/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:13:56,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:13:56,184 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 16:13:56,225 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:13:56,226 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:13:56,227 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:13:56,227 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:13:56,227 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:13:56,228 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:13:56,231 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:13:56,232 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:13:56,233 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:13:56,233 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:13:56,234 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:13:56,234 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:13:56,234 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:13:56,234 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:13:56,235 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:13:56,235 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:13:56,235 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:13:56,235 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:13:56,236 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:13:56,236 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:13:56,236 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:13:56,237 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:13:56,237 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:13:56,237 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:13:56,237 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:13:56,237 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:13:56,237 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:13:56,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:13:56,239 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:13:56,239 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:13:56,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:13:56,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:13:56,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:13:56,496 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:13:56,497 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:13:56,497 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-11-17 16:13:57,660 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:13:57,838 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:13:57,839 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-11-17 16:13:57,846 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/295c72555/d0716e075ed346d08a6c6a9cfd0a19a6/FLAG8edb4021a [2023-11-17 16:13:57,864 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/295c72555/d0716e075ed346d08a6c6a9cfd0a19a6 [2023-11-17 16:13:57,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:13:57,869 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:13:57,873 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:13:57,873 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:13:57,878 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:13:57,878 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:13:57" (1/1) ... [2023-11-17 16:13:57,879 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b63d1ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:57, skipping insertion in model container [2023-11-17 16:13:57,879 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:13:57" (1/1) ... [2023-11-17 16:13:57,905 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:13:58,060 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c[2017,2030] [2023-11-17 16:13:58,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:13:58,074 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:13:58,091 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c[2017,2030] [2023-11-17 16:13:58,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:13:58,103 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:13:58,104 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:13:58,110 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:13:58,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:58 WrapperNode [2023-11-17 16:13:58,111 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:13:58,112 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:13:58,112 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:13:58,112 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:13:58,118 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:58" (1/1) ... [2023-11-17 16:13:58,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:58" (1/1) ... [2023-11-17 16:13:58,141 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2023-11-17 16:13:58,142 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:13:58,142 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:13:58,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:13:58,143 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:13:58,153 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:58" (1/1) ... [2023-11-17 16:13:58,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:58" (1/1) ... [2023-11-17 16:13:58,156 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:58" (1/1) ... [2023-11-17 16:13:58,156 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:58" (1/1) ... [2023-11-17 16:13:58,159 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:58" (1/1) ... [2023-11-17 16:13:58,162 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:58" (1/1) ... [2023-11-17 16:13:58,163 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:58" (1/1) ... [2023-11-17 16:13:58,163 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:58" (1/1) ... [2023-11-17 16:13:58,165 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:13:58,166 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:13:58,166 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:13:58,166 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:13:58,167 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:58" (1/1) ... [2023-11-17 16:13:58,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:13:58,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:58,199 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 16:13:58,201 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 16:13:58,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:13:58,219 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:13:58,219 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:13:58,219 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:13:58,219 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:13:58,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:13:58,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:13:58,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:13:58,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:13:58,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:13:58,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:13:58,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:13:58,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:13:58,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:13:58,222 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 16:13:58,303 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:13:58,305 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:13:58,448 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:13:58,489 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:13:58,490 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 16:13:58,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:13:58 BoogieIcfgContainer [2023-11-17 16:13:58,491 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:13:58,494 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:13:58,494 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:13:58,496 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:13:58,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:13:57" (1/3) ... [2023-11-17 16:13:58,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b63055b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:13:58, skipping insertion in model container [2023-11-17 16:13:58,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:58" (2/3) ... [2023-11-17 16:13:58,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b63055b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:13:58, skipping insertion in model container [2023-11-17 16:13:58,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:13:58" (3/3) ... [2023-11-17 16:13:58,499 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-11-17 16:13:58,514 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:13:58,515 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:13:58,515 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:13:58,569 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:13:58,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 78 transitions, 170 flow [2023-11-17 16:13:58,639 INFO L124 PetriNetUnfolderBase]: 5/76 cut-off events. [2023-11-17 16:13:58,639 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:13:58,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 76 events. 5/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-11-17 16:13:58,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 78 transitions, 170 flow [2023-11-17 16:13:58,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 67 transitions, 146 flow [2023-11-17 16:13:58,662 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:13:58,680 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 67 transitions, 146 flow [2023-11-17 16:13:58,688 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 67 transitions, 146 flow [2023-11-17 16:13:58,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 67 transitions, 146 flow [2023-11-17 16:13:58,728 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2023-11-17 16:13:58,728 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:13:58,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 67 events. 5/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-11-17 16:13:58,731 INFO L119 LiptonReduction]: Number of co-enabled transitions 648 [2023-11-17 16:14:00,341 INFO L134 LiptonReduction]: Checked pairs total: 607 [2023-11-17 16:14:00,341 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-11-17 16:14:00,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:14:00,361 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;@756c566a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:14:00,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 16:14:00,365 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:14:00,365 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 16:14:00,365 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:14:00,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:00,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:00,367 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 16:14:00,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:00,371 INFO L85 PathProgramCache]: Analyzing trace with hash 609914881, now seen corresponding path program 1 times [2023-11-17 16:14:00,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:00,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687243358] [2023-11-17 16:14:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:00,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:00,610 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 16:14:00,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:00,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687243358] [2023-11-17 16:14:00,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687243358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:14:00,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:14:00,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:14:00,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594234001] [2023-11-17 16:14:00,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:14:00,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:14:00,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:00,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:14:00,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:14:00,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 136 [2023-11-17 16:14:00,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:00,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:00,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 136 [2023-11-17 16:14:00,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:00,728 INFO L124 PetriNetUnfolderBase]: 60/116 cut-off events. [2023-11-17 16:14:00,728 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-17 16:14:00,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 116 events. 60/116 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 304 event pairs, 24 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 188. Up to 61 conditions per place. [2023-11-17 16:14:00,730 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 19 selfloop transitions, 2 changer transitions 4/25 dead transitions. [2023-11-17 16:14:00,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 121 flow [2023-11-17 16:14:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:14:00,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:14:00,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-11-17 16:14:00,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5514705882352942 [2023-11-17 16:14:00,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-11-17 16:14:00,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-11-17 16:14:00,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:00,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-11-17 16:14:00,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:00,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:00,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:00,753 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 225 transitions. [2023-11-17 16:14:00,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 121 flow [2023-11-17 16:14:00,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:14:00,757 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-11-17 16:14:00,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, 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=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-11-17 16:14:00,761 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-17 16:14:00,762 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-11-17 16:14:00,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:00,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:00,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:00,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:14:00,763 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 16:14:00,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:00,763 INFO L85 PathProgramCache]: Analyzing trace with hash -25353225, now seen corresponding path program 1 times [2023-11-17 16:14:00,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:00,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102518122] [2023-11-17 16:14:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:00,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:00,898 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 16:14:00,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:00,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102518122] [2023-11-17 16:14:00,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102518122] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:14:00,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:14:00,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:14:00,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789020546] [2023-11-17 16:14:00,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:14:00,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:14:00,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:00,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:14:00,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:14:00,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:00,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:00,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:00,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:00,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:00,991 INFO L124 PetriNetUnfolderBase]: 66/126 cut-off events. [2023-11-17 16:14:00,991 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-17 16:14:00,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 66/126 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 346 event pairs, 37 based on Foata normal form. 2/128 useless extension candidates. Maximal degree in co-relation 130. Up to 106 conditions per place. [2023-11-17 16:14:00,993 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 19 selfloop transitions, 4 changer transitions 5/28 dead transitions. [2023-11-17 16:14:00,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 132 flow [2023-11-17 16:14:00,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:14:00,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:14:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 299 transitions. [2023-11-17 16:14:01,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43970588235294117 [2023-11-17 16:14:01,000 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 299 transitions. [2023-11-17 16:14:01,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 299 transitions. [2023-11-17 16:14:01,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:01,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 299 transitions. [2023-11-17 16:14:01,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 59.8) internal successors, (299), 5 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,007 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,007 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 299 transitions. [2023-11-17 16:14:01,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 132 flow [2023-11-17 16:14:01,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:14:01,010 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 75 flow [2023-11-17 16:14:01,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-11-17 16:14:01,011 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-11-17 16:14:01,011 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 75 flow [2023-11-17 16:14:01,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:01,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:01,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:14:01,013 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 16:14:01,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:01,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1592540017, now seen corresponding path program 2 times [2023-11-17 16:14:01,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:01,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649997920] [2023-11-17 16:14:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:01,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:01,155 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 16:14:01,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:01,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649997920] [2023-11-17 16:14:01,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649997920] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:01,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542836732] [2023-11-17 16:14:01,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:14:01,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:01,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:01,165 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 16:14:01,171 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 16:14:01,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:14:01,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:01,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:14:01,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:01,314 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 16:14:01,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:01,343 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 16:14:01,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542836732] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:01,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:01,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 16:14:01,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034000679] [2023-11-17 16:14:01,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:01,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:14:01,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:01,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:14:01,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:14:01,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:01,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 75 flow. Second operand has 8 states, 8 states have (on average 56.75) internal successors, (454), 8 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:01,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:01,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:01,460 INFO L124 PetriNetUnfolderBase]: 56/105 cut-off events. [2023-11-17 16:14:01,460 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-17 16:14:01,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 105 events. 56/105 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 271 event pairs, 2 based on Foata normal form. 6/111 useless extension candidates. Maximal degree in co-relation 197. Up to 34 conditions per place. [2023-11-17 16:14:01,461 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 32 selfloop transitions, 9 changer transitions 0/41 dead transitions. [2023-11-17 16:14:01,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 41 transitions, 231 flow [2023-11-17 16:14:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:14:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:14:01,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 420 transitions. [2023-11-17 16:14:01,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2023-11-17 16:14:01,464 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 420 transitions. [2023-11-17 16:14:01,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 420 transitions. [2023-11-17 16:14:01,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:01,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 420 transitions. [2023-11-17 16:14:01,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.0) internal successors, (420), 7 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,467 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,468 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 75 flow. Second operand 7 states and 420 transitions. [2023-11-17 16:14:01,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 41 transitions, 231 flow [2023-11-17 16:14:01,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 41 transitions, 215 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-17 16:14:01,470 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 117 flow [2023-11-17 16:14:01,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=117, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-17 16:14:01,471 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2023-11-17 16:14:01,471 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 117 flow [2023-11-17 16:14:01,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 56.75) internal successors, (454), 8 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:01,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:01,485 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 16:14:01,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:01,679 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 16:14:01,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:01,679 INFO L85 PathProgramCache]: Analyzing trace with hash 320550285, now seen corresponding path program 3 times [2023-11-17 16:14:01,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:01,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704791378] [2023-11-17 16:14:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:01,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:01,798 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 16:14:01,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:01,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704791378] [2023-11-17 16:14:01,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704791378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:14:01,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:14:01,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:14:01,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856504473] [2023-11-17 16:14:01,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:14:01,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:14:01,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:01,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:14:01,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:14:01,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:01,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:01,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:01,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:01,894 INFO L124 PetriNetUnfolderBase]: 71/136 cut-off events. [2023-11-17 16:14:01,895 INFO L125 PetriNetUnfolderBase]: For 224/224 co-relation queries the response was YES. [2023-11-17 16:14:01,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 136 events. 71/136 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 368 event pairs, 17 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 221. Up to 75 conditions per place. [2023-11-17 16:14:01,900 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 32 selfloop transitions, 8 changer transitions 2/42 dead transitions. [2023-11-17 16:14:01,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 284 flow [2023-11-17 16:14:01,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:14:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:14:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 303 transitions. [2023-11-17 16:14:01,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4455882352941177 [2023-11-17 16:14:01,902 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 303 transitions. [2023-11-17 16:14:01,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 303 transitions. [2023-11-17 16:14:01,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:01,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 303 transitions. [2023-11-17 16:14:01,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,905 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,905 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 117 flow. Second operand 5 states and 303 transitions. [2023-11-17 16:14:01,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 284 flow [2023-11-17 16:14:01,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 42 transitions, 248 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-11-17 16:14:01,912 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 142 flow [2023-11-17 16:14:01,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-11-17 16:14:01,913 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2023-11-17 16:14:01,913 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 142 flow [2023-11-17 16:14:01,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:01,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:01,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:14:01,914 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 16:14:01,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:01,915 INFO L85 PathProgramCache]: Analyzing trace with hash 713779317, now seen corresponding path program 4 times [2023-11-17 16:14:01,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:01,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102063928] [2023-11-17 16:14:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:01,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:02,026 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 16:14:02,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102063928] [2023-11-17 16:14:02,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102063928] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:02,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173236815] [2023-11-17 16:14:02,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:14:02,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:02,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:02,037 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 16:14:02,045 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 16:14:02,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:14:02,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:02,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:14:02,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:02,148 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 16:14:02,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:02,183 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 16:14:02,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173236815] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:02,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:02,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 16:14:02,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105817756] [2023-11-17 16:14:02,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:02,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:14:02,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:02,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:14:02,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:14:02,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:02,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 142 flow. Second operand has 10 states, 10 states have (on average 57.0) internal successors, (570), 10 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:02,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:02,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:02,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:02,312 INFO L124 PetriNetUnfolderBase]: 86/161 cut-off events. [2023-11-17 16:14:02,312 INFO L125 PetriNetUnfolderBase]: For 493/493 co-relation queries the response was YES. [2023-11-17 16:14:02,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 161 events. 