/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-prod-cons.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:27:50,003 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:27:50,076 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 16:27:50,103 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:27:50,105 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:27:50,105 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:27:50,106 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:27:50,106 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:27:50,107 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:27:50,110 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:27:50,110 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:27:50,110 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:27:50,111 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:27:50,112 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:27:50,112 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:27:50,112 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:27:50,112 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:27:50,112 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:27:50,112 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:27:50,113 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:27:50,113 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:27:50,113 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:27:50,114 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:27:50,114 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:27:50,115 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:27:50,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:27:50,115 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:27:50,115 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:27:50,115 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:27:50,115 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:27:50,116 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:27:50,116 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:27:50,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:27:50,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:27:50,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:27:50,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:27:50,281 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:27:50,282 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:27:50,282 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-11-17 16:27:51,407 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:27:51,565 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:27:51,566 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-11-17 16:27:51,571 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff8111949/189dd4781635425bb06a6c45db04c5bb/FLAGde4208d6a [2023-11-17 16:27:51,584 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff8111949/189dd4781635425bb06a6c45db04c5bb [2023-11-17 16:27:51,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:27:51,586 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:27:51,587 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:27:51,587 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:27:51,590 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:27:51,591 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:27:51" (1/1) ... [2023-11-17 16:27:51,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76c839be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:27:51, skipping insertion in model container [2023-11-17 16:27:51,591 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:27:51" (1/1) ... [2023-11-17 16:27:51,611 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:27:51,745 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-prod-cons.wvr.c[3095,3108] [2023-11-17 16:27:51,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:27:51,756 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:27:51,777 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-prod-cons.wvr.c[3095,3108] [2023-11-17 16:27:51,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:27:51,784 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:27:51,784 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:27:51,792 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:27:51,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:27:51 WrapperNode [2023-11-17 16:27:51,793 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:27:51,794 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:27:51,794 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:27:51,794 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:27:51,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:27:51" (1/1) ... [2023-11-17 16:27:51,804 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:27:51" (1/1) ... [2023-11-17 16:27:51,820 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 173 [2023-11-17 16:27:51,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:27:51,821 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:27:51,821 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:27:51,821 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:27:51,828 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:27:51" (1/1) ... [2023-11-17 16:27:51,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:27:51" (1/1) ... [2023-11-17 16:27:51,831 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:27:51" (1/1) ... [2023-11-17 16:27:51,831 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:27:51" (1/1) ... [2023-11-17 16:27:51,842 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:27:51" (1/1) ... [2023-11-17 16:27:51,846 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:27:51" (1/1) ... [2023-11-17 16:27:51,850 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:27:51" (1/1) ... [2023-11-17 16:27:51,859 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:27:51" (1/1) ... [2023-11-17 16:27:51,861 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:27:51,862 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:27:51,862 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:27:51,862 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:27:51,863 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:27:51" (1/1) ... [2023-11-17 16:27:51,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:27:51,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:51,896 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 16:27:51,898 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 16:27:51,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:27:51,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:27:51,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:27:51,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:27:51,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:27:51,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:27:51,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:27:51,918 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:27:51,918 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:27:51,918 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:27:51,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:27:51,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:27:51,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:27:51,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:27:51,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:27:51,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:27:51,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:27:51,919 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 16:27:51,998 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:27:52,000 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:27:52,206 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:27:52,276 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:27:52,277 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 16:27:52,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:27:52 BoogieIcfgContainer [2023-11-17 16:27:52,278 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:27:52,283 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:27:52,283 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:27:52,286 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:27:52,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:27:51" (1/3) ... [2023-11-17 16:27:52,286 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42cfa33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:27:52, skipping insertion in model container [2023-11-17 16:27:52,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:27:51" (2/3) ... [2023-11-17 16:27:52,287 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42cfa33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:27:52, skipping insertion in model container [2023-11-17 16:27:52,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:27:52" (3/3) ... [2023-11-17 16:27:52,288 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-11-17 16:27:52,300 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:27:52,300 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:27:52,300 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:27:52,345 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 16:27:52,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 161 transitions, 343 flow [2023-11-17 16:27:52,418 INFO L124 PetriNetUnfolderBase]: 11/158 cut-off events. [2023-11-17 16:27:52,418 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:27:52,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 158 events. 11/158 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 97 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-11-17 16:27:52,423 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 161 transitions, 343 flow [2023-11-17 16:27:52,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 147 transitions, 312 flow [2023-11-17 16:27:52,439 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:27:52,458 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 147 transitions, 312 flow [2023-11-17 16:27:52,460 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 147 transitions, 312 flow [2023-11-17 16:27:52,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 147 transitions, 312 flow [2023-11-17 16:27:52,487 INFO L124 PetriNetUnfolderBase]: 11/147 cut-off events. [2023-11-17 16:27:52,488 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:27:52,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 147 events. 