/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/parallel-lamport.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:03:52,485 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:03:52,524 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 16:03:52,540 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:03:52,540 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:03:52,541 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:03:52,541 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:03:52,541 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:03:52,542 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:03:52,542 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:03:52,542 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:03:52,542 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:03:52,543 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:03:52,543 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:03:52,543 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:03:52,543 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:03:52,544 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:03:52,544 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:03:52,544 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:03:52,545 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:03:52,545 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:03:52,545 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:03:52,546 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:03:52,546 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:03:52,546 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:03:52,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:03:52,547 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:03:52,547 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:03:52,547 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:03:52,547 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:03:52,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:03:52,548 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:03:52,548 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:03:52,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:03:52,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:03:52,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:03:52,710 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:03:52,710 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:03:52,711 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-11-17 16:03:53,857 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:03:54,046 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:03:54,047 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-11-17 16:03:54,056 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f9adbd5c/15a00125501847d98c29bb01eb348602/FLAG3a5c227b8 [2023-11-17 16:03:54,073 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f9adbd5c/15a00125501847d98c29bb01eb348602 [2023-11-17 16:03:54,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:03:54,078 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:03:54,079 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:03:54,079 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:03:54,083 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:03:54,084 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:03:54" (1/1) ... [2023-11-17 16:03:54,085 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e56a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:03:54, skipping insertion in model container [2023-11-17 16:03:54,085 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:03:54" (1/1) ... [2023-11-17 16:03:54,117 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:03:54,298 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/parallel-lamport.wvr.c[4249,4262] [2023-11-17 16:03:54,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:03:54,327 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:03:54,366 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/parallel-lamport.wvr.c[4249,4262] [2023-11-17 16:03:54,368 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:03:54,374 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:03:54,374 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:03:54,381 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:03:54,382 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:03:54 WrapperNode [2023-11-17 16:03:54,383 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:03:54,384 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:03:54,384 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:03:54,384 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:03:54,389 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:03:54" (1/1) ... [2023-11-17 16:03:54,405 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:03:54" (1/1) ... [2023-11-17 16:03:54,437 INFO L138 Inliner]: procedures = 25, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 246 [2023-11-17 16:03:54,437 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:03:54,438 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:03:54,438 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:03:54,438 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:03:54,445 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:03:54" (1/1) ... [2023-11-17 16:03:54,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:03:54" (1/1) ... [2023-11-17 16:03:54,458 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:03:54" (1/1) ... [2023-11-17 16:03:54,459 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:03:54" (1/1) ... [2023-11-17 16:03:54,464 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:03:54" (1/1) ... [2023-11-17 16:03:54,476 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:03:54" (1/1) ... [2023-11-17 16:03:54,477 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:03:54" (1/1) ... [2023-11-17 16:03:54,478 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:03:54" (1/1) ... [2023-11-17 16:03:54,493 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:03:54,494 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:03:54,494 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:03:54,494 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:03:54,494 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:03:54" (1/1) ... [2023-11-17 16:03:54,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:03:54,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:03:54,529 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 16:03:54,536 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 16:03:54,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:03:54,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:03:54,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:03:54,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:03:54,552 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:03:54,552 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:03:54,552 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:03:54,552 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:03:54,552 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:03:54,552 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:03:54,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:03:54,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:03:54,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:03:54,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:03:54,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:03:54,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:03:54,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:03:54,554 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 16:03:54,645 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:03:54,647 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:03:54,907 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:03:54,983 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:03:54,984 INFO L307 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-17 16:03:54,985 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:03:54 BoogieIcfgContainer [2023-11-17 16:03:54,985 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:03:54,986 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:03:54,986 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:03:54,988 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:03:54,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:03:54" (1/3) ... [2023-11-17 16:03:54,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da4418e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:03:54, skipping insertion in model container [2023-11-17 16:03:54,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:03:54" (2/3) ... [2023-11-17 16:03:54,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da4418e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:03:54, skipping insertion in model container [2023-11-17 16:03:54,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:03:54" (3/3) ... [2023-11-17 16:03:54,990 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2023-11-17 16:03:55,003 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:03:55,003 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:03:55,004 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:03:55,076 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 16:03:55,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 194 transitions, 409 flow [2023-11-17 16:03:55,178 INFO L124 PetriNetUnfolderBase]: 7/191 cut-off events. [2023-11-17 16:03:55,178 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:03:55,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 191 events. 7/191 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 112 event pairs, 0 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2023-11-17 16:03:55,182 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 194 transitions, 409 flow [2023-11-17 16:03:55,191 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 180 transitions, 378 flow [2023-11-17 16:03:55,196 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:03:55,209 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 180 transitions, 378 flow [2023-11-17 16:03:55,211 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 180 transitions, 378 flow [2023-11-17 16:03:55,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 180 transitions, 378 flow [2023-11-17 16:03:55,247 INFO L124 PetriNetUnfolderBase]: 7/180 cut-off events. [2023-11-17 16:03:55,247 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:03:55,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 180 events. 7/180 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 112 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2023-11-17 16:03:55,252 INFO L119 LiptonReduction]: Number of co-enabled transitions 1460 [2023-11-17 16:04:00,627 INFO L134 LiptonReduction]: Checked pairs total: 6149 [2023-11-17 16:04:00,627 INFO L136 LiptonReduction]: Total number of compositions: 169 [2023-11-17 16:04:00,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:04:00,658 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;@5a978a52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:04:00,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 16:04:00,668 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:04:00,668 INFO L124 PetriNetUnfolderBase]: 1/31 cut-off events. [2023-11-17 16:04:00,669 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:04:00,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:00,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:00,670 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 16:04:00,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:00,674 INFO L85 PathProgramCache]: Analyzing trace with hash -922658475, now seen corresponding path program 1 times [2023-11-17 16:04:00,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:00,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823080265] [2023-11-17 16:04:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:00,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:01,034 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 16:04:01,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:01,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823080265] [2023-11-17 16:04:01,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823080265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:01,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:01,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:04:01,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131262323] [2023-11-17 16:04:01,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:01,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:04:01,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:01,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:04:01,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:04:01,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 363 [2023-11-17 16:04:01,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:01,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:01,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 363 [2023-11-17 16:04:01,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:01,224 INFO L124 PetriNetUnfolderBase]: 734/1222 cut-off events. [2023-11-17 16:04:01,224 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-11-17 16:04:01,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2567 conditions, 1222 events. 734/1222 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5186 event pairs, 733 based on Foata normal form. 0/1212 useless extension candidates. Maximal degree in co-relation 2363. Up to 1175 conditions per place. [2023-11-17 16:04:01,235 INFO L140 encePairwiseOnDemand]: 360/363 looper letters, 29 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-11-17 16:04:01,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 33 transitions, 146 flow [2023-11-17 16:04:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:04:01,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:04:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-11-17 16:04:01,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508723599632691 [2023-11-17 16:04:01,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-11-17 16:04:01,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-11-17 16:04:01,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:01,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-11-17 16:04:01,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:01,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:01,257 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:01,258 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 82 flow. Second operand 3 states and 491 transitions. [2023-11-17 16:04:01,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 33 transitions, 146 flow [2023-11-17 16:04:01,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 134 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 16:04:01,292 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 82 flow [2023-11-17 16:04:01,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-17 16:04:01,296 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2023-11-17 16:04:01,297 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 82 flow [2023-11-17 16:04:01,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:01,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:01,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:01,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:04:01,298 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 16:04:01,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:01,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1872401876, now seen corresponding path program 1 times [2023-11-17 16:04:01,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:01,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486388151] [2023-11-17 16:04:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:01,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:01,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:01,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486388151] [2023-11-17 16:04:01,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486388151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:01,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:01,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:04:01,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880963799] [2023-11-17 16:04:01,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:01,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:04:01,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:01,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:04:01,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:04:01,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 363 [2023-11-17 16:04:01,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:01,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:01,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 363 [2023-11-17 16:04:01,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:01,518 INFO L124 PetriNetUnfolderBase]: 728/1213 cut-off events. [2023-11-17 16:04:01,518 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 16:04:01,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2464 conditions, 1213 events. 728/1213 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5250 event pairs, 637 based on Foata normal form. 6/1211 useless extension candidates. Maximal degree in co-relation 2453. Up to 1028 conditions per place. [2023-11-17 16:04:01,524 INFO L140 encePairwiseOnDemand]: 360/363 looper letters, 41 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-17 16:04:01,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 194 flow [2023-11-17 16:04:01,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:04:01,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:04:01,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-11-17 16:04:01,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967860422405877 [2023-11-17 16:04:01,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-11-17 16:04:01,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-11-17 16:04:01,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:01,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-11-17 16:04:01,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:01,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:01,530 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:01,530 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 82 flow. Second operand 3 states and 541 transitions. [2023-11-17 16:04:01,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 194 flow [2023-11-17 16:04:01,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 190 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:04:01,531 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 86 flow [2023-11-17 16:04:01,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-11-17 16:04:01,532 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2023-11-17 16:04:01,532 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 86 flow [2023-11-17 16:04:01,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:01,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:01,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:01,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:04:01,533 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 16:04:01,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:01,534 INFO L85 PathProgramCache]: Analyzing trace with hash -945860744, now seen corresponding path program 2 times [2023-11-17 16:04:01,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:01,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312611676] [2023-11-17 16:04:01,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:01,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:01,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:01,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312611676] [2023-11-17 16:04:01,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312611676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:01,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:01,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 16:04:01,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954676983] [2023-11-17 16:04:01,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:01,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:01,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:01,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:01,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:04:01,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 363 [2023-11-17 16:04:01,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:01,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:01,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 363 [2023-11-17 16:04:01,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:01,986 INFO L124 PetriNetUnfolderBase]: 1284/2171 cut-off events. [2023-11-17 16:04:01,986 INFO L125 PetriNetUnfolderBase]: For 217/217 co-relation queries the response was YES. [2023-11-17 16:04:01,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4638 conditions, 2171 events. 1284/2171 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11303 event pairs, 359 based on Foata normal form. 30/2194 useless extension candidates. Maximal degree in co-relation 4622. Up to 695 conditions per place. [2023-11-17 16:04:01,996 INFO L140 encePairwiseOnDemand]: 355/363 looper letters, 101 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2023-11-17 16:04:01,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 119 transitions, 529 flow [2023-11-17 16:04:01,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:04:01,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:04:01,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1521 transitions. [2023-11-17 16:04:01,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465564738292011 [2023-11-17 16:04:01,999 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1521 transitions. [2023-11-17 16:04:02,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1521 transitions. [2023-11-17 16:04:02,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:02,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1521 transitions. [2023-11-17 16:04:02,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.0) internal successors, (1521), 9 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:02,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:02,008 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:02,008 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 86 flow. Second operand 9 states and 1521 transitions. [2023-11-17 16:04:02,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 119 transitions, 529 flow [2023-11-17 16:04:02,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 119 transitions, 515 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 16:04:02,010 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 182 flow [2023-11-17 16:04:02,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=182, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-11-17 16:04:02,011 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-11-17 16:04:02,011 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 182 flow [2023-11-17 16:04:02,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:02,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:02,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:02,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:04:02,012 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 16:04:02,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:02,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1118952452, now seen corresponding path program 3 times [2023-11-17 16:04:02,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:02,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940361940] [2023-11-17 16:04:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:02,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:02,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:02,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940361940] [2023-11-17 16:04:02,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940361940] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:02,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245255922] [2023-11-17 16:04:02,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:04:02,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:02,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:02,440 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 16:04:02,489 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 16:04:02,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 16:04:02,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:02,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:04:02,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:02,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:02,790 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:02,803 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:04:02,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245255922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:02,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:04:02,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2023-11-17 16:04:02,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275543113] [2023-11-17 16:04:02,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:02,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:02,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:02,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:02,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:04:02,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 363 [2023-11-17 16:04:02,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:02,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:02,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 363 [2023-11-17 16:04:02,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:03,408 INFO L124 PetriNetUnfolderBase]: 2359/3847 cut-off events. [2023-11-17 16:04:03,408 INFO L125 PetriNetUnfolderBase]: For 1532/1532 co-relation queries the response was YES. [2023-11-17 16:04:03,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9315 conditions, 3847 events. 2359/3847 cut-off events. For 1532/1532 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 20223 event pairs, 397 based on Foata normal form. 2/3848 useless extension candidates. Maximal degree in co-relation 9293. Up to 1748 conditions per place. [2023-11-17 16:04:03,426 INFO L140 encePairwiseOnDemand]: 355/363 looper letters, 140 selfloop transitions, 13 changer transitions 28/181 dead transitions. [2023-11-17 16:04:03,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 181 transitions, 1030 flow [2023-11-17 16:04:03,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:04:03,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:04:03,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1443 transitions. [2023-11-17 16:04:03,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44168962350780533 [2023-11-17 16:04:03,430 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1443 transitions. [2023-11-17 16:04:03,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1443 transitions. [2023-11-17 16:04:03,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:03,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1443 transitions. [2023-11-17 16:04:03,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.33333333333334) internal successors, (1443), 9 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:03,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:03,437 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:03,437 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 182 flow. Second operand 9 states and 1443 transitions. [2023-11-17 16:04:03,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 181 transitions, 1030 flow [2023-11-17 16:04:03,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 181 transitions, 1030 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 16:04:03,449 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 261 flow [2023-11-17 16:04:03,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=261, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2023-11-17 16:04:03,450 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2023-11-17 16:04:03,450 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 261 flow [2023-11-17 16:04:03,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:03,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:03,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:03,472 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 16:04:03,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:03,656 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 16:04:03,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:03,657 INFO L85 PathProgramCache]: Analyzing trace with hash -591973136, now seen corresponding path program 4 times [2023-11-17 16:04:03,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:03,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847028053] [2023-11-17 16:04:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:03,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:03,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:03,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847028053] [2023-11-17 16:04:03,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847028053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:03,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:03,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 16:04:03,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158339515] [2023-11-17 16:04:03,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:03,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:03,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:03,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:03,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:04:03,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 363 [2023-11-17 16:04:03,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 261 flow. Second operand has 7 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:03,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:03,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 363 [2023-11-17 16:04:03,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:04,350 INFO L124 PetriNetUnfolderBase]: 2852/4846 cut-off events. [2023-11-17 16:04:04,351 INFO L125 PetriNetUnfolderBase]: For 3235/3235 co-relation queries the response was YES. [2023-11-17 16:04:04,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13660 conditions, 4846 events. 2852/4846 cut-off events. For 3235/3235 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 29281 event pairs, 859 based on Foata normal form. 30/4838 useless extension candidates. Maximal degree in co-relation 13632. Up to 3022 conditions per place. [2023-11-17 16:04:04,372 INFO L140 encePairwiseOnDemand]: 355/363 looper letters, 152 selfloop transitions, 16 changer transitions 2/173 dead transitions. [2023-11-17 16:04:04,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 173 transitions, 1047 flow [2023-11-17 16:04:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:04:04,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:04:04,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1516 transitions. [2023-11-17 16:04:04,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640342822161004 [2023-11-17 16:04:04,375 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1516 transitions. [2023-11-17 16:04:04,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1516 transitions. [2023-11-17 16:04:04,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:04,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1516 transitions. [2023-11-17 16:04:04,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.44444444444446) internal successors, (1516), 9 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:04,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:04,382 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:04,382 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 261 flow. Second operand 9 states and 1516 transitions. [2023-11-17 16:04:04,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 173 transitions, 1047 flow [2023-11-17 16:04:04,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 173 transitions, 1041 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 16:04:04,392 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 400 flow [2023-11-17 16:04:04,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=400, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2023-11-17 16:04:04,393 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2023-11-17 16:04:04,393 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 400 flow [2023-11-17 16:04:04,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:04,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:04,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:04,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 16:04:04,394 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 16:04:04,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:04,394 INFO L85 PathProgramCache]: Analyzing trace with hash -588436346, now seen corresponding path program 5 times [2023-11-17 16:04:04,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:04,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302664520] [2023-11-17 16:04:04,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:04,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:04,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:04,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302664520] [2023-11-17 16:04:04,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302664520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:04,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:04,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:04:04,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044596217] [2023-11-17 16:04:04,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:04,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:04:04,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:04,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:04:04,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:04:04,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 363 [2023-11-17 16:04:04,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:04,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:04,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 363 [2023-11-17 16:04:04,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:04,769 INFO L124 PetriNetUnfolderBase]: 2654/4501 cut-off events. [2023-11-17 16:04:04,770 INFO L125 PetriNetUnfolderBase]: For 3931/3939 co-relation queries the response was YES. [2023-11-17 16:04:04,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13241 conditions, 4501 events. 2654/4501 cut-off events. For 3931/3939 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 26600 event pairs, 1916 based on Foata normal form. 18/4467 useless extension candidates. Maximal degree in co-relation 13208. Up to 4166 conditions per place. [2023-11-17 16:04:04,792 INFO L140 encePairwiseOnDemand]: 360/363 looper letters, 74 selfloop transitions, 9 changer transitions 1/87 dead transitions. [2023-11-17 16:04:04,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 619 flow [2023-11-17 16:04:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:04:04,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:04:04,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-11-17 16:04:04,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967860422405877 [2023-11-17 16:04:04,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-11-17 16:04:04,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-11-17 16:04:04,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:04,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-11-17 16:04:04,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:04,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:04,797 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:04,797 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 400 flow. Second operand 3 states and 541 transitions. [2023-11-17 16:04:04,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 619 flow [2023-11-17 16:04:04,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 87 transitions, 617 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 16:04:04,810 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 418 flow [2023-11-17 16:04:04,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=418, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2023-11-17 16:04:04,811 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2023-11-17 16:04:04,811 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 418 flow [2023-11-17 16:04:04,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:04,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:04,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:04,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 16:04:04,811 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 16:04:04,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1892038356, now seen corresponding path program 6 times [2023-11-17 16:04:04,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:04,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947167413] [2023-11-17 16:04:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:04,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:04,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:04,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947167413] [2023-11-17 16:04:04,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947167413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:04,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:04,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 16:04:04,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884202959] [2023-11-17 16:04:04,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:04,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:04,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:04,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:04,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:04:04,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 363 [2023-11-17 16:04:04,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:04,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:04,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 363 [2023-11-17 16:04:04,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:05,496 INFO L124 PetriNetUnfolderBase]: 2884/4997 cut-off events. [2023-11-17 16:04:05,496 INFO L125 PetriNetUnfolderBase]: For 5033/5033 co-relation queries the response was YES. [2023-11-17 16:04:05,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15039 conditions, 4997 events. 2884/4997 cut-off events. For 5033/5033 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 30866 event pairs, 1004 based on Foata normal form. 30/4975 useless extension candidates. Maximal degree in co-relation 15004. Up to 3406 conditions per place. [2023-11-17 16:04:05,517 INFO L140 encePairwiseOnDemand]: 355/363 looper letters, 164 selfloop transitions, 18 changer transitions 0/185 dead transitions. [2023-11-17 16:04:05,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 185 transitions, 1235 flow [2023-11-17 16:04:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:04:05,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:04:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1836 transitions. [2023-11-17 16:04:05,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598046581517656 [2023-11-17 16:04:05,521 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1836 transitions. [2023-11-17 16:04:05,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1836 transitions. [2023-11-17 16:04:05,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:05,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1836 transitions. [2023-11-17 16:04:05,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 166.9090909090909) internal successors, (1836), 11 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:05,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 363.0) internal successors, (4356), 12 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:05,529 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 363.0) internal successors, (4356), 12 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:05,529 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 418 flow. Second operand 11 states and 1836 transitions. [2023-11-17 16:04:05,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 185 transitions, 1235 flow [2023-11-17 16:04:05,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 185 transitions, 1213 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 16:04:05,539 INFO L231 Difference]: Finished difference. Result has 89 places, 79 transitions, 528 flow [2023-11-17 16:04:05,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=528, PETRI_PLACES=89, PETRI_TRANSITIONS=79} [2023-11-17 16:04:05,540 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2023-11-17 16:04:05,540 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 79 transitions, 528 flow [2023-11-17 16:04:05,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:05,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:05,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:05,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 16:04:05,541 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 16:04:05,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:05,541 INFO L85 PathProgramCache]: Analyzing trace with hash -635534802, now seen corresponding path program 7 times [2023-11-17 16:04:05,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:05,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436667508] [2023-11-17 16:04:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:05,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:05,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:05,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436667508] [2023-11-17 16:04:05,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436667508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:05,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391168338] [2023-11-17 16:04:05,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:04:05,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:05,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:05,812 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 16:04:05,833 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 16:04:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:05,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 16:04:05,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:06,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:06,381 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-11-17 16:04:06,382 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 47 [2023-11-17 16:04:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:06,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391168338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:06,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:06,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-11-17 16:04:06,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801185496] [2023-11-17 16:04:06,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:06,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 16:04:06,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:06,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 16:04:06,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-11-17 16:04:06,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 363 [2023-11-17 16:04:06,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 79 transitions, 528 flow. Second operand has 23 states, 23 states have (on average 134.7826086956522) internal successors, (3100), 23 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:06,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:06,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 363 [2023-11-17 16:04:06,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:07,882 INFO L124 PetriNetUnfolderBase]: 7352/12342 cut-off events. [2023-11-17 16:04:07,883 INFO L125 PetriNetUnfolderBase]: For 15592/15592 co-relation queries the response was YES. [2023-11-17 16:04:07,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38345 conditions, 12342 events. 7352/12342 cut-off events. For 15592/15592 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 84672 event pairs, 2354 based on Foata normal form. 17/12359 useless extension candidates. Maximal degree in co-relation 33444. Up to 4825 conditions per place. [2023-11-17 16:04:07,932 INFO L140 encePairwiseOnDemand]: 353/363 looper letters, 99 selfloop transitions, 9 changer transitions 222/330 dead transitions. [2023-11-17 16:04:07,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 330 transitions, 2817 flow [2023-11-17 16:04:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:04:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:04:07,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1610 transitions. [2023-11-17 16:04:07,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40320560981718007 [2023-11-17 16:04:07,936 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1610 transitions. [2023-11-17 16:04:07,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1610 transitions. [2023-11-17 16:04:07,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:07,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1610 transitions. [2023-11-17 16:04:07,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 146.36363636363637) internal successors, (1610), 11 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:07,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 363.0) internal successors, (4356), 12 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:07,944 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 363.0) internal successors, (4356), 12 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:07,944 INFO L175 Difference]: Start difference. First operand has 89 places, 79 transitions, 528 flow. Second operand 11 states and 1610 transitions. [2023-11-17 16:04:07,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 330 transitions, 2817 flow [2023-11-17 16:04:07,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 330 transitions, 2758 flow, removed 21 selfloop flow, removed 1 redundant places. [2023-11-17 16:04:07,991 INFO L231 Difference]: Finished difference. Result has 105 places, 80 transitions, 587 flow [2023-11-17 16:04:07,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=587, PETRI_PLACES=105, PETRI_TRANSITIONS=80} [2023-11-17 16:04:07,991 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2023-11-17 16:04:07,991 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 80 transitions, 587 flow [2023-11-17 16:04:07,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 134.7826086956522) internal successors, (3100), 23 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:07,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:07,993 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:08,000 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 16:04:08,196 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,SelfDestructingSolverStorable7 [2023-11-17 16:04:08,197 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 16:04:08,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:08,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1011364555, now seen corresponding path program 8 times [2023-11-17 16:04:08,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:08,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089322597] [2023-11-17 16:04:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:08,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:09,697 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 16:04:09,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:09,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089322597] [2023-11-17 16:04:09,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089322597] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:09,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046308476] [2023-11-17 16:04:09,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:04:09,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:09,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:09,699 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 16:04:09,746 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 16:04:09,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 16:04:09,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:09,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 16:04:09,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:09,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:09,927 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:09,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:04:09,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046308476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:09,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:04:09,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2023-11-17 16:04:09,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184030002] [2023-11-17 16:04:09,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:09,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:09,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:09,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:09,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:04:09,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 363 [2023-11-17 16:04:09,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 80 transitions, 587 flow. Second operand has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:09,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:09,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 363 [2023-11-17 16:04:09,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:10,926 INFO L124 PetriNetUnfolderBase]: 4388/7612 cut-off events. [2023-11-17 16:04:10,926 INFO L125 PetriNetUnfolderBase]: For 18123/18123 co-relation queries the response was YES. [2023-11-17 16:04:10,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29378 conditions, 7612 events. 4388/7612 cut-off events. For 18123/18123 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 50139 event pairs, 1044 based on Foata normal form. 6/7618 useless extension candidates. Maximal degree in co-relation 29325. Up to 2866 conditions per place. [2023-11-17 16:04:10,972 INFO L140 encePairwiseOnDemand]: 356/363 looper letters, 201 selfloop transitions, 16 changer transitions 40/257 dead transitions. [2023-11-17 16:04:10,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 257 transitions, 2272 flow [2023-11-17 16:04:10,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:04:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:04:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1447 transitions. [2023-11-17 16:04:10,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44291398836853385 [2023-11-17 16:04:10,976 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1447 transitions. [2023-11-17 16:04:10,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1447 transitions. [2023-11-17 16:04:10,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:10,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1447 transitions. [2023-11-17 16:04:10,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.77777777777777) internal successors, (1447), 9 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:10,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:10,982 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:10,982 INFO L175 Difference]: Start difference. First operand has 105 places, 80 transitions, 587 flow. Second operand 9 states and 1447 transitions. [2023-11-17 16:04:10,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 257 transitions, 2272 flow [2023-11-17 16:04:11,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 257 transitions, 2189 flow, removed 36 selfloop flow, removed 5 redundant places. [2023-11-17 16:04:11,078 INFO L231 Difference]: Finished difference. Result has 108 places, 89 transitions, 679 flow [2023-11-17 16:04:11,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=679, PETRI_PLACES=108, PETRI_TRANSITIONS=89} [2023-11-17 16:04:11,078 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2023-11-17 16:04:11,078 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 89 transitions, 679 flow [2023-11-17 16:04:11,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:11,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:11,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:11,087 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 16:04:11,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:11,287 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 16:04:11,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:11,287 INFO L85 PathProgramCache]: Analyzing trace with hash 350142943, now seen corresponding path program 9 times [2023-11-17 16:04:11,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:11,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812540552] [2023-11-17 16:04:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:11,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:12,879 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 16:04:12,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:12,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812540552] [2023-11-17 16:04:12,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812540552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:12,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224369272] [2023-11-17 16:04:12,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:04:12,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:12,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:12,895 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 16:04:12,936 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 16:04:13,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 16:04:13,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:13,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 16:04:13,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:13,197 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:13,198 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:13,208 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:04:13,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224369272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:13,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:04:13,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 19 [2023-11-17 16:04:13,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431370936] [2023-11-17 16:04:13,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:13,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:04:13,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:13,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:04:13,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:04:13,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 363 [2023-11-17 16:04:13,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 89 transitions, 679 flow. Second operand has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:13,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:13,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 363 [2023-11-17 16:04:13,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:14,348 INFO L124 PetriNetUnfolderBase]: 4482/7912 cut-off events. [2023-11-17 16:04:14,348 INFO L125 PetriNetUnfolderBase]: For 19296/19296 co-relation queries the response was YES. [2023-11-17 16:04:14,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30959 conditions, 7912 events. 4482/7912 cut-off events. For 19296/19296 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 53190 event pairs, 1564 based on Foata normal form. 6/7918 useless extension candidates. Maximal degree in co-relation 30905. Up to 5477 conditions per place. [2023-11-17 16:04:14,408 INFO L140 encePairwiseOnDemand]: 355/363 looper letters, 153 selfloop transitions, 17 changer transitions 49/219 dead transitions. [2023-11-17 16:04:14,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 219 transitions, 1970 flow [2023-11-17 16:04:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:04:14,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:04:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1567 transitions. [2023-11-17 16:04:14,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43168044077134987 [2023-11-17 16:04:14,412 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1567 transitions. [2023-11-17 16:04:14,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1567 transitions. [2023-11-17 16:04:14,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:14,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1567 transitions. [2023-11-17 16:04:14,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 156.7) internal successors, (1567), 10 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:14,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 363.0) internal successors, (3993), 11 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:14,420 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 363.0) internal successors, (3993), 11 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:14,420 INFO L175 Difference]: Start difference. First operand has 108 places, 89 transitions, 679 flow. Second operand 10 states and 1567 transitions. [2023-11-17 16:04:14,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 219 transitions, 1970 flow [2023-11-17 16:04:14,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 219 transitions, 1940 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-11-17 16:04:14,516 INFO L231 Difference]: Finished difference. Result has 115 places, 96 transitions, 779 flow [2023-11-17 16:04:14,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=779, PETRI_PLACES=115, PETRI_TRANSITIONS=96} [2023-11-17 16:04:14,517 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2023-11-17 16:04:14,517 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 96 transitions, 779 flow [2023-11-17 16:04:14,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:14,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:14,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:14,525 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 16:04:14,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:14,724 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 16:04:14,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:14,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1040736245, now seen corresponding path program 10 times [2023-11-17 16:04:14,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:14,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878207955] [2023-11-17 16:04:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:14,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:15,750 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 16:04:15,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:15,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878207955] [2023-11-17 16:04:15,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878207955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:15,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540217230] [2023-11-17 16:04:15,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:04:15,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:15,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:15,769 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 16:04:15,770 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 16:04:15,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:04:15,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:15,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:04:15,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:15,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:15,980 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:15,987 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:04:15,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540217230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:15,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:04:15,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2023-11-17 16:04:15,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680057112] [2023-11-17 16:04:15,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:15,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:15,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:15,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:15,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:04:15,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 363 [2023-11-17 16:04:15,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 96 transitions, 779 flow. Second operand has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:15,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:15,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 363 [2023-11-17 16:04:15,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:17,216 INFO L124 PetriNetUnfolderBase]: 5346/9407 cut-off events. [2023-11-17 16:04:17,217 INFO L125 PetriNetUnfolderBase]: For 27470/27470 co-relation queries the response was YES. [2023-11-17 16:04:17,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37545 conditions, 9407 events. 5346/9407 cut-off events. For 27470/27470 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 65918 event pairs, 1002 based on Foata normal form. 6/9413 useless extension candidates. Maximal degree in co-relation 37490. Up to 4981 conditions per place. [2023-11-17 16:04:17,261 INFO L140 encePairwiseOnDemand]: 354/363 looper letters, 201 selfloop transitions, 22 changer transitions 45/268 dead transitions. [2023-11-17 16:04:17,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 268 transitions, 2441 flow [2023-11-17 16:04:17,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:04:17,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:04:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1448 transitions. [2023-11-17 16:04:17,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44322007958371595 [2023-11-17 16:04:17,264 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1448 transitions. [2023-11-17 16:04:17,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1448 transitions. [2023-11-17 16:04:17,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:17,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1448 transitions. [2023-11-17 16:04:17,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.88888888888889) internal successors, (1448), 9 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:17,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:17,269 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:17,269 INFO L175 Difference]: Start difference. First operand has 115 places, 96 transitions, 779 flow. Second operand 9 states and 1448 transitions. [2023-11-17 16:04:17,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 268 transitions, 2441 flow [2023-11-17 16:04:17,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 268 transitions, 2405 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-11-17 16:04:17,398 INFO L231 Difference]: Finished difference. Result has 124 places, 105 transitions, 896 flow [2023-11-17 16:04:17,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=896, PETRI_PLACES=124, PETRI_TRANSITIONS=105} [2023-11-17 16:04:17,398 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2023-11-17 16:04:17,399 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 105 transitions, 896 flow [2023-11-17 16:04:17,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:17,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:17,399 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:17,418 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 16:04:17,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-17 16:04:17,604 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 16:04:17,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:17,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1557985145, now seen corresponding path program 11 times [2023-11-17 16:04:17,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:17,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019663291] [2023-11-17 16:04:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:17,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:18,761 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 16:04:18,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:18,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019663291] [2023-11-17 16:04:18,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019663291] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:18,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056309713] [2023-11-17 16:04:18,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:04:18,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:18,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:18,778 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 16:04:18,783 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 16:04:18,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:04:18,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:18,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:04:18,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:19,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:19,051 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:19,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:19,189 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-17 16:04:19,189 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-17 16:04:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:19,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056309713] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:19,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:04:19,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 7] total 21 [2023-11-17 16:04:19,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755104292] [2023-11-17 16:04:19,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:19,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:19,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:19,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:19,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:04:19,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 363 [2023-11-17 16:04:19,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 105 transitions, 896 flow. Second operand has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:19,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:19,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 363 [2023-11-17 16:04:19,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:20,332 INFO L124 PetriNetUnfolderBase]: 5579/9891 cut-off events. [2023-11-17 16:04:20,332 INFO L125 PetriNetUnfolderBase]: For 36738/36738 co-relation queries the response was YES. [2023-11-17 16:04:20,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42360 conditions, 9891 events. 