86/161 cut-off events. For 493/493 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 485 event pairs, 14 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 235. Up to 82 conditions per place. [2023-11-17 16:14:02,314 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 40 selfloop transitions, 15 changer transitions 0/55 dead transitions. [2023-11-17 16:14:02,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 403 flow [2023-11-17 16:14:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:14:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:14:02,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 591 transitions. [2023-11-17 16:14:02,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4345588235294118 [2023-11-17 16:14:02,316 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 591 transitions. [2023-11-17 16:14:02,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 591 transitions. [2023-11-17 16:14:02,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:02,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 591 transitions. [2023-11-17 16:14:02,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.1) internal successors, (591), 10 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:02,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:02,321 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:02,321 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 142 flow. Second operand 10 states and 591 transitions. [2023-11-17 16:14:02,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 403 flow [2023-11-17 16:14:02,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 55 transitions, 365 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-11-17 16:14:02,324 INFO L231 Difference]: Finished difference. Result has 44 places, 32 transitions, 220 flow [2023-11-17 16:14:02,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=220, PETRI_PLACES=44, PETRI_TRANSITIONS=32} [2023-11-17 16:14:02,325 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2023-11-17 16:14:02,325 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 32 transitions, 220 flow [2023-11-17 16:14:02,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.0) internal successors, (570), 10 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:02,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:02,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:02,335 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 16:14:02,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:02,532 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 16:14:02,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:02,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1687016819, now seen corresponding path program 5 times [2023-11-17 16:14:02,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:02,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729689517] [2023-11-17 16:14:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:02,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:02,596 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 16:14:02,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:02,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729689517] [2023-11-17 16:14:02,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729689517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:02,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842476688] [2023-11-17 16:14:02,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:14:02,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:02,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:02,598 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 16:14:02,599 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 16:14:02,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:14:02,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:02,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:14:02,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:02,701 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 16:14:02,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:02,726 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 16:14:02,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842476688] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:02,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:02,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 16:14:02,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873866232] [2023-11-17 16:14:02,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:02,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:14:02,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:02,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:14:02,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:14:02,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:02,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 32 transitions, 220 flow. Second operand has 10 states, 10 states have (on average 56.5) internal successors, (565), 10 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:02,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:02,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:02,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:02,827 INFO L124 PetriNetUnfolderBase]: 80/155 cut-off events. [2023-11-17 16:14:02,828 INFO L125 PetriNetUnfolderBase]: For 539/539 co-relation queries the response was YES. [2023-11-17 16:14:02,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 155 events. 80/155 cut-off events. For 539/539 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 448 event pairs, 21 based on Foata normal form. 6/161 useless extension candidates. Maximal degree in co-relation 573. Up to 105 conditions per place. [2023-11-17 16:14:02,830 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 30 selfloop transitions, 16 changer transitions 1/47 dead transitions. [2023-11-17 16:14:02,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 393 flow [2023-11-17 16:14:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:14:02,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:14:02,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2023-11-17 16:14:02,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2023-11-17 16:14:02,832 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2023-11-17 16:14:02,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2023-11-17 16:14:02,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:02,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2023-11-17 16:14:02,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:02,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:02,835 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:02,835 INFO L175 Difference]: Start difference. First operand has 44 places, 32 transitions, 220 flow. Second operand 6 states and 360 transitions. [2023-11-17 16:14:02,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 393 flow [2023-11-17 16:14:02,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 347 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-17 16:14:02,840 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 262 flow [2023-11-17 16:14:02,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-11-17 16:14:02,842 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 27 predicate places. [2023-11-17 16:14:02,842 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 262 flow [2023-11-17 16:14:02,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.5) internal successors, (565), 10 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:02,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:02,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:02,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 16:14:03,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:03,050 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 16:14:03,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:03,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1644445039, now seen corresponding path program 6 times [2023-11-17 16:14:03,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:03,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575387015] [2023-11-17 16:14:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:03,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:03,127 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 16:14:03,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:03,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575387015] [2023-11-17 16:14:03,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575387015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:14:03,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:14:03,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:14:03,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019387988] [2023-11-17 16:14:03,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:14:03,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:14:03,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:03,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:14:03,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:14:03,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:03,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:03,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:03,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:03,190 INFO L124 PetriNetUnfolderBase]: 75/140 cut-off events. [2023-11-17 16:14:03,190 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2023-11-17 16:14:03,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 140 events. 75/140 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 368 event pairs, 17 based on Foata normal form. 2/142 useless extension candidates. Maximal degree in co-relation 523. Up to 87 conditions per place. [2023-11-17 16:14:03,192 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 26 selfloop transitions, 14 changer transitions 2/42 dead transitions. [2023-11-17 16:14:03,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 363 flow [2023-11-17 16:14:03,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:14:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:14:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 297 transitions. [2023-11-17 16:14:03,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43676470588235294 [2023-11-17 16:14:03,194 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 297 transitions. [2023-11-17 16:14:03,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 297 transitions. [2023-11-17 16:14:03,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:03,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 297 transitions. [2023-11-17 16:14:03,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 59.4) internal successors, (297), 5 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,197 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,197 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 262 flow. Second operand 5 states and 297 transitions. [2023-11-17 16:14:03,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 363 flow [2023-11-17 16:14:03,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 287 flow, removed 17 selfloop flow, removed 7 redundant places. [2023-11-17 16:14:03,200 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 210 flow [2023-11-17 16:14:03,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2023-11-17 16:14:03,201 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-11-17 16:14:03,201 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 210 flow [2023-11-17 16:14:03,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:03,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:03,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 16:14:03,203 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 16:14:03,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:03,203 INFO L85 PathProgramCache]: Analyzing trace with hash 977655432, now seen corresponding path program 1 times [2023-11-17 16:14:03,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:03,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014684891] [2023-11-17 16:14:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:03,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:03,281 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 16:14:03,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:03,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014684891] [2023-11-17 16:14:03,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014684891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:03,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222398179] [2023-11-17 16:14:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:03,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:03,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:03,283 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 16:14:03,294 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 16:14:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:03,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:14:03,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:03,377 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 16:14:03,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:03,397 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 16:14:03,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222398179] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:03,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:03,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2023-11-17 16:14:03,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375679605] [2023-11-17 16:14:03,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:03,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:14:03,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:03,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:14:03,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:14:03,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 136 [2023-11-17 16:14:03,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:03,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 136 [2023-11-17 16:14:03,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:03,462 INFO L124 PetriNetUnfolderBase]: 136/254 cut-off events. [2023-11-17 16:14:03,462 INFO L125 PetriNetUnfolderBase]: For 421/421 co-relation queries the response was YES. [2023-11-17 16:14:03,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 254 events. 136/254 cut-off events. For 421/421 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 870 event pairs, 18 based on Foata normal form. 7/261 useless extension candidates. Maximal degree in co-relation 827. Up to 123 conditions per place. [2023-11-17 16:14:03,464 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 45 selfloop transitions, 11 changer transitions 11/67 dead transitions. [2023-11-17 16:14:03,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 67 transitions, 504 flow [2023-11-17 16:14:03,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:14:03,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:14:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 303 transitions. [2023-11-17 16:14:03,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5569852941176471 [2023-11-17 16:14:03,466 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 303 transitions. [2023-11-17 16:14:03,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 303 transitions. [2023-11-17 16:14:03,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:03,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 303 transitions. [2023-11-17 16:14:03,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,468 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,468 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 210 flow. Second operand 4 states and 303 transitions. [2023-11-17 16:14:03,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 67 transitions, 504 flow [2023-11-17 16:14:03,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 67 transitions, 458 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-17 16:14:03,471 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 282 flow [2023-11-17 16:14:03,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-17 16:14:03,472 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2023-11-17 16:14:03,472 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 282 flow [2023-11-17 16:14:03,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:03,473 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:03,481 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 16:14:03,678 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 16:14:03,679 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 16:14:03,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:03,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1419209280, now seen corresponding path program 2 times [2023-11-17 16:14:03,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:03,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239053562] [2023-11-17 16:14:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:03,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:03,758 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 16:14:03,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:03,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239053562] [2023-11-17 16:14:03,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239053562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:03,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862509631] [2023-11-17 16:14:03,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:14:03,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:03,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:03,760 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 16:14:03,780 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 16:14:03,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:14:03,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:03,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:14:03,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:03,882 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 16:14:03,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:03,916 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 16:14:03,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862509631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:03,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:03,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 16:14:03,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667953539] [2023-11-17 16:14:03,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:03,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:14:03,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:03,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:14:03,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:14:03,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:03,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 282 flow. Second operand has 12 states, 12 states have (on average 56.25) internal successors, (675), 12 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:03,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:03,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:04,081 INFO L124 PetriNetUnfolderBase]: 182/328 cut-off events. [2023-11-17 16:14:04,082 INFO L125 PetriNetUnfolderBase]: For 647/647 co-relation queries the response was YES. [2023-11-17 16:14:04,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 328 events. 182/328 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1192 event pairs, 34 based on Foata normal form. 12/340 useless extension candidates. Maximal degree in co-relation 1239. Up to 169 conditions per place. [2023-11-17 16:14:04,085 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 49 selfloop transitions, 37 changer transitions 1/87 dead transitions. [2023-11-17 16:14:04,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 87 transitions, 741 flow [2023-11-17 16:14:04,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 16:14:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 16:14:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 764 transitions. [2023-11-17 16:14:04,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4321266968325792 [2023-11-17 16:14:04,088 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 764 transitions. [2023-11-17 16:14:04,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 764 transitions. [2023-11-17 16:14:04,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:04,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 764 transitions. [2023-11-17 16:14:04,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 58.76923076923077) internal successors, (764), 13 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:04,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:04,094 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:04,094 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 282 flow. Second operand 13 states and 764 transitions. [2023-11-17 16:14:04,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 87 transitions, 741 flow [2023-11-17 16:14:04,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 715 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-11-17 16:14:04,100 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 571 flow [2023-11-17 16:14:04,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=571, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2023-11-17 16:14:04,101 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-17 16:14:04,101 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 571 flow [2023-11-17 16:14:04,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 56.25) internal successors, (675), 12 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:04,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:04,102 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:04,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 16:14:04,307 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 16:14:04,308 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 16:14:04,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:04,308 INFO L85 PathProgramCache]: Analyzing trace with hash -633942268, now seen corresponding path program 3 times [2023-11-17 16:14:04,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:04,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751169491] [2023-11-17 16:14:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:04,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:04,385 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 16:14:04,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:04,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751169491] [2023-11-17 16:14:04,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751169491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:04,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570570504] [2023-11-17 16:14:04,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:14:04,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:04,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:04,387 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 16:14:04,391 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 16:14:04,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:14:04,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:04,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:14:04,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:04,496 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 16:14:04,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:04,535 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 16:14:04,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570570504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:04,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:04,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-17 16:14:04,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900666098] [2023-11-17 16:14:04,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:04,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:14:04,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:04,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:14:04,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:14:04,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:04,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 571 flow. Second operand has 11 states, 11 states have (on average 56.36363636363637) internal successors, (620), 11 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:04,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:04,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:04,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:04,733 INFO L124 PetriNetUnfolderBase]: 209/382 cut-off events. [2023-11-17 16:14:04,733 INFO L125 PetriNetUnfolderBase]: For 1133/1133 co-relation queries the response was YES. [2023-11-17 16:14:04,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 382 events. 209/382 cut-off events. For 1133/1133 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1471 event pairs, 19 based on Foata normal form. 8/390 useless extension candidates. Maximal degree in co-relation 1758. Up to 122 conditions per place. [2023-11-17 16:14:04,737 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 67 selfloop transitions, 32 changer transitions 12/111 dead transitions. [2023-11-17 16:14:04,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 111 transitions, 1093 flow [2023-11-17 16:14:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:14:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:14:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 600 transitions. [2023-11-17 16:14:04,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2023-11-17 16:14:04,740 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 600 transitions. [2023-11-17 16:14:04,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 600 transitions. [2023-11-17 16:14:04,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:04,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 600 transitions. [2023-11-17 16:14:04,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.0) internal successors, (600), 10 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 16:14:04,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:04,745 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:04,745 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 571 flow. Second operand 10 states and 600 transitions. [2023-11-17 16:14:04,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 111 transitions, 1093 flow [2023-11-17 16:14:04,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 111 transitions, 897 flow, removed 74 selfloop flow, removed 6 redundant places. [2023-11-17 16:14:04,754 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 651 flow [2023-11-17 16:14:04,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=651, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2023-11-17 16:14:04,755 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 49 predicate places. [2023-11-17 16:14:04,755 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 651 flow [2023-11-17 16:14:04,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 56.36363636363637) internal successors, (620), 11 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:04,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:04,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:04,767 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 16:14:04,962 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 16:14:04,962 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 16:14:04,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:04,963 INFO L85 PathProgramCache]: Analyzing trace with hash -404171260, now seen corresponding path program 4 times [2023-11-17 16:14:04,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:04,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441328468] [2023-11-17 16:14:04,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:04,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:05,028 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 16:14:05,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:05,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441328468] [2023-11-17 16:14:05,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441328468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:05,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703230155] [2023-11-17 16:14:05,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:14:05,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:05,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:05,030 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 16:14:05,044 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 16:14:05,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:14:05,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:05,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:14:05,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:05,160 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 16:14:05,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:05,199 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 16:14:05,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703230155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:05,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:05,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 16:14:05,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974132781] [2023-11-17 16:14:05,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:05,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:14:05,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:05,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:14:05,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:14:05,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:05,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 651 flow. Second operand has 12 states, 12 states have (on average 56.25) internal successors, (675), 12 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:05,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:05,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:05,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:05,446 INFO L124 PetriNetUnfolderBase]: 188/350 cut-off events. [2023-11-17 16:14:05,447 INFO L125 PetriNetUnfolderBase]: For 1423/1423 co-relation queries the response was YES. [2023-11-17 16:14:05,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1822 conditions, 350 events. 