11/147 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-11-17 16:27:52,490 INFO L119 LiptonReduction]: Number of co-enabled transitions 1324 [2023-11-17 16:27:56,659 INFO L134 LiptonReduction]: Checked pairs total: 2239 [2023-11-17 16:27:56,659 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-11-17 16:27:56,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:27:56,692 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;@59afb572, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:27:56,692 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 16:27:56,696 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:27:56,696 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2023-11-17 16:27:56,696 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:27:56,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:56,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:56,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:27:56,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:56,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2007509593, now seen corresponding path program 1 times [2023-11-17 16:27:56,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:56,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316398780] [2023-11-17 16:27:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:56,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:56,958 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 16:27:56,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:56,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316398780] [2023-11-17 16:27:56,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316398780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:27:56,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:27:56,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:27:56,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475955451] [2023-11-17 16:27:56,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:27:56,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:27:56,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:56,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:27:56,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:27:56,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 307 [2023-11-17 16:27:56,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:56,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:56,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 307 [2023-11-17 16:27:56,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:57,167 INFO L124 PetriNetUnfolderBase]: 214/370 cut-off events. [2023-11-17 16:27:57,167 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-17 16:27:57,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 762 conditions, 370 events. 214/370 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1321 event pairs, 15 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 640. Up to 121 conditions per place. [2023-11-17 16:27:57,170 INFO L140 encePairwiseOnDemand]: 302/307 looper letters, 48 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-11-17 16:27:57,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 54 transitions, 244 flow [2023-11-17 16:27:57,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:27:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:27:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 735 transitions. [2023-11-17 16:27:57,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4788273615635179 [2023-11-17 16:27:57,185 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 735 transitions. [2023-11-17 16:27:57,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 735 transitions. [2023-11-17 16:27:57,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:57,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 735 transitions. [2023-11-17 16:27:57,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,198 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 307.0) internal successors, (1842), 6 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,208 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 68 flow. Second operand 5 states and 735 transitions. [2023-11-17 16:27:57,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 54 transitions, 244 flow [2023-11-17 16:27:57,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 54 transitions, 221 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-17 16:27:57,212 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 84 flow [2023-11-17 16:27:57,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-17 16:27:57,215 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-11-17 16:27:57,215 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 84 flow [2023-11-17 16:27:57,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:57,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:57,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:27:57,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:27:57,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:57,217 INFO L85 PathProgramCache]: Analyzing trace with hash 904818795, now seen corresponding path program 2 times [2023-11-17 16:27:57,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:57,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114152229] [2023-11-17 16:27:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:57,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:57,472 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 16:27:57,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:57,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114152229] [2023-11-17 16:27:57,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114152229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:27:57,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:27:57,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:27:57,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584062058] [2023-11-17 16:27:57,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:27:57,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:27:57,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:57,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:27:57,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:27:57,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 307 [2023-11-17 16:27:57,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 133.16666666666666) internal successors, (799), 6 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:57,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 307 [2023-11-17 16:27:57,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:57,627 INFO L124 PetriNetUnfolderBase]: 474/756 cut-off events. [2023-11-17 16:27:57,628 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2023-11-17 16:27:57,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1752 conditions, 756 events. 474/756 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2820 event pairs, 37 based on Foata normal form. 20/717 useless extension candidates. Maximal degree in co-relation 658. Up to 278 conditions per place. [2023-11-17 16:27:57,631 INFO L140 encePairwiseOnDemand]: 300/307 looper letters, 59 selfloop transitions, 6 changer transitions 4/69 dead transitions. [2023-11-17 16:27:57,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 69 transitions, 318 flow [2023-11-17 16:27:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:27:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:27:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 979 transitions. [2023-11-17 16:27:57,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45556072591903213 [2023-11-17 16:27:57,633 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 979 transitions. [2023-11-17 16:27:57,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 979 transitions. [2023-11-17 16:27:57,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:57,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 979 transitions. [2023-11-17 16:27:57,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 139.85714285714286) internal successors, (979), 7 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 307.0) internal successors, (2456), 8 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,639 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 307.0) internal successors, (2456), 8 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,639 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 84 flow. Second operand 7 states and 979 transitions. [2023-11-17 16:27:57,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 69 transitions, 318 flow [2023-11-17 16:27:57,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 69 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:27:57,641 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 98 flow [2023-11-17 16:27:57,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=98, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-11-17 16:27:57,642 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-11-17 16:27:57,642 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 98 flow [2023-11-17 16:27:57,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 133.16666666666666) internal successors, (799), 6 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:57,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:57,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:27:57,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:27:57,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:57,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2107880923, now seen corresponding path program 1 times [2023-11-17 16:27:57,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:57,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688927084] [2023-11-17 16:27:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:57,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:57,704 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 16:27:57,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:57,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688927084] [2023-11-17 16:27:57,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688927084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:27:57,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:27:57,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:27:57,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777897991] [2023-11-17 16:27:57,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:27:57,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:27:57,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:57,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:27:57,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:27:57,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 307 [2023-11-17 16:27:57,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:57,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 307 [2023-11-17 16:27:57,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:57,759 INFO L124 PetriNetUnfolderBase]: 217/405 cut-off events. [2023-11-17 16:27:57,760 INFO L125 PetriNetUnfolderBase]: For 519/519 co-relation queries the response was YES. [2023-11-17 16:27:57,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1067 conditions, 405 events. 