2023-11-17 16:34:50,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 63.72727272727273) internal successors, (701), 11 states have internal predecessors, (701), 0 states have call successors, (0), 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 16:34:50,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:50,052 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:50,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-17 16:34:50,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 16:34:50,257 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:50,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:50,257 INFO L85 PathProgramCache]: Analyzing trace with hash -944771367, now seen corresponding path program 9 times [2023-11-17 16:34:50,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:50,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713727919] [2023-11-17 16:34:50,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:50,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:50,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:50,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713727919] [2023-11-17 16:34:50,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713727919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:50,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756107589] [2023-11-17 16:34:50,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:34:50,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:50,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:50,302 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:50,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 16:34:50,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:34:50,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:50,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 16:34:50,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:50,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:50,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756107589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:50,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:50,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-17 16:34:50,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781922125] [2023-11-17 16:34:50,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:50,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:34:50,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:50,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:34:50,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:34:50,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:50,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 74 transitions, 889 flow. Second operand has 11 states, 11 states have (on average 63.72727272727273) internal successors, (701), 11 states have internal predecessors, (701), 0 states have call successors, (0), 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 16:34:50,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:50,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:50,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:50,618 INFO L124 PetriNetUnfolderBase]: 243/516 cut-off events. [2023-11-17 16:34:50,619 INFO L125 PetriNetUnfolderBase]: For 6306/6306 co-relation queries the response was YES. [2023-11-17 16:34:50,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3287 conditions, 516 events. 243/516 cut-off events. For 6306/6306 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2519 event pairs, 12 based on Foata normal form. 6/521 useless extension candidates. Maximal degree in co-relation 2902. Up to 137 conditions per place. [2023-11-17 16:34:50,623 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 79 selfloop transitions, 56 changer transitions 0/137 dead transitions. [2023-11-17 16:34:50,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 137 transitions, 1731 flow [2023-11-17 16:34:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:34:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:34:50,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 741 transitions. [2023-11-17 16:34:50,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490909090909091 [2023-11-17 16:34:50,625 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 741 transitions. [2023-11-17 16:34:50,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 741 transitions. [2023-11-17 16:34:50,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:50,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 741 transitions. [2023-11-17 16:34:50,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 67.36363636363636) internal successors, (741), 11 states have internal predecessors, (741), 0 states have call successors, (0), 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 16:34:50,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 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 16:34:50,628 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 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 16:34:50,628 INFO L175 Difference]: Start difference. First operand has 92 places, 74 transitions, 889 flow. Second operand 11 states and 741 transitions. [2023-11-17 16:34:50,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 137 transitions, 1731 flow [2023-11-17 16:34:50,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 137 transitions, 1673 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-11-17 16:34:50,639 INFO L231 Difference]: Finished difference. Result has 102 places, 92 transitions, 1373 flow [2023-11-17 16:34:50,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1373, PETRI_PLACES=102, PETRI_TRANSITIONS=92} [2023-11-17 16:34:50,639 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 82 predicate places. [2023-11-17 16:34:50,640 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 92 transitions, 1373 flow [2023-11-17 16:34:50,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 63.72727272727273) internal successors, (701), 11 states have internal predecessors, (701), 0 states have call successors, (0), 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 16:34:50,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:50,640 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:50,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:50,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 16:34:50,845 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:50,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:50,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2031037817, now seen corresponding path program 10 times [2023-11-17 16:34:50,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:50,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447682318] [2023-11-17 16:34:50,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:50,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:50,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:50,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447682318] [2023-11-17 16:34:50,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447682318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:50,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710179182] [2023-11-17 16:34:50,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:34:50,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:50,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:50,911 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:50,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 16:34:50,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:34:50,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:50,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:34:50,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:51,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:51,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710179182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:51,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:51,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 3] total 13 [2023-11-17 16:34:51,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151974198] [2023-11-17 16:34:51,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:51,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:34:51,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:51,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:34:51,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:34:51,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:51,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 92 transitions, 1373 flow. Second operand has 15 states, 15 states have (on average 63.86666666666667) internal successors, (958), 15 states have internal predecessors, (958), 0 states have call successors, (0), 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 16:34:51,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:51,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:51,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:51,305 INFO L124 PetriNetUnfolderBase]: 442/868 cut-off events. [2023-11-17 16:34:51,305 INFO L125 PetriNetUnfolderBase]: For 17970/17970 co-relation queries the response was YES. [2023-11-17 16:34:51,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6516 conditions, 868 events. 442/868 cut-off events. For 17970/17970 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4622 event pairs, 40 based on Foata normal form. 59/926 useless extension candidates. Maximal degree in co-relation 6039. Up to 370 conditions per place. [2023-11-17 16:34:51,313 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 98 selfloop transitions, 64 changer transitions 11/175 dead transitions. [2023-11-17 16:34:51,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 175 transitions, 2836 flow [2023-11-17 16:34:51,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:34:51,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:34:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 679 transitions. [2023-11-17 16:34:51,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45266666666666666 [2023-11-17 16:34:51,315 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 679 transitions. [2023-11-17 16:34:51,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 679 transitions. [2023-11-17 16:34:51,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:51,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 679 transitions. [2023-11-17 16:34:51,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 67.9) internal successors, (679), 10 states have internal predecessors, (679), 0 states have call successors, (0), 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 16:34:51,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 150.0) internal successors, (1650), 11 states have internal predecessors, (1650), 0 states have call successors, (0), 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 16:34:51,318 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 150.0) internal successors, (1650), 11 states have internal predecessors, (1650), 0 states have call successors, (0), 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 16:34:51,319 INFO L175 Difference]: Start difference. First operand has 102 places, 92 transitions, 1373 flow. Second operand 10 states and 679 transitions. [2023-11-17 16:34:51,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 175 transitions, 2836 flow [2023-11-17 16:34:51,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 175 transitions, 2619 flow, removed 102 selfloop flow, removed 3 redundant places. [2023-11-17 16:34:51,350 INFO L231 Difference]: Finished difference. Result has 113 places, 127 transitions, 2072 flow [2023-11-17 16:34:51,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2072, PETRI_PLACES=113, PETRI_TRANSITIONS=127} [2023-11-17 16:34:51,350 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 93 predicate places. [2023-11-17 16:34:51,350 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 127 transitions, 2072 flow [2023-11-17 16:34:51,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.86666666666667) internal successors, (958), 15 states have internal predecessors, (958), 0 states have call successors, (0), 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 16:34:51,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:51,351 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:51,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:51,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 16:34:51,556 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:51,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:51,556 INFO L85 PathProgramCache]: Analyzing trace with hash 8132577, now seen corresponding path program 11 times [2023-11-17 16:34:51,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:51,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062074452] [2023-11-17 16:34:51,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:51,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:51,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:51,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062074452] [2023-11-17 16:34:51,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062074452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:51,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74560529] [2023-11-17 16:34:51,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:34:51,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:51,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:51,613 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:51,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 16:34:51,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:34:51,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:51,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:34:51,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:51,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:34:51,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74560529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:51,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:51,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 3] total 9 [2023-11-17 16:34:51,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126432826] [2023-11-17 16:34:51,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:51,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:34:51,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:51,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:34:51,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:34:51,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:51,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 127 transitions, 2072 flow. Second operand has 11 states, 11 states have (on average 63.90909090909091) internal successors, (703), 11 states have internal predecessors, (703), 0 states have call successors, (0), 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 16:34:51,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:51,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:51,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:51,994 INFO L124 PetriNetUnfolderBase]: 554/1125 cut-off events. [2023-11-17 16:34:51,994 INFO L125 PetriNetUnfolderBase]: For 23691/23691 co-relation queries the response was YES. [2023-11-17 16:34:51,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8979 conditions, 1125 events. 