188/350 cut-off events. For 1423/1423 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1316 event pairs, 23 based on Foata normal form. 26/376 useless extension candidates. Maximal degree in co-relation 1562. Up to 132 conditions per place. [2023-11-17 16:14:05,450 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 54 selfloop transitions, 52 changer transitions 1/107 dead transitions. [2023-11-17 16:14:05,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 107 transitions, 1064 flow [2023-11-17 16:14:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:14:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:14:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 942 transitions. [2023-11-17 16:14:05,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329044117647059 [2023-11-17 16:14:05,454 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 942 transitions. [2023-11-17 16:14:05,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 942 transitions. [2023-11-17 16:14:05,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:05,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 942 transitions. [2023-11-17 16:14:05,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.875) internal successors, (942), 16 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:05,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:05,460 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:05,460 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 651 flow. Second operand 16 states and 942 transitions. [2023-11-17 16:14:05,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 107 transitions, 1064 flow [2023-11-17 16:14:05,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 107 transitions, 975 flow, removed 37 selfloop flow, removed 4 redundant places. [2023-11-17 16:14:05,468 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 763 flow [2023-11-17 16:14:05,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=763, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2023-11-17 16:14:05,469 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 63 predicate places. [2023-11-17 16:14:05,469 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 763 flow [2023-11-17 16:14:05,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 56.25) internal successors, (675), 12 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:05,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:05,470 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:05,477 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 16:14:05,675 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 16:14:05,676 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 16:14:05,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:05,676 INFO L85 PathProgramCache]: Analyzing trace with hash 222006290, now seen corresponding path program 5 times [2023-11-17 16:14:05,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:05,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559920718] [2023-11-17 16:14:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:05,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:05,748 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 16:14:05,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:05,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559920718] [2023-11-17 16:14:05,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559920718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:05,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099077133] [2023-11-17 16:14:05,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:14:05,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:05,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:05,750 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 16:14:05,774 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 16:14:05,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:14:05,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:05,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:14:05,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:05,875 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 16:14:05,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:05,919 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 16:14:05,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099077133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:05,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:05,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 16:14:05,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412165736] [2023-11-17 16:14:05,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:05,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:14:05,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:05,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:14:05,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:14:05,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:05,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 763 flow. Second operand has 13 states, 13 states have (on average 56.30769230769231) internal successors, (732), 13 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:05,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:05,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:05,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:06,181 INFO L124 PetriNetUnfolderBase]: 246/452 cut-off events. [2023-11-17 16:14:06,181 INFO L125 PetriNetUnfolderBase]: For 1986/1986 co-relation queries the response was YES. [2023-11-17 16:14:06,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2464 conditions, 452 events. 246/452 cut-off events. For 1986/1986 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1827 event pairs, 29 based on Foata normal form. 10/462 useless extension candidates. Maximal degree in co-relation 2215. Up to 180 conditions per place. [2023-11-17 16:14:06,185 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 76 selfloop transitions, 54 changer transitions 0/130 dead transitions. [2023-11-17 16:14:06,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 130 transitions, 1396 flow [2023-11-17 16:14:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 16:14:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 16:14:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 825 transitions. [2023-11-17 16:14:06,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332983193277311 [2023-11-17 16:14:06,188 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 825 transitions. [2023-11-17 16:14:06,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 825 transitions. [2023-11-17 16:14:06,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:06,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 825 transitions. [2023-11-17 16:14:06,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 58.92857142857143) internal successors, (825), 14 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:06,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 136.0) internal successors, (2040), 15 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:06,193 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 136.0) internal successors, (2040), 15 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:06,193 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 763 flow. Second operand 14 states and 825 transitions. [2023-11-17 16:14:06,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 130 transitions, 1396 flow [2023-11-17 16:14:06,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 130 transitions, 1237 flow, removed 30 selfloop flow, removed 10 redundant places. [2023-11-17 16:14:06,202 INFO L231 Difference]: Finished difference. Result has 90 places, 102 transitions, 1049 flow [2023-11-17 16:14:06,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1049, PETRI_PLACES=90, PETRI_TRANSITIONS=102} [2023-11-17 16:14:06,203 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 70 predicate places. [2023-11-17 16:14:06,203 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 102 transitions, 1049 flow [2023-11-17 16:14:06,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.30769230769231) internal successors, (732), 13 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:06,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:06,204 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:06,211 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 16:14:06,409 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 16:14:06,409 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 16:14:06,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:06,409 INFO L85 PathProgramCache]: Analyzing trace with hash -212661568, now seen corresponding path program 6 times [2023-11-17 16:14:06,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:06,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359923278] [2023-11-17 16:14:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:06,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:06,483 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 16:14:06,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:06,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359923278] [2023-11-17 16:14:06,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359923278] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:06,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606891154] [2023-11-17 16:14:06,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:14:06,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:06,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:06,485 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 16:14:06,489 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 16:14:06,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:14:06,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:06,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:14:06,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:06,620 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 16:14:06,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:06,671 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 16:14:06,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606891154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:06,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:06,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 16:14:06,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236718175] [2023-11-17 16:14:06,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:06,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:14:06,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:06,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:14:06,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:14:06,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:06,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 102 transitions, 1049 flow. Second operand has 15 states, 15 states have (on average 56.2) internal successors, (843), 15 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:06,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:06,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:06,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:07,122 INFO L124 PetriNetUnfolderBase]: 396/722 cut-off events. [2023-11-17 16:14:07,123 INFO L125 PetriNetUnfolderBase]: For 3546/3546 co-relation queries the response was YES. [2023-11-17 16:14:07,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4138 conditions, 722 events. 396/722 cut-off events. For 3546/3546 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3375 event pairs, 30 based on Foata normal form. 10/732 useless extension candidates. Maximal degree in co-relation 3723. Up to 237 conditions per place. [2023-11-17 16:14:07,129 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 86 selfloop transitions, 120 changer transitions 1/207 dead transitions. [2023-11-17 16:14:07,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 207 transitions, 2342 flow [2023-11-17 16:14:07,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 16:14:07,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 16:14:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1345 transitions. [2023-11-17 16:14:07,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42998721227621484 [2023-11-17 16:14:07,134 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1345 transitions. [2023-11-17 16:14:07,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1345 transitions. [2023-11-17 16:14:07,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:07,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1345 transitions. [2023-11-17 16:14:07,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 58.47826086956522) internal successors, (1345), 23 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:07,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 136.0) internal successors, (3264), 24 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:07,143 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 136.0) internal successors, (3264), 24 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:07,143 INFO L175 Difference]: Start difference. First operand has 90 places, 102 transitions, 1049 flow. Second operand 23 states and 1345 transitions. [2023-11-17 16:14:07,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 207 transitions, 2342 flow [2023-11-17 16:14:07,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 207 transitions, 2200 flow, removed 56 selfloop flow, removed 4 redundant places. [2023-11-17 16:14:07,168 INFO L231 Difference]: Finished difference. Result has 115 places, 165 transitions, 2024 flow [2023-11-17 16:14:07,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2024, PETRI_PLACES=115, PETRI_TRANSITIONS=165} [2023-11-17 16:14:07,169 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 95 predicate places. [2023-11-17 16:14:07,170 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 165 transitions, 2024 flow [2023-11-17 16:14:07,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.2) internal successors, (843), 15 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:07,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:07,170 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:07,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 16:14:07,376 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 16:14:07,376 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 16:14:07,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:07,377 INFO L85 PathProgramCache]: Analyzing trace with hash -368360718, now seen corresponding path program 7 times [2023-11-17 16:14:07,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:07,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344578705] [2023-11-17 16:14:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:07,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:07,440 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 16:14:07,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:07,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344578705] [2023-11-17 16:14:07,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344578705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:07,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695932839] [2023-11-17 16:14:07,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:14:07,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:07,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:07,443 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 16:14:07,446 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 16:14:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:07,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:14:07,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:07,553 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 16:14:07,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:07,596 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 16:14:07,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695932839] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:07,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:07,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 16:14:07,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480362738] [2023-11-17 16:14:07,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:07,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:14:07,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:07,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:14:07,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:14:07,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:07,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 165 transitions, 2024 flow. Second operand has 15 states, 15 states have (on average 55.733333333333334) internal successors, (836), 15 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:07,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:07,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:07,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:07,942 INFO L124 PetriNetUnfolderBase]: 438/790 cut-off events. [2023-11-17 16:14:07,942 INFO L125 PetriNetUnfolderBase]: For 6368/6368 co-relation queries the response was YES. [2023-11-17 16:14:07,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 790 events. 438/790 cut-off events. For 6368/6368 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3691 event pairs, 97 based on Foata normal form. 34/824 useless extension candidates. Maximal degree in co-relation 4729. Up to 620 conditions per place. [2023-11-17 16:14:07,951 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 171 selfloop transitions, 54 changer transitions 0/225 dead transitions. [2023-11-17 16:14:07,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 225 transitions, 3053 flow [2023-11-17 16:14:07,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:14:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:14:07,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1062 transitions. [2023-11-17 16:14:07,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4338235294117647 [2023-11-17 16:14:07,956 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1062 transitions. [2023-11-17 16:14:07,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1062 transitions. [2023-11-17 16:14:07,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:07,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1062 transitions. [2023-11-17 16:14:07,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 59.0) internal successors, (1062), 18 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:07,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 136.0) internal successors, (2584), 19 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:07,967 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 136.0) internal successors, (2584), 19 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:07,967 INFO L175 Difference]: Start difference. First operand has 115 places, 165 transitions, 2024 flow. Second operand 18 states and 1062 transitions. [2023-11-17 16:14:07,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 225 transitions, 3053 flow [2023-11-17 16:14:07,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 225 transitions, 2895 flow, removed 54 selfloop flow, removed 8 redundant places. [2023-11-17 16:14:08,002 INFO L231 Difference]: Finished difference. Result has 136 places, 193 transitions, 2504 flow [2023-11-17 16:14:08,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2504, PETRI_PLACES=136, PETRI_TRANSITIONS=193} [2023-11-17 16:14:08,003 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 116 predicate places. [2023-11-17 16:14:08,003 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 193 transitions, 2504 flow [2023-11-17 16:14:08,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.733333333333334) internal successors, (836), 15 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:08,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:08,004 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:08,012 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 16:14:08,209 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 16:14:08,209 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 16:14:08,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:08,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1346415112, now seen corresponding path program 8 times [2023-11-17 16:14:08,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:08,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401797214] [2023-11-17 16:14:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:08,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:08,267 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 16:14:08,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:08,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401797214] [2023-11-17 16:14:08,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401797214] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:08,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123403056] [2023-11-17 16:14:08,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:14:08,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:08,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:08,269 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 16:14:08,290 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 16:14:08,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:14:08,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:08,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:14:08,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:08,385 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 16:14:08,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:08,414 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 16:14:08,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123403056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:08,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:08,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 16:14:08,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888108369] [2023-11-17 16:14:08,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:08,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:14:08,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:08,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:14:08,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:14:08,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:08,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 193 transitions, 2504 flow. Second operand has 13 states, 13 states have (on average 55.92307692307692) internal successors, (727), 13 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:08,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:08,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:08,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:08,664 INFO L124 PetriNetUnfolderBase]: 443/793 cut-off events. [2023-11-17 16:14:08,664 INFO L125 PetriNetUnfolderBase]: For 9034/9034 co-relation queries the response was YES. [2023-11-17 16:14:08,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5558 conditions, 793 events. 443/793 cut-off events. For 9034/9034 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3691 event pairs, 98 based on Foata normal form. 6/799 useless extension candidates. Maximal degree in co-relation 5294. Up to 645 conditions per place. [2023-11-17 16:14:08,674 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 160 selfloop transitions, 50 changer transitions 3/213 dead transitions. [2023-11-17 16:14:08,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 213 transitions, 3164 flow [2023-11-17 16:14:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:14:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:14:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 645 transitions. [2023-11-17 16:14:08,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43114973262032086 [2023-11-17 16:14:08,677 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 645 transitions. [2023-11-17 16:14:08,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 645 transitions. [2023-11-17 16:14:08,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:08,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 645 transitions. [2023-11-17 16:14:08,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.63636363636363) internal successors, (645), 11 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:08,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:08,680 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:08,681 INFO L175 Difference]: Start difference. First operand has 136 places, 193 transitions, 2504 flow. Second operand 11 states and 645 transitions. [2023-11-17 16:14:08,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 213 transitions, 3164 flow [2023-11-17 16:14:08,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 213 transitions, 2790 flow, removed 171 selfloop flow, removed 5 redundant places. [2023-11-17 16:14:08,726 INFO L231 Difference]: Finished difference. Result has 142 places, 195 transitions, 2290 flow [2023-11-17 16:14:08,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2290, PETRI_PLACES=142, PETRI_TRANSITIONS=195} [2023-11-17 16:14:08,728 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 122 predicate places. [2023-11-17 16:14:08,728 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 195 transitions, 2290 flow [2023-11-17 16:14:08,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 55.92307692307692) internal successors, (727), 13 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:08,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:08,729 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:08,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-17 16:14:08,935 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 16:14:08,935 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 16:14:08,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:08,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1016104605, now seen corresponding path program 9 times [2023-11-17 16:14:08,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:08,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729964127] [2023-11-17 16:14:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:08,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:09,021 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 16:14:09,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:09,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729964127] [2023-11-17 16:14:09,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729964127] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:09,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094098200] [2023-11-17 16:14:09,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:14:09,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:09,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:09,023 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 16:14:09,046 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 16:14:09,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:14:09,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:09,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 16:14:09,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:09,131 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 16:14:09,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:09,149 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 16:14:09,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094098200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:09,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:09,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-11-17 16:14:09,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822880070] [2023-11-17 16:14:09,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:09,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:14:09,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:14:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:14:09,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 136 [2023-11-17 16:14:09,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 195 transitions, 2290 flow. Second operand has 5 states, 5 states have (on average 69.4) internal successors, (347), 5 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:09,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:09,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 136 [2023-11-17 16:14:09,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:09,392 INFO L124 PetriNetUnfolderBase]: 669/1192 cut-off events. [2023-11-17 16:14:09,392 INFO L125 PetriNetUnfolderBase]: For 11884/11884 co-relation queries the response was YES. [2023-11-17 16:14:09,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8029 conditions, 1192 events. 