217/405 cut-off events. For 519/519 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1461 event pairs, 99 based on Foata normal form. 18/380 useless extension candidates. Maximal degree in co-relation 662. Up to 264 conditions per place. [2023-11-17 16:27:57,761 INFO L140 encePairwiseOnDemand]: 304/307 looper letters, 29 selfloop transitions, 2 changer transitions 3/38 dead transitions. [2023-11-17 16:27:57,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 198 flow [2023-11-17 16:27:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:27:57,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:27:57,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-11-17 16:27:57,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49728555917481 [2023-11-17 16:27:57,763 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-11-17 16:27:57,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-11-17 16:27:57,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:57,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-11-17 16:27:57,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,766 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 98 flow. Second operand 3 states and 458 transitions. [2023-11-17 16:27:57,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 198 flow [2023-11-17 16:27:57,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 176 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-11-17 16:27:57,768 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 92 flow [2023-11-17 16:27:57,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-11-17 16:27:57,769 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-11-17 16:27:57,769 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 92 flow [2023-11-17 16:27:57,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:57,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:57,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:27:57,769 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:27:57,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:57,770 INFO L85 PathProgramCache]: Analyzing trace with hash -131406884, now seen corresponding path program 1 times [2023-11-17 16:27:57,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:57,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285896064] [2023-11-17 16:27:57,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:57,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:27:57,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:57,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285896064] [2023-11-17 16:27:57,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285896064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:27:57,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:27:57,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:27:57,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756323580] [2023-11-17 16:27:57,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:27:57,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:27:57,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:57,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:27:57,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:27:57,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 307 [2023-11-17 16:27:57,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:57,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 307 [2023-11-17 16:27:57,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:57,930 INFO L124 PetriNetUnfolderBase]: 258/492 cut-off events. [2023-11-17 16:27:57,931 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2023-11-17 16:27:57,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 492 events. 258/492 cut-off events. For 309/309 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1815 event pairs, 211 based on Foata normal form. 10/447 useless extension candidates. Maximal degree in co-relation 761. Up to 352 conditions per place. [2023-11-17 16:27:57,933 INFO L140 encePairwiseOnDemand]: 303/307 looper letters, 23 selfloop transitions, 2 changer transitions 13/42 dead transitions. [2023-11-17 16:27:57,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 42 transitions, 203 flow [2023-11-17 16:27:57,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:27:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:27:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 554 transitions. [2023-11-17 16:27:57,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511400651465798 [2023-11-17 16:27:57,934 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 554 transitions. [2023-11-17 16:27:57,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 554 transitions. [2023-11-17 16:27:57,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:57,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 554 transitions. [2023-11-17 16:27:57,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,938 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,938 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 92 flow. Second operand 4 states and 554 transitions. [2023-11-17 16:27:57,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 42 transitions, 203 flow [2023-11-17 16:27:57,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 201 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:27:57,940 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 104 flow [2023-11-17 16:27:57,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-11-17 16:27:57,940 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2023-11-17 16:27:57,940 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 104 flow [2023-11-17 16:27:57,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:57,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:57,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:57,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:27:57,941 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:27:57,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:57,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1241826556, now seen corresponding path program 1 times [2023-11-17 16:27:57,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:57,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697340309] [2023-11-17 16:27:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:57,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:58,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:58,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697340309] [2023-11-17 16:27:58,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697340309] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:58,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057135883] [2023-11-17 16:27:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:58,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:58,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:58,600 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 16:27:58,601 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 16:27:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:58,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-17 16:27:58,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:58,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 126 [2023-11-17 16:27:59,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-17 16:27:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:59,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:59,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:27:59,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2023-11-17 16:27:59,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-17 16:27:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:59,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057135883] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:59,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:59,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2023-11-17 16:27:59,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40059992] [2023-11-17 16:27:59,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:59,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 16:27:59,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:59,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 16:27:59,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2023-11-17 16:27:59,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 307 [2023-11-17 16:27:59,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 104 flow. Second operand has 33 states, 33 states have (on average 88.9090909090909) internal successors, (2934), 33 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:59,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:59,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 307 [2023-11-17 16:27:59,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:28:02,042 INFO L124 PetriNetUnfolderBase]: 1202/1991 cut-off events. [2023-11-17 16:28:02,042 INFO L125 PetriNetUnfolderBase]: For 896/896 co-relation queries the response was YES. [2023-11-17 16:28:02,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5251 conditions, 1991 events. 1202/1991 cut-off events. For 896/896 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 9569 event pairs, 41 based on Foata normal form. 33/1814 useless extension candidates. Maximal degree in co-relation 5234. Up to 411 conditions per place. [2023-11-17 16:28:02,049 INFO L140 encePairwiseOnDemand]: 291/307 looper letters, 230 selfloop transitions, 57 changer transitions 49/336 dead transitions. [2023-11-17 16:28:02,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 336 transitions, 1652 flow [2023-11-17 16:28:02,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-17 16:28:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-17 16:28:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3989 transitions. [2023-11-17 16:28:02,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30936869861951294 [2023-11-17 16:28:02,058 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3989 transitions. [2023-11-17 16:28:02,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3989 transitions. [2023-11-17 16:28:02,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:28:02,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3989 transitions. [2023-11-17 16:28:02,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 94.97619047619048) internal successors, (3989), 42 states have internal predecessors, (3989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:02,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 307.0) internal successors, (13201), 43 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:02,078 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 307.0) internal successors, (13201), 43 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:02,078 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 104 flow. Second operand 42 states and 3989 transitions. [2023-11-17 16:28:02,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 336 transitions, 1652 flow [2023-11-17 16:28:02,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 336 transitions, 1636 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-17 16:28:02,085 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 548 flow [2023-11-17 16:28:02,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=548, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2023-11-17 16:28:02,086 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 65 predicate places. [2023-11-17 16:28:02,086 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 548 flow [2023-11-17 16:28:02,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 88.9090909090909) internal successors, (2934), 33 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:02,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:28:02,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:28:02,092 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 16:28:02,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:02,292 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:28:02,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:28:02,292 INFO L85 PathProgramCache]: Analyzing trace with hash 288888624, now seen corresponding path program 2 times [2023-11-17 16:28:02,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:28:02,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854609495] [2023-11-17 16:28:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:28:02,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:28:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:28:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:03,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:28:03,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854609495] [2023-11-17 16:28:03,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854609495] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:28:03,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243908041] [2023-11-17 16:28:03,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:28:03,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:03,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:28:03,135 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 16:28:03,138 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 16:28:03,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:28:03,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:28:03,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-17 16:28:03,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:28:03,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2023-11-17 16:28:03,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-17 16:28:03,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-17 16:28:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:03,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:28:03,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:03,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 174 [2023-11-17 16:28:03,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-11-17 16:28:03,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-11-17 16:28:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:04,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243908041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:28:04,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:28:04,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2023-11-17 16:28:04,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497101306] [2023-11-17 16:28:04,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:28:04,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 16:28:04,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:28:04,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 16:28:04,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=989, Unknown=1, NotChecked=0, Total=1122 [2023-11-17 16:28:04,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 307 [2023-11-17 16:28:04,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 81 transitions, 548 flow. Second operand has 34 states, 34 states have (on average 82.94117647058823) internal successors, (2820), 34 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:04,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:28:04,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 307 [2023-11-17 16:28:04,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:28:06,197 INFO L124 PetriNetUnfolderBase]: 1361/2258 cut-off events. [2023-11-17 16:28:06,197 INFO L125 PetriNetUnfolderBase]: For 15273/15273 co-relation queries the response was YES. [2023-11-17 16:28:06,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11305 conditions, 2258 events. 1361/2258 cut-off events. For 15273/15273 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11278 event pairs, 63 based on Foata normal form. 24/2278 useless extension candidates. Maximal degree in co-relation 11161. Up to 486 conditions per place. [2023-11-17 16:28:06,214 INFO L140 encePairwiseOnDemand]: 292/307 looper letters, 203 selfloop transitions, 79 changer transitions 9/291 dead transitions. [2023-11-17 16:28:06,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 291 transitions, 2412 flow [2023-11-17 16:28:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 16:28:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 16:28:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3253 transitions. [2023-11-17 16:28:06,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2863808433841007 [2023-11-17 16:28:06,220 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3253 transitions. [2023-11-17 16:28:06,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3253 transitions. [2023-11-17 16:28:06,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:28:06,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3253 transitions. [2023-11-17 16:28:06,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 87.91891891891892) internal successors, (3253), 37 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:06,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 307.0) internal successors, (11666), 38 states have internal predecessors, (11666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:06,244 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 307.0) internal successors, (11666), 38 states have internal predecessors, (11666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:06,244 INFO L175 Difference]: Start difference. First operand has 97 places, 81 transitions, 548 flow. Second operand 37 states and 3253 transitions. [2023-11-17 16:28:06,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 291 transitions, 2412 flow [2023-11-17 16:28:06,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 291 transitions, 2333 flow, removed 28 selfloop flow, removed 6 redundant places. [2023-11-17 16:28:06,272 INFO L231 Difference]: Finished difference. Result has 135 places, 107 transitions, 1002 flow [2023-11-17 16:28:06,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1002, PETRI_PLACES=135, PETRI_TRANSITIONS=107} [2023-11-17 16:28:06,274 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 103 predicate places. [2023-11-17 16:28:06,274 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 107 transitions, 1002 flow [2023-11-17 16:28:06,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 82.94117647058823) internal successors, (2820), 34 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:06,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:28:06,275 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:28:06,293 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 16:28:06,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 16:28:06,498 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:28:06,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:28:06,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1051062742, now seen corresponding path program 3 times [2023-11-17 16:28:06,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:28:06,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84640285] [2023-11-17 16:28:06,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:28:06,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:28:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:28:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:28:06,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:28:06,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84640285] [2023-11-17 16:28:06,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84640285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:28:06,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515105636] [2023-11-17 16:28:06,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:28:06,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:06,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:28:06,588 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 16:28:06,593 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 16:28:06,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:28:06,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:28:06,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:28:06,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:28:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:28:06,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:28:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:28:06,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515105636] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:28:06,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:28:06,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 4] total 10 [2023-11-17 16:28:06,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936462005] [2023-11-17 16:28:06,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:28:06,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:28:06,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:28:06,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:28:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:28:06,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 307 [2023-11-17 16:28:06,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 107 transitions, 1002 flow. Second operand has 11 states, 11 states have (on average 130.45454545454547) internal successors, (1435), 11 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:06,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:28:06,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 307 [2023-11-17 16:28:06,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:28:07,192 INFO L124 PetriNetUnfolderBase]: 1455/2808 cut-off events. [2023-11-17 16:28:07,192 INFO L125 PetriNetUnfolderBase]: For 40480/40661 co-relation queries the response was YES. [2023-11-17 16:28:07,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16918 conditions, 2808 events. 