554/1125 cut-off events. For 23691/23691 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6680 event pairs, 96 based on Foata normal form. 11/1135 useless extension candidates. Maximal degree in co-relation 8709. Up to 783 conditions per place. [2023-11-17 16:34:52,005 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 146 selfloop transitions, 61 changer transitions 10/219 dead transitions. [2023-11-17 16:34:52,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 219 transitions, 3925 flow [2023-11-17 16:34:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:34:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:34:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 749 transitions. [2023-11-17 16:34:52,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539393939393939 [2023-11-17 16:34:52,007 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 749 transitions. [2023-11-17 16:34:52,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 749 transitions. [2023-11-17 16:34:52,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:52,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 749 transitions. [2023-11-17 16:34:52,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 68.0909090909091) internal successors, (749), 11 states have internal predecessors, (749), 0 states have call successors, (0), 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 16:34:52,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 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 16:34:52,010 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 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 16:34:52,010 INFO L175 Difference]: Start difference. First operand has 113 places, 127 transitions, 2072 flow. Second operand 11 states and 749 transitions. [2023-11-17 16:34:52,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 219 transitions, 3925 flow [2023-11-17 16:34:52,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 219 transitions, 3644 flow, removed 127 selfloop flow, removed 4 redundant places. [2023-11-17 16:34:52,059 INFO L231 Difference]: Finished difference. Result has 127 places, 173 transitions, 2954 flow [2023-11-17 16:34:52,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2954, PETRI_PLACES=127, PETRI_TRANSITIONS=173} [2023-11-17 16:34:52,060 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 107 predicate places. [2023-11-17 16:34:52,060 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 173 transitions, 2954 flow [2023-11-17 16:34:52,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 63.90909090909091) internal successors, (703), 11 states have internal predecessors, (703), 0 states have call successors, (0), 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 16:34:52,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:52,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:52,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:52,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 16:34:52,265 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:52,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:52,265 INFO L85 PathProgramCache]: Analyzing trace with hash 370567103, now seen corresponding path program 12 times [2023-11-17 16:34:52,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:52,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928270905] [2023-11-17 16:34:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:52,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:52,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:52,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928270905] [2023-11-17 16:34:52,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928270905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:52,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642377346] [2023-11-17 16:34:52,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:34:52,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:52,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:52,355 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:52,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 16:34:52,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:34:52,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:52,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:34:52,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:52,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:52,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642377346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:52,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:52,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 3] total 13 [2023-11-17 16:34:52,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259622168] [2023-11-17 16:34:52,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:52,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:34:52,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:52,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:34:52,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:34:52,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:52,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 173 transitions, 2954 flow. Second operand has 15 states, 15 states have (on average 63.666666666666664) internal successors, (955), 15 states have internal predecessors, (955), 0 states have call successors, (0), 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 16:34:52,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:52,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:52,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:52,835 INFO L124 PetriNetUnfolderBase]: 602/1230 cut-off events. [2023-11-17 16:34:52,835 INFO L125 PetriNetUnfolderBase]: For 32129/32129 co-relation queries the response was YES. [2023-11-17 16:34:52,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10118 conditions, 1230 events. 602/1230 cut-off events. For 32129/32129 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7471 event pairs, 119 based on Foata normal form. 9/1238 useless extension candidates. Maximal degree in co-relation 9031. Up to 1053 conditions per place. [2023-11-17 16:34:52,846 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 185 selfloop transitions, 36 changer transitions 5/228 dead transitions. [2023-11-17 16:34:52,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 228 transitions, 4269 flow [2023-11-17 16:34:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:34:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:34:52,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 677 transitions. [2023-11-17 16:34:52,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513333333333333 [2023-11-17 16:34:52,848 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 677 transitions. [2023-11-17 16:34:52,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 677 transitions. [2023-11-17 16:34:52,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:52,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 677 transitions. [2023-11-17 16:34:52,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 67.7) internal successors, (677), 10 states have internal predecessors, (677), 0 states have call successors, (0), 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 16:34:52,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 150.0) internal successors, (1650), 11 states have internal predecessors, (1650), 0 states have call successors, (0), 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 16:34:52,851 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 150.0) internal successors, (1650), 11 states have internal predecessors, (1650), 0 states have call successors, (0), 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 16:34:52,851 INFO L175 Difference]: Start difference. First operand has 127 places, 173 transitions, 2954 flow. Second operand 10 states and 677 transitions. [2023-11-17 16:34:52,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 228 transitions, 4269 flow [2023-11-17 16:34:52,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 228 transitions, 3868 flow, removed 199 selfloop flow, removed 1 redundant places. [2023-11-17 16:34:52,913 INFO L231 Difference]: Finished difference. Result has 141 places, 195 transitions, 3155 flow [2023-11-17 16:34:52,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3155, PETRI_PLACES=141, PETRI_TRANSITIONS=195} [2023-11-17 16:34:52,914 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 121 predicate places. [2023-11-17 16:34:52,914 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 195 transitions, 3155 flow [2023-11-17 16:34:52,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.666666666666664) internal successors, (955), 15 states have internal predecessors, (955), 0 states have call successors, (0), 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 16:34:52,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:52,914 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:52,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:53,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-17 16:34:53,115 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:53,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:53,115 INFO L85 PathProgramCache]: Analyzing trace with hash 418690789, now seen corresponding path program 13 times [2023-11-17 16:34:53,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:53,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275799237] [2023-11-17 16:34:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:53,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:53,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:53,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275799237] [2023-11-17 16:34:53,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275799237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:53,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453663823] [2023-11-17 16:34:53,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:34:53,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:53,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:53,162 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:53,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 16:34:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:53,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:34:53,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:53,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:53,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453663823] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:53,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:53,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 16:34:53,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047384885] [2023-11-17 16:34:53,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:53,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:34:53,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:53,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:34:53,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:34:53,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:53,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 195 transitions, 3155 flow. Second operand has 14 states, 14 states have (on average 63.285714285714285) internal successors, (886), 14 states have internal predecessors, (886), 0 states have call successors, (0), 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 16:34:53,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:53,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:53,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:53,587 INFO L124 PetriNetUnfolderBase]: 604/1307 cut-off events. [2023-11-17 16:34:53,587 INFO L125 PetriNetUnfolderBase]: For 40226/40226 co-relation queries the response was YES. [2023-11-17 16:34:53,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10871 conditions, 1307 events. 604/1307 cut-off events. For 40226/40226 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 8462 event pairs, 40 based on Foata normal form. 60/1366 useless extension candidates. Maximal degree in co-relation 9520. Up to 355 conditions per place. [2023-11-17 16:34:53,621 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 115 selfloop transitions, 121 changer transitions 21/259 dead transitions. [2023-11-17 16:34:53,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 259 transitions, 4600 flow [2023-11-17 16:34:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 16:34:53,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 16:34:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 803 transitions. [2023-11-17 16:34:53,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461111111111111 [2023-11-17 16:34:53,634 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 803 transitions. [2023-11-17 16:34:53,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 803 transitions. [2023-11-17 16:34:53,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:53,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 803 transitions. [2023-11-17 16:34:53,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 66.91666666666667) internal successors, (803), 12 states have internal predecessors, (803), 0 states have call successors, (0), 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 16:34:53,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 150.0) internal successors, (1950), 13 states have internal predecessors, (1950), 0 states have call successors, (0), 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 16:34:53,641 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 150.0) internal successors, (1950), 13 states have internal predecessors, (1950), 0 states have call successors, (0), 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 16:34:53,641 INFO L175 Difference]: Start difference. First operand has 141 places, 195 transitions, 3155 flow. Second operand 12 states and 803 transitions. [2023-11-17 16:34:53,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 259 transitions, 4600 flow [2023-11-17 16:34:53,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 259 transitions, 4408 flow, removed 90 selfloop flow, removed 2 redundant places. [2023-11-17 16:34:53,711 INFO L231 Difference]: Finished difference. Result has 155 places, 201 transitions, 3841 flow [2023-11-17 16:34:53,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3841, PETRI_PLACES=155, PETRI_TRANSITIONS=201} [2023-11-17 16:34:53,712 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2023-11-17 16:34:53,712 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 201 transitions, 3841 flow [2023-11-17 16:34:53,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 63.285714285714285) internal successors, (886), 14 states have internal predecessors, (886), 0 states have call successors, (0), 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 16:34:53,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:53,713 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:53,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:53,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:53,917 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:53,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:53,918 INFO L85 PathProgramCache]: Analyzing trace with hash 837192397, now seen corresponding path program 14 times [2023-11-17 16:34:53,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:53,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243244135] [2023-11-17 16:34:53,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:53,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:53,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:53,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243244135] [2023-11-17 16:34:53,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243244135] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:53,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262741607] [2023-11-17 16:34:53,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:34:53,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:53,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:53,958 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:53,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 16:34:54,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:34:54,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:54,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:34:54,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:54,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:54,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262741607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:54,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:54,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-17 16:34:54,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387448056] [2023-11-17 16:34:54,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:54,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 16:34:54,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:54,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 16:34:54,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-11-17 16:34:54,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:54,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 201 transitions, 3841 flow. Second operand has 16 states, 16 states have (on average 63.25) internal successors, (1012), 16 states have internal predecessors, (1012), 0 states have call successors, (0), 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 16:34:54,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:54,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:54,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:54,443 INFO L124 PetriNetUnfolderBase]: 530/1113 cut-off events. [2023-11-17 16:34:54,443 INFO L125 PetriNetUnfolderBase]: For 33542/33542 co-relation queries the response was YES. [2023-11-17 16:34:54,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9764 conditions, 1113 events. 530/1113 cut-off events. For 33542/33542 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6686 event pairs, 42 based on Foata normal form. 6/1118 useless extension candidates. Maximal degree in co-relation 8598. Up to 355 conditions per place. [2023-11-17 16:34:54,452 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 108 selfloop transitions, 134 changer transitions 4/248 dead transitions. [2023-11-17 16:34:54,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 248 transitions, 4708 flow [2023-11-17 16:34:54,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 16:34:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 16:34:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 992 transitions. [2023-11-17 16:34:54,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408888888888889 [2023-11-17 16:34:54,454 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 992 transitions. [2023-11-17 16:34:54,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 992 transitions. [2023-11-17 16:34:54,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:54,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 992 transitions. [2023-11-17 16:34:54,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 66.13333333333334) internal successors, (992), 15 states have internal predecessors, (992), 0 states have call successors, (0), 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 16:34:54,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 150.0) internal successors, (2400), 16 states have internal predecessors, (2400), 0 states have call successors, (0), 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 16:34:54,457 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 150.0) internal successors, (2400), 16 states have internal predecessors, (2400), 0 states have call successors, (0), 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 16:34:54,457 INFO L175 Difference]: Start difference. First operand has 155 places, 201 transitions, 3841 flow. Second operand 15 states and 992 transitions. [2023-11-17 16:34:54,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 248 transitions, 4708 flow [2023-11-17 16:34:54,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 248 transitions, 4199 flow, removed 248 selfloop flow, removed 2 redundant places. [2023-11-17 16:34:54,565 INFO L231 Difference]: Finished difference. Result has 169 places, 205 transitions, 3804 flow [2023-11-17 16:34:54,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3804, PETRI_PLACES=169, PETRI_TRANSITIONS=205} [2023-11-17 16:34:54,566 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 149 predicate places. [2023-11-17 16:34:54,566 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 205 transitions, 3804 flow [2023-11-17 16:34:54,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.25) internal successors, (1012), 16 states have internal predecessors, (1012), 0 states have call successors, (0), 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 16:34:54,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:54,566 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:54,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:54,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:54,771 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:54,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:54,771 INFO L85 PathProgramCache]: Analyzing trace with hash 433619877, now seen corresponding path program 15 times [2023-11-17 16:34:54,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:54,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591688696] [2023-11-17 16:34:54,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:54,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:54,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:54,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591688696] [2023-11-17 16:34:54,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591688696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:54,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036575159] [2023-11-17 16:34:54,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:34:54,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:54,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:54,808 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:54,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 16:34:54,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:34:54,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:54,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:34:54,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:34:54,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:34:54,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036575159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:34:54,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:34:54,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2023-11-17 16:34:54,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912859749] [2023-11-17 16:34:54,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:34:54,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:34:54,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:54,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:34:54,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:34:54,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:54,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 205 transitions, 3804 flow. Second operand has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 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 16:34:54,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:54,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:54,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:55,062 INFO L124 PetriNetUnfolderBase]: 523/1083 cut-off events. [2023-11-17 16:34:55,062 INFO L125 PetriNetUnfolderBase]: For 19150/19150 co-relation queries the response was YES. [2023-11-17 16:34:55,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8680 conditions, 1083 events. 523/1083 cut-off events. For 19150/19150 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6416 event pairs, 33 based on Foata normal form. 14/1096 useless extension candidates. Maximal degree in co-relation 8072. Up to 389 conditions per place. [2023-11-17 16:34:55,072 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 148 selfloop transitions, 15 changer transitions 66/231 dead transitions. [2023-11-17 16:34:55,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 231 transitions, 4583 flow [2023-11-17 16:34:55,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:34:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:34:55,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 399 transitions. [2023-11-17 16:34:55,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44333333333333336 [2023-11-17 16:34:55,075 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 399 transitions. [2023-11-17 16:34:55,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 399 transitions. [2023-11-17 16:34:55,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:55,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 399 transitions. [2023-11-17 16:34:55,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.5) internal successors, (399), 6 states have internal predecessors, (399), 0 states have call successors, (0), 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 16:34:55,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 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 16:34:55,087 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 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 16:34:55,087 INFO L175 Difference]: Start difference. First operand has 169 places, 205 transitions, 3804 flow. Second operand 6 states and 399 transitions. [2023-11-17 16:34:55,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 231 transitions, 4583 flow [2023-11-17 16:34:55,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 231 transitions, 4336 flow, removed 32 selfloop flow, removed 7 redundant places. [2023-11-17 16:34:55,156 INFO L231 Difference]: Finished difference. Result has 169 places, 158 transitions, 2818 flow [2023-11-17 16:34:55,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2818, PETRI_PLACES=169, PETRI_TRANSITIONS=158} [2023-11-17 16:34:55,156 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 149 predicate places. [2023-11-17 16:34:55,157 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 158 transitions, 2818 flow [2023-11-17 16:34:55,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 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 16:34:55,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:55,157 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:55,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:55,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:55,361 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:55,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:55,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1228838583, now seen corresponding path program 16 times [2023-11-17 16:34:55,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:55,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687376808] [2023-11-17 16:34:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:55,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:55,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:55,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687376808] [2023-11-17 16:34:55,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687376808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:55,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577683891] [2023-11-17 16:34:55,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:34:55,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:55,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:55,406 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:55,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 16:34:55,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:34:55,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:55,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:34:55,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:55,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:55,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577683891] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:55,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:55,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-17 16:34:55,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109214297] [2023-11-17 16:34:55,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:55,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 16:34:55,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:55,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 16:34:55,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2023-11-17 16:34:55,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:55,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 158 transitions, 2818 flow. Second operand has 16 states, 16 states have (on average 63.25) internal successors, (1012), 16 states have internal predecessors, (1012), 0 states have call successors, (0), 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 16:34:55,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:55,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:55,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:55,837 INFO L124 PetriNetUnfolderBase]: 335/695 cut-off events. [2023-11-17 16:34:55,837 INFO L125 PetriNetUnfolderBase]: For 19550/19550 co-relation queries the response was YES. [2023-11-17 16:34:55,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6191 conditions, 695 events. 335/695 cut-off events. For 19550/19550 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3604 event pairs, 24 based on Foata normal form. 22/716 useless extension candidates. Maximal degree in co-relation 6064. Up to 178 conditions per place. [2023-11-17 16:34:55,842 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 104 selfloop transitions, 94 changer transitions 20/220 dead transitions. [2023-11-17 16:34:55,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 220 transitions, 4452 flow [2023-11-17 16:34:55,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:34:55,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:34:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1113 transitions. [2023-11-17 16:34:55,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364705882352941 [2023-11-17 16:34:55,844 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1113 transitions. [2023-11-17 16:34:55,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1113 transitions. [2023-11-17 16:34:55,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:55,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1113 transitions. [2023-11-17 16:34:55,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.47058823529412) internal successors, (1113), 17 states have internal predecessors, (1113), 0 states have call successors, (0), 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 16:34:55,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 150.0) internal successors, (2700), 18 states have internal predecessors, (2700), 0 states have call successors, (0), 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 16:34:55,848 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 150.0) internal successors, (2700), 18 states have internal predecessors, (2700), 0 states have call successors, (0), 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 16:34:55,848 INFO L175 Difference]: Start difference. First operand has 169 places, 158 transitions, 2818 flow. Second operand 17 states and 1113 transitions. [2023-11-17 16:34:55,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 220 transitions, 4452 flow [2023-11-17 16:34:55,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 220 transitions, 4160 flow, removed 93 selfloop flow, removed 13 redundant places. [2023-11-17 16:34:55,887 INFO L231 Difference]: Finished difference. Result has 172 places, 171 transitions, 3418 flow [2023-11-17 16:34:55,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=2639, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3418, PETRI_PLACES=172, PETRI_TRANSITIONS=171} [2023-11-17 16:34:55,887 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 152 predicate places. [2023-11-17 16:34:55,887 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 171 transitions, 3418 flow [2023-11-17 16:34:55,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.25) internal successors, (1012), 16 states have internal predecessors, (1012), 0 states have call successors, (0), 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 16:34:55,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:55,888 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:55,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:56,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:56,091 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:56,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:56,091 INFO L85 PathProgramCache]: Analyzing trace with hash -374920777, now seen corresponding path program 17 times [2023-11-17 16:34:56,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:56,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568026964] [2023-11-17 16:34:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:56,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:56,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:56,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568026964] [2023-11-17 16:34:56,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568026964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:56,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259147596] [2023-11-17 16:34:56,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:34:56,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:56,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:56,136 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:56,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 16:34:56,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:34:56,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:56,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:34:56,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:56,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:56,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259147596] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:56,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:56,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-17 16:34:56,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514319526] [2023-11-17 16:34:56,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:56,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:34:56,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:56,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:34:56,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:34:56,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:56,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 171 transitions, 3418 flow. Second operand has 15 states, 15 states have (on average 63.266666666666666) internal successors, (949), 15 states have internal predecessors, (949), 0 states have call successors, (0), 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 16:34:56,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:56,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:56,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:56,532 INFO L124 PetriNetUnfolderBase]: 338/664 cut-off events. [2023-11-17 16:34:56,532 INFO L125 PetriNetUnfolderBase]: For 14144/14144 co-relation queries the response was YES. [2023-11-17 16:34:56,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6178 conditions, 664 events. 338/664 cut-off events. For 14144/14144 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3176 event pairs, 4 based on Foata normal form. 8/671 useless extension candidates. Maximal degree in co-relation 6036. Up to 273 conditions per place. [2023-11-17 16:34:56,538 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 113 selfloop transitions, 104 changer transitions 0/219 dead transitions. [2023-11-17 16:34:56,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 219 transitions, 4364 flow [2023-11-17 16:34:56,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 16:34:56,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 16:34:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 915 transitions. [2023-11-17 16:34:56,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2023-11-17 16:34:56,539 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 915 transitions. [2023-11-17 16:34:56,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 915 transitions. [2023-11-17 16:34:56,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:56,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 915 transitions. [2023-11-17 16:34:56,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.35714285714286) internal successors, (915), 14 states have internal predecessors, (915), 0 states have call successors, (0), 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 16:34:56,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 150.0) internal successors, (2250), 15 states have internal predecessors, (2250), 0 states have call successors, (0), 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 16:34:56,542 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 150.0) internal successors, (2250), 15 states have internal predecessors, (2250), 0 states have call successors, (0), 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 16:34:56,542 INFO L175 Difference]: Start difference. First operand has 172 places, 171 transitions, 3418 flow. Second operand 14 states and 915 transitions. [2023-11-17 16:34:56,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 219 transitions, 4364 flow [2023-11-17 16:34:56,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 219 transitions, 3848 flow, removed 194 selfloop flow, removed 12 redundant places. [2023-11-17 16:34:56,588 INFO L231 Difference]: Finished difference. Result has 178 places, 191 transitions, 3722 flow [2023-11-17 16:34:56,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=2890, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3722, PETRI_PLACES=178, PETRI_TRANSITIONS=191} [2023-11-17 16:34:56,588 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 158 predicate places. [2023-11-17 16:34:56,588 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 191 transitions, 3722 flow [2023-11-17 16:34:56,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.266666666666666) internal successors, (949), 15 states have internal predecessors, (949), 0 states have call successors, (0), 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 16:34:56,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:56,589 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:56,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:56,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:56,793 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:56,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:56,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1029034593, now seen corresponding path program 18 times [2023-11-17 16:34:56,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:56,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622705439] [2023-11-17 16:34:56,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:56,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:56,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:56,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622705439] [2023-11-17 16:34:56,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622705439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:56,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996121640] [2023-11-17 16:34:56,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:34:56,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:56,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:56,840 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:56,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 16:34:56,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 16:34:56,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:56,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:34:56,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:56,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:57,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996121640] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:57,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:57,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-17 16:34:57,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796551129] [2023-11-17 16:34:57,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:57,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:34:57,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:57,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:34:57,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:34:57,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:57,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 191 transitions, 3722 flow. Second operand has 15 states, 15 states have (on average 63.266666666666666) internal successors, (949), 15 states have internal predecessors, (949), 0 states have call successors, (0), 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 16:34:57,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:57,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:57,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:57,242 INFO L124 PetriNetUnfolderBase]: 364/716 cut-off events. [2023-11-17 16:34:57,243 INFO L125 PetriNetUnfolderBase]: For 14058/14058 co-relation queries the response was YES. [2023-11-17 16:34:57,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6393 conditions, 716 events. 364/716 cut-off events. For 14058/14058 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3452 event pairs, 22 based on Foata normal form. 8/723 useless extension candidates. Maximal degree in co-relation 6104. Up to 223 conditions per place. [2023-11-17 16:34:57,248 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 111 selfloop transitions, 117 changer transitions 6/236 dead transitions. [2023-11-17 16:34:57,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 236 transitions, 4739 flow [2023-11-17 16:34:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 16:34:57,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 16:34:57,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 851 transitions. [2023-11-17 16:34:57,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43641025641025644 [2023-11-17 16:34:57,249 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 851 transitions. [2023-11-17 16:34:57,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 851 transitions. [2023-11-17 16:34:57,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:57,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 851 transitions. [2023-11-17 16:34:57,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 65.46153846153847) internal successors, (851), 13 states have internal predecessors, (851), 0 states have call successors, (0), 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 16:34:57,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 150.0) internal successors, (2100), 14 states have internal predecessors, (2100), 0 states have call successors, (0), 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 16:34:57,252 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 150.0) internal successors, (2100), 14 states have internal predecessors, (2100), 0 states have call successors, (0), 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 16:34:57,252 INFO L175 Difference]: Start difference. First operand has 178 places, 191 transitions, 3722 flow. Second operand 13 states and 851 transitions. [2023-11-17 16:34:57,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 236 transitions, 4739 flow [2023-11-17 16:34:57,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 236 transitions, 4623 flow, removed 55 selfloop flow, removed 2 redundant places. [2023-11-17 16:34:57,297 INFO L231 Difference]: Finished difference. Result has 189 places, 206 transitions, 4136 flow [2023-11-17 16:34:57,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=3618, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4136, PETRI_PLACES=189, PETRI_TRANSITIONS=206} [2023-11-17 16:34:57,297 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 169 predicate places. [2023-11-17 16:34:57,298 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 206 transitions, 4136 flow [2023-11-17 16:34:57,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.266666666666666) internal successors, (949), 15 states have internal predecessors, (949), 0 states have call successors, (0), 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 16:34:57,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:57,298 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:57,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:57,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:57,503 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:57,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:57,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1533326577, now seen corresponding path program 19 times [2023-11-17 16:34:57,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:57,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198082506] [2023-11-17 16:34:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:57,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:57,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:57,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198082506] [2023-11-17 16:34:57,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198082506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:57,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009683705] [2023-11-17 16:34:57,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:34:57,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:57,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:57,546 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:57,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 16:34:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:57,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:34:57,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:57,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:57,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009683705] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:57,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:57,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-17 16:34:57,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738147071] [2023-11-17 16:34:57,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:57,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 16:34:57,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:57,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 16:34:57,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-11-17 16:34:57,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:57,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 206 transitions, 4136 flow. Second operand has 16 states, 16 states have (on average 63.25) internal successors, (1012), 16 states have internal predecessors, (1012), 0 states have call successors, (0), 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 16:34:57,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:57,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:57,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:57,972 INFO L124 PetriNetUnfolderBase]: 390/780 cut-off events. [2023-11-17 16:34:57,973 INFO L125 PetriNetUnfolderBase]: For 20180/20180 co-relation queries the response was YES. [2023-11-17 16:34:57,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7628 conditions, 780 events. 390/780 cut-off events. For 20180/20180 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3923 event pairs, 28 based on Foata normal form. 6/785 useless extension candidates. Maximal degree in co-relation 7322. Up to 193 conditions per place. [2023-11-17 16:34:57,983 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 107 selfloop transitions, 142 changer transitions 10/261 dead transitions. [2023-11-17 16:34:57,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 261 transitions, 5608 flow [2023-11-17 16:34:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 16:34:57,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 16:34:57,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 986 transitions. [2023-11-17 16:34:57,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43822222222222224 [2023-11-17 16:34:57,985 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 986 transitions. [2023-11-17 16:34:57,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 986 transitions. [2023-11-17 16:34:57,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:57,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 986 transitions. [2023-11-17 16:34:57,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 65.73333333333333) internal successors, (986), 15 states have internal predecessors, (986), 0 states have call successors, (0), 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 16:34:57,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 150.0) internal successors, (2400), 16 states have internal predecessors, (2400), 0 states have call successors, (0), 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 16:34:57,989 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 150.0) internal successors, (2400), 16 states have internal predecessors, (2400), 0 states have call successors, (0), 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 16:34:57,989 INFO L175 Difference]: Start difference. First operand has 189 places, 206 transitions, 4136 flow. Second operand 15 states and 986 transitions. [2023-11-17 16:34:57,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 261 transitions, 5608 flow [2023-11-17 16:34:58,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 261 transitions, 5459 flow, removed 34 selfloop flow, removed 5 redundant places. [2023-11-17 16:34:58,059 INFO L231 Difference]: Finished difference. Result has 202 places, 220 transitions, 4955 flow [2023-11-17 16:34:58,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=3993, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4955, PETRI_PLACES=202, PETRI_TRANSITIONS=220} [2023-11-17 16:34:58,060 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 182 predicate places. [2023-11-17 16:34:58,060 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 220 transitions, 4955 flow [2023-11-17 16:34:58,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.25) internal successors, (1012), 16 states have internal predecessors, (1012), 0 states have call successors, (0), 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 16:34:58,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:58,061 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:58,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:58,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-17 16:34:58,265 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:58,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:58,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2102818163, now seen corresponding path program 20 times [2023-11-17 16:34:58,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:58,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544206190] [2023-11-17 16:34:58,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:58,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:58,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:58,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544206190] [2023-11-17 16:34:58,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544206190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:58,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014881520] [2023-11-17 16:34:58,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:34:58,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:58,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:58,365 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:58,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 16:34:58,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:34:58,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:58,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 16:34:58,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:58,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:58,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014881520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:58,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:58,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 4] total 18 [2023-11-17 16:34:58,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389205328] [2023-11-17 16:34:58,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:58,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:34:58,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:58,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:34:58,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:34:58,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:58,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 220 transitions, 4955 flow. Second operand has 20 states, 20 states have (on average 63.3) internal successors, (1266), 20 states have internal predecessors, (1266), 0 states have call successors, (0), 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 16:34:58,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:58,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:58,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:58,865 INFO L124 PetriNetUnfolderBase]: 489/976 cut-off events. [2023-11-17 16:34:58,865 INFO L125 PetriNetUnfolderBase]: For 41312/41312 co-relation queries the response was YES. [2023-11-17 16:34:58,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10403 conditions, 976 events. 489/976 cut-off events. For 41312/41312 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5249 event pairs, 40 based on Foata normal form. 38/1013 useless extension candidates. Maximal degree in co-relation 10089. Up to 600 conditions per place. [2023-11-17 16:34:58,874 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 192 selfloop transitions, 84 changer transitions 33/311 dead transitions. [2023-11-17 16:34:58,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 311 transitions, 7205 flow [2023-11-17 16:34:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 16:34:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 16:34:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 881 transitions. [2023-11-17 16:34:58,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4517948717948718 [2023-11-17 16:34:58,876 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 881 transitions. [2023-11-17 16:34:58,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 881 transitions. [2023-11-17 16:34:58,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:58,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 881 transitions. [2023-11-17 16:34:58,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 67.76923076923077) internal successors, (881), 13 states have internal predecessors, (881), 0 states have call successors, (0), 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 16:34:58,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 150.0) internal successors, (2100), 14 states have internal predecessors, (2100), 0 states have call successors, (0), 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 16:34:58,878 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 150.0) internal successors, (2100), 14 states have internal predecessors, (2100), 0 states have call successors, (0), 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 16:34:58,878 INFO L175 Difference]: Start difference. First operand has 202 places, 220 transitions, 4955 flow. Second operand 13 states and 881 transitions. [2023-11-17 16:34:58,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 311 transitions, 7205 flow [2023-11-17 16:34:58,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 311 transitions, 6872 flow, removed 99 selfloop flow, removed 7 redundant places. [2023-11-17 16:34:58,961 INFO L231 Difference]: Finished difference. Result has 213 places, 259 transitions, 5972 flow [2023-11-17 16:34:58,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=4690, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5972, PETRI_PLACES=213, PETRI_TRANSITIONS=259} [2023-11-17 16:34:58,962 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 193 predicate places. [2023-11-17 16:34:58,962 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 259 transitions, 5972 flow [2023-11-17 16:34:58,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 63.3) internal successors, (1266), 20 states have internal predecessors, (1266), 0 states have call successors, (0), 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 16:34:58,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:58,962 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:58,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-17 16:34:59,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-17 16:34:59,163 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:59,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:59,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1960499539, now seen corresponding path program 21 times [2023-11-17 16:34:59,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:59,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497991965] [2023-11-17 16:34:59,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:59,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:59,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:59,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497991965] [2023-11-17 16:34:59,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497991965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:59,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873737781] [2023-11-17 16:34:59,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:34:59,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:59,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:59,270 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:59,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 16:34:59,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:34:59,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:59,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:34:59,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:34:59,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:34:59,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873737781] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:34:59,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:34:59,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2023-11-17 16:34:59,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066237253] [2023-11-17 16:34:59,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:34:59,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:34:59,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:59,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:34:59,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:34:59,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:34:59,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 259 transitions, 5972 flow. Second operand has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 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 16:34:59,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:59,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:34:59,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:59,553 INFO L124 PetriNetUnfolderBase]: 477/952 cut-off events. [2023-11-17 16:34:59,553 INFO L125 PetriNetUnfolderBase]: For 31891/31894 co-relation queries the response was YES. [2023-11-17 16:34:59,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10236 conditions, 952 events. 477/952 cut-off events. For 31891/31894 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5169 event pairs, 20 based on Foata normal form. 13/963 useless extension candidates. Maximal degree in co-relation 9972. Up to 561 conditions per place. [2023-11-17 16:34:59,560 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 24 selfloop transitions, 2 changer transitions 257/285 dead transitions. [2023-11-17 16:34:59,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 285 transitions, 6947 flow [2023-11-17 16:34:59,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:34:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:34:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2023-11-17 16:34:59,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2023-11-17 16:34:59,561 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2023-11-17 16:34:59,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2023-11-17 16:34:59,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:59,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2023-11-17 16:34:59,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:59,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 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 16:34:59,562 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 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 16:34:59,562 INFO L175 Difference]: Start difference. First operand has 213 places, 259 transitions, 5972 flow. Second operand 6 states and 396 transitions. [2023-11-17 16:34:59,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 285 transitions, 6947 flow [2023-11-17 16:34:59,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 285 transitions, 6599 flow, removed 148 selfloop flow, removed 3 redundant places. [2023-11-17 16:34:59,654 INFO L231 Difference]: Finished difference. Result has 214 places, 27 transitions, 394 flow [2023-11-17 16:34:59,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=5645, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=394, PETRI_PLACES=214, PETRI_TRANSITIONS=27} [2023-11-17 16:34:59,654 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 194 predicate places. [2023-11-17 16:34:59,654 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 27 transitions, 394 flow [2023-11-17 16:34:59,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 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 16:34:59,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:59,655 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:59,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:59,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-17 16:34:59,855 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:59,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:59,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1635941957, now seen corresponding path program 22 times [2023-11-17 16:34:59,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:59,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587193773] [2023-11-17 16:34:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:59,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:59,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:59,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587193773] [2023-11-17 16:34:59,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587193773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:59,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117686939] [2023-11-17 16:34:59,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:34:59,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:59,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:59,902 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:59,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 16:34:59,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:34:59,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:59,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:34:59,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:00,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:00,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117686939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:00,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:00,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2023-11-17 16:35:00,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59866005] [2023-11-17 16:35:00,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:00,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:35:00,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:00,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:35:00,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:35:00,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:35:00,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 27 transitions, 394 flow. Second operand has 21 states, 21 states have (on average 63.0) internal successors, (1323), 21 states have internal predecessors, (1323), 0 states have call successors, (0), 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 16:35:00,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:00,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:35:00,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:00,225 INFO L124 PetriNetUnfolderBase]: 44/112 cut-off events. [2023-11-17 16:35:00,225 INFO L125 PetriNetUnfolderBase]: For 2890/2890 co-relation queries the response was YES. [2023-11-17 16:35:00,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 112 events. 44/112 cut-off events. For 2890/2890 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 282 event pairs, 4 based on Foata normal form. 4/116 useless extension candidates. Maximal degree in co-relation 1014. Up to 36 conditions per place. [2023-11-17 16:35:00,226 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 31 selfloop transitions, 6 changer transitions 15/54 dead transitions. [2023-11-17 16:35:00,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 54 transitions, 707 flow [2023-11-17 16:35:00,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:35:00,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:35:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 720 transitions. [2023-11-17 16:35:00,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2023-11-17 16:35:00,227 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 720 transitions. [2023-11-17 16:35:00,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 720 transitions. [2023-11-17 16:35:00,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:00,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 720 transitions. [2023-11-17 16:35:00,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 65.45454545454545) internal successors, (720), 11 states have internal predecessors, (720), 0 states have call successors, (0), 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 16:35:00,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 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 16:35:00,229 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 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 16:35:00,229 INFO L175 Difference]: Start difference. First operand has 214 places, 27 transitions, 394 flow. Second operand 11 states and 720 transitions. [2023-11-17 16:35:00,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 54 transitions, 707 flow [2023-11-17 16:35:00,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 54 transitions, 349 flow, removed 92 selfloop flow, removed 70 redundant places. [2023-11-17 16:35:00,233 INFO L231 Difference]: Finished difference. Result has 85 places, 23 transitions, 120 flow [2023-11-17 16:35:00,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=120, PETRI_PLACES=85, PETRI_TRANSITIONS=23} [2023-11-17 16:35:00,233 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 65 predicate places. [2023-11-17 16:35:00,233 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 23 transitions, 120 flow [2023-11-17 16:35:00,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.0) internal successors, (1323), 21 states have internal predecessors, (1323), 0 states have call successors, (0), 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 16:35:00,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:00,234 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:00,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:00,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:00,438 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:00,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:00,439 INFO L85 PathProgramCache]: Analyzing trace with hash 914602225, now seen corresponding path program 23 times [2023-11-17 16:35:00,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:00,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139725052] [2023-11-17 16:35:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:00,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:00,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:00,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139725052] [2023-11-17 16:35:00,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139725052] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:00,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915279377] [2023-11-17 16:35:00,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:35:00,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:00,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:00,551 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:00,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 16:35:00,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 16:35:00,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:00,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:35:00,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:00,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:00,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915279377] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:00,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:00,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 5] total 23 [2023-11-17 16:35:00,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049221709] [2023-11-17 16:35:00,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:00,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:35:00,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:00,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:35:00,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:35:00,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:35:00,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 23 transitions, 120 flow. Second operand has 25 states, 25 states have (on average 63.2) internal successors, (1580), 25 states have internal predecessors, (1580), 0 states have call successors, (0), 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 16:35:00,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:00,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:35:00,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:00,969 INFO L124 PetriNetUnfolderBase]: 55/135 cut-off events. [2023-11-17 16:35:00,970 INFO L125 PetriNetUnfolderBase]: For 320/320 co-relation queries the response was YES. [2023-11-17 16:35:00,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 135 events. 55/135 cut-off events. For 320/320 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 345 event pairs, 8 based on Foata normal form. 1/136 useless extension candidates. Maximal degree in co-relation 694. Up to 27 conditions per place. [2023-11-17 16:35:00,970 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 36 selfloop transitions, 16 changer transitions 15/69 dead transitions. [2023-11-17 16:35:00,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 69 transitions, 459 flow [2023-11-17 16:35:00,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:35:00,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:35:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1044 transitions. [2023-11-17 16:35:00,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435 [2023-11-17 16:35:00,971 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1044 transitions. [2023-11-17 16:35:00,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1044 transitions. [2023-11-17 16:35:00,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:00,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1044 transitions. [2023-11-17 16:35:00,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.25) internal successors, (1044), 16 states have internal predecessors, (1044), 0 states have call successors, (0), 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 16:35:00,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 150.0) internal successors, (2550), 17 states have internal predecessors, (2550), 0 states have call successors, (0), 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 16:35:00,974 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 150.0) internal successors, (2550), 17 states have internal predecessors, (2550), 0 states have call successors, (0), 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 16:35:00,974 INFO L175 Difference]: Start difference. First operand has 85 places, 23 transitions, 120 flow. Second operand 16 states and 1044 transitions. [2023-11-17 16:35:00,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 69 transitions, 459 flow [2023-11-17 16:35:00,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 69 transitions, 434 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-11-17 16:35:00,976 INFO L231 Difference]: Finished difference. Result has 89 places, 30 transitions, 191 flow [2023-11-17 16:35:00,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=191, PETRI_PLACES=89, PETRI_TRANSITIONS=30} [2023-11-17 16:35:00,976 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 69 predicate places. [2023-11-17 16:35:00,976 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 30 transitions, 191 flow [2023-11-17 16:35:00,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 63.2) internal successors, (1580), 25 states have internal predecessors, (1580), 0 states have call successors, (0), 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 16:35:00,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:00,976 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:00,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:01,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 16:35:01,181 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:01,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:01,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1573498931, now seen corresponding path program 24 times [2023-11-17 16:35:01,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:01,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801425410] [2023-11-17 16:35:01,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:01,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:01,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:01,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801425410] [2023-11-17 16:35:01,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801425410] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:01,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757022491] [2023-11-17 16:35:01,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:35:01,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:01,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:01,235 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:01,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 16:35:01,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:35:01,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:01,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:35:01,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-17 16:35:01,331 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:35:01,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757022491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:35:01,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:35:01,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-17 16:35:01,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680775482] [2023-11-17 16:35:01,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:35:01,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:35:01,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:01,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:35:01,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:35:01,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:35:01,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 30 transitions, 191 flow. Second operand has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 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 16:35:01,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:01,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:35:01,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:01,363 INFO L124 PetriNetUnfolderBase]: 47/137 cut-off events. [2023-11-17 16:35:01,364 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2023-11-17 16:35:01,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 137 events. 47/137 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 413 event pairs, 0 based on Foata normal form. 1/138 useless extension candidates. Maximal degree in co-relation 664. Up to 39 conditions per place. [2023-11-17 16:35:01,364 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 29 selfloop transitions, 4 changer transitions 5/40 dead transitions. [2023-11-17 16:35:01,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 40 transitions, 308 flow [2023-11-17 16:35:01,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:35:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:35:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 392 transitions. [2023-11-17 16:35:01,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43555555555555553 [2023-11-17 16:35:01,365 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 392 transitions. [2023-11-17 16:35:01,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 392 transitions. [2023-11-17 16:35:01,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:01,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 392 transitions. [2023-11-17 16:35:01,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.33333333333333) internal successors, (392), 6 states have internal predecessors, (392), 0 states have call successors, (0), 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 16:35:01,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 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 16:35:01,366 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 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 16:35:01,367 INFO L175 Difference]: Start difference. First operand has 89 places, 30 transitions, 191 flow. Second operand 6 states and 392 transitions. [2023-11-17 16:35:01,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 40 transitions, 308 flow [2023-11-17 16:35:01,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 40 transitions, 270 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-11-17 16:35:01,368 INFO L231 Difference]: Finished difference. Result has 87 places, 30 transitions, 166 flow [2023-11-17 16:35:01,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=87, PETRI_TRANSITIONS=30} [2023-11-17 16:35:01,368 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 67 predicate places. [2023-11-17 16:35:01,368 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 30 transitions, 166 flow [2023-11-17 16:35:01,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 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 16:35:01,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:01,368 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:01,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:01,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 16:35:01,573 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:01,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:01,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1545793301, now seen corresponding path program 25 times [2023-11-17 16:35:01,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:01,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109216772] [2023-11-17 16:35:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:01,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:01,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:01,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109216772] [2023-11-17 16:35:01,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109216772] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:01,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492556262] [2023-11-17 16:35:01,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:35:01,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:01,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:01,629 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:01,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 16:35:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:01,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 16:35:01,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:01,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:01,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492556262] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:01,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:01,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 25 [2023-11-17 16:35:01,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589342324] [2023-11-17 16:35:01,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:01,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:35:01,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:01,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:35:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:35:01,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:35:01,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 30 transitions, 166 flow. Second operand has 26 states, 26 states have (on average 62.84615384615385) internal successors, (1634), 26 states have internal predecessors, (1634), 0 states have call successors, (0), 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 16:35:01,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:01,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:35:01,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:02,003 INFO L124 PetriNetUnfolderBase]: 43/127 cut-off events. [2023-11-17 16:35:02,004 INFO L125 PetriNetUnfolderBase]: For 239/239 co-relation queries the response was YES. [2023-11-17 16:35:02,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 127 events. 43/127 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 360 event pairs, 0 based on Foata normal form. 4/131 useless extension candidates. Maximal degree in co-relation 550. Up to 44 conditions per place. [2023-11-17 16:35:02,004 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 32 selfloop transitions, 7 changer transitions 24/65 dead transitions. [2023-11-17 16:35:02,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 65 transitions, 451 flow [2023-11-17 16:35:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 16:35:02,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 16:35:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 913 transitions. [2023-11-17 16:35:02,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43476190476190474 [2023-11-17 16:35:02,005 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 913 transitions. [2023-11-17 16:35:02,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 913 transitions. [2023-11-17 16:35:02,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:02,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 913 transitions. [2023-11-17 16:35:02,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.21428571428571) internal successors, (913), 14 states have internal predecessors, (913), 0 states have call successors, (0), 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 16:35:02,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 150.0) internal successors, (2250), 15 states have internal predecessors, (2250), 0 states have call successors, (0), 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 16:35:02,008 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 150.0) internal successors, (2250), 15 states have internal predecessors, (2250), 0 states have call successors, (0), 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 16:35:02,008 INFO L175 Difference]: Start difference. First operand has 87 places, 30 transitions, 166 flow. Second operand 14 states and 913 transitions. [2023-11-17 16:35:02,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 65 transitions, 451 flow [2023-11-17 16:35:02,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 65 transitions, 440 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-17 16:35:02,009 INFO L231 Difference]: Finished difference. Result has 97 places, 25 transitions, 143 flow [2023-11-17 16:35:02,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=143, PETRI_PLACES=97, PETRI_TRANSITIONS=25} [2023-11-17 16:35:02,010 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-11-17 16:35:02,010 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 25 transitions, 143 flow [2023-11-17 16:35:02,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.84615384615385) internal successors, (1634), 26 states have internal predecessors, (1634), 0 states have call successors, (0), 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 16:35:02,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:02,010 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:02,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:02,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:02,215 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:02,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:02,215 INFO L85 PathProgramCache]: Analyzing trace with hash -155725149, now seen corresponding path program 26 times [2023-11-17 16:35:02,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:02,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883706042] [2023-11-17 16:35:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:02,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:02,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:02,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883706042] [2023-11-17 16:35:02,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883706042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:02,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572046683] [2023-11-17 16:35:02,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:35:02,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:02,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:02,331 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:02,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 16:35:02,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:35:02,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:02,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:35:02,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:02,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:02,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572046683] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:02,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:02,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 6] total 28 [2023-11-17 16:35:02,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626035696] [2023-11-17 16:35:02,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:02,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 16:35:02,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:02,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 16:35:02,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2023-11-17 16:35:02,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:35:02,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 25 transitions, 143 flow. Second operand has 30 states, 30 states have (on average 62.93333333333333) internal successors, (1888), 30 states have internal predecessors, (1888), 0 states have call successors, (0), 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 16:35:02,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:02,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:35:02,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:02,887 INFO L124 PetriNetUnfolderBase]: 50/146 cut-off events. [2023-11-17 16:35:02,887 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2023-11-17 16:35:02,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 146 events. 50/146 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 427 event pairs, 0 based on Foata normal form. 1/147 useless extension candidates. Maximal degree in co-relation 683. Up to 29 conditions per place. [2023-11-17 16:35:02,888 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 41 selfloop transitions, 19 changer transitions 21/83 dead transitions. [2023-11-17 16:35:02,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 83 transitions, 600 flow [2023-11-17 16:35:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 16:35:02,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 16:35:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1241 transitions. [2023-11-17 16:35:02,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43543859649122807 [2023-11-17 16:35:02,890 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1241 transitions. [2023-11-17 16:35:02,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1241 transitions. [2023-11-17 16:35:02,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:02,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1241 transitions. [2023-11-17 16:35:02,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.3157894736842) internal successors, (1241), 19 states have internal predecessors, (1241), 0 states have call successors, (0), 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 16:35:02,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 0 states have call successors, (0), 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 16:35:02,893 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 0 states have call successors, (0), 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 16:35:02,893 INFO L175 Difference]: Start difference. First operand has 97 places, 25 transitions, 143 flow. Second operand 19 states and 1241 transitions. [2023-11-17 16:35:02,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 83 transitions, 600 flow [2023-11-17 16:35:02,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 83 transitions, 555 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-11-17 16:35:02,895 INFO L231 Difference]: Finished difference. Result has 99 places, 33 transitions, 225 flow [2023-11-17 16:35:02,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=225, PETRI_PLACES=99, PETRI_TRANSITIONS=33} [2023-11-17 16:35:02,895 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 79 predicate places. [2023-11-17 16:35:02,895 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 33 transitions, 225 flow [2023-11-17 16:35:02,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 62.93333333333333) internal successors, (1888), 30 states have internal predecessors, (1888), 0 states have call successors, (0), 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 16:35:02,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:02,896 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:02,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:03,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:03,096 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:03,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:03,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1832551805, now seen corresponding path program 27 times [2023-11-17 16:35:03,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:03,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528762552] [2023-11-17 16:35:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:03,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:03,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:03,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528762552] [2023-11-17 16:35:03,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528762552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:03,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885664775] [2023-11-17 16:35:03,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:35:03,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:03,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:03,180 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:03,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 16:35:03,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:35:03,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:03,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:35:03,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-17 16:35:03,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:35:03,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885664775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:35:03,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:35:03,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-11-17 16:35:03,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773158837] [2023-11-17 16:35:03,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:35:03,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:35:03,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:03,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:35:03,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:35:03,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 150 [2023-11-17 16:35:03,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 33 transitions, 225 flow. Second operand has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 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 16:35:03,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:03,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 150 [2023-11-17 16:35:03,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:03,315 INFO L124 PetriNetUnfolderBase]: 48/143 cut-off events. [2023-11-17 16:35:03,315 INFO L125 PetriNetUnfolderBase]: For 166/166 co-relation queries the response was YES. [2023-11-17 16:35:03,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 693 conditions, 143 events. 48/143 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 426 event pairs, 0 based on Foata normal form. 1/144 useless extension candidates. Maximal degree in co-relation 658. Up to 72 conditions per place. [2023-11-17 16:35:03,316 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 0 selfloop transitions, 0 changer transitions 41/41 dead transitions. [2023-11-17 16:35:03,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 41 transitions, 330 flow [2023-11-17 16:35:03,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:35:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:35:03,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 390 transitions. [2023-11-17 16:35:03,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-17 16:35:03,317 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 390 transitions. [2023-11-17 16:35:03,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 390 transitions. [2023-11-17 16:35:03,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:03,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 390 transitions. [2023-11-17 16:35:03,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.0) internal successors, (390), 6 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 16:35:03,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 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 16:35:03,319 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 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 16:35:03,319 INFO L175 Difference]: Start difference. First operand has 99 places, 33 transitions, 225 flow. Second operand 6 states and 390 transitions. [2023-11-17 16:35:03,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 41 transitions, 330 flow [2023-11-17 16:35:03,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 41 transitions, 282 flow, removed 7 selfloop flow, removed 12 redundant places. [2023-11-17 16:35:03,320 INFO L231 Difference]: Finished difference. Result has 91 places, 0 transitions, 0 flow [2023-11-17 16:35:03,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=91, PETRI_TRANSITIONS=0} [2023-11-17 16:35:03,321 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2023-11-17 16:35:03,321 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 0 transitions, 0 flow [2023-11-17 16:35:03,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 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 16:35:03,324 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 16:35:03,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 16:35:03,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 16:35:03,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:03,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:03,530 INFO L445 BasicCegarLoop]: Path program histogram: [27, 2, 2, 1] [2023-11-17 16:35:03,532 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:35:03,532 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:35:03,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:35:03 BasicIcfg [2023-11-17 16:35:03,541 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:35:03,541 INFO L158 Benchmark]: Toolchain (without parser) took 20901.32ms. Allocated memory was 295.7MB in the beginning and 449.8MB in the end (delta: 154.1MB). Free memory was 243.5MB in the beginning and 333.9MB in the end (delta: -90.4MB). Peak memory consumption was 64.5MB. Max. memory is 8.0GB. [2023-11-17 16:35:03,541 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 139.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:35:03,541 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.84ms. Allocated memory is still 295.7MB. Free memory was 243.2MB in the beginning and 232.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-11-17 16:35:03,541 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.72ms. Allocated memory is still 295.7MB. Free memory was 232.5MB in the beginning and 230.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:35:03,542 INFO L158 Benchmark]: Boogie Preprocessor took 29.10ms. Allocated memory is still 295.7MB. Free memory was 230.9MB in the beginning and 229.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 16:35:03,542 INFO L158 Benchmark]: RCFGBuilder took 331.61ms. Allocated memory is still 295.7MB. Free memory was 229.6MB in the beginning and 217.6MB in the end (delta: 12.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 16:35:03,542 INFO L158 Benchmark]: TraceAbstraction took 20347.84ms. Allocated memory was 295.7MB in the beginning and 449.8MB in the end (delta: 154.1MB). Free memory was 216.8MB in the beginning and 333.9MB in the end (delta: -117.1MB). Peak memory consumption was 38.3MB. Max. memory is 8.0GB. [2023-11-17 16:35:03,543 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 139.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 162.84ms. Allocated memory is still 295.7MB. Free memory was 243.2MB in the beginning and 232.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.72ms. Allocated memory is still 295.7MB. Free memory was 232.5MB in the beginning and 230.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.10ms. Allocated memory is still 295.7MB. Free memory was 230.9MB in the beginning and 229.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 331.61ms. Allocated memory is still 295.7MB. Free memory was 229.6MB in the beginning and 217.6MB in the end (delta: 12.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 20347.84ms. Allocated memory was 295.7MB in the beginning and 449.8MB in the end (delta: 154.1MB). Free memory was 216.8MB in the beginning and 333.9MB in the end (delta: -117.1MB). Peak memory consumption was 38.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 74 PlacesBefore, 20 PlacesAfterwards, 73 TransitionsBefore, 15 TransitionsAfterwards, 432 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 66 TotalNumberOfCompositions, 458 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 458, independent: 458, independent conditional: 0, independent unconditional: 458, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 291, independent: 291, independent conditional: 0, independent unconditional: 291, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 291, independent: 291, independent conditional: 0, independent unconditional: 291, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 458, independent: 167, independent conditional: 0, independent unconditional: 167, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 291, unknown conditional: 0, unknown unconditional: 291] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 70]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 97 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 20.2s, OverallIterations: 32, TraceHistogramMax: 6, PathProgramHistogramMax: 27, EmptinessCheckTime: 0.0s, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1569 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1569 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 239 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4844 IncrementalHoareTripleChecker+Invalid, 5083 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 239 mSolverCounterUnsat, 0 mSDtfsCounter, 4844 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1151 GetRequests, 677 SyntacticMatches, 17 SemanticMatches, 457 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2506 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5972occurred in iteration=25, InterpolantAutomatonStates: 309, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 1059 NumberOfCodeBlocks, 1046 NumberOfCodeBlocksAsserted, 95 NumberOfCheckSat, 1365 ConstructedInterpolants, 0 QuantifiedInterpolants, 6183 SizeOfPredicates, 3 NumberOfNonLiveVariables, 3344 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 82 InterpolantComputations, 11 PerfectInterpolantSequences, 355/779 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-17 16:35:03,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...