669/1192 cut-off events. For 11884/11884 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6171 event pairs, 40 based on Foata normal form. 7/1199 useless extension candidates. Maximal degree in co-relation 7605. Up to 630 conditions per place. [2023-11-17 16:14:09,406 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 200 selfloop transitions, 81 changer transitions 48/329 dead transitions. [2023-11-17 16:14:09,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 329 transitions, 4446 flow [2023-11-17 16:14:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:14:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:14:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 381 transitions. [2023-11-17 16:14:09,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5602941176470588 [2023-11-17 16:14:09,407 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 381 transitions. [2023-11-17 16:14:09,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 381 transitions. [2023-11-17 16:14:09,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:09,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 381 transitions. [2023-11-17 16:14:09,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.2) internal successors, (381), 5 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 16:14:09,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:09,412 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:09,412 INFO L175 Difference]: Start difference. First operand has 142 places, 195 transitions, 2290 flow. Second operand 5 states and 381 transitions. [2023-11-17 16:14:09,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 329 transitions, 4446 flow [2023-11-17 16:14:09,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 329 transitions, 4347 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-17 16:14:09,472 INFO L231 Difference]: Finished difference. Result has 144 places, 241 transitions, 3107 flow [2023-11-17 16:14:09,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3107, PETRI_PLACES=144, PETRI_TRANSITIONS=241} [2023-11-17 16:14:09,472 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 124 predicate places. [2023-11-17 16:14:09,472 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 241 transitions, 3107 flow [2023-11-17 16:14:09,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.4) internal successors, (347), 5 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:09,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:09,473 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:09,481 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 16:14:09,679 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 16:14:09,679 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 16:14:09,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:09,679 INFO L85 PathProgramCache]: Analyzing trace with hash 268416117, now seen corresponding path program 10 times [2023-11-17 16:14:09,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:09,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832205827] [2023-11-17 16:14:09,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:09,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:09,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:09,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832205827] [2023-11-17 16:14:09,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832205827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:09,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918454445] [2023-11-17 16:14:09,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:14:09,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:09,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:09,778 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 16:14:09,796 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 16:14:09,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:14:09,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:09,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:14:09,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:09,915 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 16:14:09,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:09,969 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 16:14:09,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918454445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:09,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:09,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-17 16:14:09,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675806033] [2023-11-17 16:14:09,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:09,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:14:09,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:09,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:14:09,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:14:09,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:09,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 241 transitions, 3107 flow. Second operand has 14 states, 14 states have (on average 56.07142857142857) internal successors, (785), 14 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:09,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:09,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:09,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:10,355 INFO L124 PetriNetUnfolderBase]: 775/1418 cut-off events. [2023-11-17 16:14:10,355 INFO L125 PetriNetUnfolderBase]: For 17242/17242 co-relation queries the response was YES. [2023-11-17 16:14:10,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10322 conditions, 1418 events. 775/1418 cut-off events. For 17242/17242 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7877 event pairs, 33 based on Foata normal form. 10/1428 useless extension candidates. Maximal degree in co-relation 9788. Up to 564 conditions per place. [2023-11-17 16:14:10,374 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 214 selfloop transitions, 129 changer transitions 21/364 dead transitions. [2023-11-17 16:14:10,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 364 transitions, 5275 flow [2023-11-17 16:14:10,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 16:14:10,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 16:14:10,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 776 transitions. [2023-11-17 16:14:10,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43891402714932126 [2023-11-17 16:14:10,376 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 776 transitions. [2023-11-17 16:14:10,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 776 transitions. [2023-11-17 16:14:10,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:10,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 776 transitions. [2023-11-17 16:14:10,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 59.69230769230769) internal successors, (776), 13 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:10,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:10,380 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:10,380 INFO L175 Difference]: Start difference. First operand has 144 places, 241 transitions, 3107 flow. Second operand 13 states and 776 transitions. [2023-11-17 16:14:10,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 364 transitions, 5275 flow [2023-11-17 16:14:10,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 364 transitions, 5169 flow, removed 53 selfloop flow, removed 0 redundant places. [2023-11-17 16:14:10,473 INFO L231 Difference]: Finished difference. Result has 164 places, 303 transitions, 4449 flow [2023-11-17 16:14:10,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4449, PETRI_PLACES=164, PETRI_TRANSITIONS=303} [2023-11-17 16:14:10,474 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 144 predicate places. [2023-11-17 16:14:10,474 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 303 transitions, 4449 flow [2023-11-17 16:14:10,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 56.07142857142857) internal successors, (785), 14 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:10,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:10,475 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:10,484 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 16:14:10,682 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 16:14:10,682 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 16:14:10,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:10,682 INFO L85 PathProgramCache]: Analyzing trace with hash 484674421, now seen corresponding path program 11 times [2023-11-17 16:14:10,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:10,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191986005] [2023-11-17 16:14:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:10,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:10,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:10,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191986005] [2023-11-17 16:14:10,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191986005] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:10,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513814198] [2023-11-17 16:14:10,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:14:10,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:10,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:10,793 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 16:14:10,808 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 16:14:10,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:14:10,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:10,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:14:10,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:10,913 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 16:14:10,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:10,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513814198] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:10,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:10,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-17 16:14:10,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050519189] [2023-11-17 16:14:10,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:10,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 16:14:10,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:10,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 16:14:10,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-17 16:14:10,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:10,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 303 transitions, 4449 flow. Second operand has 16 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:10,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:10,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:10,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:11,517 INFO L124 PetriNetUnfolderBase]: 841/1502 cut-off events. [2023-11-17 16:14:11,518 INFO L125 PetriNetUnfolderBase]: For 21648/21648 co-relation queries the response was YES. [2023-11-17 16:14:11,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11840 conditions, 1502 events. 841/1502 cut-off events. For 21648/21648 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8159 event pairs, 73 based on Foata normal form. 16/1518 useless extension candidates. Maximal degree in co-relation 11409. Up to 557 conditions per place. [2023-11-17 16:14:11,544 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 223 selfloop transitions, 166 changer transitions 0/389 dead transitions. [2023-11-17 16:14:11,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 389 transitions, 6191 flow [2023-11-17 16:14:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 16:14:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 16:14:11,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1118 transitions. [2023-11-17 16:14:11,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326625386996904 [2023-11-17 16:14:11,547 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1118 transitions. [2023-11-17 16:14:11,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1118 transitions. [2023-11-17 16:14:11,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:11,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1118 transitions. [2023-11-17 16:14:11,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 58.8421052631579) internal successors, (1118), 19 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:11,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 136.0) internal successors, (2720), 20 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:11,552 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 136.0) internal successors, (2720), 20 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:11,552 INFO L175 Difference]: Start difference. First operand has 164 places, 303 transitions, 4449 flow. Second operand 19 states and 1118 transitions. [2023-11-17 16:14:11,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 389 transitions, 6191 flow [2023-11-17 16:14:11,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 389 transitions, 6056 flow, removed 59 selfloop flow, removed 3 redundant places. [2023-11-17 16:14:11,660 INFO L231 Difference]: Finished difference. Result has 187 places, 342 transitions, 5471 flow [2023-11-17 16:14:11,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=4348, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5471, PETRI_PLACES=187, PETRI_TRANSITIONS=342} [2023-11-17 16:14:11,661 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 167 predicate places. [2023-11-17 16:14:11,661 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 342 transitions, 5471 flow [2023-11-17 16:14:11,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:11,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:11,661 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:11,667 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 16:14:11,868 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 16:14:11,868 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 16:14:11,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:11,868 INFO L85 PathProgramCache]: Analyzing trace with hash 568063693, now seen corresponding path program 12 times [2023-11-17 16:14:11,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:11,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648358690] [2023-11-17 16:14:11,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:11,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:11,963 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 16:14:11,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:11,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648358690] [2023-11-17 16:14:11,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648358690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:11,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612506412] [2023-11-17 16:14:11,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:14:11,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:11,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:11,965 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 16:14:11,984 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 16:14:12,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 16:14:12,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:12,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:14:12,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:12,120 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 16:14:12,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:12,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612506412] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:12,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:12,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 16:14:12,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940698304] [2023-11-17 16:14:12,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:12,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:14:12,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:12,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:14:12,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:14:12,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:12,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 342 transitions, 5471 flow. Second operand has 15 states, 15 states have (on average 55.8) internal successors, (837), 15 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:12,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:12,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:12,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:12,703 INFO L124 PetriNetUnfolderBase]: 979/1708 cut-off events. [2023-11-17 16:14:12,703 INFO L125 PetriNetUnfolderBase]: For 28760/28760 co-relation queries the response was YES. [2023-11-17 16:14:12,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14802 conditions, 1708 events. 979/1708 cut-off events. For 28760/28760 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9358 event pairs, 127 based on Foata normal form. 18/1726 useless extension candidates. Maximal degree in co-relation 14297. Up to 885 conditions per place. [2023-11-17 16:14:12,728 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 174 selfloop transitions, 257 changer transitions 7/438 dead transitions. [2023-11-17 16:14:12,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 438 transitions, 7988 flow [2023-11-17 16:14:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 16:14:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 16:14:12,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1113 transitions. [2023-11-17 16:14:12,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43072755417956654 [2023-11-17 16:14:12,730 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1113 transitions. [2023-11-17 16:14:12,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1113 transitions. [2023-11-17 16:14:12,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:12,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1113 transitions. [2023-11-17 16:14:12,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 58.578947368421055) internal successors, (1113), 19 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 16:14:12,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 136.0) internal successors, (2720), 20 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:12,749 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 136.0) internal successors, (2720), 20 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:12,749 INFO L175 Difference]: Start difference. First operand has 187 places, 342 transitions, 5471 flow. Second operand 19 states and 1113 transitions. [2023-11-17 16:14:12,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 438 transitions, 7988 flow [2023-11-17 16:14:12,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 438 transitions, 7735 flow, removed 102 selfloop flow, removed 5 redundant places. [2023-11-17 16:14:12,918 INFO L231 Difference]: Finished difference. Result has 206 places, 399 transitions, 7170 flow [2023-11-17 16:14:12,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=5270, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7170, PETRI_PLACES=206, PETRI_TRANSITIONS=399} [2023-11-17 16:14:12,918 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 186 predicate places. [2023-11-17 16:14:12,918 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 399 transitions, 7170 flow [2023-11-17 16:14:12,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.8) internal successors, (837), 15 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:12,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:12,919 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:12,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-17 16:14:13,119 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 16:14:13,120 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 16:14:13,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:13,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1628182429, now seen corresponding path program 13 times [2023-11-17 16:14:13,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:13,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374797556] [2023-11-17 16:14:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:13,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:13,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:13,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374797556] [2023-11-17 16:14:13,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374797556] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:13,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156192203] [2023-11-17 16:14:13,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:14:13,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:13,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:13,210 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 16:14:13,228 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 16:14:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:13,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:14:13,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:13,353 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 16:14:13,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:13,409 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 16:14:13,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156192203] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:13,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:13,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 16:14:13,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330991327] [2023-11-17 16:14:13,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:13,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:14:13,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:13,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:14:13,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:14:13,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:13,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 399 transitions, 7170 flow. Second operand has 15 states, 15 states have (on average 56.06666666666667) internal successors, (841), 15 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:13,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:13,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:13,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:14,183 INFO L124 PetriNetUnfolderBase]: 1070/1885 cut-off events. [2023-11-17 16:14:14,183 INFO L125 PetriNetUnfolderBase]: For 39420/39420 co-relation queries the response was YES. [2023-11-17 16:14:14,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17305 conditions, 1885 events. 1070/1885 cut-off events. For 39420/39420 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10541 event pairs, 65 based on Foata normal form. 36/1921 useless extension candidates. Maximal degree in co-relation 16761. Up to 513 conditions per place. [2023-11-17 16:14:14,207 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 216 selfloop transitions, 266 changer transitions 6/488 dead transitions. [2023-11-17 16:14:14,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 488 transitions, 9354 flow [2023-11-17 16:14:14,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 16:14:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 16:14:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1235 transitions. [2023-11-17 16:14:14,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4324229691876751 [2023-11-17 16:14:14,210 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1235 transitions. [2023-11-17 16:14:14,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1235 transitions. [2023-11-17 16:14:14,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:14,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1235 transitions. [2023-11-17 16:14:14,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 58.80952380952381) internal successors, (1235), 21 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:14,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 136.0) internal successors, (2992), 22 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:14,215 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 136.0) internal successors, (2992), 22 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:14,216 INFO L175 Difference]: Start difference. First operand has 206 places, 399 transitions, 7170 flow. Second operand 21 states and 1235 transitions. [2023-11-17 16:14:14,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 488 transitions, 9354 flow [2023-11-17 16:14:14,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 488 transitions, 8164 flow, removed 357 selfloop flow, removed 14 redundant places. [2023-11-17 16:14:14,425 INFO L231 Difference]: Finished difference. Result has 220 places, 437 transitions, 7579 flow [2023-11-17 16:14:14,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=6110, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7579, PETRI_PLACES=220, PETRI_TRANSITIONS=437} [2023-11-17 16:14:14,426 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 200 predicate places. [2023-11-17 16:14:14,426 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 437 transitions, 7579 flow [2023-11-17 16:14:14,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.06666666666667) internal successors, (841), 15 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:14,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:14,427 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:14,433 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 16:14:14,632 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 16:14:14,633 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 16:14:14,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:14,633 INFO L85 PathProgramCache]: Analyzing trace with hash 485447043, now seen corresponding path program 14 times [2023-11-17 16:14:14,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:14,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138947930] [2023-11-17 16:14:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:14,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:14,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:14,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138947930] [2023-11-17 16:14:14,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138947930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:14,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004427707] [2023-11-17 16:14:14,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:14:14,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:14,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:14,713 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 16:14:14,744 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 16:14:14,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:14:14,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:14,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:14:14,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:14,868 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 16:14:14,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:14,934 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 16:14:14,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004427707] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:14,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:14,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 16:14:14,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176407613] [2023-11-17 16:14:14,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:14,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:14:14,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:14,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:14:14,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:14:14,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:14,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 437 transitions, 7579 flow. Second operand has 15 states, 15 states have (on average 56.06666666666667) internal successors, (841), 15 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:14,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:14,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:14,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:15,700 INFO L124 PetriNetUnfolderBase]: 1082/1949 cut-off events. [2023-11-17 16:14:15,700 INFO L125 PetriNetUnfolderBase]: For 45056/45056 co-relation queries the response was YES. [2023-11-17 16:14:15,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17204 conditions, 1949 events. 1082/1949 cut-off events. For 45056/45056 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 11357 event pairs, 70 based on Foata normal form. 38/1987 useless extension candidates. Maximal degree in co-relation 16643. Up to 706 conditions per place. [2023-11-17 16:14:15,725 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 143 selfloop transitions, 348 changer transitions 1/492 dead transitions. [2023-11-17 16:14:15,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 492 transitions, 9212 flow [2023-11-17 16:14:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:14:15,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:14:15,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1406 transitions. [2023-11-17 16:14:15,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43075980392156865 [2023-11-17 16:14:15,728 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1406 transitions. [2023-11-17 16:14:15,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1406 transitions. [2023-11-17 16:14:15,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:15,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1406 transitions. [2023-11-17 16:14:15,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 58.583333333333336) internal successors, (1406), 24 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:15,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 136.0) internal successors, (3400), 25 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:15,733 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 136.0) internal successors, (3400), 25 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:15,733 INFO L175 Difference]: Start difference. First operand has 220 places, 437 transitions, 7579 flow. Second operand 24 states and 1406 transitions. [2023-11-17 16:14:15,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 492 transitions, 9212 flow [2023-11-17 16:14:15,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 492 transitions, 8875 flow, removed 94 selfloop flow, removed 13 redundant places. [2023-11-17 16:14:15,963 INFO L231 Difference]: Finished difference. Result has 231 places, 450 transitions, 8350 flow [2023-11-17 16:14:15,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=7218, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8350, PETRI_PLACES=231, PETRI_TRANSITIONS=450} [2023-11-17 16:14:15,964 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 211 predicate places. [2023-11-17 16:14:15,964 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 450 transitions, 8350 flow [2023-11-17 16:14:15,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.06666666666667) internal successors, (841), 15 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:15,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:15,965 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:15,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-17 16:14:16,170 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 16:14:16,170 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 16:14:16,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:16,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1603702701, now seen corresponding path program 15 times [2023-11-17 16:14:16,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:16,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038859525] [2023-11-17 16:14:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:16,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:16,260 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 16:14:16,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:16,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038859525] [2023-11-17 16:14:16,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038859525] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:16,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233453788] [2023-11-17 16:14:16,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:14:16,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:16,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:16,261 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 16:14:16,281 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 16:14:16,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:14:16,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:16,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:14:16,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:16,417 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 16:14:16,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:16,465 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 16:14:16,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233453788] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:16,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:16,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-11-17 16:14:16,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949184122] [2023-11-17 16:14:16,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:16,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:14:16,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:16,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:14:16,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:14:16,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:16,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 450 transitions, 8350 flow. Second operand has 15 states, 15 states have (on average 56.13333333333333) internal successors, (842), 15 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:16,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:16,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:16,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:17,296 INFO L124 PetriNetUnfolderBase]: 1463/2612 cut-off events. [2023-11-17 16:14:17,296 INFO L125 PetriNetUnfolderBase]: For 55939/55939 co-relation queries the response was YES. [2023-11-17 16:14:17,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24316 conditions, 2612 events. 