1455/2808 cut-off events. For 40480/40661 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17892 event pairs, 394 based on Foata normal form. 133/2908 useless extension candidates. Maximal degree in co-relation 15646. Up to 677 conditions per place. [2023-11-17 16:28:07,213 INFO L140 encePairwiseOnDemand]: 302/307 looper letters, 89 selfloop transitions, 15 changer transitions 94/207 dead transitions. [2023-11-17 16:28:07,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 207 transitions, 2224 flow [2023-11-17 16:28:07,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:28:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:28:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1489 transitions. [2023-11-17 16:28:07,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409238969499556 [2023-11-17 16:28:07,219 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1489 transitions. [2023-11-17 16:28:07,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1489 transitions. [2023-11-17 16:28:07,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:28:07,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1489 transitions. [2023-11-17 16:28:07,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 135.36363636363637) internal successors, (1489), 11 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:07,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 307.0) internal successors, (3684), 12 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:07,225 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 307.0) internal successors, (3684), 12 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:07,225 INFO L175 Difference]: Start difference. First operand has 135 places, 107 transitions, 1002 flow. Second operand 11 states and 1489 transitions. [2023-11-17 16:28:07,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 207 transitions, 2224 flow [2023-11-17 16:28:07,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 207 transitions, 2077 flow, removed 38 selfloop flow, removed 20 redundant places. [2023-11-17 16:28:07,270 INFO L231 Difference]: Finished difference. Result has 129 places, 72 transitions, 644 flow [2023-11-17 16:28:07,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=644, PETRI_PLACES=129, PETRI_TRANSITIONS=72} [2023-11-17 16:28:07,271 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 97 predicate places. [2023-11-17 16:28:07,271 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 72 transitions, 644 flow [2023-11-17 16:28:07,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.45454545454547) internal successors, (1435), 11 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:07,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:28:07,272 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:28:07,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 16:28:07,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:07,477 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:28:07,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:28:07,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1756694594, now seen corresponding path program 4 times [2023-11-17 16:28:07,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:28:07,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604250172] [2023-11-17 16:28:07,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:28:07,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:28:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:28:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:08,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:28:08,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604250172] [2023-11-17 16:28:08,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604250172] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:28:08,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055901156] [2023-11-17 16:28:08,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:28:08,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:08,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:28:08,249 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 16:28:08,272 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 16:28:08,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:28:08,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:28:08,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 16:28:08,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:28:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:28:08,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:28:08,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:08,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-17 16:28:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:28:08,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055901156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:28:08,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:28:08,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 33 [2023-11-17 16:28:08,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968260194] [2023-11-17 16:28:08,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:28:08,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 16:28:08,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:28:08,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 16:28:08,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 16:28:08,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 307 [2023-11-17 16:28:08,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 72 transitions, 644 flow. Second operand has 34 states, 34 states have (on average 93.97058823529412) internal successors, (3195), 34 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:08,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:28:08,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 307 [2023-11-17 16:28:08,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:28:10,712 INFO L124 PetriNetUnfolderBase]: 3307/5538 cut-off events. [2023-11-17 16:28:10,712 INFO L125 PetriNetUnfolderBase]: For 79353/79353 co-relation queries the response was YES. [2023-11-17 16:28:10,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34698 conditions, 5538 events. 3307/5538 cut-off events. For 79353/79353 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 32678 event pairs, 164 based on Foata normal form. 72/5608 useless extension candidates. Maximal degree in co-relation 34200. Up to 1442 conditions per place. [2023-11-17 16:28:10,756 INFO L140 encePairwiseOnDemand]: 290/307 looper letters, 213 selfloop transitions, 93 changer transitions 24/330 dead transitions. [2023-11-17 16:28:10,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 330 transitions, 3669 flow [2023-11-17 16:28:10,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-17 16:28:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-17 16:28:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3747 transitions. [2023-11-17 16:28:10,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3211897822732728 [2023-11-17 16:28:10,760 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3747 transitions. [2023-11-17 16:28:10,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3747 transitions. [2023-11-17 16:28:10,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:28:10,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3747 transitions. [2023-11-17 16:28:10,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 98.60526315789474) internal successors, (3747), 38 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:10,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 307.0) internal successors, (11973), 39 states have internal predecessors, (11973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:10,774 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 307.0) internal successors, (11973), 39 states have internal predecessors, (11973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:10,775 INFO L175 Difference]: Start difference. First operand has 129 places, 72 transitions, 644 flow. Second operand 38 states and 3747 transitions. [2023-11-17 16:28:10,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 330 transitions, 3669 flow [2023-11-17 16:28:10,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 330 transitions, 2803 flow, removed 431 selfloop flow, removed 17 redundant places. [2023-11-17 16:28:10,932 INFO L231 Difference]: Finished difference. Result has 134 places, 124 transitions, 1360 flow [2023-11-17 16:28:10,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1360, PETRI_PLACES=134, PETRI_TRANSITIONS=124} [2023-11-17 16:28:10,932 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 102 predicate places. [2023-11-17 16:28:10,932 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 124 transitions, 1360 flow [2023-11-17 16:28:10,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 93.97058823529412) internal successors, (3195), 34 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:10,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:28:10,937 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:28:10,941 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 16:28:11,141 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 16:28:11,142 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:28:11,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:28:11,142 INFO L85 PathProgramCache]: Analyzing trace with hash 858367730, now seen corresponding path program 5 times [2023-11-17 16:28:11,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:28:11,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534901583] [2023-11-17 16:28:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:28:11,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:28:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:28:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:11,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:28:11,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534901583] [2023-11-17 16:28:11,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534901583] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:28:11,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182305948] [2023-11-17 16:28:11,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:28:11,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:28:11,957 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 16:28:11,958 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 16:28:12,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:28:12,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:28:12,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:28:12,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:28:12,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2023-11-17 16:28:12,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:28:12,397 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 16:28:12,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:28:12,548 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:12,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2023-11-17 16:28:12,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-17 16:28:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:28:12,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182305948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:28:12,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:28:12,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 12] total 38 [2023-11-17 16:28:12,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658735137] [2023-11-17 16:28:12,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:28:12,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 16:28:12,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:28:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 16:28:12,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1310, Unknown=5, NotChecked=0, Total=1482 [2023-11-17 16:28:12,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 307 [2023-11-17 16:28:12,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 124 transitions, 1360 flow. Second operand has 39 states, 39 states have (on average 88.87179487179488) internal successors, (3466), 39 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:12,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:28:12,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 307 [2023-11-17 16:28:12,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:28:14,668 INFO L124 PetriNetUnfolderBase]: 3513/5866 cut-off events. [2023-11-17 16:28:14,668 INFO L125 PetriNetUnfolderBase]: For 83487/83487 co-relation queries the response was YES. [2023-11-17 16:28:14,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38412 conditions, 5866 events. 