/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:34:35,299 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:34:35,379 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 16:34:35,413 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:34:35,414 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:34:35,415 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:34:35,415 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:34:35,416 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:34:35,416 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:34:35,420 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:34:35,420 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:34:35,421 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:34:35,421 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:34:35,422 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:34:35,422 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:34:35,422 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:34:35,423 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:34:35,423 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:34:35,424 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:34:35,424 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:34:35,424 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:34:35,425 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:34:35,425 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:34:35,425 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:34:35,425 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:34:35,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:34:35,427 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:34:35,427 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:34:35,427 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:34:35,427 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:34:35,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:34:35,428 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:34:35,428 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:34:35,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:34:35,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:34:35,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:34:35,686 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:34:35,686 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:34:35,687 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-11-17 16:34:36,946 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:34:37,161 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:34:37,161 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-11-17 16:34:37,170 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f35545b/d1e91ba390eb4e6ca4f631f9b83a31db/FLAG4b904b7d3 [2023-11-17 16:34:37,188 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f35545b/d1e91ba390eb4e6ca4f631f9b83a31db [2023-11-17 16:34:37,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:34:37,192 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:34:37,195 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:34:37,196 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:34:37,200 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:34:37,201 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:34:37" (1/1) ... [2023-11-17 16:34:37,202 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@249a17b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:37, skipping insertion in model container [2023-11-17 16:34:37,202 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:34:37" (1/1) ... [2023-11-17 16:34:37,226 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:34:37,377 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2459,2472] [2023-11-17 16:34:37,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:34:37,394 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:34:37,411 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2459,2472] [2023-11-17 16:34:37,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:34:37,422 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:34:37,422 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:34:37,429 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:34:37,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:37 WrapperNode [2023-11-17 16:34:37,430 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:34:37,431 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:34:37,431 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:34:37,431 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:34:37,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:37" (1/1) ... [2023-11-17 16:34:37,447 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:37" (1/1) ... [2023-11-17 16:34:37,481 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 137 [2023-11-17 16:34:37,482 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:34:37,483 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:34:37,483 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:34:37,483 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:34:37,491 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:37" (1/1) ... [2023-11-17 16:34:37,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:37" (1/1) ... [2023-11-17 16:34:37,496 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:37" (1/1) ... [2023-11-17 16:34:37,496 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:37" (1/1) ... [2023-11-17 16:34:37,506 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:37" (1/1) ... [2023-11-17 16:34:37,510 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:37" (1/1) ... [2023-11-17 16:34:37,512 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:37" (1/1) ... [2023-11-17 16:34:37,513 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:37" (1/1) ... [2023-11-17 16:34:37,515 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:34:37,516 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:34:37,516 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:34:37,517 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:34:37,517 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:37" (1/1) ... [2023-11-17 16:34:37,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:34:37,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:37,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 16:34:37,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 16:34:37,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:34:37,596 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:34:37,596 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:34:37,596 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:34:37,597 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:34:37,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:34:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:34:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:34:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:34:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:34:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:34:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:34:37,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:34:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:34:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:34:37,600 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 16:34:37,694 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:34:37,707 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:34:37,947 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:34:38,051 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:34:38,051 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 16:34:38,053 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:34:38 BoogieIcfgContainer [2023-11-17 16:34:38,053 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:34:38,055 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:34:38,055 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:34:38,060 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:34:38,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:34:37" (1/3) ... [2023-11-17 16:34:38,061 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ea0ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:34:38, skipping insertion in model container [2023-11-17 16:34:38,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:34:37" (2/3) ... [2023-11-17 16:34:38,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ea0ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:34:38, skipping insertion in model container [2023-11-17 16:34:38,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:34:38" (3/3) ... [2023-11-17 16:34:38,063 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-11-17 16:34:38,077 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:34:38,077 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:34:38,077 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:34:38,158 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:34:38,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 252 flow [2023-11-17 16:34:38,272 INFO L124 PetriNetUnfolderBase]: 9/117 cut-off events. [2023-11-17 16:34:38,273 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:34:38,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-11-17 16:34:38,281 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 252 flow [2023-11-17 16:34:38,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 108 transitions, 228 flow [2023-11-17 16:34:38,290 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:34:38,302 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 108 transitions, 228 flow [2023-11-17 16:34:38,305 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 108 transitions, 228 flow [2023-11-17 16:34:38,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 108 transitions, 228 flow [2023-11-17 16:34:38,369 INFO L124 PetriNetUnfolderBase]: 9/108 cut-off events. [2023-11-17 16:34:38,370 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:34:38,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 108 events. 9/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-11-17 16:34:38,374 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-11-17 16:34:41,808 INFO L134 LiptonReduction]: Checked pairs total: 578 [2023-11-17 16:34:41,808 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-11-17 16:34:41,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:34:41,827 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;@45813ce1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:34:41,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 16:34:41,831 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:34:41,831 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-17 16:34:41,831 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:34:41,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:41,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:41,833 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:41,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:41,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1378278166, now seen corresponding path program 1 times [2023-11-17 16:34:41,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:41,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471710467] [2023-11-17 16:34:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:41,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:42,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:42,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471710467] [2023-11-17 16:34:42,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471710467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:34:42,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:34:42,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:34:42,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556070297] [2023-11-17 16:34:42,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:34:42,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:34:42,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:42,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:34:42,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:34:42,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 231 [2023-11-17 16:34:42,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:42,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:42,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 231 [2023-11-17 16:34:42,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:42,234 INFO L124 PetriNetUnfolderBase]: 60/106 cut-off events. [2023-11-17 16:34:42,234 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-17 16:34:42,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 106 events. 60/106 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 268 event pairs, 14 based on Foata normal form. 1/71 useless extension candidates. Maximal degree in co-relation 168. Up to 53 conditions per place. [2023-11-17 16:34:42,239 INFO L140 encePairwiseOnDemand]: 228/231 looper letters, 19 selfloop transitions, 2 changer transitions 2/25 dead transitions. [2023-11-17 16:34:42,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 25 transitions, 114 flow [2023-11-17 16:34:42,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:34:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:34:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-11-17 16:34:42,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2023-11-17 16:34:42,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-11-17 16:34:42,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-11-17 16:34:42,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:42,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-11-17 16:34:42,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:42,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:42,280 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:42,282 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 333 transitions. [2023-11-17 16:34:42,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 25 transitions, 114 flow [2023-11-17 16:34:42,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:34:42,288 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-11-17 16:34:42,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-11-17 16:34:42,296 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-17 16:34:42,296 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-11-17 16:34:42,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:42,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:42,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:42,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:34:42,298 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:42,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:42,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1261719986, now seen corresponding path program 1 times [2023-11-17 16:34:42,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:42,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728022553] [2023-11-17 16:34:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:42,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:42,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:42,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728022553] [2023-11-17 16:34:42,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728022553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:34:42,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:34:42,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:34:42,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153027615] [2023-11-17 16:34:42,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:34:42,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:34:42,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:42,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:34:42,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:34:42,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 231 [2023-11-17 16:34:42,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:42,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:42,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 231 [2023-11-17 16:34:42,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:42,569 INFO L124 PetriNetUnfolderBase]: 52/105 cut-off events. [2023-11-17 16:34:42,570 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 16:34:42,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 105 events. 