1463/2612 cut-off events. For 55939/55939 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 16094 event pairs, 61 based on Foata normal form. 34/2646 useless extension candidates. Maximal degree in co-relation 23705. Up to 677 conditions per place. [2023-11-17 16:14:17,322 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 171 selfloop transitions, 486 changer transitions 7/664 dead transitions. [2023-11-17 16:14:17,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 664 transitions, 13496 flow [2023-11-17 16:14:17,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:14:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:14:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1519 transitions. [2023-11-17 16:14:17,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4295814479638009 [2023-11-17 16:14:17,325 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1519 transitions. [2023-11-17 16:14:17,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1519 transitions. [2023-11-17 16:14:17,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:17,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1519 transitions. [2023-11-17 16:14:17,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 58.42307692307692) internal successors, (1519), 26 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:17,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 136.0) internal successors, (3672), 27 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:17,331 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 136.0) internal successors, (3672), 27 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:17,331 INFO L175 Difference]: Start difference. First operand has 231 places, 450 transitions, 8350 flow. Second operand 26 states and 1519 transitions. [2023-11-17 16:14:17,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 664 transitions, 13496 flow [2023-11-17 16:14:17,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 664 transitions, 12522 flow, removed 126 selfloop flow, removed 20 redundant places. [2023-11-17 16:14:17,612 INFO L231 Difference]: Finished difference. Result has 246 places, 612 transitions, 12284 flow [2023-11-17 16:14:17,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=7747, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=12284, PETRI_PLACES=246, PETRI_TRANSITIONS=612} [2023-11-17 16:14:17,613 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 226 predicate places. [2023-11-17 16:14:17,613 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 612 transitions, 12284 flow [2023-11-17 16:14:17,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.13333333333333) internal successors, (842), 15 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:17,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:17,614 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:17,620 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 16:14:17,814 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 16:14:17,814 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 16:14:17,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:17,815 INFO L85 PathProgramCache]: Analyzing trace with hash -298048501, now seen corresponding path program 16 times [2023-11-17 16:14:17,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:17,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405771464] [2023-11-17 16:14:17,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:17,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:17,902 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 16:14:17,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:17,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405771464] [2023-11-17 16:14:17,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405771464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:17,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326688059] [2023-11-17 16:14:17,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:14:17,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:17,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:17,904 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 16:14:17,930 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 16:14:17,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:14:17,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:17,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:14:17,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:18,049 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 16:14:18,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:18,105 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 16:14:18,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326688059] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:18,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:18,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-17 16:14:18,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767240259] [2023-11-17 16:14:18,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:18,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:14:18,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:18,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:14:18,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:14:18,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:18,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 612 transitions, 12284 flow. Second operand has 18 states, 18 states have (on average 55.94444444444444) internal successors, (1007), 18 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:18,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:18,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:18,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:19,156 INFO L124 PetriNetUnfolderBase]: 1640/2941 cut-off events. [2023-11-17 16:14:19,156 INFO L125 PetriNetUnfolderBase]: For 71494/71494 co-relation queries the response was YES. [2023-11-17 16:14:19,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29309 conditions, 2941 events. 1640/2941 cut-off events. For 71494/71494 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 18748 event pairs, 140 based on Foata normal form. 10/2951 useless extension candidates. Maximal degree in co-relation 28667. Up to 1030 conditions per place. [2023-11-17 16:14:19,186 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 383 selfloop transitions, 369 changer transitions 2/754 dead transitions. [2023-11-17 16:14:19,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 754 transitions, 16168 flow [2023-11-17 16:14:19,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:14:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:14:19,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1695 transitions. [2023-11-17 16:14:19,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42976673427991885 [2023-11-17 16:14:19,189 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1695 transitions. [2023-11-17 16:14:19,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1695 transitions. [2023-11-17 16:14:19,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:19,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1695 transitions. [2023-11-17 16:14:19,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 58.44827586206897) internal successors, (1695), 29 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:19,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 136.0) internal successors, (4080), 30 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:19,195 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 136.0) internal successors, (4080), 30 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:19,195 INFO L175 Difference]: Start difference. First operand has 246 places, 612 transitions, 12284 flow. Second operand 29 states and 1695 transitions. [2023-11-17 16:14:19,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 754 transitions, 16168 flow [2023-11-17 16:14:19,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 754 transitions, 15454 flow, removed 273 selfloop flow, removed 10 redundant places. [2023-11-17 16:14:19,651 INFO L231 Difference]: Finished difference. Result has 269 places, 693 transitions, 14365 flow [2023-11-17 16:14:19,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=11650, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=14365, PETRI_PLACES=269, PETRI_TRANSITIONS=693} [2023-11-17 16:14:19,652 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 249 predicate places. [2023-11-17 16:14:19,652 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 693 transitions, 14365 flow [2023-11-17 16:14:19,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.94444444444444) internal successors, (1007), 18 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:19,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:19,653 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:19,658 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 16:14:19,857 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 16:14:19,857 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 16:14:19,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:19,858 INFO L85 PathProgramCache]: Analyzing trace with hash -188183545, now seen corresponding path program 17 times [2023-11-17 16:14:19,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:19,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101215874] [2023-11-17 16:14:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:19,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:19,946 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 16:14:19,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:19,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101215874] [2023-11-17 16:14:19,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101215874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:19,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682590743] [2023-11-17 16:14:19,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:14:19,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:19,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:19,948 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 16:14:19,979 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 16:14:20,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:14:20,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:20,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:14:20,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:20,131 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 16:14:20,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:20,205 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 16:14:20,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682590743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:20,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:20,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-17 16:14:20,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756454327] [2023-11-17 16:14:20,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:20,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:14:20,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:20,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:14:20,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:14:20,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:20,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 693 transitions, 14365 flow. Second operand has 20 states, 20 states have (on average 55.9) internal successors, (1118), 20 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:20,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:20,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:20,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:21,906 INFO L124 PetriNetUnfolderBase]: 2423/4340 cut-off events. [2023-11-17 16:14:21,906 INFO L125 PetriNetUnfolderBase]: For 111231/111231 co-relation queries the response was YES. [2023-11-17 16:14:21,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44228 conditions, 4340 events. 2423/4340 cut-off events. For 111231/111231 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 29666 event pairs, 139 based on Foata normal form. 32/4372 useless extension candidates. Maximal degree in co-relation 43559. Up to 1197 conditions per place. [2023-11-17 16:14:21,952 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 331 selfloop transitions, 753 changer transitions 10/1094 dead transitions. [2023-11-17 16:14:21,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 1094 transitions, 24717 flow [2023-11-17 16:14:21,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 16:14:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 16:14:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2101 transitions. [2023-11-17 16:14:21,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.429125816993464 [2023-11-17 16:14:21,957 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2101 transitions. [2023-11-17 16:14:21,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2101 transitions. [2023-11-17 16:14:21,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:21,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2101 transitions. [2023-11-17 16:14:21,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 58.361111111111114) internal successors, (2101), 36 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:21,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 136.0) internal successors, (5032), 37 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:21,965 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 136.0) internal successors, (5032), 37 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:21,966 INFO L175 Difference]: Start difference. First operand has 269 places, 693 transitions, 14365 flow. Second operand 36 states and 2101 transitions. [2023-11-17 16:14:21,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 1094 transitions, 24717 flow [2023-11-17 16:14:22,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 1094 transitions, 24124 flow, removed 248 selfloop flow, removed 6 redundant places. [2023-11-17 16:14:22,661 INFO L231 Difference]: Finished difference. Result has 310 places, 1021 transitions, 23990 flow [2023-11-17 16:14:22,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=14038, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=23990, PETRI_PLACES=310, PETRI_TRANSITIONS=1021} [2023-11-17 16:14:22,662 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 290 predicate places. [2023-11-17 16:14:22,662 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 1021 transitions, 23990 flow [2023-11-17 16:14:22,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.9) internal successors, (1118), 20 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:22,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:22,663 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:22,673 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 16:14:22,868 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 16:14:22,868 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 16:14:22,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:22,869 INFO L85 PathProgramCache]: Analyzing trace with hash 662920721, now seen corresponding path program 18 times [2023-11-17 16:14:22,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:22,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907465459] [2023-11-17 16:14:22,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:22,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:22,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:22,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907465459] [2023-11-17 16:14:22,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907465459] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:22,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821353005] [2023-11-17 16:14:22,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:14:22,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:22,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:22,971 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 16:14:22,986 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 16:14:23,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:14:23,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:23,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:14:23,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:23,101 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 16:14:23,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:23,152 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 16:14:23,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821353005] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:23,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:23,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-17 16:14:23,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16603097] [2023-11-17 16:14:23,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:23,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:14:23,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:23,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:14:23,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:14:23,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:23,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 1021 transitions, 23990 flow. Second operand has 20 states, 20 states have (on average 55.55) internal successors, (1111), 20 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:23,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:23,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:23,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:25,168 INFO L124 PetriNetUnfolderBase]: 2490/4449 cut-off events. [2023-11-17 16:14:25,168 INFO L125 PetriNetUnfolderBase]: For 139663/139663 co-relation queries the response was YES. [2023-11-17 16:14:25,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49145 conditions, 4449 events. 2490/4449 cut-off events. For 139663/139663 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 30235 event pairs, 691 based on Foata normal form. 60/4509 useless extension candidates. Maximal degree in co-relation 48463. Up to 3951 conditions per place. [2023-11-17 16:14:25,224 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 984 selfloop transitions, 141 changer transitions 11/1136 dead transitions. [2023-11-17 16:14:25,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1136 transitions, 28436 flow [2023-11-17 16:14:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 16:14:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 16:14:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1762 transitions. [2023-11-17 16:14:25,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43186274509803924 [2023-11-17 16:14:25,227 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1762 transitions. [2023-11-17 16:14:25,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1762 transitions. [2023-11-17 16:14:25,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:25,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1762 transitions. [2023-11-17 16:14:25,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.733333333333334) internal successors, (1762), 30 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:25,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 136.0) internal successors, (4216), 31 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:25,234 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 136.0) internal successors, (4216), 31 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:25,234 INFO L175 Difference]: Start difference. First operand has 310 places, 1021 transitions, 23990 flow. Second operand 30 states and 1762 transitions. [2023-11-17 16:14:25,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1136 transitions, 28436 flow [2023-11-17 16:14:26,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1136 transitions, 27834 flow, removed 255 selfloop flow, removed 10 redundant places. [2023-11-17 16:14:26,266 INFO L231 Difference]: Finished difference. Result has 346 places, 1077 transitions, 25722 flow [2023-11-17 16:14:26,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=23402, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=926, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=25722, PETRI_PLACES=346, PETRI_TRANSITIONS=1077} [2023-11-17 16:14:26,267 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 326 predicate places. [2023-11-17 16:14:26,268 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 1077 transitions, 25722 flow [2023-11-17 16:14:26,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.55) internal successors, (1111), 20 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:26,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:26,268 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:26,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 16:14:26,468 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 16:14:26,469 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 16:14:26,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:26,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1172568247, now seen corresponding path program 19 times [2023-11-17 16:14:26,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:26,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425300053] [2023-11-17 16:14:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:26,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:26,546 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 16:14:26,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:26,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425300053] [2023-11-17 16:14:26,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425300053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:26,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648189484] [2023-11-17 16:14:26,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:14:26,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:26,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:26,548 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 16:14:26,550 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 16:14:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:26,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:14:26,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:26,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:26,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648189484] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:26,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:26,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-17 16:14:26,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311302720] [2023-11-17 16:14:26,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:26,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:14:26,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:26,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:14:26,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:14:26,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:26,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 1077 transitions, 25722 flow. Second operand has 17 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:26,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:26,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:26,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:28,562 INFO L124 PetriNetUnfolderBase]: 2496/4434 cut-off events. [2023-11-17 16:14:28,562 INFO L125 PetriNetUnfolderBase]: For 136231/136231 co-relation queries the response was YES. [2023-11-17 16:14:28,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48403 conditions, 4434 events. 2496/4434 cut-off events. For 136231/136231 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 29918 event pairs, 706 based on Foata normal form. 6/4440 useless extension candidates. Maximal degree in co-relation 47807. Up to 4069 conditions per place. [2023-11-17 16:14:28,619 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 975 selfloop transitions, 135 changer transitions 5/1115 dead transitions. [2023-11-17 16:14:28,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1115 transitions, 28549 flow [2023-11-17 16:14:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:14:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:14:28,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 934 transitions. [2023-11-17 16:14:28,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42922794117647056 [2023-11-17 16:14:28,621 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 934 transitions. [2023-11-17 16:14:28,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 934 transitions. [2023-11-17 16:14:28,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:28,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 934 transitions. [2023-11-17 16:14:28,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.375) internal successors, (934), 16 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:28,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:28,625 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:28,626 INFO L175 Difference]: Start difference. First operand has 346 places, 1077 transitions, 25722 flow. Second operand 16 states and 934 transitions. [2023-11-17 16:14:28,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1115 transitions, 28549 flow [2023-11-17 16:14:29,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1115 transitions, 26974 flow, removed 764 selfloop flow, removed 6 redundant places. [2023-11-17 16:14:29,913 INFO L231 Difference]: Finished difference. Result has 355 places, 1090 transitions, 24844 flow [2023-11-17 16:14:29,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=24271, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=24844, PETRI_PLACES=355, PETRI_TRANSITIONS=1090} [2023-11-17 16:14:29,915 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 335 predicate places. [2023-11-17 16:14:29,915 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 1090 transitions, 24844 flow [2023-11-17 16:14:29,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:29,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:29,915 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:29,920 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 16:14:30,115 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 16:14:30,116 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 16:14:30,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash 597072806, now seen corresponding path program 20 times [2023-11-17 16:14:30,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:30,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144315218] [2023-11-17 16:14:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:30,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:30,195 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 16:14:30,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:30,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144315218] [2023-11-17 16:14:30,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144315218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:30,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131520499] [2023-11-17 16:14:30,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:14:30,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:30,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:30,197 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 16:14:30,217 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 16:14:30,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:14:30,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:30,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 16:14:30,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:30,292 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 16:14:30,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:30,361 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 16:14:30,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131520499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:30,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:30,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-17 16:14:30,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711956454] [2023-11-17 16:14:30,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:30,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:14:30,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:30,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:14:30,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:14:30,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 136 [2023-11-17 16:14:30,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 1090 transitions, 24844 flow. Second operand has 6 states, 6 states have (on average 69.16666666666667) internal successors, (415), 6 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:30,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:30,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 136 [2023-11-17 16:14:30,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:32,328 INFO L124 PetriNetUnfolderBase]: 3371/5946 cut-off events. [2023-11-17 16:14:32,328 INFO L125 PetriNetUnfolderBase]: For 152877/152877 co-relation queries the response was YES. [2023-11-17 16:14:32,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61762 conditions, 5946 events. 