3513/5866 cut-off events. For 83487/83487 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 35348 event pairs, 246 based on Foata normal form. 48/5913 useless extension candidates. Maximal degree in co-relation 33565. Up to 2438 conditions per place. [2023-11-17 16:28:14,706 INFO L140 encePairwiseOnDemand]: 293/307 looper letters, 185 selfloop transitions, 89 changer transitions 8/282 dead transitions. [2023-11-17 16:28:14,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 282 transitions, 3344 flow [2023-11-17 16:28:14,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 16:28:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 16:28:14,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2979 transitions. [2023-11-17 16:28:14,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3032369706840391 [2023-11-17 16:28:14,711 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2979 transitions. [2023-11-17 16:28:14,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2979 transitions. [2023-11-17 16:28:14,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:28:14,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2979 transitions. [2023-11-17 16:28:14,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 93.09375) internal successors, (2979), 32 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:14,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 307.0) internal successors, (10131), 33 states have internal predecessors, (10131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:14,727 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 307.0) internal successors, (10131), 33 states have internal predecessors, (10131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:14,727 INFO L175 Difference]: Start difference. First operand has 134 places, 124 transitions, 1360 flow. Second operand 32 states and 2979 transitions. [2023-11-17 16:28:14,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 282 transitions, 3344 flow [2023-11-17 16:28:14,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 282 transitions, 3158 flow, removed 55 selfloop flow, removed 10 redundant places. [2023-11-17 16:28:14,826 INFO L231 Difference]: Finished difference. Result has 158 places, 132 transitions, 1553 flow [2023-11-17 16:28:14,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1553, PETRI_PLACES=158, PETRI_TRANSITIONS=132} [2023-11-17 16:28:14,827 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 126 predicate places. [2023-11-17 16:28:14,827 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 132 transitions, 1553 flow [2023-11-17 16:28:14,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 88.87179487179488) internal successors, (3466), 39 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:14,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:28:14,828 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:28:14,832 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 16:28:15,032 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 16:28:15,033 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:28:15,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:28:15,033 INFO L85 PathProgramCache]: Analyzing trace with hash 970676338, now seen corresponding path program 6 times [2023-11-17 16:28:15,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:28:15,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131123412] [2023-11-17 16:28:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:28:15,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:28:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:28:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:16,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:28:16,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131123412] [2023-11-17 16:28:16,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131123412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:28:16,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856825603] [2023-11-17 16:28:16,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:28:16,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:16,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:28:16,070 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 16:28:16,097 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 16:28:16,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:28:16,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:28:16,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 16:28:16,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:28:16,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 80 [2023-11-17 16:28:16,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:28:16,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:28:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:28:16,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:28:16,582 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_302 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_302) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1))) is different from false [2023-11-17 16:28:16,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:16,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 88 [2023-11-17 16:28:16,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-11-17 16:28:16,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-11-17 16:28:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:28:16,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856825603] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:28:16,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:28:16,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 36 [2023-11-17 16:28:16,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780208024] [2023-11-17 16:28:16,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:28:16,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 16:28:16,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:28:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 16:28:16,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1115, Unknown=10, NotChecked=68, Total=1332 [2023-11-17 16:28:16,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 307 [2023-11-17 16:28:16,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 132 transitions, 1553 flow. Second operand has 37 states, 37 states have (on average 85.89189189189189) internal successors, (3178), 37 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:16,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:28:16,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 307 [2023-11-17 16:28:16,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:28:18,578 INFO L124 PetriNetUnfolderBase]: 3804/6345 cut-off events. [2023-11-17 16:28:18,578 INFO L125 PetriNetUnfolderBase]: For 102191/102191 co-relation queries the response was YES. [2023-11-17 16:28:18,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43374 conditions, 6345 events. 3804/6345 cut-off events. For 102191/102191 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 38190 event pairs, 163 based on Foata normal form. 48/6393 useless extension candidates. Maximal degree in co-relation 38272. Up to 2734 conditions per place. [2023-11-17 16:28:18,617 INFO L140 encePairwiseOnDemand]: 294/307 looper letters, 174 selfloop transitions, 96 changer transitions 8/278 dead transitions. [2023-11-17 16:28:18,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 278 transitions, 3487 flow [2023-11-17 16:28:18,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 16:28:18,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 16:28:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2700 transitions. [2023-11-17 16:28:18,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2931596091205212 [2023-11-17 16:28:18,620 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2700 transitions. [2023-11-17 16:28:18,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2700 transitions. [2023-11-17 16:28:18,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:28:18,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2700 transitions. [2023-11-17 16:28:18,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 90.0) internal successors, (2700), 30 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:18,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 307.0) internal successors, (9517), 31 states have internal predecessors, (9517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:18,629 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 307.0) internal successors, (9517), 31 states have internal predecessors, (9517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:18,629 INFO L175 Difference]: Start difference. First operand has 158 places, 132 transitions, 1553 flow. Second operand 30 states and 2700 transitions. [2023-11-17 16:28:18,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 278 transitions, 3487 flow [2023-11-17 16:28:18,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 278 transitions, 3303 flow, removed 44 selfloop flow, removed 22 redundant places. [2023-11-17 16:28:18,743 INFO L231 Difference]: Finished difference. Result has 169 places, 138 transitions, 1844 flow [2023-11-17 16:28:18,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1844, PETRI_PLACES=169, PETRI_TRANSITIONS=138} [2023-11-17 16:28:18,744 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 137 predicate places. [2023-11-17 16:28:18,744 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 138 transitions, 1844 flow [2023-11-17 16:28:18,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 85.89189189189189) internal successors, (3178), 37 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:18,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:28:18,745 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:28:18,752 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 16:28:18,949 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 16:28:18,949 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:28:18,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:28:18,950 INFO L85 PathProgramCache]: Analyzing trace with hash 868843591, now seen corresponding path program 7 times [2023-11-17 16:28:18,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:28:18,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780117733] [2023-11-17 16:28:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:28:18,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:28:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:28:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:19,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:28:19,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780117733] [2023-11-17 16:28:19,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780117733] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:28:19,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803567385] [2023-11-17 16:28:19,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:28:19,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:19,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:28:19,540 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 