5579/9891 cut-off events. For 36738/36738 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 70434 event pairs, 1103 based on Foata normal form. 6/9897 useless extension candidates. Maximal degree in co-relation 42300. Up to 5625 conditions per place. [2023-11-17 16:04:20,424 INFO L140 encePairwiseOnDemand]: 354/363 looper letters, 230 selfloop transitions, 24 changer transitions 28/282 dead transitions. [2023-11-17 16:04:20,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 282 transitions, 2627 flow [2023-11-17 16:04:20,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:04:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:04:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1604 transitions. [2023-11-17 16:04:20,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418732782369146 [2023-11-17 16:04:20,428 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1604 transitions. [2023-11-17 16:04:20,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1604 transitions. [2023-11-17 16:04:20,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:20,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1604 transitions. [2023-11-17 16:04:20,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 160.4) internal successors, (1604), 10 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:20,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 363.0) internal successors, (3993), 11 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:20,434 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 363.0) internal successors, (3993), 11 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:20,434 INFO L175 Difference]: Start difference. First operand has 124 places, 105 transitions, 896 flow. Second operand 10 states and 1604 transitions. [2023-11-17 16:04:20,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 282 transitions, 2627 flow [2023-11-17 16:04:20,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 282 transitions, 2564 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-11-17 16:04:20,626 INFO L231 Difference]: Finished difference. Result has 129 places, 108 transitions, 942 flow [2023-11-17 16:04:20,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=942, PETRI_PLACES=129, PETRI_TRANSITIONS=108} [2023-11-17 16:04:20,626 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2023-11-17 16:04:20,627 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 108 transitions, 942 flow [2023-11-17 16:04:20,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:20,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:20,627 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:20,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-17 16:04:20,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:20,833 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 16:04:20,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:20,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1119475903, now seen corresponding path program 12 times [2023-11-17 16:04:20,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:20,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151944632] [2023-11-17 16:04:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:20,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:22,563 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 16:04:22,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:22,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151944632] [2023-11-17 16:04:22,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151944632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:22,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955906710] [2023-11-17 16:04:22,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:04:22,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:22,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:22,565 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 16:04:22,567 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 16:04:22,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-17 16:04:22,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:22,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 16:04:22,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:22,762 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:22,763 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:22,765 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:04:22,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955906710] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:22,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:04:22,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 17 [2023-11-17 16:04:22,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305610833] [2023-11-17 16:04:22,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:22,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:22,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:22,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:22,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:04:22,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 363 [2023-11-17 16:04:22,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 108 transitions, 942 flow. Second operand has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:22,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:22,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 363 [2023-11-17 16:04:22,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:23,722 INFO L124 PetriNetUnfolderBase]: 5233/9277 cut-off events. [2023-11-17 16:04:23,722 INFO L125 PetriNetUnfolderBase]: For 35206/35206 co-relation queries the response was YES. [2023-11-17 16:04:23,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40275 conditions, 9277 events. 5233/9277 cut-off events. For 35206/35206 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 65259 event pairs, 1123 based on Foata normal form. 6/9283 useless extension candidates. Maximal degree in co-relation 40213. Up to 5273 conditions per place. [2023-11-17 16:04:23,782 INFO L140 encePairwiseOnDemand]: 354/363 looper letters, 199 selfloop transitions, 23 changer transitions 35/257 dead transitions. [2023-11-17 16:04:23,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 257 transitions, 2435 flow [2023-11-17 16:04:23,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:04:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:04:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1298 transitions. [2023-11-17 16:04:23,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2023-11-17 16:04:23,785 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1298 transitions. [2023-11-17 16:04:23,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1298 transitions. [2023-11-17 16:04:23,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:23,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1298 transitions. [2023-11-17 16:04:23,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 162.25) internal successors, (1298), 8 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:23,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 363.0) internal successors, (3267), 9 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:23,790 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 363.0) internal successors, (3267), 9 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:23,790 INFO L175 Difference]: Start difference. First operand has 129 places, 108 transitions, 942 flow. Second operand 8 states and 1298 transitions. [2023-11-17 16:04:23,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 257 transitions, 2435 flow [2023-11-17 16:04:23,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 257 transitions, 2361 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-11-17 16:04:23,967 INFO L231 Difference]: Finished difference. Result has 129 places, 107 transitions, 912 flow [2023-11-17 16:04:23,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=912, PETRI_PLACES=129, PETRI_TRANSITIONS=107} [2023-11-17 16:04:23,968 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2023-11-17 16:04:23,968 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 107 transitions, 912 flow [2023-11-17 16:04:23,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:23,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:23,968 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:23,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-17 16:04:24,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:24,180 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 16:04:24,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:24,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1663524013, now seen corresponding path program 13 times [2023-11-17 16:04:24,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:24,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578161510] [2023-11-17 16:04:24,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:24,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:25,201 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 16:04:25,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:25,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578161510] [2023-11-17 16:04:25,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578161510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:25,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106194239] [2023-11-17 16:04:25,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:04:25,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:25,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:25,213 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 16:04:25,214 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 16:04:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:25,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 16:04:25,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:25,321 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 120 treesize of output 116 [2023-11-17 16:04:25,449 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 16:04:25,542 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:25,543 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:25,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:25,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:25,685 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-11-17 16:04:25,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:25,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 52 [2023-11-17 16:04:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:25,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106194239] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:25,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:04:25,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 9] total 24 [2023-11-17 16:04:25,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150741496] [2023-11-17 16:04:25,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:25,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:04:25,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:25,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:04:25,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=567, Unknown=1, NotChecked=0, Total=650 [2023-11-17 16:04:25,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 363 [2023-11-17 16:04:25,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 107 transitions, 912 flow. Second operand has 10 states, 10 states have (on average 140.2) internal successors, (1402), 10 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:25,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:25,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 363 [2023-11-17 16:04:25,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:26,950 INFO L124 PetriNetUnfolderBase]: 5531/9916 cut-off events. [2023-11-17 16:04:26,951 INFO L125 PetriNetUnfolderBase]: For 35768/35768 co-relation queries the response was YES. [2023-11-17 16:04:26,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42463 conditions, 9916 events. 5531/9916 cut-off events. For 35768/35768 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 71455 event pairs, 1271 based on Foata normal form. 6/9922 useless extension candidates. Maximal degree in co-relation 42402. Up to 4629 conditions per place. [2023-11-17 16:04:27,009 INFO L140 encePairwiseOnDemand]: 354/363 looper letters, 199 selfloop transitions, 26 changer transitions 47/272 dead transitions. [2023-11-17 16:04:27,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 272 transitions, 2587 flow [2023-11-17 16:04:27,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:04:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:04:27,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1504 transitions. [2023-11-17 16:04:27,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143250688705234 [2023-11-17 16:04:27,024 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1504 transitions. [2023-11-17 16:04:27,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1504 transitions. [2023-11-17 16:04:27,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:27,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1504 transitions. [2023-11-17 16:04:27,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 150.4) internal successors, (1504), 10 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:27,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 363.0) internal successors, (3993), 11 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:27,045 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 363.0) internal successors, (3993), 11 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:27,045 INFO L175 Difference]: Start difference. First operand has 129 places, 107 transitions, 912 flow. Second operand 10 states and 1504 transitions. [2023-11-17 16:04:27,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 272 transitions, 2587 flow [2023-11-17 16:04:27,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 272 transitions, 2528 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-11-17 16:04:27,220 INFO L231 Difference]: Finished difference. Result has 133 places, 111 transitions, 992 flow [2023-11-17 16:04:27,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=992, PETRI_PLACES=133, PETRI_TRANSITIONS=111} [2023-11-17 16:04:27,222 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2023-11-17 16:04:27,222 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 111 transitions, 992 flow [2023-11-17 16:04:27,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 140.2) internal successors, (1402), 10 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:27,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:27,222 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:27,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-17 16:04:27,427 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,SelfDestructingSolverStorable13 [2023-11-17 16:04:27,428 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:04:27,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:27,428 INFO L85 PathProgramCache]: Analyzing trace with hash -285510639, now seen corresponding path program 14 times [2023-11-17 16:04:27,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:27,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142820746] [2023-11-17 16:04:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:27,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:28,711 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 16:04:28,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:28,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142820746] [2023-11-17 16:04:28,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142820746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:28,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246317783] [2023-11-17 16:04:28,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:04:28,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:28,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:28,712 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 16:04:28,721 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 16:04:28,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 16:04:28,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:28,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 16:04:28,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:28,816 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 323 treesize of output 315 [2023-11-17 16:04:28,914 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 16:04:29,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:29,025 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:29,029 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:04:29,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246317783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:29,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:04:29,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 20 [2023-11-17 16:04:29,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835436260] [2023-11-17 16:04:29,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:29,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:04:29,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:29,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:04:29,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:04:29,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 363 [2023-11-17 16:04:29,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 111 transitions, 992 flow. Second operand has 11 states, 11 states have (on average 139.9090909090909) internal successors, (1539), 11 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:29,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:29,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 363 [2023-11-17 16:04:29,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:30,292 INFO L124 PetriNetUnfolderBase]: 5581/10095 cut-off events. [2023-11-17 16:04:30,292 INFO L125 PetriNetUnfolderBase]: For 39520/39520 co-relation queries the response was YES. [2023-11-17 16:04:30,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43417 conditions, 10095 events. 5581/10095 cut-off events. For 39520/39520 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 73717 event pairs, 1266 based on Foata normal form. 6/10101 useless extension candidates. Maximal degree in co-relation 43352. Up to 5479 conditions per place. [2023-11-17 16:04:30,352 INFO L140 encePairwiseOnDemand]: 354/363 looper letters, 228 selfloop transitions, 26 changer transitions 30/284 dead transitions. [2023-11-17 16:04:30,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 284 transitions, 2715 flow [2023-11-17 16:04:30,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:04:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:04:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1651 transitions. [2023-11-17 16:04:30,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41347357876283497 [2023-11-17 16:04:30,369 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1651 transitions. [2023-11-17 16:04:30,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1651 transitions. [2023-11-17 16:04:30,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:30,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1651 transitions. [2023-11-17 16:04:30,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 150.0909090909091) internal successors, (1651), 11 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:30,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 363.0) internal successors, (4356), 12 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:30,384 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 363.0) internal successors, (4356), 12 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:30,384 INFO L175 Difference]: Start difference. First operand has 133 places, 111 transitions, 992 flow. Second operand 11 states and 1651 transitions. [2023-11-17 16:04:30,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 284 transitions, 2715 flow [2023-11-17 16:04:30,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 284 transitions, 2657 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-11-17 16:04:30,539 INFO L231 Difference]: Finished difference. Result has 138 places, 112 transitions, 1031 flow [2023-11-17 16:04:30,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1031, PETRI_PLACES=138, PETRI_TRANSITIONS=112} [2023-11-17 16:04:30,539 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2023-11-17 16:04:30,539 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 112 transitions, 1031 flow [2023-11-17 16:04:30,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.9090909090909) internal successors, (1539), 11 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:30,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:30,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:30,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:30,744 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,SelfDestructingSolverStorable14 [2023-11-17 16:04:30,745 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:04:30,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:30,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1296160125, now seen corresponding path program 15 times [2023-11-17 16:04:30,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:30,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958205467] [2023-11-17 16:04:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:30,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:32,127 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 16:04:32,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:32,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958205467] [2023-11-17 16:04:32,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958205467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:32,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558861891] [2023-11-17 16:04:32,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:04:32,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:32,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:32,129 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 16:04:32,131 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 16:04:32,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 16:04:32,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:32,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:04:32,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:32,235 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 16:04:32,336 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 16:04:32,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:32,401 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:32,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:04:32,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558861891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:32,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:04:32,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2023-11-17 16:04:32,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524422110] [2023-11-17 16:04:32,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:32,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:04:32,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:32,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:04:32,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:04:32,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 363 [2023-11-17 16:04:32,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 112 transitions, 1031 flow. Second operand has 10 states, 10 states have (on average 140.2) internal successors, (1402), 10 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:32,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:32,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 363 [2023-11-17 16:04:32,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:33,555 INFO L124 PetriNetUnfolderBase]: 5235/9481 cut-off events. [2023-11-17 16:04:33,556 INFO L125 PetriNetUnfolderBase]: For 40569/40569 co-relation queries the response was YES. [2023-11-17 16:04:33,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41149 conditions, 9481 events. 5235/9481 cut-off events. For 40569/40569 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 68455 event pairs, 1257 based on Foata normal form. 6/9487 useless extension candidates. Maximal degree in co-relation 41083. Up to 5127 conditions per place. [2023-11-17 16:04:33,608 INFO L140 encePairwiseOnDemand]: 354/363 looper letters, 156 selfloop transitions, 21 changer transitions 82/259 dead transitions. [2023-11-17 16:04:33,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 259 transitions, 2517 flow [2023-11-17 16:04:33,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:04:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:04:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1363 transitions. [2023-11-17 16:04:33,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4172023262932354 [2023-11-17 16:04:33,610 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1363 transitions. [2023-11-17 16:04:33,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1363 transitions. [2023-11-17 16:04:33,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:33,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1363 transitions. [2023-11-17 16:04:33,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.44444444444446) internal successors, (1363), 9 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:33,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:33,614 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:33,615 INFO L175 Difference]: Start difference. First operand has 138 places, 112 transitions, 1031 flow. Second operand 9 states and 1363 transitions. [2023-11-17 16:04:33,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 259 transitions, 2517 flow [2023-11-17 16:04:33,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 259 transitions, 2435 flow, removed 17 selfloop flow, removed 8 redundant places. [2023-11-17 16:04:33,803 INFO L231 Difference]: Finished difference. Result has 138 places, 99 transitions, 882 flow [2023-11-17 16:04:33,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=882, PETRI_PLACES=138, PETRI_TRANSITIONS=99} [2023-11-17 16:04:33,803 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2023-11-17 16:04:33,804 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 99 transitions, 882 flow [2023-11-17 16:04:33,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 140.2) internal successors, (1402), 10 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:33,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:33,804 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:33,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-17 16:04:34,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 16:04:34,009 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:04:34,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:34,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1786795449, now seen corresponding path program 16 times [2023-11-17 16:04:34,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:34,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394161981] [2023-11-17 16:04:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:34,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:34,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:34,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394161981] [2023-11-17 16:04:34,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394161981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:34,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:34,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 16:04:34,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686719835] [2023-11-17 16:04:34,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:34,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:34,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:34,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:34,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:04:34,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 363 [2023-11-17 16:04:34,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 99 transitions, 882 flow. Second operand has 7 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:34,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:34,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 363 [2023-11-17 16:04:34,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:34,742 INFO L124 PetriNetUnfolderBase]: 3073/5687 cut-off events. [2023-11-17 16:04:34,742 INFO L125 PetriNetUnfolderBase]: For 25368/25406 co-relation queries the response was YES. [2023-11-17 16:04:34,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24400 conditions, 5687 events. 3073/5687 cut-off events. For 25368/25406 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 38752 event pairs, 1698 based on Foata normal form. 42/5683 useless extension candidates. Maximal degree in co-relation 24335. Up to 5206 conditions per place. [2023-11-17 16:04:34,770 INFO L140 encePairwiseOnDemand]: 356/363 looper letters, 93 selfloop transitions, 7 changer transitions 33/138 dead transitions. [2023-11-17 16:04:34,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 138 transitions, 1397 flow [2023-11-17 16:04:34,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:04:34,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:04:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1326 transitions. [2023-11-17 16:04:34,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2023-11-17 16:04:34,771 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1326 transitions. [2023-11-17 16:04:34,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1326 transitions. [2023-11-17 16:04:34,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:34,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1326 transitions. [2023-11-17 16:04:34,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 165.75) internal successors, (1326), 8 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:34,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 363.0) internal successors, (3267), 9 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:34,775 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 363.0) internal successors, (3267), 9 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:34,775 INFO L175 Difference]: Start difference. First operand has 138 places, 99 transitions, 882 flow. Second operand 8 states and 1326 transitions. [2023-11-17 16:04:34,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 138 transitions, 1397 flow [2023-11-17 16:04:34,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 138 transitions, 1277 flow, removed 15 selfloop flow, removed 14 redundant places. [2023-11-17 16:04:34,840 INFO L231 Difference]: Finished difference. Result has 122 places, 92 transitions, 761 flow [2023-11-17 16:04:34,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=761, PETRI_PLACES=122, PETRI_TRANSITIONS=92} [2023-11-17 16:04:34,841 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2023-11-17 16:04:34,841 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 92 transitions, 761 flow [2023-11-17 16:04:34,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:34,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:34,841 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:34,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-17 16:04:34,841 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:04:34,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:34,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1956555305, now seen corresponding path program 17 times [2023-11-17 16:04:34,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:34,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840533372] [2023-11-17 16:04:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:34,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:34,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:34,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840533372] [2023-11-17 16:04:34,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840533372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:34,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:34,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 16:04:34,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782444666] [2023-11-17 16:04:34,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:34,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:34,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:34,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:34,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:04:34,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 363 [2023-11-17 16:04:34,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 92 transitions, 761 flow. Second operand has 7 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:34,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:34,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 363 [2023-11-17 16:04:34,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:35,372 INFO L124 PetriNetUnfolderBase]: 2159/4090 cut-off events. [2023-11-17 16:04:35,372 INFO L125 PetriNetUnfolderBase]: For 14348/14375 co-relation queries the response was YES. [2023-11-17 16:04:35,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16607 conditions, 4090 events. 2159/4090 cut-off events. For 14348/14375 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 26879 event pairs, 613 based on Foata normal form. 42/4110 useless extension candidates. Maximal degree in co-relation 16548. Up to 905 conditions per place. [2023-11-17 16:04:35,400 INFO L140 encePairwiseOnDemand]: 355/363 looper letters, 176 selfloop transitions, 25 changer transitions 12/218 dead transitions. [2023-11-17 16:04:35,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 218 transitions, 2144 flow [2023-11-17 16:04:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:04:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:04:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1512 transitions. [2023-11-17 16:04:35,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628099173553719 [2023-11-17 16:04:35,402 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1512 transitions. [2023-11-17 16:04:35,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1512 transitions. [2023-11-17 16:04:35,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:35,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1512 transitions. [2023-11-17 16:04:35,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.0) internal successors, (1512), 9 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:35,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:35,406 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:35,406 INFO L175 Difference]: Start difference. First operand has 122 places, 92 transitions, 761 flow. Second operand 9 states and 1512 transitions. [2023-11-17 16:04:35,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 218 transitions, 2144 flow [2023-11-17 16:04:35,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 218 transitions, 2120 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-11-17 16:04:35,451 INFO L231 Difference]: Finished difference. Result has 122 places, 97 transitions, 864 flow [2023-11-17 16:04:35,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=864, PETRI_PLACES=122, PETRI_TRANSITIONS=97} [2023-11-17 16:04:35,451 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2023-11-17 16:04:35,451 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 97 transitions, 864 flow [2023-11-17 16:04:35,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:35,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:35,452 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:35,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-17 16:04:35,452 INFO L420 AbstractCegarLoop]: === Iteration 19 === 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 16:04:35,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:35,452 INFO L85 PathProgramCache]: Analyzing trace with hash -424793205, now seen corresponding path program 18 times [2023-11-17 16:04:35,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:35,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480137787] [2023-11-17 16:04:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:35,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:35,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:35,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480137787] [2023-11-17 16:04:35,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480137787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:35,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:35,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 16:04:35,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038284937] [2023-11-17 16:04:35,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:35,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:35,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:35,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:35,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:04:35,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 363 [2023-11-17 16:04:35,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 97 transitions, 864 flow. Second operand has 7 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:35,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:35,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 363 [2023-11-17 16:04:35,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:35,860 INFO L124 PetriNetUnfolderBase]: 1222/2350 cut-off events. [2023-11-17 16:04:35,861 INFO L125 PetriNetUnfolderBase]: For 8881/8901 co-relation queries the response was YES. [2023-11-17 16:04:35,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9699 conditions, 2350 events. 1222/2350 cut-off events. For 8881/8901 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 14120 event pairs, 678 based on Foata normal form. 42/2376 useless extension candidates. Maximal degree in co-relation 9655. Up to 1938 conditions per place. [2023-11-17 16:04:35,874 INFO L140 encePairwiseOnDemand]: 356/363 looper letters, 67 selfloop transitions, 4 changer transitions 36/111 dead transitions. [2023-11-17 16:04:35,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 111 transitions, 1035 flow [2023-11-17 16:04:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:04:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:04:35,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1162 transitions. [2023-11-17 16:04:35,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573002754820937 [2023-11-17 16:04:35,875 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1162 transitions. [2023-11-17 16:04:35,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1162 transitions. [2023-11-17 16:04:35,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:35,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1162 transitions. [2023-11-17 16:04:35,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:35,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 363.0) internal successors, (2904), 8 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:35,878 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 363.0) internal successors, (2904), 8 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:35,878 INFO L175 Difference]: Start difference. First operand has 122 places, 97 transitions, 864 flow. Second operand 7 states and 1162 transitions. [2023-11-17 16:04:35,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 111 transitions, 1035 flow [2023-11-17 16:04:35,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 111 transitions, 927 flow, removed 30 selfloop flow, removed 15 redundant places. [2023-11-17 16:04:35,905 INFO L231 Difference]: Finished difference. Result has 109 places, 66 transitions, 456 flow [2023-11-17 16:04:35,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=456, PETRI_PLACES=109, PETRI_TRANSITIONS=66} [2023-11-17 16:04:35,906 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2023-11-17 16:04:35,906 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 66 transitions, 456 flow [2023-11-17 16:04:35,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:35,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:35,906 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:35,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-17 16:04:35,907 INFO L420 AbstractCegarLoop]: === Iteration 20 === 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 16:04:35,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash -876367665, now seen corresponding path program 19 times [2023-11-17 16:04:35,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:35,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154223506] [2023-11-17 16:04:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:35,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:36,688 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 16:04:36,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:36,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154223506] [2023-11-17 16:04:36,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154223506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:36,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154237337] [2023-11-17 16:04:36,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:04:36,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:36,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:36,690 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:36,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 16:04:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:36,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:04:36,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:36,949 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:36,950 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:36,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:37,050 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-17 16:04:37,050 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-17 16:04:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:37,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154237337] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:37,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:04:37,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 7] total 20 [2023-11-17 16:04:37,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112516431] [2023-11-17 16:04:37,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:37,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:37,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:37,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:37,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:04:37,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 363 [2023-11-17 16:04:37,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 66 transitions, 456 flow. Second operand has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:37,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:37,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 363 [2023-11-17 16:04:37,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:37,403 INFO L124 PetriNetUnfolderBase]: 1024/1900 cut-off events. [2023-11-17 16:04:37,403 INFO L125 PetriNetUnfolderBase]: For 4759/4759 co-relation queries the response was YES. [2023-11-17 16:04:37,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7214 conditions, 1900 events. 1024/1900 cut-off events. For 4759/4759 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 9819 event pairs, 524 based on Foata normal form. 2/1902 useless extension candidates. Maximal degree in co-relation 7179. Up to 1282 conditions per place. [2023-11-17 16:04:37,411 INFO L140 encePairwiseOnDemand]: 356/363 looper letters, 74 selfloop transitions, 5 changer transitions 42/121 dead transitions. [2023-11-17 16:04:37,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 121 transitions, 1013 flow [2023-11-17 16:04:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:04:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:04:37,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1253 transitions. [2023-11-17 16:04:37,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43147382920110194 [2023-11-17 16:04:37,414 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1253 transitions. [2023-11-17 16:04:37,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1253 transitions. [2023-11-17 16:04:37,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:37,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1253 transitions. [2023-11-17 16:04:37,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 156.625) internal successors, (1253), 8 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:37,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 363.0) internal successors, (3267), 9 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:37,430 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 363.0) internal successors, (3267), 9 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:37,430 INFO L175 Difference]: Start difference. First operand has 109 places, 66 transitions, 456 flow. Second operand 8 states and 1253 transitions. [2023-11-17 16:04:37,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 121 transitions, 1013 flow [2023-11-17 16:04:37,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 121 transitions, 978 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-11-17 16:04:37,452 INFO L231 Difference]: Finished difference. Result has 104 places, 65 transitions, 446 flow [2023-11-17 16:04:37,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=446, PETRI_PLACES=104, PETRI_TRANSITIONS=65} [2023-11-17 16:04:37,452 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2023-11-17 16:04:37,452 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 65 transitions, 446 flow [2023-11-17 16:04:37,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:37,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:37,453 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:37,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-17 16:04:37,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:37,653 INFO L420 AbstractCegarLoop]: === Iteration 21 === 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 16:04:37,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2030965895, now seen corresponding path program 20 times [2023-11-17 16:04:37,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:37,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12304335] [2023-11-17 16:04:37,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:37,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:38,779 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 16:04:38,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:38,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12304335] [2023-11-17 16:04:38,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12304335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:38,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307001263] [2023-11-17 16:04:38,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:04:38,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:38,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:38,781 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:38,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 16:04:38,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 16:04:38,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:38,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 16:04:38,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:38,972 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:38,973 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:38,980 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:04:38,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307001263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:38,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:04:38,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2023-11-17 16:04:38,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184956766] [2023-11-17 16:04:38,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:38,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:38,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:38,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:38,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:04:38,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 363 [2023-11-17 16:04:38,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 65 transitions, 446 flow. Second operand has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:38,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:38,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 363 [2023-11-17 16:04:38,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:39,347 INFO L124 PetriNetUnfolderBase]: 904/1730 cut-off events. [2023-11-17 16:04:39,347 INFO L125 PetriNetUnfolderBase]: For 3642/3642 co-relation queries the response was YES. [2023-11-17 16:04:39,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6360 conditions, 1730 events. 904/1730 cut-off events. For 3642/3642 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 8912 event pairs, 445 based on Foata normal form. 2/1732 useless extension candidates. Maximal degree in co-relation 6325. Up to 962 conditions per place. [2023-11-17 16:04:39,354 INFO L140 encePairwiseOnDemand]: 355/363 looper letters, 126 selfloop transitions, 12 changer transitions 14/152 dead transitions. [2023-11-17 16:04:39,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 152 transitions, 1171 flow [2023-11-17 16:04:39,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:04:39,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:04:39,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1578 transitions. [2023-11-17 16:04:39,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43471074380165287 [2023-11-17 16:04:39,356 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1578 transitions. [2023-11-17 16:04:39,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1578 transitions. [2023-11-17 16:04:39,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:39,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1578 transitions. [2023-11-17 16:04:39,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 157.8) internal successors, (1578), 10 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:39,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 363.0) internal successors, (3993), 11 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:39,360 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 363.0) internal successors, (3993), 11 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:39,360 INFO L175 Difference]: Start difference. First operand has 104 places, 65 transitions, 446 flow. Second operand 10 states and 1578 transitions. [2023-11-17 16:04:39,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 152 transitions, 1171 flow [2023-11-17 16:04:39,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 152 transitions, 1133 flow, removed 10 selfloop flow, removed 9 redundant places. [2023-11-17 16:04:39,368 INFO L231 Difference]: Finished difference. Result has 103 places, 67 transitions, 464 flow [2023-11-17 16:04:39,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=464, PETRI_PLACES=103, PETRI_TRANSITIONS=67} [2023-11-17 16:04:39,369 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2023-11-17 16:04:39,369 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 67 transitions, 464 flow [2023-11-17 16:04:39,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:39,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:39,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:39,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-17 16:04:39,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-17 16:04:39,574 INFO L420 AbstractCegarLoop]: === Iteration 22 === 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 16:04:39,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:39,574 INFO L85 PathProgramCache]: Analyzing trace with hash -74491299, now seen corresponding path program 21 times [2023-11-17 16:04:39,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:39,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943717063] [2023-11-17 16:04:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:39,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:40,317 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 16:04:40,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:40,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943717063] [2023-11-17 16:04:40,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943717063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:40,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953111732] [2023-11-17 16:04:40,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:04:40,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:40,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:40,319 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:40,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 16:04:40,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 16:04:40,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:40,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 16:04:40,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:40,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:40,524 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:40,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:04:40,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953111732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:40,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:04:40,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 17 [2023-11-17 16:04:40,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140344019] [2023-11-17 16:04:40,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:40,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:40,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:40,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:40,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:04:40,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 363 [2023-11-17 16:04:40,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 67 transitions, 464 flow. Second operand has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:40,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:40,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 363 [2023-11-17 16:04:40,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:40,924 INFO L124 PetriNetUnfolderBase]: 870/1696 cut-off events. [2023-11-17 16:04:40,925 INFO L125 PetriNetUnfolderBase]: For 3536/3536 co-relation queries the response was YES. [2023-11-17 16:04:40,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6359 conditions, 1696 events. 870/1696 cut-off events. For 3536/3536 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 8847 event pairs, 484 based on Foata normal form. 2/1698 useless extension candidates. Maximal degree in co-relation 6326. Up to 690 conditions per place. [2023-11-17 16:04:40,934 INFO L140 encePairwiseOnDemand]: 356/363 looper letters, 105 selfloop transitions, 6 changer transitions 28/139 dead transitions. [2023-11-17 16:04:40,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 139 transitions, 1093 flow [2023-11-17 16:04:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:04:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:04:40,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1419 transitions. [2023-11-17 16:04:40,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2023-11-17 16:04:40,936 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1419 transitions. [2023-11-17 16:04:40,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1419 transitions. [2023-11-17 16:04:40,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:40,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1419 transitions. [2023-11-17 16:04:40,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 157.66666666666666) internal successors, (1419), 9 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:40,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:40,939 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:40,939 INFO L175 Difference]: Start difference. First operand has 103 places, 67 transitions, 464 flow. Second operand 9 states and 1419 transitions. [2023-11-17 16:04:40,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 139 transitions, 1093 flow [2023-11-17 16:04:40,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 139 transitions, 1061 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-11-17 16:04:40,949 INFO L231 Difference]: Finished difference. Result has 106 places, 65 transitions, 444 flow [2023-11-17 16:04:40,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=444, PETRI_PLACES=106, PETRI_TRANSITIONS=65} [2023-11-17 16:04:40,949 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2023-11-17 16:04:40,949 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 65 transitions, 444 flow [2023-11-17 16:04:40,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:40,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:40,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:40,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:41,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-17 16:04:41,153 INFO L420 AbstractCegarLoop]: === Iteration 23 === 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 16:04:41,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:41,153 INFO L85 PathProgramCache]: Analyzing trace with hash 17454491, now seen corresponding path program 22 times [2023-11-17 16:04:41,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:41,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756574419] [2023-11-17 16:04:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:41,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:42,350 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 16:04:42,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:42,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756574419] [2023-11-17 16:04:42,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756574419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:42,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258701230] [2023-11-17 16:04:42,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:04:42,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:42,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:42,352 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:42,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 16:04:42,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:04:42,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:42,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:04:42,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:42,538 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:42,538 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:42,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:04:42,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258701230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:42,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:04:42,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2023-11-17 16:04:42,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922569722] [2023-11-17 16:04:42,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:42,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:42,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:42,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:42,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:04:42,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 363 [2023-11-17 16:04:42,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 65 transitions, 444 flow. Second operand has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:42,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:42,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 363 [2023-11-17 16:04:42,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:42,811 INFO L124 PetriNetUnfolderBase]: 819/1575 cut-off events. [2023-11-17 16:04:42,811 INFO L125 PetriNetUnfolderBase]: For 3643/3643 co-relation queries the response was YES. [2023-11-17 16:04:42,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5940 conditions, 1575 events. 819/1575 cut-off events. For 3643/3643 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8011 event pairs, 455 based on Foata normal form. 2/1577 useless extension candidates. Maximal degree in co-relation 5906. Up to 843 conditions per place. [2023-11-17 16:04:42,818 INFO L140 encePairwiseOnDemand]: 355/363 looper letters, 99 selfloop transitions, 10 changer transitions 27/136 dead transitions. [2023-11-17 16:04:42,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 136 transitions, 1064 flow [2023-11-17 16:04:42,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:04:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:04:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1272 transitions. [2023-11-17 16:04:42,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380165289256198 [2023-11-17 16:04:42,819 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1272 transitions. [2023-11-17 16:04:42,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1272 transitions. [2023-11-17 16:04:42,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:42,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1272 transitions. [2023-11-17 16:04:42,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:42,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 363.0) internal successors, (3267), 9 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:42,822 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 363.0) internal successors, (3267), 9 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:42,822 INFO L175 Difference]: Start difference. First operand has 106 places, 65 transitions, 444 flow. Second operand 8 states and 1272 transitions. [2023-11-17 16:04:42,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 136 transitions, 1064 flow [2023-11-17 16:04:42,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 136 transitions, 1039 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-11-17 16:04:42,829 INFO L231 Difference]: Finished difference. Result has 102 places, 64 transitions, 436 flow [2023-11-17 16:04:42,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=436, PETRI_PLACES=102, PETRI_TRANSITIONS=64} [2023-11-17 16:04:42,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2023-11-17 16:04:42,829 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 64 transitions, 436 flow [2023-11-17 16:04:42,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.57142857142858) internal successors, (1054), 7 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:42,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:42,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:42,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:43,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:43,034 INFO L420 AbstractCegarLoop]: === Iteration 24 === 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 16:04:43,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:43,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1869474785, now seen corresponding path program 23 times [2023-11-17 16:04:43,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:43,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749128337] [2023-11-17 16:04:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:43,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:44,184 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 16:04:44,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:44,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749128337] [2023-11-17 16:04:44,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749128337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:44,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284472274] [2023-11-17 16:04:44,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:04:44,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:44,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:44,186 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:44,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 16:04:44,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:04:44,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:44,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 16:04:44,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:44,310 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 147 treesize of output 143 [2023-11-17 16:04:44,411 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 16:04:44,479 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:44,479 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:44,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:44,545 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_700 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_700) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* c_~j~0 4))) 4))) (select .cse0 (+ c_~f~0.offset (* c_~i~0 4)))))) is different from false [2023-11-17 16:04:44,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:44,575 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-11-17 16:04:44,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:44,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 52 [2023-11-17 16:04:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:44,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284472274] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:44,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:04:44,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 9] total 23 [2023-11-17 16:04:44,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233513822] [2023-11-17 16:04:44,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:44,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:04:44,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:44,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:04:44,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=494, Unknown=1, NotChecked=44, Total=600 [2023-11-17 16:04:44,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 363 [2023-11-17 16:04:44,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 64 transitions, 436 flow. Second operand has 10 states, 10 states have (on average 140.2) internal successors, (1402), 10 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:44,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:44,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 363 [2023-11-17 16:04:44,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:45,061 INFO L124 PetriNetUnfolderBase]: 799/1555 cut-off events. [2023-11-17 16:04:45,061 INFO L125 PetriNetUnfolderBase]: For 3412/3412 co-relation queries the response was YES. [2023-11-17 16:04:45,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5858 conditions, 1555 events. 799/1555 cut-off events. For 3412/3412 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7933 event pairs, 476 based on Foata normal form. 2/1557 useless extension candidates. Maximal degree in co-relation 5827. Up to 819 conditions per place. [2023-11-17 16:04:45,067 INFO L140 encePairwiseOnDemand]: 355/363 looper letters, 79 selfloop transitions, 9 changer transitions 29/117 dead transitions. [2023-11-17 16:04:45,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 117 transitions, 929 flow [2023-11-17 16:04:45,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:04:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:04:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1185 transitions. [2023-11-17 16:04:45,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080578512396694 [2023-11-17 16:04:45,068 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1185 transitions. [2023-11-17 16:04:45,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1185 transitions. [2023-11-17 16:04:45,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:45,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1185 transitions. [2023-11-17 16:04:45,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 148.125) internal successors, (1185), 8 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 363.0) internal successors, (3267), 9 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,071 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 363.0) internal successors, (3267), 9 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,071 INFO L175 Difference]: Start difference. First operand has 102 places, 64 transitions, 436 flow. Second operand 8 states and 1185 transitions. [2023-11-17 16:04:45,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 117 transitions, 929 flow [2023-11-17 16:04:45,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 117 transitions, 900 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-11-17 16:04:45,077 INFO L231 Difference]: Finished difference. Result has 102 places, 63 transitions, 438 flow [2023-11-17 16:04:45,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=438, PETRI_PLACES=102, PETRI_TRANSITIONS=63} [2023-11-17 16:04:45,078 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2023-11-17 16:04:45,078 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 63 transitions, 438 flow [2023-11-17 16:04:45,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 140.2) internal successors, (1402), 10 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:45,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:45,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:45,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:45,283 INFO L420 AbstractCegarLoop]: === Iteration 25 === 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 16:04:45,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:45,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1714214195, now seen corresponding path program 24 times [2023-11-17 16:04:45,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:45,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929993954] [2023-11-17 16:04:45,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:45,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:46,420 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 16:04:46,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:46,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929993954] [2023-11-17 16:04:46,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929993954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:46,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406021216] [2023-11-17 16:04:46,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:04:46,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:46,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:46,421 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:46,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 16:04:46,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-17 16:04:46,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:46,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:04:46,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:46,549 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 436 treesize of output 420 [2023-11-17 16:04:46,630 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 16:04:46,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:46,736 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:46,743 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:04:46,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406021216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:46,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:04:46,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2023-11-17 16:04:46,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732978988] [2023-11-17 16:04:46,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:46,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:04:46,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:46,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:04:46,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:04:46,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 363 [2023-11-17 16:04:46,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 63 transitions, 438 flow. Second operand has 10 states, 10 states have (on average 140.2) internal successors, (1402), 10 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:46,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:46,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 363 [2023-11-17 16:04:46,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:47,180 INFO L124 PetriNetUnfolderBase]: 751/1453 cut-off events. [2023-11-17 16:04:47,181 INFO L125 PetriNetUnfolderBase]: For 3186/3186 co-relation queries the response was YES. [2023-11-17 16:04:47,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5509 conditions, 1453 events. 751/1453 cut-off events. For 3186/3186 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7218 event pairs, 476 based on Foata normal form. 2/1455 useless extension candidates. Maximal degree in co-relation 5477. Up to 716 conditions per place. [2023-11-17 16:04:47,186 INFO L140 encePairwiseOnDemand]: 355/363 looper letters, 68 selfloop transitions, 7 changer transitions 32/107 dead transitions. [2023-11-17 16:04:47,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 107 transitions, 860 flow [2023-11-17 16:04:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:04:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:04:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1313 transitions. [2023-11-17 16:04:47,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40189776553412915 [2023-11-17 16:04:47,188 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1313 transitions. [2023-11-17 16:04:47,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1313 transitions. [2023-11-17 16:04:47,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:47,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1313 transitions. [2023-11-17 16:04:47,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.88888888888889) internal successors, (1313), 9 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:47,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:47,192 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:47,192 INFO L175 Difference]: Start difference. First operand has 102 places, 63 transitions, 438 flow. Second operand 9 states and 1313 transitions. [2023-11-17 16:04:47,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 107 transitions, 860 flow [2023-11-17 16:04:47,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 107 transitions, 828 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-17 16:04:47,198 INFO L231 Difference]: Finished difference. Result has 102 places, 61 transitions, 411 flow [2023-11-17 16:04:47,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=411, PETRI_PLACES=102, PETRI_TRANSITIONS=61} [2023-11-17 16:04:47,199 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2023-11-17 16:04:47,199 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 61 transitions, 411 flow [2023-11-17 16:04:47,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 140.2) internal successors, (1402), 10 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:47,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:47,199 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:47,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:47,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-17 16:04:47,404 INFO L420 AbstractCegarLoop]: === Iteration 26 === 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 16:04:47,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:47,405 INFO L85 PathProgramCache]: Analyzing trace with hash -191481749, now seen corresponding path program 25 times [2023-11-17 16:04:47,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:47,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099191805] [2023-11-17 16:04:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:47,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:48,575 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 16:04:48,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:48,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099191805] [2023-11-17 16:04:48,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099191805] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:48,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651720083] [2023-11-17 16:04:48,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:04:48,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:48,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:48,593 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:48,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 16:04:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:48,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 16:04:48,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:48,711 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 16:04:48,841 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 16:04:48,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:48,913 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:48,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:48,976 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_780 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_780) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ c_~f~0.offset (* c_~j~0 4)))))) (select .cse0 (+ c_~f~0.offset (* c_~i~0 4)))))) is different from false [2023-11-17 16:04:49,002 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:49,003 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-11-17 16:04:49,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:49,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 60 [2023-11-17 16:04:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:49,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651720083] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:49,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:04:49,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 9] total 23 [2023-11-17 16:04:49,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603232101] [2023-11-17 16:04:49,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:49,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:04:49,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:49,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:04:49,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=487, Unknown=1, NotChecked=44, Total=600 [2023-11-17 16:04:49,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 363 [2023-11-17 16:04:49,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 61 transitions, 411 flow. Second operand has 10 states, 10 states have (on average 140.2) internal successors, (1402), 10 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:49,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:49,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 363 [2023-11-17 16:04:49,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:49,428 INFO L124 PetriNetUnfolderBase]: 684/1324 cut-off events. [2023-11-17 16:04:49,429 INFO L125 PetriNetUnfolderBase]: For 2549/2549 co-relation queries the response was YES. [2023-11-17 16:04:49,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4865 conditions, 1324 events. 684/1324 cut-off events. For 2549/2549 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6435 event pairs, 468 based on Foata normal form. 2/1326 useless extension candidates. Maximal degree in co-relation 4834. Up to 686 conditions per place. [2023-11-17 16:04:49,433 INFO L140 encePairwiseOnDemand]: 355/363 looper letters, 37 selfloop transitions, 3 changer transitions 52/92 dead transitions. [2023-11-17 16:04:49,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 92 transitions, 710 flow [2023-11-17 16:04:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:04:49,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:04:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1307 transitions. [2023-11-17 16:04:49,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4000612182430364 [2023-11-17 16:04:49,435 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1307 transitions. [2023-11-17 16:04:49,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1307 transitions. [2023-11-17 16:04:49,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:49,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1307 transitions. [2023-11-17 16:04:49,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.22222222222223) internal successors, (1307), 9 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:49,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:49,438 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:49,438 INFO L175 Difference]: Start difference. First operand has 102 places, 61 transitions, 411 flow. Second operand 9 states and 1307 transitions. [2023-11-17 16:04:49,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 92 transitions, 710 flow [2023-11-17 16:04:49,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 92 transitions, 683 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-11-17 16:04:49,444 INFO L231 Difference]: Finished difference. Result has 100 places, 40 transitions, 241 flow [2023-11-17 16:04:49,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=241, PETRI_PLACES=100, PETRI_TRANSITIONS=40} [2023-11-17 16:04:49,445 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2023-11-17 16:04:49,445 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 40 transitions, 241 flow [2023-11-17 16:04:49,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 140.2) internal successors, (1402), 10 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:49,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:49,445 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:49,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-17 16:04:49,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-17 16:04:49,650 INFO L420 AbstractCegarLoop]: === Iteration 27 === 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 16:04:49,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:49,650 INFO L85 PathProgramCache]: Analyzing trace with hash 760367953, now seen corresponding path program 26 times [2023-11-17 16:04:49,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:49,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847429863] [2023-11-17 16:04:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:49,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:50,884 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 16:04:50,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:50,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847429863] [2023-11-17 16:04:50,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847429863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:50,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274001174] [2023-11-17 16:04:50,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:04:50,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:50,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:50,887 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:50,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 16:04:51,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 16:04:51,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:51,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:04:51,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:51,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:04:51,164 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 16:04:51,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:04:51,195 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 27 treesize of output 15 [2023-11-17 16:04:51,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:51,298 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:51,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:04:51,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274001174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:51,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:04:51,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 20 [2023-11-17 16:04:51,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608040461] [2023-11-17 16:04:51,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:51,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:04:51,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:51,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:04:51,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:04:51,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 363 [2023-11-17 16:04:51,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 40 transitions, 241 flow. Second operand has 11 states, 11 states have (on average 136.9090909090909) internal successors, (1506), 11 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:51,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:51,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 363 [2023-11-17 16:04:51,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:51,587 INFO L124 PetriNetUnfolderBase]: 294/578 cut-off events. [2023-11-17 16:04:51,587 INFO L125 PetriNetUnfolderBase]: For 1234/1234 co-relation queries the response was YES. [2023-11-17 16:04:51,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2073 conditions, 578 events. 294/578 cut-off events. For 1234/1234 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2320 event pairs, 90 based on Foata normal form. 2/580 useless extension candidates. Maximal degree in co-relation 2044. Up to 200 conditions per place. [2023-11-17 16:04:51,589 INFO L140 encePairwiseOnDemand]: 355/363 looper letters, 50 selfloop transitions, 8 changer transitions 25/83 dead transitions. [2023-11-17 16:04:51,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 83 transitions, 604 flow [2023-11-17 16:04:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:04:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:04:51,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1409 transitions. [2023-11-17 16:04:51,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3881542699724518 [2023-11-17 16:04:51,591 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1409 transitions. [2023-11-17 16:04:51,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1409 transitions. [2023-11-17 16:04:51,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:51,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1409 transitions. [2023-11-17 16:04:51,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 140.9) internal successors, (1409), 10 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:51,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 363.0) internal successors, (3993), 11 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:51,594 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 363.0) internal successors, (3993), 11 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:51,594 INFO L175 Difference]: Start difference. First operand has 100 places, 40 transitions, 241 flow. Second operand 10 states and 1409 transitions. [2023-11-17 16:04:51,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 83 transitions, 604 flow [2023-11-17 16:04:51,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 484 flow, removed 18 selfloop flow, removed 27 redundant places. [2023-11-17 16:04:51,597 INFO L231 Difference]: Finished difference. Result has 67 places, 42 transitions, 194 flow [2023-11-17 16:04:51,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=194, PETRI_PLACES=67, PETRI_TRANSITIONS=42} [2023-11-17 16:04:51,597 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2023-11-17 16:04:51,597 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 42 transitions, 194 flow [2023-11-17 16:04:51,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 136.9090909090909) internal successors, (1506), 11 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:51,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:51,598 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:51,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:51,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 16:04:51,803 INFO L420 AbstractCegarLoop]: === Iteration 28 === 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 16:04:51,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:51,803 INFO L85 PathProgramCache]: Analyzing trace with hash 230474373, now seen corresponding path program 27 times [2023-11-17 16:04:51,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:51,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349432219] [2023-11-17 16:04:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:51,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:53,185 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 16:04:53,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:53,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349432219] [2023-11-17 16:04:53,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349432219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:53,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361339977] [2023-11-17 16:04:53,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:04:53,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:53,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:53,203 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:53,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 16:04:53,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 16:04:53,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:53,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 16:04:53,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:53,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:04:53,323 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 26 treesize of output 24 [2023-11-17 16:04:53,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:04:53,456 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 16:04:53,481 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 16:04:53,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:53,552 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:53,557 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:04:53,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361339977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:53,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:04:53,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 20 [2023-11-17 16:04:53,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198627703] [2023-11-17 16:04:53,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:53,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:04:53,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:53,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:04:53,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:04:53,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 363 [2023-11-17 16:04:53,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 42 transitions, 194 flow. Second operand has 11 states, 11 states have (on average 136.9090909090909) internal successors, (1506), 11 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:53,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:53,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 363 [2023-11-17 16:04:53,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:53,848 INFO L124 PetriNetUnfolderBase]: 280/556 cut-off events. [2023-11-17 16:04:53,848 INFO L125 PetriNetUnfolderBase]: For 968/968 co-relation queries the response was YES. [2023-11-17 16:04:53,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1894 conditions, 556 events. 280/556 cut-off events. For 968/968 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2229 event pairs, 80 based on Foata normal form. 2/558 useless extension candidates. Maximal degree in co-relation 1878. Up to 178 conditions per place. [2023-11-17 16:04:53,850 INFO L140 encePairwiseOnDemand]: 355/363 looper letters, 51 selfloop transitions, 7 changer transitions 26/84 dead transitions. [2023-11-17 16:04:53,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 84 transitions, 517 flow [2023-11-17 16:04:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:04:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:04:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1410 transitions. [2023-11-17 16:04:53,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884297520661157 [2023-11-17 16:04:53,853 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1410 transitions. [2023-11-17 16:04:53,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1410 transitions. [2023-11-17 16:04:53,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:53,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1410 transitions. [2023-11-17 16:04:53,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.0) internal successors, (1410), 10 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:53,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 363.0) internal successors, (3993), 11 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:53,856 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 363.0) internal successors, (3993), 11 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:53,856 INFO L175 Difference]: Start difference. First operand has 67 places, 42 transitions, 194 flow. Second operand 10 states and 1410 transitions. [2023-11-17 16:04:53,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 84 transitions, 517 flow [2023-11-17 16:04:53,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 492 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-11-17 16:04:53,859 INFO L231 Difference]: Finished difference. Result has 69 places, 40 transitions, 175 flow [2023-11-17 16:04:53,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=175, PETRI_PLACES=69, PETRI_TRANSITIONS=40} [2023-11-17 16:04:53,863 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2023-11-17 16:04:53,864 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 40 transitions, 175 flow [2023-11-17 16:04:53,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 136.9090909090909) internal successors, (1506), 11 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:53,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:53,864 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:53,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-17 16:04:54,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:54,069 INFO L420 AbstractCegarLoop]: === Iteration 29 === 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 16:04:54,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:54,069 INFO L85 PathProgramCache]: Analyzing trace with hash -945449423, now seen corresponding path program 28 times [2023-11-17 16:04:54,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:54,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878372531] [2023-11-17 16:04:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:54,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:55,096 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 16:04:55,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:55,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878372531] [2023-11-17 16:04:55,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878372531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:55,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283086532] [2023-11-17 16:04:55,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:04:55,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:55,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:55,098 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:55,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 16:04:55,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:04:55,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:55,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 16:04:55,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:55,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:04:55,371 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 16:04:55,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:04:55,400 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 16:04:55,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:55,474 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-17 16:04:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:55,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:55,573 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_898 (Array Int Int)) (v_ArrVal_899 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_898) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_899) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* c_~i~0 4))) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* c_~j~0 4))) 4)))))) is different from false [2023-11-17 16:04:55,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:55,600 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 314 treesize of output 282 [2023-11-17 16:04:55,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:55,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 66 [2023-11-17 16:04:55,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:04:55,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 65 [2023-11-17 16:04:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:55,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283086532] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:55,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:04:55,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12, 10] total 28 [2023-11-17 16:04:55,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788714157] [2023-11-17 16:04:55,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:55,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:04:55,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:55,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:04:55,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=722, Unknown=9, NotChecked=54, Total=870 [2023-11-17 16:04:55,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 363 [2023-11-17 16:04:55,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 40 transitions, 175 flow. Second operand has 11 states, 11 states have (on average 136.9090909090909) internal successors, (1506), 11 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:55,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:55,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 363 [2023-11-17 16:04:55,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:56,173 INFO L124 PetriNetUnfolderBase]: 165/349 cut-off events. [2023-11-17 16:04:56,173 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-11-17 16:04:56,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1105 conditions, 349 events. 165/349 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1164 event pairs, 80 based on Foata normal form. 2/351 useless extension candidates. Maximal degree in co-relation 1090. Up to 178 conditions per place. [2023-11-17 16:04:56,174 INFO L140 encePairwiseOnDemand]: 355/363 looper letters, 0 selfloop transitions, 0 changer transitions 57/57 dead transitions. [2023-11-17 16:04:56,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 57 transitions, 341 flow [2023-11-17 16:04:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:04:56,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:04:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1121 transitions. [2023-11-17 16:04:56,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3860192837465565 [2023-11-17 16:04:56,176 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1121 transitions. [2023-11-17 16:04:56,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1121 transitions. [2023-11-17 16:04:56,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:56,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1121 transitions. [2023-11-17 16:04:56,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 140.125) internal successors, (1121), 8 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:56,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 363.0) internal successors, (3267), 9 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:56,178 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 363.0) internal successors, (3267), 9 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:56,178 INFO L175 Difference]: Start difference. First operand has 69 places, 40 transitions, 175 flow. Second operand 8 states and 1121 transitions. [2023-11-17 16:04:56,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 57 transitions, 341 flow [2023-11-17 16:04:56,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 322 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-11-17 16:04:56,180 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-11-17 16:04:56,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-11-17 16:04:56,182 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2023-11-17 16:04:56,182 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-11-17 16:04:56,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 136.9090909090909) internal successors, (1506), 11 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:56,185 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-11-17 16:04:56,185 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-11-17 16:04:56,186 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-17 16:04:56,186 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-11-17 16:04:56,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:56,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 16:04:56,392 INFO L445 BasicCegarLoop]: Path program histogram: [28, 1] [2023-11-17 16:04:56,394 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:04:56,394 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:04:56,397 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:04:56 BasicIcfg [2023-11-17 16:04:56,397 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:04:56,397 INFO L158 Benchmark]: Toolchain (without parser) took 62319.98ms. Allocated memory was 240.1MB in the beginning and 1.4GB in the end (delta: 1.1GB). Free memory was 190.7MB in the beginning and 1.1GB in the end (delta: -884.4MB). Peak memory consumption was 241.0MB. Max. memory is 8.0GB. [2023-11-17 16:04:56,397 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 185.6MB. Free memory is still 133.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:04:56,398 INFO L158 Benchmark]: CACSL2BoogieTranslator took 303.72ms. Allocated memory is still 240.1MB. Free memory was 190.7MB in the beginning and 178.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-11-17 16:04:56,398 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.19ms. Allocated memory is still 240.1MB. Free memory was 178.1MB in the beginning and 176.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:04:56,398 INFO L158 Benchmark]: Boogie Preprocessor took 55.05ms. Allocated memory is still 240.1MB. Free memory was 176.0MB in the beginning and 174.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:04:56,398 INFO L158 Benchmark]: RCFGBuilder took 491.42ms. Allocated memory is still 240.1MB. Free memory was 174.0MB in the beginning and 145.1MB in the end (delta: 28.9MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. [2023-11-17 16:04:56,398 INFO L158 Benchmark]: TraceAbstraction took 61410.74ms. Allocated memory was 240.1MB in the beginning and 1.4GB in the end (delta: 1.1GB). Free memory was 144.6MB in the beginning and 1.1GB in the end (delta: -930.5MB). Peak memory consumption was 194.9MB. Max. memory is 8.0GB. [2023-11-17 16:04:56,399 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 185.6MB. Free memory is still 133.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 303.72ms. Allocated memory is still 240.1MB. Free memory was 190.7MB in the beginning and 178.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 53.19ms. Allocated memory is still 240.1MB. Free memory was 178.1MB in the beginning and 176.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 55.05ms. Allocated memory is still 240.1MB. Free memory was 176.0MB in the beginning and 174.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 491.42ms. Allocated memory is still 240.1MB. Free memory was 174.0MB in the beginning and 145.1MB in the end (delta: 28.9MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. * TraceAbstraction took 61410.74ms. Allocated memory was 240.1MB in the beginning and 1.4GB in the end (delta: 1.1GB). Free memory was 144.6MB in the beginning and 1.1GB in the end (delta: -930.5MB). Peak memory consumption was 194.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.4s, 183 PlacesBefore, 41 PlacesAfterwards, 180 TransitionsBefore, 32 TransitionsAfterwards, 1460 CoEnabledTransitionPairs, 8 FixpointIterations, 116 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 20 TrivialYvCompositions, 0 ConcurrentYvCompositions, 6 ChoiceCompositions, 169 TotalNumberOfCompositions, 6149 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3670, independent: 3391, independent conditional: 0, independent unconditional: 3391, dependent: 279, dependent conditional: 0, dependent unconditional: 279, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1145, independent: 1091, independent conditional: 0, independent unconditional: 1091, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1145, independent: 1082, independent conditional: 0, independent unconditional: 1082, dependent: 63, dependent conditional: 0, dependent unconditional: 63, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 63, independent: 9, independent conditional: 0, independent unconditional: 9, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 93, independent: 11, independent conditional: 0, independent unconditional: 11, dependent: 82, dependent conditional: 0, dependent unconditional: 82, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3670, independent: 2300, independent conditional: 0, independent unconditional: 2300, dependent: 225, dependent conditional: 0, dependent unconditional: 225, unknown: 1145, unknown conditional: 0, unknown unconditional: 1145] , Statistics on independence cache: Total cache size (in pairs): 264, Positive cache size: 239, Positive conditional cache size: 0, Positive unconditional cache size: 239, Negative cache size: 25, Negative conditional cache size: 0, Negative unconditional cache size: 25, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 161]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 226 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 61.3s, OverallIterations: 29, TraceHistogramMax: 2, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 20.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2357 SdHoareTripleChecker+Valid, 5.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2357 mSDsluCounter, 4 SdHoareTripleChecker+Invalid, 4.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 201 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 62 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10964 IncrementalHoareTripleChecker+Invalid, 11227 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 62 mSolverCounterUnsat, 2 mSDtfsCounter, 10964 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1262 GetRequests, 737 SyntacticMatches, 1 SemanticMatches, 524 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 8.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1031occurred in iteration=15, InterpolantAutomatonStates: 247, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 27.9s InterpolantComputationTime, 1606 NumberOfCodeBlocks, 1569 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 1780 ConstructedInterpolants, 92 QuantifiedInterpolants, 45429 SizeOfPredicates, 231 NumberOfNonLiveVariables, 4863 ConjunctsInSsa, 390 ConjunctsInUnsatCore, 56 InterpolantComputations, 28 PerfectInterpolantSequences, 75/145 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-17 16:04:56,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...