3371/5946 cut-off events. For 152877/152877 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 42099 event pairs, 139 based on Foata normal form. 7/5953 useless extension candidates. Maximal degree in co-relation 60582. Up to 3556 conditions per place. [2023-11-17 16:14:32,425 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 1003 selfloop transitions, 448 changer transitions 134/1585 dead transitions. [2023-11-17 16:14:32,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1585 transitions, 38587 flow [2023-11-17 16:14:32,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:14:32,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:14:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 459 transitions. [2023-11-17 16:14:32,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-11-17 16:14:32,426 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 459 transitions. [2023-11-17 16:14:32,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 459 transitions. [2023-11-17 16:14:32,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:32,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 459 transitions. [2023-11-17 16:14:32,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 76.5) internal successors, (459), 6 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:32,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:32,428 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:32,428 INFO L175 Difference]: Start difference. First operand has 355 places, 1090 transitions, 24844 flow. Second operand 6 states and 459 transitions. [2023-11-17 16:14:32,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1585 transitions, 38587 flow [2023-11-17 16:14:34,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 1585 transitions, 38259 flow, removed 70 selfloop flow, removed 9 redundant places. [2023-11-17 16:14:34,226 INFO L231 Difference]: Finished difference. Result has 354 places, 1320 transitions, 30688 flow [2023-11-17 16:14:34,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=24644, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=30688, PETRI_PLACES=354, PETRI_TRANSITIONS=1320} [2023-11-17 16:14:34,228 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 334 predicate places. [2023-11-17 16:14:34,228 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 1320 transitions, 30688 flow [2023-11-17 16:14:34,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 69.16666666666667) internal successors, (415), 6 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:34,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:34,229 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:34,237 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 16:14:34,433 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 16:14:34,434 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 16:14:34,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:34,434 INFO L85 PathProgramCache]: Analyzing trace with hash -672025730, now seen corresponding path program 21 times [2023-11-17 16:14:34,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:34,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983499933] [2023-11-17 16:14:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:34,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:34,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:34,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983499933] [2023-11-17 16:14:34,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983499933] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:34,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457109454] [2023-11-17 16:14:34,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:14:34,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:34,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:34,541 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 16:14:34,555 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 16:14:34,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 16:14:34,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:34,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:14:34,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:34,693 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 16:14:34,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:34,751 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 16:14:34,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457109454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:34,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:34,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-17 16:14:34,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785077139] [2023-11-17 16:14:34,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:34,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:14:34,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:34,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:14:34,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:14:34,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:34,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1320 transitions, 30688 flow. Second operand has 17 states, 17 states have (on average 55.88235294117647) internal successors, (950), 17 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:34,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:34,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:34,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:37,628 INFO L124 PetriNetUnfolderBase]: 4014/7171 cut-off events. [2023-11-17 16:14:37,629 INFO L125 PetriNetUnfolderBase]: For 201093/201093 co-relation queries the response was YES. [2023-11-17 16:14:37,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78874 conditions, 7171 events. 4014/7171 cut-off events. For 201093/201093 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 52814 event pairs, 153 based on Foata normal form. 16/7187 useless extension candidates. Maximal degree in co-relation 77508. Up to 3288 conditions per place. [2023-11-17 16:14:37,729 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 1092 selfloop transitions, 639 changer transitions 33/1764 dead transitions. [2023-11-17 16:14:37,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1764 transitions, 44814 flow [2023-11-17 16:14:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:14:37,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:14:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 953 transitions. [2023-11-17 16:14:37,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43795955882352944 [2023-11-17 16:14:37,730 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 953 transitions. [2023-11-17 16:14:37,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 953 transitions. [2023-11-17 16:14:37,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:37,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 953 transitions. [2023-11-17 16:14:37,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.5625) internal successors, (953), 16 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:37,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:37,733 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:37,733 INFO L175 Difference]: Start difference. First operand has 354 places, 1320 transitions, 30688 flow. Second operand 16 states and 953 transitions. [2023-11-17 16:14:37,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1764 transitions, 44814 flow [2023-11-17 16:14:40,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1764 transitions, 44336 flow, removed 239 selfloop flow, removed 0 redundant places. [2023-11-17 16:14:40,549 INFO L231 Difference]: Finished difference. Result has 379 places, 1631 transitions, 41256 flow [2023-11-17 16:14:40,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=30264, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=41256, PETRI_PLACES=379, PETRI_TRANSITIONS=1631} [2023-11-17 16:14:40,550 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 359 predicate places. [2023-11-17 16:14:40,550 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 1631 transitions, 41256 flow [2023-11-17 16:14:40,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.88235294117647) internal successors, (950), 17 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:40,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:40,551 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:40,556 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 16:14:40,755 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 16:14:40,755 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 16:14:40,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:40,756 INFO L85 PathProgramCache]: Analyzing trace with hash -902255122, now seen corresponding path program 22 times [2023-11-17 16:14:40,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:40,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655022468] [2023-11-17 16:14:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:40,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:40,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:40,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655022468] [2023-11-17 16:14:40,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655022468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:40,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948639606] [2023-11-17 16:14:40,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:14:40,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:40,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:40,875 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 16:14:40,879 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 16:14:40,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:14:40,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:40,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:14:40,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:41,010 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 16:14:41,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:41,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948639606] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:41,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:41,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-11-17 16:14:41,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975664784] [2023-11-17 16:14:41,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:41,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:14:41,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:41,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:14:41,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:14:41,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:41,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1631 transitions, 41256 flow. Second operand has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:41,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:41,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:41,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:45,015 INFO L124 PetriNetUnfolderBase]: 4415/7816 cut-off events. [2023-11-17 16:14:45,015 INFO L125 PetriNetUnfolderBase]: For 249555/249555 co-relation queries the response was YES. [2023-11-17 16:14:45,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90158 conditions, 7816 events. 4415/7816 cut-off events. For 249555/249555 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 58017 event pairs, 442 based on Foata normal form. 22/7838 useless extension candidates. Maximal degree in co-relation 88867. Up to 3120 conditions per place. [2023-11-17 16:14:45,113 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 1083 selfloop transitions, 827 changer transitions 2/1912 dead transitions. [2023-11-17 16:14:45,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 1912 transitions, 51351 flow [2023-11-17 16:14:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:14:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:14:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1411 transitions. [2023-11-17 16:14:45,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4322916666666667 [2023-11-17 16:14:45,115 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1411 transitions. [2023-11-17 16:14:45,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1411 transitions. [2023-11-17 16:14:45,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:45,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1411 transitions. [2023-11-17 16:14:45,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 58.791666666666664) internal successors, (1411), 24 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:45,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 136.0) internal successors, (3400), 25 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:45,120 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 136.0) internal successors, (3400), 25 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:45,120 INFO L175 Difference]: Start difference. First operand has 379 places, 1631 transitions, 41256 flow. Second operand 24 states and 1411 transitions. [2023-11-17 16:14:45,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 1912 transitions, 51351 flow [2023-11-17 16:14:48,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 1912 transitions, 50990 flow, removed 172 selfloop flow, removed 3 redundant places. [2023-11-17 16:14:48,136 INFO L231 Difference]: Finished difference. Result has 407 places, 1802 transitions, 48114 flow [2023-11-17 16:14:48,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=40959, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=673, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=48114, PETRI_PLACES=407, PETRI_TRANSITIONS=1802} [2023-11-17 16:14:48,138 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 387 predicate places. [2023-11-17 16:14:48,138 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1802 transitions, 48114 flow [2023-11-17 16:14:48,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:48,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:48,138 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:48,145 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 16:14:48,340 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 16:14:48,341 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 16:14:48,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:48,341 INFO L85 PathProgramCache]: Analyzing trace with hash -790202922, now seen corresponding path program 23 times [2023-11-17 16:14:48,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:48,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126791357] [2023-11-17 16:14:48,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:48,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:48,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:48,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126791357] [2023-11-17 16:14:48,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126791357] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:48,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100150221] [2023-11-17 16:14:48,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:14:48,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:48,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:48,453 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 16:14:48,477 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 16:14:48,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-17 16:14:48,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:48,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:14:48,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:48,600 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 16:14:48,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:48,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100150221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:48,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:48,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-17 16:14:48,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485100202] [2023-11-17 16:14:48,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:48,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:14:48,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:48,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:14:48,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:14:48,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:48,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1802 transitions, 48114 flow. Second operand has 18 states, 18 states have (on average 55.666666666666664) internal successors, (1002), 18 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:48,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:48,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:48,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:53,341 INFO L124 PetriNetUnfolderBase]: 4651/8160 cut-off events. [2023-11-17 16:14:53,341 INFO L125 PetriNetUnfolderBase]: For 300173/300173 co-relation queries the response was YES. [2023-11-17 16:14:53,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98740 conditions, 8160 events. 4651/8160 cut-off events. For 300173/300173 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 60612 event pairs, 742 based on Foata normal form. 22/8182 useless extension candidates. Maximal degree in co-relation 97327. Up to 4670 conditions per place. [2023-11-17 16:14:53,544 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 716 selfloop transitions, 1278 changer transitions 33/2027 dead transitions. [2023-11-17 16:14:53,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 2027 transitions, 57724 flow [2023-11-17 16:14:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:14:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:14:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1691 transitions. [2023-11-17 16:14:53,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4287525354969574 [2023-11-17 16:14:53,546 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1691 transitions. [2023-11-17 16:14:53,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1691 transitions. [2023-11-17 16:14:53,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:53,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1691 transitions. [2023-11-17 16:14:53,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 58.310344827586206) internal successors, (1691), 29 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:53,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 136.0) internal successors, (4080), 30 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:53,552 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 136.0) internal successors, (4080), 30 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:53,552 INFO L175 Difference]: Start difference. First operand has 407 places, 1802 transitions, 48114 flow. Second operand 29 states and 1691 transitions. [2023-11-17 16:14:53,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 2027 transitions, 57724 flow [2023-11-17 16:14:56,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 2027 transitions, 56923 flow, removed 364 selfloop flow, removed 5 redundant places. [2023-11-17 16:14:56,768 INFO L231 Difference]: Finished difference. Result has 433 places, 1940 transitions, 54074 flow [2023-11-17 16:14:56,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=47379, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=54074, PETRI_PLACES=433, PETRI_TRANSITIONS=1940} [2023-11-17 16:14:56,769 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 413 predicate places. [2023-11-17 16:14:56,770 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 1940 transitions, 54074 flow [2023-11-17 16:14:56,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.666666666666664) internal successors, (1002), 18 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:56,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:56,770 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:56,777 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 16:14:56,974 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 16:14:56,975 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 16:14:56,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:56,975 INFO L85 PathProgramCache]: Analyzing trace with hash -302422706, now seen corresponding path program 24 times [2023-11-17 16:14:56,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:56,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689136271] [2023-11-17 16:14:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:56,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:57,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:57,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689136271] [2023-11-17 16:14:57,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689136271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:57,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141725060] [2023-11-17 16:14:57,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:14:57,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:57,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:57,073 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 16:14:57,104 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 16:14:57,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:14:57,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:57,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:14:57,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:57,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:57,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141725060] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:57,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:57,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-17 16:14:57,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871027162] [2023-11-17 16:14:57,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:57,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:14:57,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:57,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:14:57,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:14:57,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:14:57,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1940 transitions, 54074 flow. Second operand has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:57,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:57,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:14:57,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:15:02,258 INFO L124 PetriNetUnfolderBase]: 4965/8690 cut-off events. [2023-11-17 16:15:02,258 INFO L125 PetriNetUnfolderBase]: For 313877/313877 co-relation queries the response was YES. [2023-11-17 16:15:02,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107358 conditions, 8690 events. 4965/8690 cut-off events. For 313877/313877 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 64120 event pairs, 306 based on Foata normal form. 26/8716 useless extension candidates. Maximal degree in co-relation 105961. Up to 2442 conditions per place. [2023-11-17 16:15:02,378 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 967 selfloop transitions, 1198 changer transitions 23/2188 dead transitions. [2023-11-17 16:15:02,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 2188 transitions, 63877 flow [2023-11-17 16:15:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 16:15:02,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 16:15:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1757 transitions. [2023-11-17 16:15:02,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306372549019608 [2023-11-17 16:15:02,381 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1757 transitions. [2023-11-17 16:15:02,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1757 transitions. [2023-11-17 16:15:02,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:15:02,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1757 transitions. [2023-11-17 16:15:02,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.56666666666667) internal successors, (1757), 30 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:02,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 136.0) internal successors, (4216), 31 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:02,387 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 136.0) internal successors, (4216), 31 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:02,387 INFO L175 Difference]: Start difference. First operand has 433 places, 1940 transitions, 54074 flow. Second operand 30 states and 1757 transitions. [2023-11-17 16:15:02,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 2188 transitions, 63877 flow [2023-11-17 16:15:07,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 2188 transitions, 59331 flow, removed 1163 selfloop flow, removed 19 redundant places. [2023-11-17 16:15:07,151 INFO L231 Difference]: Finished difference. Result has 452 places, 2061 transitions, 56896 flow [2023-11-17 16:15:07,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=50051, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1069, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=56896, PETRI_PLACES=452, PETRI_TRANSITIONS=2061} [2023-11-17 16:15:07,153 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 432 predicate places. [2023-11-17 16:15:07,154 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 2061 transitions, 56896 flow [2023-11-17 16:15:07,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:07,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:15:07,154 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:15:07,163 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 16:15:07,359 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 16:15:07,360 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 16:15:07,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:15:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1886321196, now seen corresponding path program 25 times [2023-11-17 16:15:07,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:15:07,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953346424] [2023-11-17 16:15:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:15:07,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:15:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:07,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:15:07,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953346424] [2023-11-17 16:15:07,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953346424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:15:07,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416639774] [2023-11-17 16:15:07,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:15:07,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:15:07,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:15:07,471 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 16:15:07,487 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 16:15:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:07,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:15:07,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:15:07,626 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 16:15:07,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:15:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:07,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416639774] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:15:07,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:15:07,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-17 16:15:07,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381831039] [2023-11-17 16:15:07,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:15:07,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:15:07,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:15:07,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:15:07,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:15:07,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:15:07,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 2061 transitions, 56896 flow. Second operand has 18 states, 18 states have (on average 55.666666666666664) internal successors, (1002), 18 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:07,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:15:07,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:15:07,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:15:13,793 INFO L124 PetriNetUnfolderBase]: 5291/9266 cut-off events. [2023-11-17 16:15:13,793 INFO L125 PetriNetUnfolderBase]: For 311888/311888 co-relation queries the response was YES. [2023-11-17 16:15:13,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111180 conditions, 9266 events. 