16:28:19,571 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 16:28:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:28:19,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 16:28:19,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:28:20,148 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-11-17 16:28:20,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 19 [2023-11-17 16:28:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:20,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:28:20,527 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:28:20,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 53 [2023-11-17 16:28:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:21,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803567385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:28:21,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:28:21,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2023-11-17 16:28:21,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298578024] [2023-11-17 16:28:21,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:28:21,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-17 16:28:21,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:28:21,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-17 16:28:21,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2023-11-17 16:28:21,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 307 [2023-11-17 16:28:21,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 138 transitions, 1844 flow. Second operand has 44 states, 44 states have (on average 93.93181818181819) internal successors, (4133), 44 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:21,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:28:21,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 307 [2023-11-17 16:28:21,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:28:39,327 INFO L124 PetriNetUnfolderBase]: 15017/24907 cut-off events. [2023-11-17 16:28:39,327 INFO L125 PetriNetUnfolderBase]: For 444984/444984 co-relation queries the response was YES. [2023-11-17 16:28:39,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167203 conditions, 24907 events. 15017/24907 cut-off events. For 444984/444984 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 178891 event pairs, 917 based on Foata normal form. 368/25275 useless extension candidates. Maximal degree in co-relation 166942. Up to 6006 conditions per place. [2023-11-17 16:28:39,483 INFO L140 encePairwiseOnDemand]: 291/307 looper letters, 1162 selfloop transitions, 872 changer transitions 212/2246 dead transitions. [2023-11-17 16:28:39,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 2246 transitions, 28374 flow [2023-11-17 16:28:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2023-11-17 16:28:39,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2023-11-17 16:28:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 22055 transitions. [2023-11-17 16:28:39,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.325069641988592 [2023-11-17 16:28:39,507 INFO L72 ComplementDD]: Start complementDD. Operand 221 states and 22055 transitions. [2023-11-17 16:28:39,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 221 states and 22055 transitions. [2023-11-17 16:28:39,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:28:39,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 221 states and 22055 transitions. [2023-11-17 16:28:39,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 222 states, 221 states have (on average 99.79638009049773) internal successors, (22055), 221 states have internal predecessors, (22055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:39,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 222 states, 222 states have (on average 307.0) internal successors, (68154), 222 states have internal predecessors, (68154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:39,708 INFO L81 ComplementDD]: Finished complementDD. Result has 222 states, 222 states have (on average 307.0) internal successors, (68154), 222 states have internal predecessors, (68154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:39,708 INFO L175 Difference]: Start difference. First operand has 169 places, 138 transitions, 1844 flow. Second operand 221 states and 22055 transitions. [2023-11-17 16:28:39,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 2246 transitions, 28374 flow [2023-11-17 16:28:40,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 2246 transitions, 26685 flow, removed 131 selfloop flow, removed 25 redundant places. [2023-11-17 16:28:40,902 INFO L231 Difference]: Finished difference. Result has 435 places, 1124 transitions, 19297 flow [2023-11-17 16:28:40,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=221, PETRI_FLOW=19297, PETRI_PLACES=435, PETRI_TRANSITIONS=1124} [2023-11-17 16:28:40,903 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 403 predicate places. [2023-11-17 16:28:40,903 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 1124 transitions, 19297 flow [2023-11-17 16:28:40,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 93.93181818181819) internal successors, (4133), 44 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:40,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:28:40,904 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:28:40,909 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 16:28:41,109 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 16:28:41,109 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:28:41,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:28:41,110 INFO L85 PathProgramCache]: Analyzing trace with hash 885098465, now seen corresponding path program 8 times [2023-11-17 16:28:41,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:28:41,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21351838] [2023-11-17 16:28:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:28:41,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:28:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:28:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:41,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:28:41,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21351838] [2023-11-17 16:28:41,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21351838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:28:41,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613467421] [2023-11-17 16:28:41,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:28:41,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:41,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:28:41,821 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 16:28:41,823 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 16:28:41,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:28:41,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:28:41,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:28:41,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:28:42,423 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-11-17 16:28:42,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2023-11-17 16:28:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:42,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:28:42,803 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-11-17 16:28:42,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 45 [2023-11-17 16:28:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:43,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613467421] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:28:43,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:28:43,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2023-11-17 16:28:43,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572477607] [2023-11-17 16:28:43,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:28:43,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-17 16:28:43,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:28:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-17 16:28:43,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2023-11-17 16:28:43,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 307 [2023-11-17 16:28:43,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 1124 transitions, 19297 flow. Second operand has 44 states, 44 states have (on average 93.93181818181819) internal successors, (4133), 44 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:43,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:28:43,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 307 [2023-11-17 16:28:43,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:29:12,621 INFO L124 PetriNetUnfolderBase]: 34517/57673 cut-off events. [2023-11-17 16:29:12,622 INFO L125 PetriNetUnfolderBase]: For 2678505/2678505 co-relation queries the response was YES. [2023-11-17 16:29:13,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468779 conditions, 57673 events. 34517/57673 cut-off events. For 2678505/2678505 co-relation queries the response was YES. Maximal size of possible extension queue 1673. Compared 481081 event pairs, 5185 based on Foata normal form. 802/58475 useless extension candidates. Maximal degree in co-relation 468458. Up to 16825 conditions per place. [2023-11-17 16:29:13,909 INFO L140 encePairwiseOnDemand]: 290/307 looper letters, 2278 selfloop transitions, 1727 changer transitions 1191/5196 dead transitions. [2023-11-17 16:29:13,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 5196 transitions, 87812 flow [2023-11-17 16:29:13,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2023-11-17 16:29:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2023-11-17 16:29:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 18696 transitions. [2023-11-17 16:29:13,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.323930972347356 [2023-11-17 16:29:13,928 INFO L72 ComplementDD]: Start complementDD. Operand 188 states and 18696 transitions. [2023-11-17 16:29:13,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 188 states and 18696 transitions. [2023-11-17 16:29:13,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:29:13,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 188 states and 18696 transitions. [2023-11-17 16:29:13,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 189 states, 188 states have (on average 99.44680851063829) internal successors, (18696), 188 states have internal predecessors, (18696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:13,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 189 states, 189 states have (on average 307.0) internal successors, (58023), 189 states have internal predecessors, (58023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:13,993 INFO L81 ComplementDD]: Finished complementDD. Result has 189 states, 189 states have (on average 307.0) internal successors, (58023), 189 states have internal predecessors, (58023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:13,993 INFO L175 Difference]: Start difference. First operand has 435 places, 1124 transitions, 19297 flow. Second operand 188 states and 18696 transitions. [2023-11-17 16:29:13,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 5196 transitions, 87812 flow [2023-11-17 16:29:32,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 5196 transitions, 58749 flow, removed 13586 selfloop flow, removed 46 redundant places. [2023-11-17 16:29:32,436 INFO L231 Difference]: Finished difference. Result has 675 places, 2591 transitions, 37491 flow [2023-11-17 16:29:32,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=11540, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=188, PETRI_FLOW=37491, PETRI_PLACES=675, PETRI_TRANSITIONS=2591} [2023-11-17 16:29:32,437 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 643 predicate places. [2023-11-17 16:29:32,437 INFO L495 AbstractCegarLoop]: Abstraction has has 675 places, 2591 transitions, 37491 flow [2023-11-17 16:29:32,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 93.93181818181819) internal successors, (4133), 44 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:32,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:29:32,438 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:29:32,443 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 16:29:32,643 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 16:29:32,643 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:29:32,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:29:32,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2054798297, now seen corresponding path program 9 times [2023-11-17 16:29:32,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:29:32,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634057202] [2023-11-17 16:29:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:29:32,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:29:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:29:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:29:33,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:29:33,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634057202] [2023-11-17 16:29:33,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634057202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:29:33,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006389867] [2023-11-17 16:29:33,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:29:33,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:29:33,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:29:33,177 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 16:29:33,179 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 16:29:33,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:29:33,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:29:33,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:29:33,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:29:33,663 INFO L349 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-11-17 16:29:33,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 13 [2023-11-17 16:29:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:29:33,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:29:34,115 INFO L349 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2023-11-17 16:29:34,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 41 [2023-11-17 16:29:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:29:34,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006389867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:29:34,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:29:34,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 41 [2023-11-17 16:29:34,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746328249] [2023-11-17 16:29:34,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:29:34,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 16:29:34,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:29:34,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 16:29:34,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 16:29:34,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 307 [2023-11-17 16:29:34,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 2591 transitions, 37491 flow. Second operand has 42 states, 42 states have (on average 93.95238095238095) internal successors, (3946), 42 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:34,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:29:34,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 307 [2023-11-17 16:29:34,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:30:52,091 INFO L124 PetriNetUnfolderBase]: 68443/114335 cut-off events. [2023-11-17 16:30:52,091 INFO L125 PetriNetUnfolderBase]: For 5561737/5561737 co-relation queries the response was YES. [2023-11-17 16:30:55,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948936 conditions, 114335 events. 68443/114335 cut-off events. For 5561737/5561737 co-relation queries the response was YES. Maximal size of possible extension queue 3530. Compared 1046686 event pairs, 9029 based on Foata normal form. 836/115065 useless extension candidates. Maximal degree in co-relation 948747. Up to 25792 conditions per place. [2023-11-17 16:30:55,915 INFO L140 encePairwiseOnDemand]: 291/307 looper letters, 3243 selfloop transitions, 4548 changer transitions 1335/9126 dead transitions. [2023-11-17 16:30:55,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 902 places, 9126 transitions, 142319 flow [2023-11-17 16:30:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2023-11-17 16:30:55,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2023-11-17 16:30:55,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 23097 transitions. [2023-11-17 16:30:55,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3242867572728294 [2023-11-17 16:30:55,962 INFO L72 ComplementDD]: Start complementDD. Operand 232 states and 23097 transitions. [2023-11-17 16:30:55,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 232 states and 23097 transitions. [2023-11-17 16:30:55,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:30:55,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 232 states and 23097 transitions. [2023-11-17 16:30:56,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 233 states, 232 states have (on average 99.55603448275862) internal successors, (23097), 232 states have internal predecessors, (23097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:56,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 233 states, 233 states have (on average 307.0) internal successors, (71531), 233 states have internal predecessors, (71531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:56,116 INFO L81 ComplementDD]: Finished complementDD. Result has 233 states, 233 states have (on average 307.0) internal successors, (71531), 233 states have internal predecessors, (71531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:30:56,116 INFO L175 Difference]: Start difference. First operand has 675 places, 2591 transitions, 37491 flow. Second operand 232 states and 23097 transitions. [2023-11-17 16:30:56,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 902 places, 9126 transitions, 142319 flow [2023-11-17 16:32:22,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 884 places, 9126 transitions, 124581 flow, removed 8114 selfloop flow, removed 18 redundant places. [2023-11-17 16:32:22,755 INFO L231 Difference]: Finished difference. Result has 1019 places, 6071 transitions, 97994 flow [2023-11-17 16:32:22,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=32388, PETRI_DIFFERENCE_MINUEND_PLACES=653, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=232, PETRI_FLOW=97994, PETRI_PLACES=1019, PETRI_TRANSITIONS=6071} [2023-11-17 16:32:22,758 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 987 predicate places. [2023-11-17 16:32:22,759 INFO L495 AbstractCegarLoop]: Abstraction has has 1019 places, 6071 transitions, 97994 flow [2023-11-17 16:32:22,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 93.95238095238095) internal successors, (3946), 42 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:32:22,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:32:22,759 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:32:22,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-17 16:32:22,965 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 16:32:22,965 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:32:22,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:32:22,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1793415267, now seen corresponding path program 10 times [2023-11-17 16:32:22,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:32:22,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123691623] [2023-11-17 16:32:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:32:22,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:32:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:32:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:32:23,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:32:23,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123691623] [2023-11-17 16:32:23,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123691623] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:32:23,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664325181] [2023-11-17 16:32:23,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:32:23,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:32:23,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:32:23,994 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 16:32:23,996 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 16:32:24,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:32:24,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:32:24,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 16:32:24,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:32:24,482 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 16:32:24,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:32:24,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:32:24,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2023-11-17 16:32:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:32:24,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664325181] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:32:24,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:32:24,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 38 [2023-11-17 16:32:24,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859123154] [2023-11-17 16:32:24,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:32:24,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 16:32:24,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:32:24,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 16:32:24,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1346, Unknown=0, NotChecked=0, Total=1482 [2023-11-17 16:32:24,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 307 [2023-11-17 16:32:24,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1019 places, 6071 transitions, 97994 flow. Second operand has 39 states, 39 states have (on average 94.07692307692308) internal successors, (3669), 39 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:32:24,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:32:24,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 307 [2023-11-17 16:32:24,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand