/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:13:24,268 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:13:24,350 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 16:13:24,388 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:13:24,388 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:13:24,389 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:13:24,390 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:13:24,390 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:13:24,390 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:13:24,394 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:13:24,394 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:13:24,395 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:13:24,395 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:13:24,396 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:13:24,396 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:13:24,397 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:13:24,397 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:13:24,397 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:13:24,397 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:13:24,397 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:13:24,398 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:13:24,398 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:13:24,399 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:13:24,399 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:13:24,399 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:13:24,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:13:24,401 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:13:24,401 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:13:24,401 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:13:24,401 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:13:24,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:13:24,402 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:13:24,403 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:13:24,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:13:24,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:13:24,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:13:24,663 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:13:24,663 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:13:24,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-11-17 16:13:25,885 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:13:26,028 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:13:26,029 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-11-17 16:13:26,036 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7604259b/cae61bd95be848cba9372b858717258c/FLAG97a09eb41 [2023-11-17 16:13:26,048 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7604259b/cae61bd95be848cba9372b858717258c [2023-11-17 16:13:26,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:13:26,051 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:13:26,052 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:13:26,052 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:13:26,056 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:13:26,057 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:13:26" (1/1) ... [2023-11-17 16:13:26,058 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f05194f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:26, skipping insertion in model container [2023-11-17 16:13:26,058 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:13:26" (1/1) ... [2023-11-17 16:13:26,081 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:13:26,212 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c[2559,2572] [2023-11-17 16:13:26,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:13:26,224 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:13:26,245 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c[2559,2572] [2023-11-17 16:13:26,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:13:26,254 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:13:26,254 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:13:26,260 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:13:26,261 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:26 WrapperNode [2023-11-17 16:13:26,261 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:13:26,262 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:13:26,262 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:13:26,262 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:13:26,268 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:26" (1/1) ... [2023-11-17 16:13:26,275 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:26" (1/1) ... [2023-11-17 16:13:26,314 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 125 [2023-11-17 16:13:26,314 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:13:26,315 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:13:26,315 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:13:26,315 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:13:26,322 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:26" (1/1) ... [2023-11-17 16:13:26,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:26" (1/1) ... [2023-11-17 16:13:26,335 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:26" (1/1) ... [2023-11-17 16:13:26,336 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:26" (1/1) ... [2023-11-17 16:13:26,340 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:26" (1/1) ... [2023-11-17 16:13:26,344 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:26" (1/1) ... [2023-11-17 16:13:26,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:26" (1/1) ... [2023-11-17 16:13:26,369 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:26" (1/1) ... [2023-11-17 16:13:26,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:13:26,372 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:13:26,372 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:13:26,372 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:13:26,373 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:26" (1/1) ... [2023-11-17 16:13:26,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:13:26,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:26,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 16:13:26,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 16:13:26,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:13:26,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:13:26,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:13:26,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:13:26,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:13:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:13:26,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:13:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 16:13:26,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 16:13:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:13:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:13:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:13:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:13:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:13:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:13:26,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:13:26,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:13:26,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:13:26,450 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 16:13:26,576 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:13:26,578 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:13:26,817 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:13:26,879 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:13:26,879 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 16:13:26,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:13:26 BoogieIcfgContainer [2023-11-17 16:13:26,881 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:13:26,883 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:13:26,883 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:13:26,886 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:13:26,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:13:26" (1/3) ... [2023-11-17 16:13:26,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130ea1ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:13:26, skipping insertion in model container [2023-11-17 16:13:26,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:26" (2/3) ... [2023-11-17 16:13:26,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130ea1ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:13:26, skipping insertion in model container [2023-11-17 16:13:26,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:13:26" (3/3) ... [2023-11-17 16:13:26,888 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-11-17 16:13:26,902 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:13:26,902 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:13:26,902 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:13:27,006 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 16:13:27,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 134 transitions, 296 flow [2023-11-17 16:13:27,117 INFO L124 PetriNetUnfolderBase]: 9/130 cut-off events. [2023-11-17 16:13:27,118 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:13:27,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 130 events. 9/130 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 113 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-11-17 16:13:27,131 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 134 transitions, 296 flow [2023-11-17 16:13:27,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 117 transitions, 258 flow [2023-11-17 16:13:27,145 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:13:27,165 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 117 transitions, 258 flow [2023-11-17 16:13:27,173 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 117 transitions, 258 flow [2023-11-17 16:13:27,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 117 transitions, 258 flow [2023-11-17 16:13:27,215 INFO L124 PetriNetUnfolderBase]: 9/117 cut-off events. [2023-11-17 16:13:27,215 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:13:27,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 117 events. 9/117 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 112 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-11-17 16:13:27,218 INFO L119 LiptonReduction]: Number of co-enabled transitions 3312 [2023-11-17 16:13:30,489 INFO L134 LiptonReduction]: Checked pairs total: 3148 [2023-11-17 16:13:30,489 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-11-17 16:13:30,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:13:30,508 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;@5a78d576, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:13:30,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 16:13:30,515 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:13:30,515 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-11-17 16:13:30,515 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:13:30,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:30,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:30,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:30,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:30,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1890062007, now seen corresponding path program 1 times [2023-11-17 16:13:30,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:30,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198023428] [2023-11-17 16:13:30,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:30,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:31,007 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 16:13:31,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:31,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198023428] [2023-11-17 16:13:31,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198023428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:31,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:31,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:13:31,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896879675] [2023-11-17 16:13:31,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:31,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:13:31,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:31,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:13:31,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:13:31,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 230 [2023-11-17 16:13:31,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:31,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:31,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 230 [2023-11-17 16:13:31,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:31,369 INFO L124 PetriNetUnfolderBase]: 1680/2288 cut-off events. [2023-11-17 16:13:31,369 INFO L125 PetriNetUnfolderBase]: For 218/218 co-relation queries the response was YES. [2023-11-17 16:13:31,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 2288 events. 1680/2288 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8135 event pairs, 624 based on Foata normal form. 1/1777 useless extension candidates. Maximal degree in co-relation 3668. Up to 1345 conditions per place. [2023-11-17 16:13:31,384 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 47 selfloop transitions, 3 changer transitions 3/53 dead transitions. [2023-11-17 16:13:31,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 257 flow [2023-11-17 16:13:31,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:13:31,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:13:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-11-17 16:13:31,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572463768115942 [2023-11-17 16:13:31,397 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-11-17 16:13:31,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-11-17 16:13:31,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:31,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-11-17 16:13:31,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:31,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:31,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:31,411 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 395 transitions. [2023-11-17 16:13:31,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 257 flow [2023-11-17 16:13:31,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 53 transitions, 227 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 16:13:31,419 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 89 flow [2023-11-17 16:13:31,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-17 16:13:31,423 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-11-17 16:13:31,424 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 89 flow [2023-11-17 16:13:31,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:31,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:31,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:31,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:13:31,425 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:31,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:31,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1981814270, now seen corresponding path program 1 times [2023-11-17 16:13:31,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:31,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402845102] [2023-11-17 16:13:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:31,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:31,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:31,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402845102] [2023-11-17 16:13:31,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402845102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:31,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:31,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:13:31,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735734169] [2023-11-17 16:13:31,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:31,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:13:31,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:31,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:13:31,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:13:31,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:31,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:31,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:31,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:31,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:31,872 INFO L124 PetriNetUnfolderBase]: 2237/3045 cut-off events. [2023-11-17 16:13:31,872 INFO L125 PetriNetUnfolderBase]: For 539/539 co-relation queries the response was YES. [2023-11-17 16:13:31,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7078 conditions, 3045 events. 2237/3045 cut-off events. For 539/539 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11592 event pairs, 710 based on Foata normal form. 48/3093 useless extension candidates. Maximal degree in co-relation 2227. Up to 1464 conditions per place. [2023-11-17 16:13:31,890 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 66 selfloop transitions, 4 changer transitions 17/87 dead transitions. [2023-11-17 16:13:31,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 87 transitions, 410 flow [2023-11-17 16:13:31,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:13:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:13:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-11-17 16:13:31,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5165217391304348 [2023-11-17 16:13:31,923 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-11-17 16:13:31,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-11-17 16:13:31,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:31,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-11-17 16:13:31,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:31,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:31,930 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:31,930 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 89 flow. Second operand 5 states and 594 transitions. [2023-11-17 16:13:31,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 87 transitions, 410 flow [2023-11-17 16:13:31,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 87 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:13:31,934 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 115 flow [2023-11-17 16:13:31,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-11-17 16:13:31,935 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-11-17 16:13:31,936 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 115 flow [2023-11-17 16:13:31,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:31,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:31,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:31,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:13:31,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:31,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:31,948 INFO L85 PathProgramCache]: Analyzing trace with hash -709280332, now seen corresponding path program 1 times [2023-11-17 16:13:31,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:31,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49503794] [2023-11-17 16:13:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:31,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:32,110 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 16:13:32,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:32,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49503794] [2023-11-17 16:13:32,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49503794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:32,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513558422] [2023-11-17 16:13:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:32,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:32,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:32,117 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 16:13:32,148 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 16:13:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:32,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:13:32,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:32,316 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 16:13:32,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:32,358 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 16:13:32,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513558422] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:32,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:32,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 16:13:32,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608068407] [2023-11-17 16:13:32,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:32,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:13:32,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:32,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:13:32,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:13:32,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:32,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 115 flow. Second operand has 8 states, 8 states have (on average 106.25) internal successors, (850), 8 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:32,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:32,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:32,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:32,859 INFO L124 PetriNetUnfolderBase]: 2322/3154 cut-off events. [2023-11-17 16:13:32,860 INFO L125 PetriNetUnfolderBase]: For 1516/1516 co-relation queries the response was YES. [2023-11-17 16:13:32,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8592 conditions, 3154 events. 2322/3154 cut-off events. For 1516/1516 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12112 event pairs, 715 based on Foata normal form. 72/3226 useless extension candidates. Maximal degree in co-relation 4148. Up to 1266 conditions per place. [2023-11-17 16:13:32,879 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 106 selfloop transitions, 10 changer transitions 0/116 dead transitions. [2023-11-17 16:13:32,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 116 transitions, 584 flow [2023-11-17 16:13:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:13:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:13:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 829 transitions. [2023-11-17 16:13:32,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149068322981366 [2023-11-17 16:13:32,883 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 829 transitions. [2023-11-17 16:13:32,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 829 transitions. [2023-11-17 16:13:32,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:32,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 829 transitions. [2023-11-17 16:13:32,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 118.42857142857143) internal successors, (829), 7 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:32,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:32,889 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:32,890 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 115 flow. Second operand 7 states and 829 transitions. [2023-11-17 16:13:32,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 116 transitions, 584 flow [2023-11-17 16:13:32,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 116 transitions, 565 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-17 16:13:32,904 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 170 flow [2023-11-17 16:13:32,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=170, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-11-17 16:13:32,905 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2023-11-17 16:13:32,905 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 170 flow [2023-11-17 16:13:32,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 106.25) internal successors, (850), 8 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:32,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:32,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:32,920 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 16:13:33,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:33,114 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:33,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:33,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2039706688, now seen corresponding path program 2 times [2023-11-17 16:13:33,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:33,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408429077] [2023-11-17 16:13:33,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:33,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:33,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:33,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408429077] [2023-11-17 16:13:33,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408429077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:33,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:33,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:13:33,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397048918] [2023-11-17 16:13:33,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:33,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:13:33,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:33,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:13:33,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:13:33,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:33,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:33,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:33,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:33,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:33,653 INFO L124 PetriNetUnfolderBase]: 2827/3835 cut-off events. [2023-11-17 16:13:33,653 INFO L125 PetriNetUnfolderBase]: For 6063/6063 co-relation queries the response was YES. [2023-11-17 16:13:33,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11955 conditions, 3835 events. 2827/3835 cut-off events. For 6063/6063 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14889 event pairs, 994 based on Foata normal form. 24/3859 useless extension candidates. Maximal degree in co-relation 5418. Up to 2266 conditions per place. [2023-11-17 16:13:33,677 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 70 selfloop transitions, 8 changer transitions 10/88 dead transitions. [2023-11-17 16:13:33,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 88 transitions, 531 flow [2023-11-17 16:13:33,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:13:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:13:33,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2023-11-17 16:13:33,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5095652173913043 [2023-11-17 16:13:33,679 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2023-11-17 16:13:33,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2023-11-17 16:13:33,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:33,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2023-11-17 16:13:33,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:33,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:33,684 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:33,684 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 170 flow. Second operand 5 states and 586 transitions. [2023-11-17 16:13:33,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 88 transitions, 531 flow [2023-11-17 16:13:33,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 88 transitions, 505 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 16:13:33,703 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 205 flow [2023-11-17 16:13:33,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-11-17 16:13:33,705 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-11-17 16:13:33,705 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 205 flow [2023-11-17 16:13:33,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:33,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:33,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:33,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:13:33,706 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:33,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:33,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2127327480, now seen corresponding path program 2 times [2023-11-17 16:13:33,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:33,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340479891] [2023-11-17 16:13:33,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:33,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:33,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:33,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340479891] [2023-11-17 16:13:33,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340479891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:33,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:33,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:13:33,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424532278] [2023-11-17 16:13:33,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:33,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:13:33,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:33,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:13:33,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:13:33,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:33,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:33,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:33,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:33,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:34,244 INFO L124 PetriNetUnfolderBase]: 3037/4093 cut-off events. [2023-11-17 16:13:34,245 INFO L125 PetriNetUnfolderBase]: For 9232/9232 co-relation queries the response was YES. [2023-11-17 16:13:34,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14172 conditions, 4093 events. 3037/4093 cut-off events. For 9232/9232 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15580 event pairs, 1575 based on Foata normal form. 48/4141 useless extension candidates. Maximal degree in co-relation 6104. Up to 3362 conditions per place. [2023-11-17 16:13:34,280 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 71 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2023-11-17 16:13:34,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 541 flow [2023-11-17 16:13:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:13:34,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:13:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 581 transitions. [2023-11-17 16:13:34,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052173913043478 [2023-11-17 16:13:34,283 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 581 transitions. [2023-11-17 16:13:34,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 581 transitions. [2023-11-17 16:13:34,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:34,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 581 transitions. [2023-11-17 16:13:34,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:34,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:34,287 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:34,287 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 205 flow. Second operand 5 states and 581 transitions. [2023-11-17 16:13:34,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 541 flow [2023-11-17 16:13:34,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 81 transitions, 491 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-11-17 16:13:34,314 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 261 flow [2023-11-17 16:13:34,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-11-17 16:13:34,316 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2023-11-17 16:13:34,316 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 261 flow [2023-11-17 16:13:34,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:34,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:34,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:34,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 16:13:34,317 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:34,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:34,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1712299186, now seen corresponding path program 3 times [2023-11-17 16:13:34,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:34,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824067628] [2023-11-17 16:13:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:34,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:34,421 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 16:13:34,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:34,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824067628] [2023-11-17 16:13:34,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824067628] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:34,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855596018] [2023-11-17 16:13:34,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:13:34,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:34,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:34,424 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 16:13:34,436 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 16:13:34,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:13:34,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:34,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:13:34,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:34,585 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 16:13:34,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:34,612 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 16:13:34,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855596018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:34,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:34,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 16:13:34,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213620462] [2023-11-17 16:13:34,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:34,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:13:34,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:34,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:13:34,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:13:34,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:34,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 261 flow. Second operand has 10 states, 10 states have (on average 105.7) internal successors, (1057), 10 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:34,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:34,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:34,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:35,126 INFO L124 PetriNetUnfolderBase]: 3265/4393 cut-off events. [2023-11-17 16:13:35,126 INFO L125 PetriNetUnfolderBase]: For 9776/9776 co-relation queries the response was YES. [2023-11-17 16:13:35,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14869 conditions, 4393 events. 3265/4393 cut-off events. For 9776/9776 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16927 event pairs, 1335 based on Foata normal form. 72/4465 useless extension candidates. Maximal degree in co-relation 10554. Up to 3246 conditions per place. [2023-11-17 16:13:35,152 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 80 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2023-11-17 16:13:35,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 99 transitions, 652 flow [2023-11-17 16:13:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:13:35,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:13:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 698 transitions. [2023-11-17 16:13:35,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057971014492754 [2023-11-17 16:13:35,155 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 698 transitions. [2023-11-17 16:13:35,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 698 transitions. [2023-11-17 16:13:35,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:35,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 698 transitions. [2023-11-17 16:13:35,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 116.33333333333333) internal successors, (698), 6 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:35,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 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 16:13:35,159 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 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 16:13:35,159 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 261 flow. Second operand 6 states and 698 transitions. [2023-11-17 16:13:35,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 99 transitions, 652 flow [2023-11-17 16:13:35,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 99 transitions, 622 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-17 16:13:35,188 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 367 flow [2023-11-17 16:13:35,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=367, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-11-17 16:13:35,191 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2023-11-17 16:13:35,191 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 367 flow [2023-11-17 16:13:35,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 105.7) internal successors, (1057), 10 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:35,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:35,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:35,201 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 16:13:35,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 16:13:35,399 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:35,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:35,399 INFO L85 PathProgramCache]: Analyzing trace with hash 495381092, now seen corresponding path program 3 times [2023-11-17 16:13:35,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:35,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120234001] [2023-11-17 16:13:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:35,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:35,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:35,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120234001] [2023-11-17 16:13:35,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120234001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:35,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:35,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:13:35,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593339112] [2023-11-17 16:13:35,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:35,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:13:35,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:35,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:13:35,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:13:35,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:35,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 367 flow. Second operand has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:35,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:35,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:35,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:35,976 INFO L124 PetriNetUnfolderBase]: 3427/4603 cut-off events. [2023-11-17 16:13:35,977 INFO L125 PetriNetUnfolderBase]: For 9961/9961 co-relation queries the response was YES. [2023-11-17 16:13:35,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16654 conditions, 4603 events. 3427/4603 cut-off events. For 9961/9961 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18156 event pairs, 579 based on Foata normal form. 48/4651 useless extension candidates. Maximal degree in co-relation 12507. Up to 1984 conditions per place. [2023-11-17 16:13:36,007 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 84 selfloop transitions, 17 changer transitions 1/102 dead transitions. [2023-11-17 16:13:36,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 102 transitions, 739 flow [2023-11-17 16:13:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:13:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:13:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 590 transitions. [2023-11-17 16:13:36,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130434782608696 [2023-11-17 16:13:36,010 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 590 transitions. [2023-11-17 16:13:36,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 590 transitions. [2023-11-17 16:13:36,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:36,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 590 transitions. [2023-11-17 16:13:36,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:36,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:36,014 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:36,014 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 367 flow. Second operand 5 states and 590 transitions. [2023-11-17 16:13:36,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 102 transitions, 739 flow [2023-11-17 16:13:36,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 102 transitions, 691 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-17 16:13:36,092 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 387 flow [2023-11-17 16:13:36,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=387, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2023-11-17 16:13:36,094 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2023-11-17 16:13:36,094 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 387 flow [2023-11-17 16:13:36,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:36,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:36,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:36,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 16:13:36,097 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:36,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:36,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1522089206, now seen corresponding path program 4 times [2023-11-17 16:13:36,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:36,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27073664] [2023-11-17 16:13:36,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:36,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:36,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:36,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27073664] [2023-11-17 16:13:36,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27073664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:36,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:36,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:13:36,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258062706] [2023-11-17 16:13:36,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:36,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:13:36,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:36,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:13:36,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:13:36,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:36,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:36,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:36,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:36,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:36,623 INFO L124 PetriNetUnfolderBase]: 3470/4670 cut-off events. [2023-11-17 16:13:36,624 INFO L125 PetriNetUnfolderBase]: For 13565/13565 co-relation queries the response was YES. [2023-11-17 16:13:36,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17025 conditions, 4670 events. 3470/4670 cut-off events. For 13565/13565 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18288 event pairs, 1593 based on Foata normal form. 24/4694 useless extension candidates. Maximal degree in co-relation 14499. Up to 3734 conditions per place. [2023-11-17 16:13:36,653 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 63 selfloop transitions, 14 changer transitions 9/86 dead transitions. [2023-11-17 16:13:36,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 86 transitions, 643 flow [2023-11-17 16:13:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:13:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:13:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 577 transitions. [2023-11-17 16:13:36,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017391304347826 [2023-11-17 16:13:36,655 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 577 transitions. [2023-11-17 16:13:36,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 577 transitions. [2023-11-17 16:13:36,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:36,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 577 transitions. [2023-11-17 16:13:36,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.4) internal successors, (577), 5 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:36,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:36,659 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:36,659 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 387 flow. Second operand 5 states and 577 transitions. [2023-11-17 16:13:36,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 86 transitions, 643 flow [2023-11-17 16:13:36,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 86 transitions, 617 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 16:13:36,706 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 378 flow [2023-11-17 16:13:36,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=378, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2023-11-17 16:13:36,708 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 28 predicate places. [2023-11-17 16:13:36,708 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 378 flow [2023-11-17 16:13:36,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:36,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:36,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:36,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 16:13:36,711 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:36,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:36,711 INFO L85 PathProgramCache]: Analyzing trace with hash 391295098, now seen corresponding path program 5 times [2023-11-17 16:13:36,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:36,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273649914] [2023-11-17 16:13:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:36,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:36,806 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 16:13:36,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:36,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273649914] [2023-11-17 16:13:36,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273649914] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:36,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769762348] [2023-11-17 16:13:36,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:13:36,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:36,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:36,808 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 16:13:36,832 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 16:13:36,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:13:36,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:36,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:13:36,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:36,946 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 16:13:36,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:36,979 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 16:13:36,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769762348] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:36,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:36,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 16:13:36,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115163115] [2023-11-17 16:13:36,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:36,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:13:36,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:36,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:13:36,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:13:36,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:36,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 378 flow. Second operand has 10 states, 10 states have (on average 105.9) internal successors, (1059), 10 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:36,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:36,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:36,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:37,654 INFO L124 PetriNetUnfolderBase]: 3559/4807 cut-off events. [2023-11-17 16:13:37,654 INFO L125 PetriNetUnfolderBase]: For 10605/10605 co-relation queries the response was YES. [2023-11-17 16:13:37,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17296 conditions, 4807 events. 3559/4807 cut-off events. For 10605/10605 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19220 event pairs, 1137 based on Foata normal form. 72/4879 useless extension candidates. Maximal degree in co-relation 14786. Up to 2558 conditions per place. [2023-11-17 16:13:37,684 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 126 selfloop transitions, 26 changer transitions 1/153 dead transitions. [2023-11-17 16:13:37,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 153 transitions, 989 flow [2023-11-17 16:13:37,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:13:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:13:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1159 transitions. [2023-11-17 16:13:37,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5039130434782608 [2023-11-17 16:13:37,688 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1159 transitions. [2023-11-17 16:13:37,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1159 transitions. [2023-11-17 16:13:37,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:37,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1159 transitions. [2023-11-17 16:13:37,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 115.9) internal successors, (1159), 10 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:37,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 230.0) internal successors, (2530), 11 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:37,695 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 230.0) internal successors, (2530), 11 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:37,695 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 378 flow. Second operand 10 states and 1159 transitions. [2023-11-17 16:13:37,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 153 transitions, 989 flow [2023-11-17 16:13:37,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 153 transitions, 961 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 16:13:37,748 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 456 flow [2023-11-17 16:13:37,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=456, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2023-11-17 16:13:37,749 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2023-11-17 16:13:37,749 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 456 flow [2023-11-17 16:13:37,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 105.9) internal successors, (1059), 10 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:37,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:37,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:37,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 16:13:37,956 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 16:13:37,957 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:37,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2002584814, now seen corresponding path program 4 times [2023-11-17 16:13:37,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:37,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238637922] [2023-11-17 16:13:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:37,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:38,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:38,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238637922] [2023-11-17 16:13:38,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238637922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:38,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:38,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:13:38,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187450502] [2023-11-17 16:13:38,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:38,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:13:38,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:38,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:13:38,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:13:38,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:38,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 456 flow. Second operand has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:38,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:38,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:38,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:38,496 INFO L124 PetriNetUnfolderBase]: 3515/4787 cut-off events. [2023-11-17 16:13:38,496 INFO L125 PetriNetUnfolderBase]: For 12301/12301 co-relation queries the response was YES. [2023-11-17 16:13:38,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17586 conditions, 4787 events. 3515/4787 cut-off events. For 12301/12301 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 19406 event pairs, 1568 based on Foata normal form. 48/4835 useless extension candidates. Maximal degree in co-relation 16328. Up to 3799 conditions per place. [2023-11-17 16:13:38,525 INFO L140 encePairwiseOnDemand]: 225/230 looper letters, 68 selfloop transitions, 13 changer transitions 12/93 dead transitions. [2023-11-17 16:13:38,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 725 flow [2023-11-17 16:13:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:13:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:13:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 579 transitions. [2023-11-17 16:13:38,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034782608695653 [2023-11-17 16:13:38,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 579 transitions. [2023-11-17 16:13:38,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 579 transitions. [2023-11-17 16:13:38,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:38,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 579 transitions. [2023-11-17 16:13:38,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.8) internal successors, (579), 5 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:38,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:38,531 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:38,531 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 456 flow. Second operand 5 states and 579 transitions. [2023-11-17 16:13:38,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 725 flow [2023-11-17 16:13:38,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 93 transitions, 652 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-11-17 16:13:38,577 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 404 flow [2023-11-17 16:13:38,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=404, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2023-11-17 16:13:38,578 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-11-17 16:13:38,578 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 404 flow [2023-11-17 16:13:38,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:38,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:38,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:38,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 16:13:38,579 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:38,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:38,580 INFO L85 PathProgramCache]: Analyzing trace with hash -814548314, now seen corresponding path program 6 times [2023-11-17 16:13:38,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:38,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588479792] [2023-11-17 16:13:38,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:38,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:38,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:38,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588479792] [2023-11-17 16:13:38,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588479792] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:38,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:38,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:13:38,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621249998] [2023-11-17 16:13:38,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:38,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:13:38,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:38,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:13:38,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:13:38,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:38,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 404 flow. Second operand has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:38,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:38,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:38,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:39,112 INFO L124 PetriNetUnfolderBase]: 3258/4402 cut-off events. [2023-11-17 16:13:39,112 INFO L125 PetriNetUnfolderBase]: For 9982/9982 co-relation queries the response was YES. [2023-11-17 16:13:39,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15664 conditions, 4402 events. 3258/4402 cut-off events. For 9982/9982 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17174 event pairs, 1217 based on Foata normal form. 24/4426 useless extension candidates. Maximal degree in co-relation 14576. Up to 2984 conditions per place. [2023-11-17 16:13:39,141 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 61 selfloop transitions, 18 changer transitions 9/88 dead transitions. [2023-11-17 16:13:39,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 664 flow [2023-11-17 16:13:39,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:13:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:13:39,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 576 transitions. [2023-11-17 16:13:39,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5008695652173913 [2023-11-17 16:13:39,143 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 576 transitions. [2023-11-17 16:13:39,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 576 transitions. [2023-11-17 16:13:39,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:39,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 576 transitions. [2023-11-17 16:13:39,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:39,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:39,147 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:39,147 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 404 flow. Second operand 5 states and 576 transitions. [2023-11-17 16:13:39,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 664 flow [2023-11-17 16:13:39,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 634 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-17 16:13:39,194 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 410 flow [2023-11-17 16:13:39,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=410, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2023-11-17 16:13:39,194 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-11-17 16:13:39,195 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 410 flow [2023-11-17 16:13:39,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:39,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:39,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:39,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 16:13:39,195 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:39,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:39,196 INFO L85 PathProgramCache]: Analyzing trace with hash 443318676, now seen corresponding path program 5 times [2023-11-17 16:13:39,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:39,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414108731] [2023-11-17 16:13:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:39,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:39,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:39,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414108731] [2023-11-17 16:13:39,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414108731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:39,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:39,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:13:39,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98679229] [2023-11-17 16:13:39,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:39,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:13:39,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:39,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:13:39,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:13:39,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:39,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 410 flow. Second operand has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:39,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:39,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:39,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:39,675 INFO L124 PetriNetUnfolderBase]: 3092/4157 cut-off events. [2023-11-17 16:13:39,676 INFO L125 PetriNetUnfolderBase]: For 9469/9469 co-relation queries the response was YES. [2023-11-17 16:13:39,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14824 conditions, 4157 events. 3092/4157 cut-off events. For 9469/9469 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15898 event pairs, 1032 based on Foata normal form. 48/4205 useless extension candidates. Maximal degree in co-relation 13640. Up to 2620 conditions per place. [2023-11-17 16:13:39,696 INFO L140 encePairwiseOnDemand]: 225/230 looper letters, 70 selfloop transitions, 19 changer transitions 1/90 dead transitions. [2023-11-17 16:13:39,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 90 transitions, 679 flow [2023-11-17 16:13:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:13:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:13:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 579 transitions. [2023-11-17 16:13:39,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034782608695653 [2023-11-17 16:13:39,699 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 579 transitions. [2023-11-17 16:13:39,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 579 transitions. [2023-11-17 16:13:39,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:39,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 579 transitions. [2023-11-17 16:13:39,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.8) internal successors, (579), 5 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:39,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:39,702 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:39,703 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 410 flow. Second operand 5 states and 579 transitions. [2023-11-17 16:13:39,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 90 transitions, 679 flow [2023-11-17 16:13:39,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 90 transitions, 637 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-17 16:13:39,739 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 395 flow [2023-11-17 16:13:39,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=395, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2023-11-17 16:13:39,740 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2023-11-17 16:13:39,740 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 395 flow [2023-11-17 16:13:39,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:39,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:39,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:39,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 16:13:39,742 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:39,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:39,742 INFO L85 PathProgramCache]: Analyzing trace with hash 726234136, now seen corresponding path program 6 times [2023-11-17 16:13:39,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:39,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540019895] [2023-11-17 16:13:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:39,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:39,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:39,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540019895] [2023-11-17 16:13:39,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540019895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:39,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:39,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:13:39,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127257010] [2023-11-17 16:13:39,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:39,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:13:39,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:39,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:13:39,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:13:39,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:39,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 395 flow. Second operand has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:39,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:39,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:39,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:40,142 INFO L124 PetriNetUnfolderBase]: 2709/3614 cut-off events. [2023-11-17 16:13:40,142 INFO L125 PetriNetUnfolderBase]: For 8356/8356 co-relation queries the response was YES. [2023-11-17 16:13:40,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13104 conditions, 3614 events. 2709/3614 cut-off events. For 8356/8356 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13317 event pairs, 865 based on Foata normal form. 48/3662 useless extension candidates. Maximal degree in co-relation 11921. Up to 2263 conditions per place. [2023-11-17 16:13:40,165 INFO L140 encePairwiseOnDemand]: 225/230 looper letters, 60 selfloop transitions, 17 changer transitions 12/89 dead transitions. [2023-11-17 16:13:40,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 89 transitions, 654 flow [2023-11-17 16:13:40,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:13:40,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:13:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 578 transitions. [2023-11-17 16:13:40,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026086956521739 [2023-11-17 16:13:40,168 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 578 transitions. [2023-11-17 16:13:40,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 578 transitions. [2023-11-17 16:13:40,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:40,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 578 transitions. [2023-11-17 16:13:40,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:40,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:40,171 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:40,171 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 395 flow. Second operand 5 states and 578 transitions. [2023-11-17 16:13:40,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 89 transitions, 654 flow [2023-11-17 16:13:40,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 611 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-17 16:13:40,206 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 376 flow [2023-11-17 16:13:40,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=376, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2023-11-17 16:13:40,208 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 29 predicate places. [2023-11-17 16:13:40,208 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 376 flow [2023-11-17 16:13:40,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:40,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:40,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:40,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 16:13:40,209 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:40,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:40,209 INFO L85 PathProgramCache]: Analyzing trace with hash 601205993, now seen corresponding path program 1 times [2023-11-17 16:13:40,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:40,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051635698] [2023-11-17 16:13:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:40,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:40,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:40,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051635698] [2023-11-17 16:13:40,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051635698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:40,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634639741] [2023-11-17 16:13:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:40,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:40,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:40,327 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 16:13:40,354 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 16:13:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:40,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:13:40,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:40,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:13:40,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634639741] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:40,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:40,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-11-17 16:13:40,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847421973] [2023-11-17 16:13:40,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:40,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:13:40,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:13:40,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:13:40,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 230 [2023-11-17 16:13:40,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 376 flow. Second operand has 7 states, 7 states have (on average 120.85714285714286) internal successors, (846), 7 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:40,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:40,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 230 [2023-11-17 16:13:40,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:41,192 INFO L124 PetriNetUnfolderBase]: 5982/8052 cut-off events. [2023-11-17 16:13:41,193 INFO L125 PetriNetUnfolderBase]: For 17100/17100 co-relation queries the response was YES. [2023-11-17 16:13:41,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28357 conditions, 8052 events. 5982/8052 cut-off events. For 17100/17100 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 35211 event pairs, 664 based on Foata normal form. 377/8429 useless extension candidates. Maximal degree in co-relation 24604. Up to 3765 conditions per place. [2023-11-17 16:13:41,300 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 146 selfloop transitions, 42 changer transitions 5/193 dead transitions. [2023-11-17 16:13:41,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 193 transitions, 1419 flow [2023-11-17 16:13:41,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:13:41,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:13:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 936 transitions. [2023-11-17 16:13:41,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813664596273292 [2023-11-17 16:13:41,303 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 936 transitions. [2023-11-17 16:13:41,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 936 transitions. [2023-11-17 16:13:41,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:41,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 936 transitions. [2023-11-17 16:13:41,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 133.71428571428572) internal successors, (936), 7 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:41,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:41,308 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:41,308 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 376 flow. Second operand 7 states and 936 transitions. [2023-11-17 16:13:41,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 193 transitions, 1419 flow [2023-11-17 16:13:41,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 193 transitions, 1345 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 16:13:41,387 INFO L231 Difference]: Finished difference. Result has 71 places, 91 transitions, 754 flow [2023-11-17 16:13:41,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=754, PETRI_PLACES=71, PETRI_TRANSITIONS=91} [2023-11-17 16:13:41,388 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2023-11-17 16:13:41,388 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 91 transitions, 754 flow [2023-11-17 16:13:41,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.85714285714286) internal successors, (846), 7 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:41,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:41,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:41,395 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 16:13:41,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:41,595 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:41,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:41,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1829277567, now seen corresponding path program 2 times [2023-11-17 16:13:41,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:41,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622702535] [2023-11-17 16:13:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:41,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:41,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:41,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622702535] [2023-11-17 16:13:41,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622702535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:41,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852638378] [2023-11-17 16:13:41,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:13:41,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:41,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:41,701 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 16:13:41,718 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 16:13:41,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:13:41,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:41,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:13:41,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:41,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:41,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852638378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:41,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:41,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-11-17 16:13:41,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342582439] [2023-11-17 16:13:41,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:41,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:13:41,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:41,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:13:41,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:13:41,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 230 [2023-11-17 16:13:41,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 91 transitions, 754 flow. Second operand has 7 states, 7 states have (on average 120.85714285714286) internal successors, (846), 7 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:41,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:41,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 230 [2023-11-17 16:13:41,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:42,983 INFO L124 PetriNetUnfolderBase]: 8608/11589 cut-off events. [2023-11-17 16:13:42,983 INFO L125 PetriNetUnfolderBase]: For 25805/25805 co-relation queries the response was YES. [2023-11-17 16:13:43,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42848 conditions, 11589 events. 8608/11589 cut-off events. For 25805/25805 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 53536 event pairs, 1130 based on Foata normal form. 245/11834 useless extension candidates. Maximal degree in co-relation 39980. Up to 8166 conditions per place. [2023-11-17 16:13:43,051 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 167 selfloop transitions, 30 changer transitions 5/202 dead transitions. [2023-11-17 16:13:43,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 202 transitions, 1615 flow [2023-11-17 16:13:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:13:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:13:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 932 transitions. [2023-11-17 16:13:43,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788819875776398 [2023-11-17 16:13:43,054 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 932 transitions. [2023-11-17 16:13:43,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 932 transitions. [2023-11-17 16:13:43,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:43,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 932 transitions. [2023-11-17 16:13:43,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 133.14285714285714) internal successors, (932), 7 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,060 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,060 INFO L175 Difference]: Start difference. First operand has 71 places, 91 transitions, 754 flow. Second operand 7 states and 932 transitions. [2023-11-17 16:13:43,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 202 transitions, 1615 flow [2023-11-17 16:13:43,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 202 transitions, 1561 flow, removed 27 selfloop flow, removed 0 redundant places. [2023-11-17 16:13:43,222 INFO L231 Difference]: Finished difference. Result has 80 places, 114 transitions, 987 flow [2023-11-17 16:13:43,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=987, PETRI_PLACES=80, PETRI_TRANSITIONS=114} [2023-11-17 16:13:43,223 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 42 predicate places. [2023-11-17 16:13:43,223 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 114 transitions, 987 flow [2023-11-17 16:13:43,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.85714285714286) internal successors, (846), 7 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:43,223 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] [2023-11-17 16:13:43,236 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 16:13:43,429 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,SelfDestructingSolverStorable14 [2023-11-17 16:13:43,430 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:43,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:43,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1554875324, now seen corresponding path program 3 times [2023-11-17 16:13:43,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:43,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871512915] [2023-11-17 16:13:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:43,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:43,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:43,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871512915] [2023-11-17 16:13:43,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871512915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:43,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907631975] [2023-11-17 16:13:43,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:13:43,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:43,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:43,550 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 16:13:43,569 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 16:13:43,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:13:43,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:43,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:13:43,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:43,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:43,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907631975] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:43,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:43,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-17 16:13:43,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076230867] [2023-11-17 16:13:43,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:43,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:13:43,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:43,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:13:43,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:13:43,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:43,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 114 transitions, 987 flow. Second operand has 11 states, 11 states have (on average 106.27272727272727) internal successors, (1169), 11 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:43,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:43,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:45,409 INFO L124 PetriNetUnfolderBase]: 13502/18244 cut-off events. [2023-11-17 16:13:45,409 INFO L125 PetriNetUnfolderBase]: For 47107/47107 co-relation queries the response was YES. [2023-11-17 16:13:45,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69860 conditions, 18244 events. 13502/18244 cut-off events. For 47107/47107 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 90213 event pairs, 1921 based on Foata normal form. 278/18522 useless extension candidates. Maximal degree in co-relation 66295. Up to 5106 conditions per place. [2023-11-17 16:13:45,501 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 300 selfloop transitions, 63 changer transitions 0/363 dead transitions. [2023-11-17 16:13:45,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 363 transitions, 3279 flow [2023-11-17 16:13:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:13:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:13:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1178 transitions. [2023-11-17 16:13:45,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121739130434783 [2023-11-17 16:13:45,505 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1178 transitions. [2023-11-17 16:13:45,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1178 transitions. [2023-11-17 16:13:45,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:45,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1178 transitions. [2023-11-17 16:13:45,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 117.8) internal successors, (1178), 10 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:45,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 230.0) internal successors, (2530), 11 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:45,512 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 230.0) internal successors, (2530), 11 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:45,512 INFO L175 Difference]: Start difference. First operand has 80 places, 114 transitions, 987 flow. Second operand 10 states and 1178 transitions. [2023-11-17 16:13:45,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 363 transitions, 3279 flow [2023-11-17 16:13:45,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 363 transitions, 3037 flow, removed 121 selfloop flow, removed 0 redundant places. [2023-11-17 16:13:45,752 INFO L231 Difference]: Finished difference. Result has 96 places, 155 transitions, 1601 flow [2023-11-17 16:13:45,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1601, PETRI_PLACES=96, PETRI_TRANSITIONS=155} [2023-11-17 16:13:45,753 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 58 predicate places. [2023-11-17 16:13:45,753 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 155 transitions, 1601 flow [2023-11-17 16:13:45,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 106.27272727272727) internal successors, (1169), 11 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:45,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:45,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:45,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 16:13:45,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 16:13:45,955 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:45,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:45,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1262178426, now seen corresponding path program 1 times [2023-11-17 16:13:45,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:45,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870243200] [2023-11-17 16:13:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:45,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:46,013 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 16:13:46,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:46,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870243200] [2023-11-17 16:13:46,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870243200] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:46,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34020734] [2023-11-17 16:13:46,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:46,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:46,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:46,015 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 16:13:46,018 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 16:13:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:46,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:13:46,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:46,144 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 16:13:46,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:46,172 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 16:13:46,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34020734] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:46,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:46,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 16:13:46,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331303428] [2023-11-17 16:13:46,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:46,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:13:46,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:46,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:13:46,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:13:46,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:46,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 155 transitions, 1601 flow. Second operand has 8 states, 8 states have (on average 106.75) internal successors, (854), 8 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:46,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:46,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:46,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:48,701 INFO L124 PetriNetUnfolderBase]: 19158/25851 cut-off events. [2023-11-17 16:13:48,702 INFO L125 PetriNetUnfolderBase]: For 132965/132965 co-relation queries the response was YES. [2023-11-17 16:13:48,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110564 conditions, 25851 events. 19158/25851 cut-off events. For 132965/132965 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 136817 event pairs, 3803 based on Foata normal form. 696/26547 useless extension candidates. Maximal degree in co-relation 102757. Up to 7400 conditions per place. [2023-11-17 16:13:48,879 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 624 selfloop transitions, 30 changer transitions 0/654 dead transitions. [2023-11-17 16:13:48,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 654 transitions, 8060 flow [2023-11-17 16:13:48,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:13:48,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:13:48,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 827 transitions. [2023-11-17 16:13:48,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513664596273292 [2023-11-17 16:13:48,883 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 827 transitions. [2023-11-17 16:13:48,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 827 transitions. [2023-11-17 16:13:48,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:48,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 827 transitions. [2023-11-17 16:13:48,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 118.14285714285714) internal successors, (827), 7 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:48,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:48,889 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:48,889 INFO L175 Difference]: Start difference. First operand has 96 places, 155 transitions, 1601 flow. Second operand 7 states and 827 transitions. [2023-11-17 16:13:48,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 654 transitions, 8060 flow [2023-11-17 16:13:49,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 654 transitions, 7636 flow, removed 172 selfloop flow, removed 2 redundant places. [2023-11-17 16:13:49,507 INFO L231 Difference]: Finished difference. Result has 105 places, 183 transitions, 1795 flow [2023-11-17 16:13:49,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1795, PETRI_PLACES=105, PETRI_TRANSITIONS=183} [2023-11-17 16:13:49,508 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 67 predicate places. [2023-11-17 16:13:49,508 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 183 transitions, 1795 flow [2023-11-17 16:13:49,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 106.75) internal successors, (854), 8 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:49,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:49,509 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] [2023-11-17 16:13:49,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 16:13:49,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:49,716 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:49,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:49,716 INFO L85 PathProgramCache]: Analyzing trace with hash -16815868, now seen corresponding path program 4 times [2023-11-17 16:13:49,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:49,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191876337] [2023-11-17 16:13:49,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:49,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:49,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:49,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191876337] [2023-11-17 16:13:49,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191876337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:49,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065139668] [2023-11-17 16:13:49,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:13:49,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:49,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:49,805 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 16:13:49,824 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 16:13:49,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:13:49,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:49,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:13:49,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:49,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:50,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065139668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:50,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:50,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 16:13:50,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743911042] [2023-11-17 16:13:50,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:50,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:13:50,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:50,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:13:50,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:13:50,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:50,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 183 transitions, 1795 flow. Second operand has 12 states, 12 states have (on average 105.5) internal successors, (1266), 12 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:50,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:50,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:50,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:53,431 INFO L124 PetriNetUnfolderBase]: 24517/32690 cut-off events. [2023-11-17 16:13:53,431 INFO L125 PetriNetUnfolderBase]: For 183380/183380 co-relation queries the response was YES. [2023-11-17 16:13:53,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157998 conditions, 32690 events. 24517/32690 cut-off events. For 183380/183380 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 168972 event pairs, 6977 based on Foata normal form. 864/33554 useless extension candidates. Maximal degree in co-relation 144940. Up to 23307 conditions per place. [2023-11-17 16:13:53,810 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 447 selfloop transitions, 90 changer transitions 6/543 dead transitions. [2023-11-17 16:13:53,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 543 transitions, 5672 flow [2023-11-17 16:13:53,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 16:13:53,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 16:13:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1389 transitions. [2023-11-17 16:13:53,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032608695652174 [2023-11-17 16:13:53,815 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1389 transitions. [2023-11-17 16:13:53,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1389 transitions. [2023-11-17 16:13:53,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:53,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1389 transitions. [2023-11-17 16:13:53,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.75) internal successors, (1389), 12 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:53,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:53,824 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:53,824 INFO L175 Difference]: Start difference. First operand has 105 places, 183 transitions, 1795 flow. Second operand 12 states and 1389 transitions. [2023-11-17 16:13:53,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 543 transitions, 5672 flow [2023-11-17 16:13:55,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 543 transitions, 5462 flow, removed 94 selfloop flow, removed 1 redundant places. [2023-11-17 16:13:55,071 INFO L231 Difference]: Finished difference. Result has 120 places, 240 transitions, 2641 flow [2023-11-17 16:13:55,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2641, PETRI_PLACES=120, PETRI_TRANSITIONS=240} [2023-11-17 16:13:55,072 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 82 predicate places. [2023-11-17 16:13:55,072 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 240 transitions, 2641 flow [2023-11-17 16:13:55,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 105.5) internal successors, (1266), 12 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:55,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:55,072 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] [2023-11-17 16:13:55,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 16:13:55,278 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,SelfDestructingSolverStorable17 [2023-11-17 16:13:55,278 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 2 more)] === [2023-11-17 16:13:55,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:55,279 INFO L85 PathProgramCache]: Analyzing trace with hash 111508134, now seen corresponding path program 5 times [2023-11-17 16:13:55,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:55,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600015675] [2023-11-17 16:13:55,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:55,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:55,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:55,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600015675] [2023-11-17 16:13:55,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600015675] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:55,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435906317] [2023-11-17 16:13:55,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:13:55,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:55,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:55,375 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 16:13:55,392 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 16:13:55,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:13:55,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:55,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:13:55,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:55,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:55,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435906317] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:55,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:55,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 16:13:55,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954034520] [2023-11-17 16:13:55,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:55,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:13:55,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:55,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:13:55,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:13:55,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:13:55,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 240 transitions, 2641 flow. Second operand has 12 states, 12 states have (on average 105.08333333333333) internal successors, (1261), 12 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:55,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:55,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:13:55,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:59,475 INFO L124 PetriNetUnfolderBase]: 26075/34736 cut-off events. [2023-11-17 16:13:59,475 INFO L125 PetriNetUnfolderBase]: For 246243/246243 co-relation queries the response was YES. [2023-11-17 16:13:59,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184659 conditions, 34736 events. 26075/34736 cut-off events. For 246243/246243 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 180809 event pairs, 7946 based on Foata normal form. 640/35376 useless extension candidates. Maximal degree in co-relation 166866. Up to 25576 conditions per place. [2023-11-17 16:13:59,756 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 530 selfloop transitions, 150 changer transitions 0/680 dead transitions. [2023-11-17 16:13:59,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 680 transitions, 7599 flow [2023-11-17 16:13:59,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:13:59,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:13:59,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1947 transitions. [2023-11-17 16:13:59,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4979539641943734 [2023-11-17 16:13:59,760 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1947 transitions. [2023-11-17 16:13:59,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1947 transitions. [2023-11-17 16:13:59,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:59,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1947 transitions. [2023-11-17 16:13:59,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 114.52941176470588) internal successors, (1947), 17 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:59,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 230.0) internal successors, (4140), 18 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:59,771 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 230.0) internal successors, (4140), 18 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:59,771 INFO L175 Difference]: Start difference. First operand has 120 places, 240 transitions, 2641 flow. Second operand 17 states and 1947 transitions. [2023-11-17 16:13:59,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 680 transitions, 7599 flow [2023-11-17 16:14:02,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 680 transitions, 7151 flow, removed 166 selfloop flow, removed 3 redundant places. [2023-11-17 16:14:02,048 INFO L231 Difference]: Finished difference. Result has 137 places, 302 transitions, 3447 flow [2023-11-17 16:14:02,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3447, PETRI_PLACES=137, PETRI_TRANSITIONS=302} [2023-11-17 16:14:02,049 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 99 predicate places. [2023-11-17 16:14:02,049 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 302 transitions, 3447 flow [2023-11-17 16:14:02,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 105.08333333333333) internal successors, (1261), 12 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:02,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:02,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:02,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 16:14:02,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:02,250 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 2 more)] === [2023-11-17 16:14:02,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:02,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1991767895, now seen corresponding path program 1 times [2023-11-17 16:14:02,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:02,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538248408] [2023-11-17 16:14:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:02,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:02,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:02,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538248408] [2023-11-17 16:14:02,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538248408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:14:02,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:14:02,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:14:02,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330627560] [2023-11-17 16:14:02,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:14:02,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:14:02,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:02,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:14:02,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:14:02,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:14:02,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 302 transitions, 3447 flow. Second operand has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:02,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:02,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:14:02,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:06,397 INFO L124 PetriNetUnfolderBase]: 26877/35888 cut-off events. [2023-11-17 16:14:06,397 INFO L125 PetriNetUnfolderBase]: For 301227/301227 co-relation queries the response was YES. [2023-11-17 16:14:06,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193811 conditions, 35888 events. 26877/35888 cut-off events. For 301227/301227 co-relation queries the response was YES. Maximal size of possible extension queue 1115. Compared 192311 event pairs, 7624 based on Foata normal form. 308/36196 useless extension candidates. Maximal degree in co-relation 175342. Up to 23444 conditions per place. [2023-11-17 16:14:06,741 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 741 selfloop transitions, 12 changer transitions 2/755 dead transitions. [2023-11-17 16:14:06,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 755 transitions, 10443 flow [2023-11-17 16:14:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:14:06,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:14:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-11-17 16:14:06,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5165217391304348 [2023-11-17 16:14:06,742 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-11-17 16:14:06,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-11-17 16:14:06,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:06,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-11-17 16:14:06,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:06,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:06,746 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:06,746 INFO L175 Difference]: Start difference. First operand has 137 places, 302 transitions, 3447 flow. Second operand 5 states and 594 transitions. [2023-11-17 16:14:06,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 755 transitions, 10443 flow [2023-11-17 16:14:08,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 755 transitions, 9063 flow, removed 394 selfloop flow, removed 9 redundant places. [2023-11-17 16:14:08,909 INFO L231 Difference]: Finished difference. Result has 134 places, 304 transitions, 2965 flow [2023-11-17 16:14:08,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=2904, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2965, PETRI_PLACES=134, PETRI_TRANSITIONS=304} [2023-11-17 16:14:08,910 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 96 predicate places. [2023-11-17 16:14:08,910 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 304 transitions, 2965 flow [2023-11-17 16:14:08,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:08,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:08,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:08,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-17 16:14:08,911 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 2 more)] === [2023-11-17 16:14:08,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:08,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1282347315, now seen corresponding path program 2 times [2023-11-17 16:14:08,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:08,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623066181] [2023-11-17 16:14:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:08,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:08,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:08,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623066181] [2023-11-17 16:14:08,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623066181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:08,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043170739] [2023-11-17 16:14:08,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:14:08,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:08,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:08,969 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:14:08,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 16:14:09,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:14:09,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:09,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:14:09,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:09,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:09,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043170739] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:09,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:09,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 16:14:09,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458342803] [2023-11-17 16:14:09,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:09,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:14:09,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:09,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:14:09,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:14:09,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:14:09,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 304 transitions, 2965 flow. Second operand has 8 states, 8 states have (on average 107.0) internal successors, (856), 8 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:09,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:09,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:14:09,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:14,730 INFO L124 PetriNetUnfolderBase]: 37067/49256 cut-off events. [2023-11-17 16:14:14,731 INFO L125 PetriNetUnfolderBase]: For 399279/399279 co-relation queries the response was YES. [2023-11-17 16:14:15,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271569 conditions, 49256 events. 37067/49256 cut-off events. For 399279/399279 co-relation queries the response was YES. Maximal size of possible extension queue 1531. Compared 269100 event pairs, 6070 based on Foata normal form. 636/49892 useless extension candidates. Maximal degree in co-relation 244256. Up to 17167 conditions per place. [2023-11-17 16:14:15,202 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 1049 selfloop transitions, 50 changer transitions 0/1099 dead transitions. [2023-11-17 16:14:15,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 1099 transitions, 13164 flow [2023-11-17 16:14:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:14:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:14:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 819 transitions. [2023-11-17 16:14:15,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508695652173913 [2023-11-17 16:14:15,204 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 819 transitions. [2023-11-17 16:14:15,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 819 transitions. [2023-11-17 16:14:15,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:15,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 819 transitions. [2023-11-17 16:14:15,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:15,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:15,208 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:15,208 INFO L175 Difference]: Start difference. First operand has 134 places, 304 transitions, 2965 flow. Second operand 7 states and 819 transitions. [2023-11-17 16:14:15,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 1099 transitions, 13164 flow [2023-11-17 16:14:18,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 1099 transitions, 13048 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 16:14:18,773 INFO L231 Difference]: Finished difference. Result has 143 places, 332 transitions, 3418 flow [2023-11-17 16:14:18,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=2938, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3418, PETRI_PLACES=143, PETRI_TRANSITIONS=332} [2023-11-17 16:14:18,774 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 105 predicate places. [2023-11-17 16:14:18,774 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 332 transitions, 3418 flow [2023-11-17 16:14:18,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 107.0) internal successors, (856), 8 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:18,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:18,774 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] [2023-11-17 16:14:18,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 16:14:18,974 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,SelfDestructingSolverStorable20 [2023-11-17 16:14:18,975 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 2 more)] === [2023-11-17 16:14:18,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1000529012, now seen corresponding path program 6 times [2023-11-17 16:14:18,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:18,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684759943] [2023-11-17 16:14:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:18,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:19,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:19,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684759943] [2023-11-17 16:14:19,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684759943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:19,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171898076] [2023-11-17 16:14:19,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:14:19,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:19,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:19,054 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:14:19,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 16:14:19,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:14:19,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:19,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:14:19,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:19,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:19,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171898076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:19,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:19,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-17 16:14:19,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929547265] [2023-11-17 16:14:19,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:19,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:14:19,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:19,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:14:19,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:14:19,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:14:19,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 332 transitions, 3418 flow. Second operand has 11 states, 11 states have (on average 105.27272727272727) internal successors, (1158), 11 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:19,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:19,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:14:19,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:25,109 INFO L124 PetriNetUnfolderBase]: 37671/50132 cut-off events. [2023-11-17 16:14:25,110 INFO L125 PetriNetUnfolderBase]: For 484092/484092 co-relation queries the response was YES. [2023-11-17 16:14:25,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298110 conditions, 50132 events. 37671/50132 cut-off events. For 484092/484092 co-relation queries the response was YES. Maximal size of possible extension queue 1570. Compared 274673 event pairs, 10794 based on Foata normal form. 174/50306 useless extension candidates. Maximal degree in co-relation 265799. Up to 33007 conditions per place. [2023-11-17 16:14:25,761 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 477 selfloop transitions, 69 changer transitions 10/556 dead transitions. [2023-11-17 16:14:25,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 556 transitions, 6807 flow [2023-11-17 16:14:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:14:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:14:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 830 transitions. [2023-11-17 16:14:25,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515527950310559 [2023-11-17 16:14:25,763 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 830 transitions. [2023-11-17 16:14:25,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 830 transitions. [2023-11-17 16:14:25,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:25,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 830 transitions. [2023-11-17 16:14:25,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 118.57142857142857) internal successors, (830), 7 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:25,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:25,766 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:25,767 INFO L175 Difference]: Start difference. First operand has 143 places, 332 transitions, 3418 flow. Second operand 7 states and 830 transitions. [2023-11-17 16:14:25,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 556 transitions, 6807 flow [2023-11-17 16:14:28,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 556 transitions, 6727 flow, removed 22 selfloop flow, removed 1 redundant places. [2023-11-17 16:14:28,937 INFO L231 Difference]: Finished difference. Result has 150 places, 335 transitions, 3596 flow [2023-11-17 16:14:28,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=3396, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3596, PETRI_PLACES=150, PETRI_TRANSITIONS=335} [2023-11-17 16:14:28,938 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 112 predicate places. [2023-11-17 16:14:28,938 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 335 transitions, 3596 flow [2023-11-17 16:14:28,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 105.27272727272727) internal successors, (1158), 11 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:28,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:28,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:28,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 16:14:29,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-17 16:14:29,143 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 2 more)] === [2023-11-17 16:14:29,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:29,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1035667161, now seen corresponding path program 3 times [2023-11-17 16:14:29,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:29,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560537701] [2023-11-17 16:14:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:29,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:29,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:29,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560537701] [2023-11-17 16:14:29,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560537701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:14:29,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:14:29,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:14:29,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689901903] [2023-11-17 16:14:29,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:14:29,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:14:29,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:29,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:14:29,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:14:29,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:14:29,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 335 transitions, 3596 flow. Second operand has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:29,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:29,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:14:29,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:35,401 INFO L124 PetriNetUnfolderBase]: 39909/53004 cut-off events. [2023-11-17 16:14:35,401 INFO L125 PetriNetUnfolderBase]: For 538401/538401 co-relation queries the response was YES. [2023-11-17 16:14:35,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320412 conditions, 53004 events. 39909/53004 cut-off events. For 538401/538401 co-relation queries the response was YES. Maximal size of possible extension queue 1658. Compared 290985 event pairs, 13531 based on Foata normal form. 314/53318 useless extension candidates. Maximal degree in co-relation 302213. Up to 41299 conditions per place. [2023-11-17 16:14:35,982 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 712 selfloop transitions, 48 changer transitions 5/765 dead transitions. [2023-11-17 16:14:35,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 765 transitions, 10065 flow [2023-11-17 16:14:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:14:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:14:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 585 transitions. [2023-11-17 16:14:35,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508695652173913 [2023-11-17 16:14:35,983 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 585 transitions. [2023-11-17 16:14:35,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 585 transitions. [2023-11-17 16:14:35,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:35,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 585 transitions. [2023-11-17 16:14:35,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:35,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:35,985 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:35,985 INFO L175 Difference]: Start difference. First operand has 150 places, 335 transitions, 3596 flow. Second operand 5 states and 585 transitions. [2023-11-17 16:14:35,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 765 transitions, 10065 flow [2023-11-17 16:14:39,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 765 transitions, 9626 flow, removed 31 selfloop flow, removed 4 redundant places. [2023-11-17 16:14:39,946 INFO L231 Difference]: Finished difference. Result has 153 places, 355 transitions, 3867 flow [2023-11-17 16:14:39,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3867, PETRI_PLACES=153, PETRI_TRANSITIONS=355} [2023-11-17 16:14:39,947 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 115 predicate places. [2023-11-17 16:14:39,947 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 355 transitions, 3867 flow [2023-11-17 16:14:39,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:39,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:39,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:39,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-17 16:14:39,947 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 2 more)] === [2023-11-17 16:14:39,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:39,948 INFO L85 PathProgramCache]: Analyzing trace with hash -541736463, now seen corresponding path program 4 times [2023-11-17 16:14:39,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:39,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285064587] [2023-11-17 16:14:39,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:39,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:40,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:40,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:40,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285064587] [2023-11-17 16:14:40,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285064587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:14:40,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:14:40,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:14:40,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31361580] [2023-11-17 16:14:40,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:14:40,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:14:40,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:40,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:14:40,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:14:40,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:14:40,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 355 transitions, 3867 flow. Second operand has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:40,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:40,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:14:40,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:46,670 INFO L124 PetriNetUnfolderBase]: 39595/52690 cut-off events. [2023-11-17 16:14:46,670 INFO L125 PetriNetUnfolderBase]: For 585415/585415 co-relation queries the response was YES. [2023-11-17 16:14:47,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332054 conditions, 52690 events. 39595/52690 cut-off events. For 585415/585415 co-relation queries the response was YES. Maximal size of possible extension queue 1665. Compared 291493 event pairs, 12257 based on Foata normal form. 314/53004 useless extension candidates. Maximal degree in co-relation 314021. Up to 40223 conditions per place. [2023-11-17 16:14:47,695 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 724 selfloop transitions, 61 changer transitions 5/790 dead transitions. [2023-11-17 16:14:47,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 790 transitions, 10242 flow [2023-11-17 16:14:47,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:14:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:14:47,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 585 transitions. [2023-11-17 16:14:47,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508695652173913 [2023-11-17 16:14:47,720 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 585 transitions. [2023-11-17 16:14:47,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 585 transitions. [2023-11-17 16:14:47,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:47,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 585 transitions. [2023-11-17 16:14:47,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:47,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:47,727 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:47,727 INFO L175 Difference]: Start difference. First operand has 153 places, 355 transitions, 3867 flow. Second operand 5 states and 585 transitions. [2023-11-17 16:14:47,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 790 transitions, 10242 flow [2023-11-17 16:14:53,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 790 transitions, 10046 flow, removed 51 selfloop flow, removed 2 redundant places. [2023-11-17 16:14:53,343 INFO L231 Difference]: Finished difference. Result has 157 places, 375 transitions, 4186 flow [2023-11-17 16:14:53,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=3691, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4186, PETRI_PLACES=157, PETRI_TRANSITIONS=375} [2023-11-17 16:14:53,344 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 119 predicate places. [2023-11-17 16:14:53,344 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 375 transitions, 4186 flow [2023-11-17 16:14:53,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:53,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:53,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:53,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-17 16:14:53,345 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 2 more)] === [2023-11-17 16:14:53,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:53,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1170098559, now seen corresponding path program 5 times [2023-11-17 16:14:53,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:53,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54778514] [2023-11-17 16:14:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:53,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:53,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:53,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54778514] [2023-11-17 16:14:53,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54778514] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:14:53,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:14:53,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:14:53,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513260317] [2023-11-17 16:14:53,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:14:53,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:14:53,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:53,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:14:53,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:14:53,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-11-17 16:14:53,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 375 transitions, 4186 flow. Second operand has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:53,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:53,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-11-17 16:14:53,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:59,037 INFO L124 PetriNetUnfolderBase]: 41705/55444 cut-off events. [2023-11-17 16:14:59,037 INFO L125 PetriNetUnfolderBase]: For 619166/619166 co-relation queries the response was YES. [2023-11-17 16:14:59,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356250 conditions, 55444 events. 41705/55444 cut-off events. For 619166/619166 co-relation queries the response was YES. Maximal size of possible extension queue 1772. Compared 308254 event pairs, 12757 based on Foata normal form. 644/56088 useless extension candidates. Maximal degree in co-relation 337165. Up to 42653 conditions per place. [2023-11-17 16:14:59,911 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 728 selfloop transitions, 65 changer transitions 1/794 dead transitions. [2023-11-17 16:14:59,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 794 transitions, 10263 flow [2023-11-17 16:14:59,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:14:59,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:14:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 583 transitions. [2023-11-17 16:14:59,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069565217391304 [2023-11-17 16:14:59,913 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 583 transitions. [2023-11-17 16:14:59,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 583 transitions. [2023-11-17 16:14:59,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:59,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 583 transitions. [2023-11-17 16:14:59,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:59,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:59,914 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:59,914 INFO L175 Difference]: Start difference. First operand has 157 places, 375 transitions, 4186 flow. Second operand 5 states and 583 transitions. [2023-11-17 16:14:59,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 794 transitions, 10263 flow