5291/9266 cut-off events. For 311888/311888 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 69296 event pairs, 230 based on Foata normal form. 66/9332 useless extension candidates. Maximal degree in co-relation 109985. Up to 2639 conditions per place. [2023-11-17 16:15:14,105 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 706 selfloop transitions, 1590 changer transitions 16/2312 dead transitions. [2023-11-17 16:15:14,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 2312 transitions, 66501 flow [2023-11-17 16:15:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 16:15:14,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 16:15:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2049 transitions. [2023-11-17 16:15:14,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4304621848739496 [2023-11-17 16:15:14,108 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2049 transitions. [2023-11-17 16:15:14,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2049 transitions. [2023-11-17 16:15:14,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:15:14,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2049 transitions. [2023-11-17 16:15:14,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 58.542857142857144) internal successors, (2049), 35 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:14,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 136.0) internal successors, (4896), 36 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:14,114 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 136.0) internal successors, (4896), 36 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:14,114 INFO L175 Difference]: Start difference. First operand has 452 places, 2061 transitions, 56896 flow. Second operand 35 states and 2049 transitions. [2023-11-17 16:15:14,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 2312 transitions, 66501 flow [2023-11-17 16:15:19,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 2312 transitions, 65322 flow, removed 472 selfloop flow, removed 12 redundant places. [2023-11-17 16:15:19,133 INFO L231 Difference]: Finished difference. Result has 486 places, 2213 transitions, 64953 flow [2023-11-17 16:15:19,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=55719, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2057, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=64953, PETRI_PLACES=486, PETRI_TRANSITIONS=2213} [2023-11-17 16:15:19,135 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 466 predicate places. [2023-11-17 16:15:19,136 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 2213 transitions, 64953 flow [2023-11-17 16:15:19,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.666666666666664) internal successors, (1002), 18 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:19,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:15:19,136 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:15:19,143 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 16:15:19,336 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 16:15:19,337 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:15:19,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:15:19,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1663943602, now seen corresponding path program 26 times [2023-11-17 16:15:19,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:15:19,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637962210] [2023-11-17 16:15:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:15:19,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:15:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:19,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:15:19,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637962210] [2023-11-17 16:15:19,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637962210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:15:19,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511857661] [2023-11-17 16:15:19,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:15:19,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:15:19,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:15:19,435 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:15:19,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 16:15:19,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:15:19,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:15:19,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:15:19,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:15:19,573 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 16:15:19,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:15:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:19,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511857661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:15:19,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:15:19,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-17 16:15:19,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248262051] [2023-11-17 16:15:19,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:15:19,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:15:19,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:15:19,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:15:19,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:15:19,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:15:19,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 2213 transitions, 64953 flow. Second operand has 18 states, 18 states have (on average 55.666666666666664) internal successors, (1002), 18 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:19,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:15:19,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:15:19,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:15:26,678 INFO L124 PetriNetUnfolderBase]: 5366/9491 cut-off events. [2023-11-17 16:15:26,678 INFO L125 PetriNetUnfolderBase]: For 370807/370807 co-relation queries the response was YES. [2023-11-17 16:15:26,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118464 conditions, 9491 events. 5366/9491 cut-off events. For 370807/370807 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 72541 event pairs, 335 based on Foata normal form. 52/9543 useless extension candidates. Maximal degree in co-relation 117185. Up to 3513 conditions per place. [2023-11-17 16:15:26,817 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 467 selfloop transitions, 1858 changer transitions 1/2326 dead transitions. [2023-11-17 16:15:26,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 2326 transitions, 71348 flow [2023-11-17 16:15:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 16:15:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 16:15:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2159 transitions. [2023-11-17 16:15:26,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42905405405405406 [2023-11-17 16:15:26,820 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2159 transitions. [2023-11-17 16:15:26,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2159 transitions. [2023-11-17 16:15:26,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:15:26,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2159 transitions. [2023-11-17 16:15:26,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 58.351351351351354) internal successors, (2159), 37 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:26,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 136.0) internal successors, (5168), 38 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:26,827 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 136.0) internal successors, (5168), 38 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:26,827 INFO L175 Difference]: Start difference. First operand has 486 places, 2213 transitions, 64953 flow. Second operand 37 states and 2159 transitions. [2023-11-17 16:15:26,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 2326 transitions, 71348 flow [2023-11-17 16:15:33,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 2326 transitions, 70077 flow, removed 320 selfloop flow, removed 19 redundant places. [2023-11-17 16:15:33,352 INFO L231 Difference]: Finished difference. Result has 504 places, 2258 transitions, 69475 flow [2023-11-17 16:15:33,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=63677, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1810, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=69475, PETRI_PLACES=504, PETRI_TRANSITIONS=2258} [2023-11-17 16:15:33,354 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 484 predicate places. [2023-11-17 16:15:33,354 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 2258 transitions, 69475 flow [2023-11-17 16:15:33,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.666666666666664) internal successors, (1002), 18 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:33,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:15:33,354 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:15:33,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-17 16:15:33,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:15:33,556 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:15:33,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:15:33,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1986739626, now seen corresponding path program 27 times [2023-11-17 16:15:33,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:15:33,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012002719] [2023-11-17 16:15:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:15:33,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:15:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:33,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:15:33,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012002719] [2023-11-17 16:15:33,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012002719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:15:33,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823653130] [2023-11-17 16:15:33,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:15:33,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:15:33,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:15:33,661 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:15:33,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 16:15:33,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:15:33,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:15:33,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:15:33,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:15:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:33,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:15:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:33,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823653130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:15:33,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:15:33,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-11-17 16:15:33,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306211584] [2023-11-17 16:15:33,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:15:33,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:15:33,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:15:33,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:15:33,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:15:33,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:15:33,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 2258 transitions, 69475 flow. Second operand has 21 states, 21 states have (on average 55.80952380952381) internal successors, (1172), 21 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:33,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:15:33,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:15:33,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:15:41,000 INFO L124 PetriNetUnfolderBase]: 6009/10640 cut-off events. [2023-11-17 16:15:41,000 INFO L125 PetriNetUnfolderBase]: For 408103/408103 co-relation queries the response was YES. [2023-11-17 16:15:41,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138683 conditions, 10640 events. 6009/10640 cut-off events. For 408103/408103 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 82896 event pairs, 467 based on Foata normal form. 12/10652 useless extension candidates. Maximal degree in co-relation 137393. Up to 3469 conditions per place. [2023-11-17 16:15:41,149 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 1303 selfloop transitions, 1341 changer transitions 0/2644 dead transitions. [2023-11-17 16:15:41,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 2644 transitions, 85133 flow [2023-11-17 16:15:41,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-17 16:15:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-17 16:15:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2452 transitions. [2023-11-17 16:15:41,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42927170868347336 [2023-11-17 16:15:41,152 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2452 transitions. [2023-11-17 16:15:41,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2452 transitions. [2023-11-17 16:15:41,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:15:41,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2452 transitions. [2023-11-17 16:15:41,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 58.38095238095238) internal successors, (2452), 42 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:41,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 136.0) internal successors, (5848), 43 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:41,158 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 136.0) internal successors, (5848), 43 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:41,158 INFO L175 Difference]: Start difference. First operand has 504 places, 2258 transitions, 69475 flow. Second operand 42 states and 2452 transitions. [2023-11-17 16:15:41,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 2644 transitions, 85133 flow [2023-11-17 16:15:48,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 2644 transitions, 82057 flow, removed 147 selfloop flow, removed 28 redundant places. [2023-11-17 16:15:48,657 INFO L231 Difference]: Finished difference. Result has 523 places, 2505 transitions, 78403 flow [2023-11-17 16:15:48,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=66783, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1095, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=78403, PETRI_PLACES=523, PETRI_TRANSITIONS=2505} [2023-11-17 16:15:48,659 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 503 predicate places. [2023-11-17 16:15:48,659 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 2505 transitions, 78403 flow [2023-11-17 16:15:48,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.80952380952381) internal successors, (1172), 21 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:48,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:15:48,659 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:15:48,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-17 16:15:48,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-17 16:15:48,860 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:15:48,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:15:48,860 INFO L85 PathProgramCache]: Analyzing trace with hash -336268572, now seen corresponding path program 28 times [2023-11-17 16:15:48,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:15:48,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88255930] [2023-11-17 16:15:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:15:48,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:15:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:48,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:15:48,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88255930] [2023-11-17 16:15:48,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88255930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:15:48,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003202736] [2023-11-17 16:15:48,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:15:48,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:15:48,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:15:48,965 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:15:48,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 16:15:49,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:15:49,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:15:49,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:15:49,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:15:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:49,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:15:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:49,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003202736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:15:49,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:15:49,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2023-11-17 16:15:49,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713354397] [2023-11-17 16:15:49,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:15:49,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:15:49,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:15:49,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:15:49,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:15:49,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:15:49,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 2505 transitions, 78403 flow. Second operand has 18 states, 18 states have (on average 55.94444444444444) internal successors, (1007), 18 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:49,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:15:49,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:15:49,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:15:59,071 INFO L124 PetriNetUnfolderBase]: 6532/11621 cut-off events. [2023-11-17 16:15:59,071 INFO L125 PetriNetUnfolderBase]: For 469332/469332 co-relation queries the response was YES. [2023-11-17 16:15:59,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152942 conditions, 11621 events. 6532/11621 cut-off events. For 469332/469332 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 92211 event pairs, 166 based on Foata normal form. 68/11689 useless extension candidates. Maximal degree in co-relation 151911. Up to 2887 conditions per place. [2023-11-17 16:15:59,390 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 464 selfloop transitions, 2323 changer transitions 26/2813 dead transitions. [2023-11-17 16:15:59,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 2813 transitions, 91702 flow [2023-11-17 16:15:59,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 16:15:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 16:15:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1868 transitions. [2023-11-17 16:15:59,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42922794117647056 [2023-11-17 16:15:59,392 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1868 transitions. [2023-11-17 16:15:59,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1868 transitions. [2023-11-17 16:15:59,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:15:59,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1868 transitions. [2023-11-17 16:15:59,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 58.375) internal successors, (1868), 32 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:59,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 136.0) internal successors, (4488), 33 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:59,397 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 136.0) internal successors, (4488), 33 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:59,398 INFO L175 Difference]: Start difference. First operand has 523 places, 2505 transitions, 78403 flow. Second operand 32 states and 1868 transitions. [2023-11-17 16:15:59,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 2813 transitions, 91702 flow [2023-11-17 16:16:07,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 2813 transitions, 90202 flow, removed 442 selfloop flow, removed 11 redundant places. [2023-11-17 16:16:07,611 INFO L231 Difference]: Finished difference. Result has 548 places, 2706 transitions, 89990 flow [2023-11-17 16:16:07,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=76872, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=89990, PETRI_PLACES=548, PETRI_TRANSITIONS=2706} [2023-11-17 16:16:07,613 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 528 predicate places. [2023-11-17 16:16:07,613 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 2706 transitions, 89990 flow [2023-11-17 16:16:07,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.94444444444444) internal successors, (1007), 18 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:07,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:16:07,613 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:16:07,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-17 16:16:07,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:16:07,814 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:16:07,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:16:07,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1082914014, now seen corresponding path program 29 times [2023-11-17 16:16:07,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:16:07,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795739859] [2023-11-17 16:16:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:16:07,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:16:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:16:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:16:07,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:16:07,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795739859] [2023-11-17 16:16:07,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795739859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:16:07,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752402821] [2023-11-17 16:16:07,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:16:07,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:16:07,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:16:07,906 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:16:07,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 16:16:07,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:16:07,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:16:07,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:16:07,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:16:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:16:08,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:16:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:16:08,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752402821] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:16:08,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:16:08,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2023-11-17 16:16:08,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906163266] [2023-11-17 16:16:08,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:16:08,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:16:08,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:16:08,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:16:08,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:16:08,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:16:08,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 2706 transitions, 89990 flow. Second operand has 18 states, 18 states have (on average 55.94444444444444) internal successors, (1007), 18 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:08,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:16:08,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:16:08,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:16:17,821 INFO L124 PetriNetUnfolderBase]: 6772/12039 cut-off events. [2023-11-17 16:16:17,822 INFO L125 PetriNetUnfolderBase]: For 532354/532354 co-relation queries the response was YES. [2023-11-17 16:16:17,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166865 conditions, 12039 events. 6772/12039 cut-off events. For 532354/532354 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 96178 event pairs, 339 based on Foata normal form. 22/12061 useless extension candidates. Maximal degree in co-relation 165735. Up to 3109 conditions per place. [2023-11-17 16:16:18,011 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 1024 selfloop transitions, 1889 changer transitions 12/2925 dead transitions. [2023-11-17 16:16:18,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 2925 transitions, 101322 flow [2023-11-17 16:16:18,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 16:16:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 16:16:18,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1986 transitions. [2023-11-17 16:16:18,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4294982698961938 [2023-11-17 16:16:18,014 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1986 transitions. [2023-11-17 16:16:18,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1986 transitions. [2023-11-17 16:16:18,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:16:18,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1986 transitions. [2023-11-17 16:16:18,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 58.411764705882355) internal successors, (1986), 34 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:18,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 136.0) internal successors, (4760), 35 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:18,018 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 136.0) internal successors, (4760), 35 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:18,018 INFO L175 Difference]: Start difference. First operand has 548 places, 2706 transitions, 89990 flow. Second operand 34 states and 1986 transitions. [2023-11-17 16:16:18,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 2925 transitions, 101322 flow [2023-11-17 16:16:30,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 2925 transitions, 99747 flow, removed 523 selfloop flow, removed 13 redundant places. [2023-11-17 16:16:30,186 INFO L231 Difference]: Finished difference. Result has 578 places, 2819 transitions, 97882 flow [2023-11-17 16:16:30,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=88511, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1769, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=884, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=97882, PETRI_PLACES=578, PETRI_TRANSITIONS=2819} [2023-11-17 16:16:30,190 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 558 predicate places. [2023-11-17 16:16:30,190 INFO L495 AbstractCegarLoop]: Abstraction has has 578 places, 2819 transitions, 97882 flow [2023-11-17 16:16:30,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.94444444444444) internal successors, (1007), 18 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:30,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:16:30,190 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:16:30,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-17 16:16:30,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:16:30,395 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:16:30,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:16:30,396 INFO L85 PathProgramCache]: Analyzing trace with hash -214671822, now seen corresponding path program 30 times [2023-11-17 16:16:30,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:16:30,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105234787] [2023-11-17 16:16:30,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:16:30,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:16:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:16:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:16:30,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:16:30,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105234787] [2023-11-17 16:16:30,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105234787] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:16:30,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146923622] [2023-11-17 16:16:30,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:16:30,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:16:30,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:16:30,497 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:16:30,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 16:16:30,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:16:30,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:16:30,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:16:30,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:16:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:16:30,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:16:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:16:30,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146923622] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:16:30,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:16:30,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-17 16:16:30,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845528416] [2023-11-17 16:16:30,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:16:30,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 16:16:30,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:16:30,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 16:16:30,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-11-17 16:16:30,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:16:30,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 2819 transitions, 97882 flow. Second operand has 23 states, 23 states have (on average 55.73913043478261) internal successors, (1282), 23 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:30,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:16:30,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:16:30,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:16:43,658 INFO L124 PetriNetUnfolderBase]: 7738/13799 cut-off events. [2023-11-17 16:16:43,658 INFO L125 PetriNetUnfolderBase]: For 671929/671929 co-relation queries the response was YES. [2023-11-17 16:16:43,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198622 conditions, 13799 events. 