52/105 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 308 event pairs, 17 based on Foata normal form. 6/94 useless extension candidates. Maximal degree in co-relation 138. Up to 74 conditions per place. [2023-11-17 16:34:42,573 INFO L140 encePairwiseOnDemand]: 228/231 looper letters, 18 selfloop transitions, 2 changer transitions 5/27 dead transitions. [2023-11-17 16:34:42,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 27 transitions, 121 flow [2023-11-17 16:34:42,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:34:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:34:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-11-17 16:34:42,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906204906204906 [2023-11-17 16:34:42,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-11-17 16:34:42,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-11-17 16:34:42,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:42,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-11-17 16:34:42,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:42,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:42,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:42,582 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 340 transitions. [2023-11-17 16:34:42,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 27 transitions, 121 flow [2023-11-17 16:34:42,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 27 transitions, 119 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:34:42,584 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 60 flow [2023-11-17 16:34:42,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2023-11-17 16:34:42,585 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-11-17 16:34:42,585 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 60 flow [2023-11-17 16:34:42,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:42,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:42,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:42,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:34:42,586 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:42,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:42,587 INFO L85 PathProgramCache]: Analyzing trace with hash -501695879, now seen corresponding path program 1 times [2023-11-17 16:34:42,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:42,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055342855] [2023-11-17 16:34:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:42,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:42,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:42,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055342855] [2023-11-17 16:34:42,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055342855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:34:42,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:34:42,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:34:42,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158345994] [2023-11-17 16:34:42,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:34:42,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:34:42,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:42,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:34:42,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:34:42,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 231 [2023-11-17 16:34:42,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:42,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:42,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 231 [2023-11-17 16:34:42,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:42,944 INFO L124 PetriNetUnfolderBase]: 61/138 cut-off events. [2023-11-17 16:34:42,944 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-11-17 16:34:42,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 138 events. 61/138 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 500 event pairs, 44 based on Foata normal form. 6/142 useless extension candidates. Maximal degree in co-relation 220. Up to 103 conditions per place. [2023-11-17 16:34:42,945 INFO L140 encePairwiseOnDemand]: 227/231 looper letters, 16 selfloop transitions, 2 changer transitions 10/30 dead transitions. [2023-11-17 16:34:42,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 30 transitions, 142 flow [2023-11-17 16:34:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:34:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:34:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2023-11-17 16:34:42,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4101731601731602 [2023-11-17 16:34:42,948 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2023-11-17 16:34:42,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2023-11-17 16:34:42,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:42,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2023-11-17 16:34:42,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:42,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:42,953 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:42,953 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 60 flow. Second operand 4 states and 379 transitions. [2023-11-17 16:34:42,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 30 transitions, 142 flow [2023-11-17 16:34:42,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:34:42,957 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 72 flow [2023-11-17 16:34:42,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2023-11-17 16:34:42,959 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-17 16:34:42,959 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 72 flow [2023-11-17 16:34:42,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:42,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:42,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:42,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:34:42,961 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:42,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:42,961 INFO L85 PathProgramCache]: Analyzing trace with hash -746487760, now seen corresponding path program 1 times [2023-11-17 16:34:42,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:42,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798357560] [2023-11-17 16:34:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:42,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:43,385 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 16:34:43,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:43,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798357560] [2023-11-17 16:34:43,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798357560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:43,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850347246] [2023-11-17 16:34:43,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:43,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:43,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:43,392 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:43,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 16:34:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:43,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:34:43,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:43,632 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 16:34:43,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2023-11-17 16:34:43,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 16:34:43,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 16:34:43,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 16:34:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:43,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:44,079 INFO L349 Elim1Store]: treesize reduction 89, result has 45.1 percent of original size [2023-11-17 16:34:44,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 253 treesize of output 271 [2023-11-17 16:34:44,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:34:44,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 271 [2023-11-17 16:34:44,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-17 16:34:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:44,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850347246] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:44,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:44,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2023-11-17 16:34:44,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701850861] [2023-11-17 16:34:44,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:44,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:34:44,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:44,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:34:44,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=137, Unknown=2, NotChecked=0, Total=182 [2023-11-17 16:34:44,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 231 [2023-11-17 16:34:44,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 20 transitions, 72 flow. Second operand has 14 states, 14 states have (on average 75.92857142857143) internal successors, (1063), 14 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:44,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:44,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 231 [2023-11-17 16:34:44,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:44,596 INFO L124 PetriNetUnfolderBase]: 68/135 cut-off events. [2023-11-17 16:34:44,596 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-17 16:34:44,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 135 events. 68/135 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 403 event pairs, 9 based on Foata normal form. 1/135 useless extension candidates. Maximal degree in co-relation 321. Up to 37 conditions per place. [2023-11-17 16:34:44,601 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 26 selfloop transitions, 6 changer transitions 9/43 dead transitions. [2023-11-17 16:34:44,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 43 transitions, 213 flow [2023-11-17 16:34:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:34:44,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:34:44,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 560 transitions. [2023-11-17 16:34:44,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3463203463203463 [2023-11-17 16:34:44,604 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 560 transitions. [2023-11-17 16:34:44,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 560 transitions. [2023-11-17 16:34:44,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:44,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 560 transitions. [2023-11-17 16:34:44,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:44,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 231.0) internal successors, (1848), 8 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:44,610 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 231.0) internal successors, (1848), 8 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:44,610 INFO L175 Difference]: Start difference. First operand has 26 places, 20 transitions, 72 flow. Second operand 7 states and 560 transitions. [2023-11-17 16:34:44,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 43 transitions, 213 flow [2023-11-17 16:34:44,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 43 transitions, 207 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 16:34:44,613 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 88 flow [2023-11-17 16:34:44,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=88, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2023-11-17 16:34:44,615 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-11-17 16:34:44,615 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 88 flow [2023-11-17 16:34:44,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 75.92857142857143) internal successors, (1063), 14 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:44,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:44,617 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:44,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 16:34:44,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:44,825 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:44,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:44,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2015139898, now seen corresponding path program 2 times [2023-11-17 16:34:44,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:44,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284453342] [2023-11-17 16:34:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:44,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:44,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:44,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284453342] [2023-11-17 16:34:44,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284453342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:44,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912434215] [2023-11-17 16:34:44,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:34:44,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:44,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:44,930 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:44,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 16:34:45,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:34:45,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:45,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:34:45,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:45,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:45,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912434215] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:45,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:45,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2023-11-17 16:34:45,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014795977] [2023-11-17 16:34:45,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:45,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:34:45,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:45,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:34:45,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:34:45,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 231 [2023-11-17 16:34:45,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:45,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:45,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 231 [2023-11-17 16:34:45,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:45,185 INFO L124 PetriNetUnfolderBase]: 140/278 cut-off events. [2023-11-17 16:34:45,185 INFO L125 PetriNetUnfolderBase]: For 213/213 co-relation queries the response was YES. [2023-11-17 16:34:45,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 278 events. 140/278 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1115 event pairs, 41 based on Foata normal form. 12/290 useless extension candidates. Maximal degree in co-relation 702. Up to 111 conditions per place. [2023-11-17 16:34:45,187 INFO L140 encePairwiseOnDemand]: 228/231 looper letters, 35 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-11-17 16:34:45,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 252 flow [2023-11-17 16:34:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:34:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:34:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 457 transitions. [2023-11-17 16:34:45,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945887445887446 [2023-11-17 16:34:45,189 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 457 transitions. [2023-11-17 16:34:45,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 457 transitions. [2023-11-17 16:34:45,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:45,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 457 transitions. [2023-11-17 16:34:45,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:45,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:45,195 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:45,195 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 88 flow. Second operand 4 states and 457 transitions. [2023-11-17 16:34:45,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 252 flow [2023-11-17 16:34:45,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 238 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-17 16:34:45,202 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 142 flow [2023-11-17 16:34:45,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-17 16:34:45,204 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-11-17 16:34:45,204 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 142 flow [2023-11-17 16:34:45,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:45,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:45,205 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:45,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:45,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:45,411 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:45,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:45,412 INFO L85 PathProgramCache]: Analyzing trace with hash 645020739, now seen corresponding path program 3 times [2023-11-17 16:34:45,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:45,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258192484] [2023-11-17 16:34:45,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:45,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:45,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:45,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258192484] [2023-11-17 16:34:45,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258192484] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:45,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997839769] [2023-11-17 16:34:45,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:34:45,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:45,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:45,586 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:45,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 16:34:45,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:34:45,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:45,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:34:45,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:45,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:46,077 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-17 16:34:46,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2023-11-17 16:34:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:46,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997839769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:46,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:46,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-11-17 16:34:46,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562736206] [2023-11-17 16:34:46,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:46,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:34:46,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:46,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:34:46,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:34:46,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 231 [2023-11-17 16:34:46,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 142 flow. Second operand has 15 states, 15 states have (on average 78.0) internal successors, (1170), 15 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:46,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:46,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 231 [2023-11-17 16:34:46,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:46,523 INFO L124 PetriNetUnfolderBase]: 194/416 cut-off events. [2023-11-17 16:34:46,523 INFO L125 PetriNetUnfolderBase]: For 560/560 co-relation queries the response was YES. [2023-11-17 16:34:46,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1200 conditions, 416 events. 194/416 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1992 event pairs, 78 based on Foata normal form. 19/435 useless extension candidates. Maximal degree in co-relation 816. Up to 178 conditions per place. [2023-11-17 16:34:46,526 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 26 selfloop transitions, 5 changer transitions 36/69 dead transitions. [2023-11-17 16:34:46,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 69 transitions, 418 flow [2023-11-17 16:34:46,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:34:46,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:34:46,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 737 transitions. [2023-11-17 16:34:46,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2023-11-17 16:34:46,529 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 737 transitions. [2023-11-17 16:34:46,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 737 transitions. [2023-11-17 16:34:46,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:46,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 737 transitions. [2023-11-17 16:34:46,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.88888888888889) internal successors, (737), 9 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:46,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 231.0) internal successors, (2310), 10 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:46,535 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 231.0) internal successors, (2310), 10 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:46,535 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 142 flow. Second operand 9 states and 737 transitions. [2023-11-17 16:34:46,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 69 transitions, 418 flow [2023-11-17 16:34:46,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 69 transitions, 408 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-11-17 16:34:46,541 INFO L231 Difference]: Finished difference. Result has 44 places, 27 transitions, 170 flow [2023-11-17 16:34:46,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=170, PETRI_PLACES=44, PETRI_TRANSITIONS=27} [2023-11-17 16:34:46,543 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-11-17 16:34:46,545 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 27 transitions, 170 flow [2023-11-17 16:34:46,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.0) internal successors, (1170), 15 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:46,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:46,550 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:46,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:46,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:46,756 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:46,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1642046884, now seen corresponding path program 4 times [2023-11-17 16:34:46,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:46,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947926746] [2023-11-17 16:34:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:46,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:34:47,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:47,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947926746] [2023-11-17 16:34:47,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947926746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:47,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630012637] [2023-11-17 16:34:47,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:34:47,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:47,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:47,052 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:47,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 16:34:47,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:34:47,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:47,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 16:34:47,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:34:47,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:47,298 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:34:47,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-11-17 16:34:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:34:47,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630012637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:47,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:47,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 14 [2023-11-17 16:34:47,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267021506] [2023-11-17 16:34:47,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:47,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 16:34:47,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:47,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 16:34:47,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-11-17 16:34:47,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 231 [2023-11-17 16:34:47,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 170 flow. Second operand has 16 states, 16 states have (on average 90.6875) internal successors, (1451), 16 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:47,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:47,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 231 [2023-11-17 16:34:47,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:47,795 INFO L124 PetriNetUnfolderBase]: 332/635 cut-off events. [2023-11-17 16:34:47,795 INFO L125 PetriNetUnfolderBase]: For 937/937 co-relation queries the response was YES. [2023-11-17 16:34:47,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1994 conditions, 635 events. 332/635 cut-off events. For 937/937 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3121 event pairs, 21 based on Foata normal form. 5/640 useless extension candidates. Maximal degree in co-relation 1956. Up to 126 conditions per place. [2023-11-17 16:34:47,799 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 68 selfloop transitions, 26 changer transitions 51/147 dead transitions. [2023-11-17 16:34:47,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 147 transitions, 886 flow [2023-11-17 16:34:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:34:47,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:34:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1728 transitions. [2023-11-17 16:34:47,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2023-11-17 16:34:47,806 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1728 transitions. [2023-11-17 16:34:47,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1728 transitions. [2023-11-17 16:34:47,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:47,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1728 transitions. [2023-11-17 16:34:47,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 96.0) internal successors, (1728), 18 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:47,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 231.0) internal successors, (4389), 19 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:47,821 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 231.0) internal successors, (4389), 19 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:47,821 INFO L175 Difference]: Start difference. First operand has 44 places, 27 transitions, 170 flow. Second operand 18 states and 1728 transitions. [2023-11-17 16:34:47,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 147 transitions, 886 flow [2023-11-17 16:34:47,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 147 transitions, 854 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-11-17 16:34:47,827 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 381 flow [2023-11-17 16:34:47,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=381, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2023-11-17 16:34:47,828 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2023-11-17 16:34:47,828 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 381 flow [2023-11-17 16:34:47,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 90.6875) internal successors, (1451), 16 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:47,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:47,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:47,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:48,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:48,037 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:48,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:48,037 INFO L85 PathProgramCache]: Analyzing trace with hash -56468956, now seen corresponding path program 5 times [2023-11-17 16:34:48,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:48,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721900759] [2023-11-17 16:34:48,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:48,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:34:48,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:48,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721900759] [2023-11-17 16:34:48,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721900759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:48,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803598756] [2023-11-17 16:34:48,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:34:48,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:48,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:48,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:48,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 16:34:48,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:34:48,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:48,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:34:48,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:48,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 16:34:48,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:34:48,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:48,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-17 16:34:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:48,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:49,210 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:34:49,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-11-17 16:34:49,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:34:49,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 172 [2023-11-17 16:34:49,230 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:34:49,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 48 [2023-11-17 16:34:49,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2023-11-17 16:34:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:49,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803598756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:49,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:49,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 22 [2023-11-17 16:34:49,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345052007] [2023-11-17 16:34:49,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:49,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:34:49,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:49,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:34:49,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:34:49,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 231 [2023-11-17 16:34:49,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 381 flow. Second operand has 24 states, 24 states have (on average 72.95833333333333) internal successors, (1751), 24 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:49,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:49,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 231 [2023-11-17 16:34:49,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:50,057 INFO L124 PetriNetUnfolderBase]: 380/722 cut-off events. [2023-11-17 16:34:50,057 INFO L125 PetriNetUnfolderBase]: For 1337/1337 co-relation queries the response was YES. [2023-11-17 16:34:50,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2435 conditions, 722 events. 380/722 cut-off events. For 1337/1337 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3567 event pairs, 55 based on Foata normal form. 1/723 useless extension candidates. Maximal degree in co-relation 2397. Up to 194 conditions per place. [2023-11-17 16:34:50,066 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 52 selfloop transitions, 26 changer transitions 30/110 dead transitions. [2023-11-17 16:34:50,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 110 transitions, 823 flow [2023-11-17 16:34:50,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 16:34:50,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 16:34:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1086 transitions. [2023-11-17 16:34:50,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3358070500927644 [2023-11-17 16:34:50,071 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1086 transitions. [2023-11-17 16:34:50,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1086 transitions. [2023-11-17 16:34:50,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:50,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1086 transitions. [2023-11-17 16:34:50,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 77.57142857142857) internal successors, (1086), 14 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:50,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:50,080 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:50,080 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 381 flow. Second operand 14 states and 1086 transitions. [2023-11-17 16:34:50,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 110 transitions, 823 flow [2023-11-17 16:34:50,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 110 transitions, 673 flow, removed 49 selfloop flow, removed 7 redundant places. [2023-11-17 16:34:50,090 INFO L231 Difference]: Finished difference. Result has 66 places, 49 transitions, 378 flow [2023-11-17 16:34:50,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=378, PETRI_PLACES=66, PETRI_TRANSITIONS=49} [2023-11-17 16:34:50,091 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 45 predicate places. [2023-11-17 16:34:50,092 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 49 transitions, 378 flow [2023-11-17 16:34:50,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 72.95833333333333) internal successors, (1751), 24 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:50,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:50,093 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:50,099 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 16:34:50,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:50,299 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:50,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:50,300 INFO L85 PathProgramCache]: Analyzing trace with hash -196418202, now seen corresponding path program 6 times [2023-11-17 16:34:50,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:50,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398105951] [2023-11-17 16:34:50,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:50,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:34:50,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:50,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398105951] [2023-11-17 16:34:50,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398105951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:50,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912895377] [2023-11-17 16:34:50,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:34:50,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:50,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:50,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:50,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 16:34:50,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:34:50,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:50,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:34:50,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:34:50,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:34:50,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912895377] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:50,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:50,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2023-11-17 16:34:50,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436680008] [2023-11-17 16:34:50,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:50,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:34:50,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:50,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:34:50,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:34:50,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 231 [2023-11-17 16:34:50,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 49 transitions, 378 flow. Second operand has 11 states, 11 states have (on average 91.0) internal successors, (1001), 11 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:50,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:50,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 231 [2023-11-17 16:34:50,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:51,224 INFO L124 PetriNetUnfolderBase]: 1113/2130 cut-off events. [2023-11-17 16:34:51,224 INFO L125 PetriNetUnfolderBase]: For 3787/3787 co-relation queries the response was YES. [2023-11-17 16:34:51,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6461 conditions, 2130 events. 1113/2130 cut-off events. For 3787/3787 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13449 event pairs, 219 based on Foata normal form. 54/2184 useless extension candidates. Maximal degree in co-relation 5506. Up to 517 conditions per place. [2023-11-17 16:34:51,237 INFO L140 encePairwiseOnDemand]: 226/231 looper letters, 55 selfloop transitions, 45 changer transitions 68/170 dead transitions. [2023-11-17 16:34:51,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 170 transitions, 1431 flow [2023-11-17 16:34:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 16:34:51,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 16:34:51,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1337 transitions. [2023-11-17 16:34:51,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2023-11-17 16:34:51,242 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1337 transitions. [2023-11-17 16:34:51,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1337 transitions. [2023-11-17 16:34:51,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:51,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1337 transitions. [2023-11-17 16:34:51,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 95.5) internal successors, (1337), 14 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:51,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:51,253 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:51,253 INFO L175 Difference]: Start difference. First operand has 66 places, 49 transitions, 378 flow. Second operand 14 states and 1337 transitions. [2023-11-17 16:34:51,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 170 transitions, 1431 flow [2023-11-17 16:34:51,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 170 transitions, 1331 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-11-17 16:34:51,270 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 732 flow [2023-11-17 16:34:51,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=732, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2023-11-17 16:34:51,271 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-11-17 16:34:51,271 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 732 flow [2023-11-17 16:34:51,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 91.0) internal successors, (1001), 11 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:51,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:51,272 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:51,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:51,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:51,479 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:51,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:51,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1362067052, now seen corresponding path program 7 times [2023-11-17 16:34:51,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:51,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100476273] [2023-11-17 16:34:51,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:51,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:51,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:51,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100476273] [2023-11-17 16:34:51,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100476273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:51,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148614263] [2023-11-17 16:34:51,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:34:51,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:51,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:51,864 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:51,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 16:34:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:51,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 16:34:51,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:34:52,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:52,174 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:34:52,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2023-11-17 16:34:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:34:52,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148614263] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:52,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:52,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 22 [2023-11-17 16:34:52,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784200955] [2023-11-17 16:34:52,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:52,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:34:52,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:52,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:34:52,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:34:52,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 231 [2023-11-17 16:34:52,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 732 flow. Second operand has 24 states, 24 states have (on average 84.04166666666667) internal successors, (2017), 24 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:52,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:52,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 231 [2023-11-17 16:34:52,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:53,530 INFO L124 PetriNetUnfolderBase]: 1226/2300 cut-off events. [2023-11-17 16:34:53,530 INFO L125 PetriNetUnfolderBase]: For 4739/4739 co-relation queries the response was YES. [2023-11-17 16:34:53,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7833 conditions, 2300 events. 1226/2300 cut-off events. For 4739/4739 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14204 event pairs, 97 based on Foata normal form. 7/2307 useless extension candidates. Maximal degree in co-relation 7780. Up to 474 conditions per place. [2023-11-17 16:34:53,584 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 121 selfloop transitions, 99 changer transitions 106/328 dead transitions. [2023-11-17 16:34:53,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 328 transitions, 2417 flow [2023-11-17 16:34:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-17 16:34:53,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-17 16:34:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3405 transitions. [2023-11-17 16:34:53,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879015721120984 [2023-11-17 16:34:53,595 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3405 transitions. [2023-11-17 16:34:53,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3405 transitions. [2023-11-17 16:34:53,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:53,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3405 transitions. [2023-11-17 16:34:53,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 89.60526315789474) internal successors, (3405), 38 states have internal predecessors, (3405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:53,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 231.0) internal successors, (9009), 39 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:53,623 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 231.0) internal successors, (9009), 39 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:53,623 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 732 flow. Second operand 38 states and 3405 transitions. [2023-11-17 16:34:53,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 328 transitions, 2417 flow [2023-11-17 16:34:53,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 328 transitions, 2329 flow, removed 42 selfloop flow, removed 5 redundant places. [2023-11-17 16:34:53,645 INFO L231 Difference]: Finished difference. Result has 111 places, 119 transitions, 1372 flow [2023-11-17 16:34:53,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1372, PETRI_PLACES=111, PETRI_TRANSITIONS=119} [2023-11-17 16:34:53,647 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 90 predicate places. [2023-11-17 16:34:53,647 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 119 transitions, 1372 flow [2023-11-17 16:34:53,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 84.04166666666667) internal successors, (2017), 24 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:53,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:53,648 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:53,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:53,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:53,855 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:53,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:53,855 INFO L85 PathProgramCache]: Analyzing trace with hash -622128216, now seen corresponding path program 8 times [2023-11-17 16:34:53,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:53,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573957816] [2023-11-17 16:34:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:53,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:54,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:54,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573957816] [2023-11-17 16:34:54,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573957816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:54,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912794165] [2023-11-17 16:34:54,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:34:54,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:54,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:54,292 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:54,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 16:34:54,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:34:54,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:54,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:34:54,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:34:54,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:54,661 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:34:54,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-11-17 16:34:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:34:54,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912794165] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:54,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:54,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 24 [2023-11-17 16:34:54,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914592144] [2023-11-17 16:34:54,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:54,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:34:54,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:54,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:34:54,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:34:54,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 231 [2023-11-17 16:34:54,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 119 transitions, 1372 flow. Second operand has 26 states, 26 states have (on average 84.03846153846153) internal successors, (2185), 26 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:54,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:54,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 231 [2023-11-17 16:34:54,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:34:56,350 INFO L124 PetriNetUnfolderBase]: 1548/2878 cut-off events. [2023-11-17 16:34:56,351 INFO L125 PetriNetUnfolderBase]: For 8364/8364 co-relation queries the response was YES. [2023-11-17 16:34:56,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10222 conditions, 2878 events. 1548/2878 cut-off events. For 8364/8364 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18513 event pairs, 73 based on Foata normal form. 10/2888 useless extension candidates. Maximal degree in co-relation 10162. Up to 594 conditions per place. [2023-11-17 16:34:56,366 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 113 selfloop transitions, 131 changer transitions 100/346 dead transitions. [2023-11-17 16:34:56,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 346 transitions, 2907 flow [2023-11-17 16:34:56,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 16:34:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 16:34:56,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3136 transitions. [2023-11-17 16:34:56,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2023-11-17 16:34:56,375 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3136 transitions. [2023-11-17 16:34:56,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3136 transitions. [2023-11-17 16:34:56,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:34:56,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3136 transitions. [2023-11-17 16:34:56,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 89.6) internal successors, (3136), 35 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:56,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 231.0) internal successors, (8316), 36 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:56,408 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 231.0) internal successors, (8316), 36 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:56,408 INFO L175 Difference]: Start difference. First operand has 111 places, 119 transitions, 1372 flow. Second operand 35 states and 3136 transitions. [2023-11-17 16:34:56,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 346 transitions, 2907 flow [2023-11-17 16:34:56,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 346 transitions, 2545 flow, removed 57 selfloop flow, removed 17 redundant places. [2023-11-17 16:34:56,455 INFO L231 Difference]: Finished difference. Result has 135 places, 148 transitions, 1786 flow [2023-11-17 16:34:56,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1786, PETRI_PLACES=135, PETRI_TRANSITIONS=148} [2023-11-17 16:34:56,456 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-11-17 16:34:56,456 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 148 transitions, 1786 flow [2023-11-17 16:34:56,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 84.03846153846153) internal successors, (2185), 26 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:56,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:34:56,457 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:34:56,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 16:34:56,663 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,SelfDestructingSolverStorable10 [2023-11-17 16:34:56,664 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:34:56,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:34:56,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1082637648, now seen corresponding path program 9 times [2023-11-17 16:34:56,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:34:56,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024787398] [2023-11-17 16:34:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:34:56,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:34:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:34:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:34:57,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:34:57,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024787398] [2023-11-17 16:34:57,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024787398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:34:57,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166404385] [2023-11-17 16:34:57,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:34:57,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:34:57,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:34:57,166 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:34:57,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 16:34:57,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:34:57,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:34:57,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 16:34:57,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:34:57,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-17 16:34:57,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:34:57,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:34:57,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-11-17 16:34:58,212 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-17 16:34:58,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-17 16:34:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:34:58,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:34:59,038 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:34:59,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-11-17 16:34:59,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:34:59,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 97 [2023-11-17 16:34:59,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2023-11-17 16:34:59,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:34:59,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 49 [2023-11-17 16:34:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:34:59,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166404385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:34:59,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:34:59,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2023-11-17 16:34:59,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573158753] [2023-11-17 16:34:59,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:34:59,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:34:59,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:34:59,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:34:59,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:34:59,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 231 [2023-11-17 16:34:59,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 148 transitions, 1786 flow. Second operand has 32 states, 32 states have (on average 68.71875) internal successors, (2199), 32 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:34:59,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:34:59,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 231 [2023-11-17 16:34:59,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:01,646 INFO L124 PetriNetUnfolderBase]: 2253/4285 cut-off events. [2023-11-17 16:35:01,646 INFO L125 PetriNetUnfolderBase]: For 12631/12631 co-relation queries the response was YES. [2023-11-17 16:35:01,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15098 conditions, 4285 events. 2253/4285 cut-off events. For 12631/12631 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 30468 event pairs, 213 based on Foata normal form. 83/4368 useless extension candidates. Maximal degree in co-relation 14346. Up to 900 conditions per place. [2023-11-17 16:35:01,680 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 42 selfloop transitions, 132 changer transitions 160/336 dead transitions. [2023-11-17 16:35:01,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 336 transitions, 3535 flow [2023-11-17 16:35:01,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 16:35:01,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 16:35:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1854 transitions. [2023-11-17 16:35:01,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.321038961038961 [2023-11-17 16:35:01,684 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1854 transitions. [2023-11-17 16:35:01,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1854 transitions. [2023-11-17 16:35:01,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:01,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1854 transitions. [2023-11-17 16:35:01,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 74.16) internal successors, (1854), 25 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:01,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 231.0) internal successors, (6006), 26 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:01,694 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 231.0) internal successors, (6006), 26 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:01,694 INFO L175 Difference]: Start difference. First operand has 135 places, 148 transitions, 1786 flow. Second operand 25 states and 1854 transitions. [2023-11-17 16:35:01,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 336 transitions, 3535 flow [2023-11-17 16:35:01,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 336 transitions, 3268 flow, removed 54 selfloop flow, removed 18 redundant places. [2023-11-17 16:35:01,797 INFO L231 Difference]: Finished difference. Result has 145 places, 150 transitions, 1924 flow [2023-11-17 16:35:01,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1924, PETRI_PLACES=145, PETRI_TRANSITIONS=150} [2023-11-17 16:35:01,798 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 124 predicate places. [2023-11-17 16:35:01,799 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 150 transitions, 1924 flow [2023-11-17 16:35:01,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 68.71875) internal successors, (2199), 32 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:01,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:01,799 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:01,808 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 16:35:02,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:02,006 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:02,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:02,007 INFO L85 PathProgramCache]: Analyzing trace with hash 968569829, now seen corresponding path program 10 times [2023-11-17 16:35:02,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:02,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803409121] [2023-11-17 16:35:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:02,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:35:02,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:02,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803409121] [2023-11-17 16:35:02,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803409121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:02,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236014014] [2023-11-17 16:35:02,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:35:02,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:02,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:02,111 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 16:35:02,133 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 16:35:02,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:35:02,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:02,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:35:02,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:35:02,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:35:02,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236014014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:02,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:02,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2023-11-17 16:35:02,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468781962] [2023-11-17 16:35:02,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:02,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:35:02,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:02,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:35:02,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:35:02,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 231 [2023-11-17 16:35:02,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 150 transitions, 1924 flow. Second operand has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:02,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:02,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 231 [2023-11-17 16:35:02,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:02,875 INFO L124 PetriNetUnfolderBase]: 2772/5118 cut-off events. [2023-11-17 16:35:02,875 INFO L125 PetriNetUnfolderBase]: For 22905/22905 co-relation queries the response was YES. [2023-11-17 16:35:02,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20136 conditions, 5118 events. 2772/5118 cut-off events. For 22905/22905 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 36755 event pairs, 429 based on Foata normal form. 18/5136 useless extension candidates. Maximal degree in co-relation 20073. Up to 1479 conditions per place. [2023-11-17 16:35:02,897 INFO L140 encePairwiseOnDemand]: 228/231 looper letters, 97 selfloop transitions, 161 changer transitions 0/260 dead transitions. [2023-11-17 16:35:02,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 260 transitions, 3880 flow [2023-11-17 16:35:02,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:35:02,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:35:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 689 transitions. [2023-11-17 16:35:02,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4971139971139971 [2023-11-17 16:35:02,899 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 689 transitions. [2023-11-17 16:35:02,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 689 transitions. [2023-11-17 16:35:02,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:02,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 689 transitions. [2023-11-17 16:35:02,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 114.83333333333333) internal successors, (689), 6 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:02,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 231.0) internal successors, (1617), 7 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:02,902 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 231.0) internal successors, (1617), 7 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:02,902 INFO L175 Difference]: Start difference. First operand has 145 places, 150 transitions, 1924 flow. Second operand 6 states and 689 transitions. [2023-11-17 16:35:02,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 260 transitions, 3880 flow [2023-11-17 16:35:02,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 260 transitions, 3615 flow, removed 47 selfloop flow, removed 9 redundant places. [2023-11-17 16:35:02,981 INFO L231 Difference]: Finished difference. Result has 131 places, 227 transitions, 3355 flow [2023-11-17 16:35:02,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=1731, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3355, PETRI_PLACES=131, PETRI_TRANSITIONS=227} [2023-11-17 16:35:02,982 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 110 predicate places. [2023-11-17 16:35:02,982 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 227 transitions, 3355 flow [2023-11-17 16:35:02,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:02,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:02,983 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:02,989 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 16:35:03,188 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,SelfDestructingSolverStorable12 [2023-11-17 16:35:03,189 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:03,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:03,189 INFO L85 PathProgramCache]: Analyzing trace with hash -680258584, now seen corresponding path program 11 times [2023-11-17 16:35:03,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:03,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96906953] [2023-11-17 16:35:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:03,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:03,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:03,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96906953] [2023-11-17 16:35:03,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96906953] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:03,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778620727] [2023-11-17 16:35:03,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:35:03,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:03,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:03,631 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 16:35:03,651 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 16:35:03,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 16:35:03,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:03,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-17 16:35:03,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:03,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-17 16:35:03,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-17 16:35:03,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:35:03,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:35:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:04,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:04,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:04,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2023-11-17 16:35:04,795 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:35:04,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 160 treesize of output 142 [2023-11-17 16:35:04,803 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 16:35:04,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 105 [2023-11-17 16:35:04,813 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 16:35:04,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 67 [2023-11-17 16:35:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 4 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:35:04,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778620727] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:04,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:04,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 12] total 36 [2023-11-17 16:35:04,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163155430] [2023-11-17 16:35:04,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:04,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 16:35:04,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:04,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 16:35:04,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1101, Unknown=8, NotChecked=0, Total=1406 [2023-11-17 16:35:04,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 231 [2023-11-17 16:35:04,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 227 transitions, 3355 flow. Second operand has 38 states, 38 states have (on average 75.52631578947368) internal successors, (2870), 38 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:04,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:04,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 231 [2023-11-17 16:35:04,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:10,979 INFO L124 PetriNetUnfolderBase]: 4904/9015 cut-off events. [2023-11-17 16:35:10,979 INFO L125 PetriNetUnfolderBase]: For 41384/41384 co-relation queries the response was YES. [2023-11-17 16:35:11,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36681 conditions, 9015 events. 4904/9015 cut-off events. For 41384/41384 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 70788 event pairs, 325 based on Foata normal form. 14/9029 useless extension candidates. Maximal degree in co-relation 36625. Up to 2426 conditions per place. [2023-11-17 16:35:11,035 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 277 selfloop transitions, 385 changer transitions 250/914 dead transitions. [2023-11-17 16:35:11,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 914 transitions, 9397 flow [2023-11-17 16:35:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-11-17 16:35:11,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-11-17 16:35:11,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6966 transitions. [2023-11-17 16:35:11,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3547746371275783 [2023-11-17 16:35:11,045 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6966 transitions. [2023-11-17 16:35:11,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6966 transitions. [2023-11-17 16:35:11,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:11,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6966 transitions. [2023-11-17 16:35:11,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 81.95294117647059) internal successors, (6966), 85 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:11,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 231.0) internal successors, (19866), 86 states have internal predecessors, (19866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:11,084 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 231.0) internal successors, (19866), 86 states have internal predecessors, (19866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:11,084 INFO L175 Difference]: Start difference. First operand has 131 places, 227 transitions, 3355 flow. Second operand 85 states and 6966 transitions. [2023-11-17 16:35:11,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 914 transitions, 9397 flow [2023-11-17 16:35:11,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 914 transitions, 9065 flow, removed 166 selfloop flow, removed 1 redundant places. [2023-11-17 16:35:11,362 INFO L231 Difference]: Finished difference. Result has 231 places, 403 transitions, 6836 flow [2023-11-17 16:35:11,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=6836, PETRI_PLACES=231, PETRI_TRANSITIONS=403} [2023-11-17 16:35:11,363 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 210 predicate places. [2023-11-17 16:35:11,363 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 403 transitions, 6836 flow [2023-11-17 16:35:11,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 75.52631578947368) internal successors, (2870), 38 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:11,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:11,364 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:11,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-17 16:35:11,570 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,SelfDestructingSolverStorable13 [2023-11-17 16:35:11,570 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:11,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:11,570 INFO L85 PathProgramCache]: Analyzing trace with hash 341587782, now seen corresponding path program 12 times [2023-11-17 16:35:11,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:11,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26965592] [2023-11-17 16:35:11,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:11,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:12,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:12,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26965592] [2023-11-17 16:35:12,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26965592] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:12,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505798143] [2023-11-17 16:35:12,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:35:12,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:12,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:12,072 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:12,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 16:35:12,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:35:12,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:12,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 16:35:12,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:12,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:12,663 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:35:12,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-11-17 16:35:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:35:12,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505798143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:12,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:12,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 33 [2023-11-17 16:35:12,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630344085] [2023-11-17 16:35:12,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:12,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:35:12,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:12,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:35:12,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 16:35:12,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 231 [2023-11-17 16:35:12,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 403 transitions, 6836 flow. Second operand has 35 states, 35 states have (on average 83.77142857142857) internal successors, (2932), 35 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:12,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:12,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 231 [2023-11-17 16:35:12,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:16,007 INFO L124 PetriNetUnfolderBase]: 4984/9150 cut-off events. [2023-11-17 16:35:16,007 INFO L125 PetriNetUnfolderBase]: For 69681/69681 co-relation queries the response was YES. [2023-11-17 16:35:16,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41421 conditions, 9150 events. 4984/9150 cut-off events. For 69681/69681 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 71616 event pairs, 435 based on Foata normal form. 11/9161 useless extension candidates. Maximal degree in co-relation 41343. Up to 1975 conditions per place. [2023-11-17 16:35:16,077 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 188 selfloop transitions, 392 changer transitions 163/745 dead transitions. [2023-11-17 16:35:16,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 745 transitions, 9745 flow [2023-11-17 16:35:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-17 16:35:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-11-17 16:35:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4846 transitions. [2023-11-17 16:35:16,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38848805515472185 [2023-11-17 16:35:16,083 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4846 transitions. [2023-11-17 16:35:16,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4846 transitions. [2023-11-17 16:35:16,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:16,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4846 transitions. [2023-11-17 16:35:16,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 89.74074074074075) internal successors, (4846), 54 states have internal predecessors, (4846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:16,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 231.0) internal successors, (12705), 55 states have internal predecessors, (12705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:16,116 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 231.0) internal successors, (12705), 55 states have internal predecessors, (12705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:16,117 INFO L175 Difference]: Start difference. First operand has 231 places, 403 transitions, 6836 flow. Second operand 54 states and 4846 transitions. [2023-11-17 16:35:16,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 745 transitions, 9745 flow [2023-11-17 16:35:16,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 745 transitions, 8556 flow, removed 264 selfloop flow, removed 30 redundant places. [2023-11-17 16:35:16,557 INFO L231 Difference]: Finished difference. Result has 262 places, 416 transitions, 7130 flow [2023-11-17 16:35:16,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=5733, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=7130, PETRI_PLACES=262, PETRI_TRANSITIONS=416} [2023-11-17 16:35:16,558 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 241 predicate places. [2023-11-17 16:35:16,558 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 416 transitions, 7130 flow [2023-11-17 16:35:16,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 83.77142857142857) internal successors, (2932), 35 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:16,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:16,559 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:16,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-17 16:35:16,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 16:35:16,760 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:16,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:16,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1623803428, now seen corresponding path program 13 times [2023-11-17 16:35:16,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:16,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452858148] [2023-11-17 16:35:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:16,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:17,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:17,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452858148] [2023-11-17 16:35:17,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452858148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:17,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378540682] [2023-11-17 16:35:17,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:35:17,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:17,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:17,318 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:17,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 16:35:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:17,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 16:35:17,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:17,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:35:17,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-17 16:35:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:35:17,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:17,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:17,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-11-17 16:35:17,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-11-17 16:35:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:35:18,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378540682] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:18,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:18,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-11-17 16:35:18,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165377675] [2023-11-17 16:35:18,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:18,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 16:35:18,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:18,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 16:35:18,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1224, Unknown=3, NotChecked=0, Total=1332 [2023-11-17 16:35:18,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 231 [2023-11-17 16:35:18,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 416 transitions, 7130 flow. Second operand has 37 states, 37 states have (on average 78.62162162162163) internal successors, (2909), 37 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:18,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:18,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 231 [2023-11-17 16:35:18,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:21,242 INFO L124 PetriNetUnfolderBase]: 5000/9179 cut-off events. [2023-11-17 16:35:21,243 INFO L125 PetriNetUnfolderBase]: For 75397/75397 co-relation queries the response was YES. [2023-11-17 16:35:21,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41660 conditions, 9179 events. 5000/9179 cut-off events. For 75397/75397 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 71859 event pairs, 449 based on Foata normal form. 1/9180 useless extension candidates. Maximal degree in co-relation 41576. Up to 1902 conditions per place. [2023-11-17 16:35:21,299 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 86 selfloop transitions, 392 changer transitions 58/538 dead transitions. [2023-11-17 16:35:21,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 538 transitions, 8683 flow [2023-11-17 16:35:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:35:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:35:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2010 transitions. [2023-11-17 16:35:21,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3625541125541126 [2023-11-17 16:35:21,302 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2010 transitions. [2023-11-17 16:35:21,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2010 transitions. [2023-11-17 16:35:21,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:21,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2010 transitions. [2023-11-17 16:35:21,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:21,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 231.0) internal successors, (5775), 25 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:21,311 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 231.0) internal successors, (5775), 25 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:21,311 INFO L175 Difference]: Start difference. First operand has 262 places, 416 transitions, 7130 flow. Second operand 24 states and 2010 transitions. [2023-11-17 16:35:21,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 538 transitions, 8683 flow [2023-11-17 16:35:21,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 538 transitions, 8207 flow, removed 21 selfloop flow, removed 40 redundant places. [2023-11-17 16:35:21,911 INFO L231 Difference]: Finished difference. Result has 246 places, 417 transitions, 7478 flow [2023-11-17 16:35:21,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=6654, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7478, PETRI_PLACES=246, PETRI_TRANSITIONS=417} [2023-11-17 16:35:21,912 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2023-11-17 16:35:21,913 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 417 transitions, 7478 flow [2023-11-17 16:35:21,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 78.62162162162163) internal successors, (2909), 37 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:21,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:21,914 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:21,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:22,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 16:35:22,139 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:22,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:22,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1097233684, now seen corresponding path program 14 times [2023-11-17 16:35:22,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:22,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626709455] [2023-11-17 16:35:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:22,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:35:22,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:22,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626709455] [2023-11-17 16:35:22,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626709455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:22,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33172637] [2023-11-17 16:35:22,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:35:22,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:22,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:22,478 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:22,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 16:35:22,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:35:22,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:22,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:35:22,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:35:22,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:35:22,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33172637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:22,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:22,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 16 [2023-11-17 16:35:22,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516828194] [2023-11-17 16:35:22,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:22,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:35:22,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:22,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:35:22,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:35:22,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 231 [2023-11-17 16:35:22,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 417 transitions, 7478 flow. Second operand has 17 states, 17 states have (on average 90.41176470588235) internal successors, (1537), 17 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:22,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:22,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 231 [2023-11-17 16:35:22,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:27,527 INFO L124 PetriNetUnfolderBase]: 13421/25171 cut-off events. [2023-11-17 16:35:27,527 INFO L125 PetriNetUnfolderBase]: For 229365/229365 co-relation queries the response was YES. [2023-11-17 16:35:27,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114665 conditions, 25171 events. 13421/25171 cut-off events. For 229365/229365 co-relation queries the response was YES. Maximal size of possible extension queue 1579. Compared 237171 event pairs, 2133 based on Foata normal form. 750/25921 useless extension candidates. Maximal degree in co-relation 112258. Up to 5364 conditions per place. [2023-11-17 16:35:27,741 INFO L140 encePairwiseOnDemand]: 226/231 looper letters, 207 selfloop transitions, 460 changer transitions 474/1143 dead transitions. [2023-11-17 16:35:27,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 1143 transitions, 21248 flow [2023-11-17 16:35:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 16:35:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 16:35:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2579 transitions. [2023-11-17 16:35:27,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41350008016674683 [2023-11-17 16:35:27,748 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2579 transitions. [2023-11-17 16:35:27,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2579 transitions. [2023-11-17 16:35:27,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:27,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2579 transitions. [2023-11-17 16:35:27,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 95.51851851851852) internal successors, (2579), 27 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:27,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 231.0) internal successors, (6468), 28 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:27,759 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 231.0) internal successors, (6468), 28 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:27,759 INFO L175 Difference]: Start difference. First operand has 246 places, 417 transitions, 7478 flow. Second operand 27 states and 2579 transitions. [2023-11-17 16:35:27,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 1143 transitions, 21248 flow [2023-11-17 16:35:29,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 1143 transitions, 18981 flow, removed 35 selfloop flow, removed 22 redundant places. [2023-11-17 16:35:29,241 INFO L231 Difference]: Finished difference. Result has 259 places, 628 transitions, 12548 flow [2023-11-17 16:35:29,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=6510, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12548, PETRI_PLACES=259, PETRI_TRANSITIONS=628} [2023-11-17 16:35:29,242 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 238 predicate places. [2023-11-17 16:35:29,242 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 628 transitions, 12548 flow [2023-11-17 16:35:29,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 90.41176470588235) internal successors, (1537), 17 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:29,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:29,243 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:29,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:29,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:29,452 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:29,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:29,452 INFO L85 PathProgramCache]: Analyzing trace with hash -179383950, now seen corresponding path program 15 times [2023-11-17 16:35:29,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:29,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805718617] [2023-11-17 16:35:29,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:29,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:30,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:30,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805718617] [2023-11-17 16:35:30,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805718617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:30,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292960028] [2023-11-17 16:35:30,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:35:30,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:30,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:30,071 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:30,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 16:35:30,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 16:35:30,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:30,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 16:35:30,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:30,972 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-17 16:35:30,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-17 16:35:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:35:30,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:31,158 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-17 16:35:31,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2023-11-17 16:35:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:35:31,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292960028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:31,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:31,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 41 [2023-11-17 16:35:31,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167787553] [2023-11-17 16:35:31,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:31,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 16:35:31,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:31,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 16:35:31,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1547, Unknown=0, NotChecked=0, Total=1806 [2023-11-17 16:35:31,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 231 [2023-11-17 16:35:31,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 628 transitions, 12548 flow. Second operand has 43 states, 43 states have (on average 76.4186046511628) internal successors, (3286), 43 states have internal predecessors, (3286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:31,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:31,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 231 [2023-11-17 16:35:31,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:50,012 INFO L124 PetriNetUnfolderBase]: 28405/51961 cut-off events. [2023-11-17 16:35:50,012 INFO L125 PetriNetUnfolderBase]: For 497568/497568 co-relation queries the response was YES. [2023-11-17 16:35:50,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265966 conditions, 51961 events. 28405/51961 cut-off events. For 497568/497568 co-relation queries the response was YES. Maximal size of possible extension queue 3122. Compared 521645 event pairs, 4943 based on Foata normal form. 90/52051 useless extension candidates. Maximal degree in co-relation 254723. Up to 10794 conditions per place. [2023-11-17 16:35:50,536 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 891 selfloop transitions, 841 changer transitions 1757/3491 dead transitions. [2023-11-17 16:35:50,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 3491 transitions, 57759 flow [2023-11-17 16:35:50,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2023-11-17 16:35:50,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2023-11-17 16:35:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 15123 transitions. [2023-11-17 16:35:50,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359711716854574 [2023-11-17 16:35:50,553 INFO L72 ComplementDD]: Start complementDD. Operand 182 states and 15123 transitions. [2023-11-17 16:35:50,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 182 states and 15123 transitions. [2023-11-17 16:35:50,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:50,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 182 states and 15123 transitions. [2023-11-17 16:35:50,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 183 states, 182 states have (on average 83.0934065934066) internal successors, (15123), 182 states have internal predecessors, (15123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:50,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 183 states, 183 states have (on average 231.0) internal successors, (42273), 183 states have internal predecessors, (42273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:50,613 INFO L81 ComplementDD]: Finished complementDD. Result has 183 states, 183 states have (on average 231.0) internal successors, (42273), 183 states have internal predecessors, (42273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:50,614 INFO L175 Difference]: Start difference. First operand has 259 places, 628 transitions, 12548 flow. Second operand 182 states and 15123 transitions. [2023-11-17 16:35:50,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 3491 transitions, 57759 flow [2023-11-17 16:35:58,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 3491 transitions, 54213 flow, removed 1769 selfloop flow, removed 9 redundant places. [2023-11-17 16:35:58,697 INFO L231 Difference]: Finished difference. Result has 523 places, 1230 transitions, 26498 flow [2023-11-17 16:35:58,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=11816, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=182, PETRI_FLOW=26498, PETRI_PLACES=523, PETRI_TRANSITIONS=1230} [2023-11-17 16:35:58,698 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 502 predicate places. [2023-11-17 16:35:58,698 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 1230 transitions, 26498 flow [2023-11-17 16:35:58,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 76.4186046511628) internal successors, (3286), 43 states have internal predecessors, (3286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:58,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:58,699 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:58,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:58,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 16:35:58,900 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:58,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:58,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1958581440, now seen corresponding path program 16 times [2023-11-17 16:35:58,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:58,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330738888] [2023-11-17 16:35:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:58,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:59,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:59,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330738888] [2023-11-17 16:35:59,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330738888] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:59,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050963166] [2023-11-17 16:35:59,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:35:59,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:59,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:59,442 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:35:59,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 16:35:59,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:35:59,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:59,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 16:35:59,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:59,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:36:00,001 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:36:00,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-11-17 16:36:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 16:36:00,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050963166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:36:00,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:36:00,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 11] total 37 [2023-11-17 16:36:00,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754402450] [2023-11-17 16:36:00,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:36:00,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 16:36:00,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:36:00,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 16:36:00,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2023-11-17 16:36:00,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 231 [2023-11-17 16:36:00,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 1230 transitions, 26498 flow. Second operand has 39 states, 39 states have (on average 83.71794871794872) internal successors, (3265), 39 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:00,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:36:00,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 231 [2023-11-17 16:36:00,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:36:21,543 INFO L124 PetriNetUnfolderBase]: 23915/43953 cut-off events. [2023-11-17 16:36:21,543 INFO L125 PetriNetUnfolderBase]: For 905437/905437 co-relation queries the response was YES. [2023-11-17 16:36:22,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264342 conditions, 43953 events. 23915/43953 cut-off events. For 905437/905437 co-relation queries the response was YES. Maximal size of possible extension queue 2645. Compared 430236 event pairs, 1975 based on Foata normal form. 77/44030 useless extension candidates. Maximal degree in co-relation 264037. Up to 9180 conditions per place. [2023-11-17 16:36:22,687 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 380 selfloop transitions, 1571 changer transitions 542/2495 dead transitions. [2023-11-17 16:36:22,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 2495 transitions, 49130 flow [2023-11-17 16:36:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-17 16:36:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2023-11-17 16:36:22,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 9088 transitions. [2023-11-17 16:36:22,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3895246667523895 [2023-11-17 16:36:22,698 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 9088 transitions. [2023-11-17 16:36:22,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 9088 transitions. [2023-11-17 16:36:22,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:36:22,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 9088 transitions. [2023-11-17 16:36:22,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 89.98019801980197) internal successors, (9088), 101 states have internal predecessors, (9088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:22,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 231.0) internal successors, (23562), 102 states have internal predecessors, (23562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:22,732 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 231.0) internal successors, (23562), 102 states have internal predecessors, (23562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:22,733 INFO L175 Difference]: Start difference. First operand has 523 places, 1230 transitions, 26498 flow. Second operand 101 states and 9088 transitions. [2023-11-17 16:36:22,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 2495 transitions, 49130 flow [2023-11-17 16:36:40,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 2495 transitions, 45702 flow, removed 1594 selfloop flow, removed 35 redundant places. [2023-11-17 16:36:40,633 INFO L231 Difference]: Finished difference. Result has 592 places, 1619 transitions, 38792 flow [2023-11-17 16:36:40,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=24549, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=38792, PETRI_PLACES=592, PETRI_TRANSITIONS=1619} [2023-11-17 16:36:40,634 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 571 predicate places. [2023-11-17 16:36:40,635 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 1619 transitions, 38792 flow [2023-11-17 16:36:40,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 83.71794871794872) internal successors, (3265), 39 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:40,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:36:40,635 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:36:40,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 16:36:40,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:40,836 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:36:40,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:36:40,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1880124976, now seen corresponding path program 17 times [2023-11-17 16:36:40,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:36:40,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839675481] [2023-11-17 16:36:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:36:40,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:36:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:36:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:36:41,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:36:41,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839675481] [2023-11-17 16:36:41,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839675481] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:36:41,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860978454] [2023-11-17 16:36:41,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:36:41,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:41,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:36:41,479 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:36:41,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 16:36:41,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 16:36:41,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:36:41,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 16:36:41,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:36:42,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:36:42,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-11-17 16:36:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:36:42,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:36:42,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:36:42,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-11-17 16:36:42,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-11-17 16:36:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 16:36:42,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860978454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:36:42,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:36:42,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 13] total 46 [2023-11-17 16:36:42,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166964268] [2023-11-17 16:36:42,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:36:42,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-17 16:36:42,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:36:42,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-17 16:36:42,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2116, Unknown=0, NotChecked=0, Total=2256 [2023-11-17 16:36:42,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 231 [2023-11-17 16:36:42,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 1619 transitions, 38792 flow. Second operand has 48 states, 48 states have (on average 75.47916666666667) internal successors, (3623), 48 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:42,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:36:42,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 231 [2023-11-17 16:36:42,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:37:05,325 INFO L124 PetriNetUnfolderBase]: 21165/38938 cut-off events. [2023-11-17 16:37:05,326 INFO L125 PetriNetUnfolderBase]: For 825489/825489 co-relation queries the response was YES. [2023-11-17 16:37:06,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240513 conditions, 38938 events. 21165/38938 cut-off events. For 825489/825489 co-relation queries the response was YES. Maximal size of possible extension queue 2352. Compared 374818 event pairs, 1765 based on Foata normal form. 5/38943 useless extension candidates. Maximal degree in co-relation 240315. Up to 8136 conditions per place. [2023-11-17 16:37:06,341 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 128 selfloop transitions, 1574 changer transitions 77/1781 dead transitions. [2023-11-17 16:37:06,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1781 transitions, 43334 flow [2023-11-17 16:37:06,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:37:06,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:37:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2343 transitions. [2023-11-17 16:37:06,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3497536945812808 [2023-11-17 16:37:06,343 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2343 transitions. [2023-11-17 16:37:06,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2343 transitions. [2023-11-17 16:37:06,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:37:06,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2343 transitions. [2023-11-17 16:37:06,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 80.79310344827586) internal successors, (2343), 29 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:06,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 231.0) internal successors, (6930), 30 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:06,352 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 231.0) internal successors, (6930), 30 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:06,352 INFO L175 Difference]: Start difference. First operand has 592 places, 1619 transitions, 38792 flow. Second operand 29 states and 2343 transitions. [2023-11-17 16:37:06,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1781 transitions, 43334 flow [2023-11-17 16:37:22,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 1781 transitions, 38583 flow, removed 789 selfloop flow, removed 56 redundant places. [2023-11-17 16:37:22,042 INFO L231 Difference]: Finished difference. Result has 559 places, 1617 transitions, 37230 flow [2023-11-17 16:37:22,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=34055, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1573, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=37230, PETRI_PLACES=559, PETRI_TRANSITIONS=1617} [2023-11-17 16:37:22,044 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 538 predicate places. [2023-11-17 16:37:22,044 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 1617 transitions, 37230 flow [2023-11-17 16:37:22,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 75.47916666666667) internal successors, (3623), 48 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:22,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:37:22,045 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:37:22,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 16:37:22,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:37:22,250 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:37:22,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:37:22,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1296615923, now seen corresponding path program 18 times [2023-11-17 16:37:22,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:37:22,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244235156] [2023-11-17 16:37:22,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:37:22,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:37:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:37:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-17 16:37:22,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:37:22,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244235156] [2023-11-17 16:37:22,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244235156] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:37:22,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611736025] [2023-11-17 16:37:22,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:37:22,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:37:22,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:37:22,395 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:37:22,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 16:37:22,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 16:37:22,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:37:22,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:37:22,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:37:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-17 16:37:22,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:37:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-17 16:37:22,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611736025] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:37:22,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:37:22,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2023-11-17 16:37:22,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443809326] [2023-11-17 16:37:22,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:37:22,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 16:37:22,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:37:22,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 16:37:22,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-17 16:37:22,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 231 [2023-11-17 16:37:22,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 1617 transitions, 37230 flow. Second operand has 9 states, 9 states have (on average 108.55555555555556) internal successors, (977), 9 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:22,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:37:22,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 231 [2023-11-17 16:37:22,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:37:51,821 INFO L124 PetriNetUnfolderBase]: 34567/63456 cut-off events. [2023-11-17 16:37:51,821 INFO L125 PetriNetUnfolderBase]: For 1146078/1146078 co-relation queries the response was YES. [2023-11-17 16:37:53,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385553 conditions, 63456 events. 34567/63456 cut-off events. For 1146078/1146078 co-relation queries the response was YES. Maximal size of possible extension queue 3699. Compared 652286 event pairs, 4883 based on Foata normal form. 48/63504 useless extension candidates. Maximal degree in co-relation 385380. Up to 18340 conditions per place. [2023-11-17 16:37:53,343 INFO L140 encePairwiseOnDemand]: 228/231 looper letters, 665 selfloop transitions, 1862 changer transitions 0/2529 dead transitions. [2023-11-17 16:37:53,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 2529 transitions, 64887 flow [2023-11-17 16:37:53,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:37:53,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:37:53,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 921 transitions. [2023-11-17 16:37:53,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49837662337662336 [2023-11-17 16:37:53,345 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 921 transitions. [2023-11-17 16:37:53,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 921 transitions. [2023-11-17 16:37:53,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:37:53,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 921 transitions. [2023-11-17 16:37:53,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.125) internal successors, (921), 8 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:53,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 231.0) internal successors, (2079), 9 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:53,348 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 231.0) internal successors, (2079), 9 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:53,348 INFO L175 Difference]: Start difference. First operand has 559 places, 1617 transitions, 37230 flow. Second operand 8 states and 921 transitions. [2023-11-17 16:37:53,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 2529 transitions, 64887 flow [2023-11-17 16:38:08,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 2529 transitions, 60229 flow, removed 103 selfloop flow, removed 27 redundant places. [2023-11-17 16:38:08,110 INFO L231 Difference]: Finished difference. Result has 545 places, 2479 transitions, 62868 flow [2023-11-17 16:38:08,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=34107, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=62868, PETRI_PLACES=545, PETRI_TRANSITIONS=2479} [2023-11-17 16:38:08,112 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 524 predicate places. [2023-11-17 16:38:08,113 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 2479 transitions, 62868 flow [2023-11-17 16:38:08,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 108.55555555555556) internal successors, (977), 9 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:08,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:38:08,113 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:38:08,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 16:38:08,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:38:08,319 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:38:08,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:38:08,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1373696937, now seen corresponding path program 19 times [2023-11-17 16:38:08,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:38:08,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522189043] [2023-11-17 16:38:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:38:08,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:38:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:38:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:38:08,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:38:08,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522189043] [2023-11-17 16:38:08,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522189043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:38:08,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129246441] [2023-11-17 16:38:08,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:38:08,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:38:08,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:38:08,591 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:38:08,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 16:38:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:38:08,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 16:38:08,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:38:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:38:09,129 INFO L327 TraceCheckSpWp]: Computing backward predicates...