7738/13799 cut-off events. For 671929/671929 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 113027 event pairs, 538 based on Foata normal form. 22/13821 useless extension candidates. Maximal degree in co-relation 197543. Up to 3722 conditions per place. [2023-11-17 16:16:44,050 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 1292 selfloop transitions, 2023 changer transitions 17/3332 dead transitions. [2023-11-17 16:16:44,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 3332 transitions, 121020 flow [2023-11-17 16:16:44,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 16:16:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 16:16:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2568 transitions. [2023-11-17 16:16:44,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42914438502673796 [2023-11-17 16:16:44,053 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2568 transitions. [2023-11-17 16:16:44,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2568 transitions. [2023-11-17 16:16:44,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:16:44,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2568 transitions. [2023-11-17 16:16:44,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 58.36363636363637) internal successors, (2568), 44 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:44,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 136.0) internal successors, (6120), 45 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:44,060 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 136.0) internal successors, (6120), 45 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:44,060 INFO L175 Difference]: Start difference. First operand has 578 places, 2819 transitions, 97882 flow. Second operand 44 states and 2568 transitions. [2023-11-17 16:16:44,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 3332 transitions, 121020 flow [2023-11-17 16:17:03,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 3332 transitions, 120054 flow, removed 355 selfloop flow, removed 12 redundant places. [2023-11-17 16:17:03,566 INFO L231 Difference]: Finished difference. Result has 616 places, 3216 transitions, 117008 flow [2023-11-17 16:17:03,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=97055, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=117008, PETRI_PLACES=616, PETRI_TRANSITIONS=3216} [2023-11-17 16:17:03,570 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 596 predicate places. [2023-11-17 16:17:03,570 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 3216 transitions, 117008 flow [2023-11-17 16:17:03,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 55.73913043478261) internal successors, (1282), 23 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:17:03,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:17:03,570 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:17:03,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-17 16:17:03,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-17 16:17:03,775 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:17:03,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:17:03,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1721589746, now seen corresponding path program 31 times [2023-11-17 16:17:03,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:17:03,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330070343] [2023-11-17 16:17:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:17:03,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:17:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:17:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:17:03,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:17:03,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330070343] [2023-11-17 16:17:03,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330070343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:17:03,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712143270] [2023-11-17 16:17:03,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:17:03,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:17:03,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:17:03,865 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:17:03,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 16:17:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:17:03,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:17:03,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:17:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:17:04,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:17:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:17:04,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712143270] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:17:04,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:17:04,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2023-11-17 16:17:04,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329785826] [2023-11-17 16:17:04,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:17:04,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:17:04,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:17:04,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:17:04,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:17:04,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:17:04,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 3216 transitions, 117008 flow. Second operand has 19 states, 19 states have (on average 55.89473684210526) internal successors, (1062), 19 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:17:04,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:17:04,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:17:04,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:17:22,663 INFO L124 PetriNetUnfolderBase]: 9193/16394 cut-off events. [2023-11-17 16:17:22,663 INFO L125 PetriNetUnfolderBase]: For 839826/839826 co-relation queries the response was YES. [2023-11-17 16:17:22,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241196 conditions, 16394 events. 9193/16394 cut-off events. For 839826/839826 co-relation queries the response was YES. Maximal size of possible extension queue 1210. Compared 137630 event pairs, 264 based on Foata normal form. 74/16468 useless extension candidates. Maximal degree in co-relation 239889. Up to 4229 conditions per place. [2023-11-17 16:17:23,093 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 633 selfloop transitions, 3314 changer transitions 36/3983 dead transitions. [2023-11-17 16:17:23,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 3983 transitions, 148835 flow [2023-11-17 16:17:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 16:17:23,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 16:17:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2334 transitions. [2023-11-17 16:17:23,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290441176470588 [2023-11-17 16:17:23,096 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2334 transitions. [2023-11-17 16:17:23,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2334 transitions. [2023-11-17 16:17:23,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:17:23,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2334 transitions. [2023-11-17 16:17:23,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 58.35) internal successors, (2334), 40 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:17:23,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 136.0) internal successors, (5576), 41 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:17:23,101 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 136.0) internal successors, (5576), 41 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:17:23,101 INFO L175 Difference]: Start difference. First operand has 616 places, 3216 transitions, 117008 flow. Second operand 40 states and 2334 transitions. [2023-11-17 16:17:23,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 3983 transitions, 148835 flow [2023-11-17 16:17:49,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 3983 transitions, 147614 flow, removed 533 selfloop flow, removed 6 redundant places. [2023-11-17 16:17:49,761 INFO L231 Difference]: Finished difference. Result has 661 places, 3873 transitions, 148430 flow [2023-11-17 16:17:49,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=115963, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2706, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=148430, PETRI_PLACES=661, PETRI_TRANSITIONS=3873} [2023-11-17 16:17:49,764 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 641 predicate places. [2023-11-17 16:17:49,764 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 3873 transitions, 148430 flow [2023-11-17 16:17:49,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.89473684210526) internal successors, (1062), 19 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:17:49,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:17:49,765 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:17:49,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-17 16:17:49,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-17 16:17:49,965 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:17:49,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:17:49,966 INFO L85 PathProgramCache]: Analyzing trace with hash 327796586, now seen corresponding path program 32 times [2023-11-17 16:17:49,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:17:49,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528053951] [2023-11-17 16:17:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:17:49,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:17:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:17:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:17:50,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:17:50,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528053951] [2023-11-17 16:17:50,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528053951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:17:50,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659949314] [2023-11-17 16:17:50,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:17:50,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:17:50,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:17:50,060 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:17:50,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 16:17:50,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:17:50,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:17:50,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:17:50,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:17:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:17:50,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:17:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:17:50,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659949314] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:17:50,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:17:50,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-11-17 16:17:50,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118422292] [2023-11-17 16:17:50,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:17:50,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:17:50,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:17:50,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:17:50,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:17:50,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:17:50,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 3873 transitions, 148430 flow. Second operand has 25 states, 25 states have (on average 55.64) internal successors, (1391), 25 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:17:50,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:17:50,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:17:50,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:24,929 INFO L124 PetriNetUnfolderBase]: 12707/22676 cut-off events. [2023-11-17 16:18:24,930 INFO L125 PetriNetUnfolderBase]: For 1381243/1381243 co-relation queries the response was YES. [2023-11-17 16:18:25,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358439 conditions, 22676 events. 12707/22676 cut-off events. For 1381243/1381243 co-relation queries the response was YES. Maximal size of possible extension queue 1576. Compared 200190 event pairs, 734 based on Foata normal form. 50/22726 useless extension candidates. Maximal degree in co-relation 356987. Up to 5821 conditions per place. [2023-11-17 16:18:25,650 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 1493 selfloop transitions, 3974 changer transitions 53/5520 dead transitions. [2023-11-17 16:18:25,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 712 places, 5520 transitions, 225721 flow [2023-11-17 16:18:25,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-17 16:18:25,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-17 16:18:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3031 transitions. [2023-11-17 16:18:25,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428591628959276 [2023-11-17 16:18:25,654 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3031 transitions. [2023-11-17 16:18:25,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3031 transitions. [2023-11-17 16:18:25,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:25,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3031 transitions. [2023-11-17 16:18:25,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 58.28846153846154) internal successors, (3031), 52 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:18:25,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 136.0) internal successors, (7208), 53 states have internal predecessors, (7208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:18:25,661 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 136.0) internal successors, (7208), 53 states have internal predecessors, (7208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:18:25,661 INFO L175 Difference]: Start difference. First operand has 661 places, 3873 transitions, 148430 flow. Second operand 52 states and 3031 transitions. [2023-11-17 16:18:25,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 712 places, 5520 transitions, 225721 flow [2023-11-17 16:19:29,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 699 places, 5520 transitions, 222779 flow, removed 1074 selfloop flow, removed 13 redundant places. [2023-11-17 16:19:29,421 INFO L231 Difference]: Finished difference. Result has 712 places, 5372 transitions, 222148 flow [2023-11-17 16:19:29,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=146352, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=222148, PETRI_PLACES=712, PETRI_TRANSITIONS=5372} [2023-11-17 16:19:29,424 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 692 predicate places. [2023-11-17 16:19:29,424 INFO L495 AbstractCegarLoop]: Abstraction has has 712 places, 5372 transitions, 222148 flow [2023-11-17 16:19:29,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 55.64) internal successors, (1391), 25 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:19:29,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:19:29,425 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:19:29,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-17 16:19:29,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 16:19:29,629 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:19:29,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:19:29,629 INFO L85 PathProgramCache]: Analyzing trace with hash 407120688, now seen corresponding path program 33 times [2023-11-17 16:19:29,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:19:29,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209967057] [2023-11-17 16:19:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:29,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:19:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:19:29,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:19:29,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209967057] [2023-11-17 16:19:29,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209967057] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:19:29,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926040983] [2023-11-17 16:19:29,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:19:29,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:19:29,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:19:29,732 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:19:29,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 16:19:29,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 16:19:29,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:19:29,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:19:29,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:19:29,945 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 16:19:29,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:19:30,021 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 16:19:30,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926040983] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:19:30,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:19:30,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-11-17 16:19:30,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861614088] [2023-11-17 16:19:30,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:19:30,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:19:30,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:19:30,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:19:30,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:19:30,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:19:30,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 5372 transitions, 222148 flow. Second operand has 25 states, 25 states have (on average 55.48) internal successors, (1387), 25 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:19:30,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:19:30,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:19:30,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:20:18,675 INFO L124 PetriNetUnfolderBase]: 12776/22745 cut-off events. [2023-11-17 16:20:18,675 INFO L125 PetriNetUnfolderBase]: For 1450520/1450520 co-relation queries the response was YES. [2023-11-17 16:20:19,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373987 conditions, 22745 events. 12776/22745 cut-off events. For 1450520/1450520 co-relation queries the response was YES. Maximal size of possible extension queue 1580. Compared 198800 event pairs, 3913 based on Foata normal form. 80/22825 useless extension candidates. Maximal degree in co-relation 372487. Up to 21573 conditions per place. [2023-11-17 16:20:19,336 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 5220 selfloop transitions, 320 changer transitions 31/5571 dead transitions. [2023-11-17 16:20:19,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 756 places, 5571 transitions, 238193 flow [2023-11-17 16:20:19,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-17 16:20:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-17 16:20:19,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2636 transitions. [2023-11-17 16:20:19,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43071895424836604 [2023-11-17 16:20:19,339 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2636 transitions. [2023-11-17 16:20:19,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2636 transitions. [2023-11-17 16:20:19,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:20:19,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2636 transitions. [2023-11-17 16:20:19,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 58.577777777777776) internal successors, (2636), 45 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:20:19,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 136.0) internal successors, (6256), 46 states have internal predecessors, (6256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:20:19,347 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 136.0) internal successors, (6256), 46 states have internal predecessors, (6256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:20:19,347 INFO L175 Difference]: Start difference. First operand has 712 places, 5372 transitions, 222148 flow. Second operand 45 states and 2636 transitions. [2023-11-17 16:20:19,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 756 places, 5571 transitions, 238193 flow [2023-11-17 16:21:34,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 741 places, 5571 transitions, 236656 flow, removed 562 selfloop flow, removed 15 redundant places. [2023-11-17 16:21:35,046 INFO L231 Difference]: Finished difference. Result has 762 places, 5464 transitions, 225181 flow [2023-11-17 16:21:35,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=220619, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=225181, PETRI_PLACES=762, PETRI_TRANSITIONS=5464} [2023-11-17 16:21:35,050 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 742 predicate places. [2023-11-17 16:21:35,050 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 5464 transitions, 225181 flow [2023-11-17 16:21:35,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 55.48) internal successors, (1387), 25 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:21:35,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:35,051 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:21:35,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-17 16:21:35,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 16:21:35,252 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:21:35,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1259457140, now seen corresponding path program 34 times [2023-11-17 16:21:35,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:35,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656762374] [2023-11-17 16:21:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:35,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:21:35,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:35,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656762374] [2023-11-17 16:21:35,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656762374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:35,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016281314] [2023-11-17 16:21:35,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:21:35,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:35,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:35,353 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:21:35,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 16:21:35,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:21:35,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:21:35,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:21:35,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:21:35,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:21:35,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016281314] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:35,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:35,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2023-11-17 16:21:35,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459523134] [2023-11-17 16:21:35,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:35,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:21:35,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:35,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:21:35,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:21:35,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-11-17 16:21:35,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 5464 transitions, 225181 flow. Second operand has 21 states, 21 states have (on average 55.714285714285715) internal successors, (1170), 21 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:21:35,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:35,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-11-17 16:21:35,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:22:31,139 INFO L124 PetriNetUnfolderBase]: 12785/22719 cut-off events. [2023-11-17 16:22:31,139 INFO L125 PetriNetUnfolderBase]: For 1360496/1360496 co-relation queries the response was YES. [2023-11-17 16:22:31,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371047 conditions, 22719 events. 12785/22719 cut-off events. For 1360496/1360496 co-relation queries the response was YES. Maximal size of possible extension queue 1578. Compared 198191 event pairs, 3970 based on Foata normal form. 6/22725 useless extension candidates. Maximal degree in co-relation 369963. Up to 21913 conditions per place. [2023-11-17 16:22:32,095 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 5216 selfloop transitions, 311 changer transitions 6/5533 dead transitions. [2023-11-17 16:22:32,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 782 places, 5533 transitions, 237763 flow [2023-11-17 16:22:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:22:32,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:22:32,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1281 transitions. [2023-11-17 16:22:32,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42814171122994654 [2023-11-17 16:22:32,097 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1281 transitions. [2023-11-17 16:22:32,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1281 transitions. [2023-11-17 16:22:32,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:22:32,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1281 transitions. [2023-11-17 16:22:32,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 58.22727272727273) internal successors, (1281), 22 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:22:32,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 136.0) internal successors, (3128), 23 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:22:32,100 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 136.0) internal successors, (3128), 23 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:22:32,100 INFO L175 Difference]: Start difference. First operand has 762 places, 5464 transitions, 225181 flow. Second operand 22 states and 1281 transitions. [2023-11-17 16:22:32,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 782 places, 5533 transitions, 237763 flow Received shutdown request... [2023-11-17 16:22:51,521 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:22:51,521 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:22:51,757 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 16:22:51,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-17 16:22:51,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:22:51,958 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-11-17 16:22:51,959 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 16:22:51,959 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 16:22:51,959 INFO L445 BasicCegarLoop]: Path program histogram: [34, 6, 1] [2023-11-17 16:22:51,961 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:22:51,962 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:22:51,964 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:22:51 BasicIcfg [2023-11-17 16:22:51,964 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:22:51,964 INFO L158 Benchmark]: Toolchain (without parser) took 534095.71ms. Allocated memory was 233.8MB in the beginning and 4.0GB in the end (delta: 3.8GB). Free memory was 184.9MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. [2023-11-17 16:22:51,964 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 176.2MB. Free memory is still 124.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:22:51,965 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.82ms. Allocated memory is still 233.8MB. Free memory was 184.9MB in the beginning and 173.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-11-17 16:22:51,965 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.12ms. Allocated memory is still 233.8MB. Free memory was 173.9MB in the beginning and 172.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:22:51,965 INFO L158 Benchmark]: Boogie Preprocessor took 23.14ms. Allocated memory is still 233.8MB. Free memory was 172.3MB in the beginning and 170.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 16:22:51,965 INFO L158 Benchmark]: RCFGBuilder took 325.27ms. Allocated memory is still 233.8MB. Free memory was 170.8MB in the beginning and 156.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-11-17 16:22:51,966 INFO L158 Benchmark]: TraceAbstraction took 533470.26ms. Allocated memory was 233.8MB in the beginning and 4.0GB in the end (delta: 3.8GB). Free memory was 155.5MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. [2023-11-17 16:22:51,967 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 176.2MB. Free memory is still 124.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 237.82ms. Allocated memory is still 233.8MB. Free memory was 184.9MB in the beginning and 173.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 30.12ms. Allocated memory is still 233.8MB. Free memory was 173.9MB in the beginning and 172.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.14ms. Allocated memory is still 233.8MB. Free memory was 172.3MB in the beginning and 170.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 325.27ms. Allocated memory is still 233.8MB. Free memory was 170.8MB in the beginning and 156.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 533470.26ms. Allocated memory was 233.8MB in the beginning and 4.0GB in the end (delta: 3.8GB). Free memory was 155.5MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 69 PlacesBefore, 20 PlacesAfterwards, 67 TransitionsBefore, 15 TransitionsAfterwards, 648 CoEnabledTransitionPairs, 5 FixpointIterations, 27 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 58 TotalNumberOfCompositions, 607 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 607, independent: 606, independent conditional: 0, independent unconditional: 606, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 459, independent: 458, independent conditional: 0, independent unconditional: 458, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 459, independent: 457, independent conditional: 0, independent unconditional: 457, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, independent: 1, independent conditional: 0, independent unconditional: 1, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 6, independent: 2, independent conditional: 0, independent unconditional: 2, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 607, independent: 148, independent conditional: 0, independent unconditional: 148, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 459, unknown conditional: 0, unknown unconditional: 459] , 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 - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 98 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: 533.4s, OverallIterations: 41, TraceHistogramMax: 4, PathProgramHistogramMax: 34, EmptinessCheckTime: 0.0s, AutomataDifference: 512.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1854 SdHoareTripleChecker+Valid, 6.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1854 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 5.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 297 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12513 IncrementalHoareTripleChecker+Invalid, 12810 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 297 mSolverCounterUnsat, 0 mSDtfsCounter, 12513 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2131 GetRequests, 970 SyntacticMatches, 173 SemanticMatches, 988 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11147 ImplicationChecksByTransitivity, 8.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=225181occurred in iteration=40, InterpolantAutomatonStates: 854, 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: 0.4s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 1385 NumberOfCodeBlocks, 1364 NumberOfCodeBlocksAsserted, 120 NumberOfCheckSat, 1935 ConstructedInterpolants, 0 QuantifiedInterpolants, 6143 SizeOfPredicates, 34 NumberOfNonLiveVariables, 4740 ConjunctsInSsa, 307 ConjunctsInUnsatCore, 115 InterpolantComputations, 4 PerfectInterpolantSequences, 375/1098 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown