/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/unroll-cond-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:38:31,488 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:38:31,567 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 16:38:31,611 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:38:31,612 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:38:31,612 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:38:31,613 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:38:31,613 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:38:31,613 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:38:31,617 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:38:31,618 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:38:31,618 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:38:31,618 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:38:31,619 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:38:31,620 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:38:31,620 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:38:31,620 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:38:31,620 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:38:31,620 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:38:31,621 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:38:31,621 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:38:31,622 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:38:31,622 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:38:31,622 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:38:31,622 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:38:31,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:38:31,624 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:38:31,624 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:38:31,624 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:38:31,624 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:38:31,625 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:38:31,625 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:38:31,626 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:38:31,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:38:31,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:38:31,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:38:31,881 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:38:31,881 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:38:31,882 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2023-11-17 16:38:33,083 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:38:33,295 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:38:33,296 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2023-11-17 16:38:33,304 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aeac7804/a54deec932a54ca3b038f478abeeadfa/FLAG6128e3d13 [2023-11-17 16:38:33,321 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aeac7804/a54deec932a54ca3b038f478abeeadfa [2023-11-17 16:38:33,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:38:33,324 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:38:33,327 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:38:33,327 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:38:33,331 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:38:33,332 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:38:33" (1/1) ... [2023-11-17 16:38:33,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c6fbe33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:33, skipping insertion in model container [2023-11-17 16:38:33,334 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:38:33" (1/1) ... [2023-11-17 16:38:33,362 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:38:33,504 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/unroll-cond-3.wvr.c[2667,2680] [2023-11-17 16:38:33,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:38:33,519 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:38:33,538 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/unroll-cond-3.wvr.c[2667,2680] [2023-11-17 16:38:33,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:38:33,556 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:38:33,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:33 WrapperNode [2023-11-17 16:38:33,556 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:38:33,557 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:38:33,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:38:33,558 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:38:33,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:33" (1/1) ... [2023-11-17 16:38:33,576 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:33" (1/1) ... [2023-11-17 16:38:33,597 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 167 [2023-11-17 16:38:33,598 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:38:33,598 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:38:33,598 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:38:33,599 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:38:33,607 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:33" (1/1) ... [2023-11-17 16:38:33,608 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:33" (1/1) ... [2023-11-17 16:38:33,610 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:33" (1/1) ... [2023-11-17 16:38:33,611 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:33" (1/1) ... [2023-11-17 16:38:33,617 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:33" (1/1) ... [2023-11-17 16:38:33,620 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:33" (1/1) ... [2023-11-17 16:38:33,622 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:33" (1/1) ... [2023-11-17 16:38:33,623 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:33" (1/1) ... [2023-11-17 16:38:33,626 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:38:33,626 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:38:33,627 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:38:33,627 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:38:33,627 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:33" (1/1) ... [2023-11-17 16:38:33,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:38:33,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:38:33,660 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 16:38:33,666 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 16:38:33,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:38:33,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:38:33,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:38:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:38:33,696 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:38:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:38:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:38:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:38:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:38:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:38:33,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:38:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:38:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:38:33,698 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 16:38:33,787 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:38:33,789 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:38:34,061 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:38:34,074 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:38:34,074 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 16:38:34,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:38:34 BoogieIcfgContainer [2023-11-17 16:38:34,076 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:38:34,078 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:38:34,078 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:38:34,081 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:38:34,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:38:33" (1/3) ... [2023-11-17 16:38:34,082 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfbd189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:38:34, skipping insertion in model container [2023-11-17 16:38:34,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:38:33" (2/3) ... [2023-11-17 16:38:34,082 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfbd189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:38:34, skipping insertion in model container [2023-11-17 16:38:34,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:38:34" (3/3) ... [2023-11-17 16:38:34,084 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2023-11-17 16:38:34,099 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:38:34,100 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:38:34,100 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:38:34,229 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:38:34,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 211 transitions, 436 flow [2023-11-17 16:38:34,358 INFO L124 PetriNetUnfolderBase]: 18/209 cut-off events. [2023-11-17 16:38:34,358 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:38:34,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 209 events. 18/209 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 320 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2023-11-17 16:38:34,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 211 transitions, 436 flow [2023-11-17 16:38:34,369 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 200 transitions, 412 flow [2023-11-17 16:38:34,375 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:38:34,404 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 200 transitions, 412 flow [2023-11-17 16:38:34,407 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 200 transitions, 412 flow [2023-11-17 16:38:34,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 200 transitions, 412 flow [2023-11-17 16:38:34,469 INFO L124 PetriNetUnfolderBase]: 18/200 cut-off events. [2023-11-17 16:38:34,469 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:38:34,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 200 events. 18/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 299 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2023-11-17 16:38:34,474 INFO L119 LiptonReduction]: Number of co-enabled transitions 4752 [2023-11-17 16:38:40,031 INFO L134 LiptonReduction]: Checked pairs total: 4551 [2023-11-17 16:38:40,031 INFO L136 LiptonReduction]: Total number of compositions: 243 [2023-11-17 16:38:40,055 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:38:40,062 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;@203c2d93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:38:40,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 16:38:40,081 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:38:40,082 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-17 16:38:40,082 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:38:40,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:38:40,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:38:40,083 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 16:38:40,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:38:40,088 INFO L85 PathProgramCache]: Analyzing trace with hash -709592529, now seen corresponding path program 1 times [2023-11-17 16:38:40,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:38:40,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558368472] [2023-11-17 16:38:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:38:40,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:38:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:38:40,452 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 16:38:40,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:38:40,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558368472] [2023-11-17 16:38:40,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558368472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:38:40,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:38:40,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:38:40,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100747458] [2023-11-17 16:38:40,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:38:40,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:38:40,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:38:40,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:38:40,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:38:40,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 454 [2023-11-17 16:38:40,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:40,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:38:40,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 454 [2023-11-17 16:38:40,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:38:40,559 INFO L124 PetriNetUnfolderBase]: 41/76 cut-off events. [2023-11-17 16:38:40,559 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 16:38:40,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 76 events. 41/76 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 24 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-11-17 16:38:40,565 INFO L140 encePairwiseOnDemand]: 451/454 looper letters, 16 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-11-17 16:38:40,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 84 flow [2023-11-17 16:38:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:38:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:38:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-11-17 16:38:40,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4104258443465492 [2023-11-17 16:38:40,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-11-17 16:38:40,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-11-17 16:38:40,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:38:40,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-11-17 16:38:40,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:40,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 454.0) internal successors, (1816), 4 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:40,606 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 454.0) internal successors, (1816), 4 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:40,608 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 559 transitions. [2023-11-17 16:38:40,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 84 flow [2023-11-17 16:38:40,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:38:40,613 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-11-17 16:38:40,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, 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 16:38:40,618 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-17 16:38:40,619 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-11-17 16:38:40,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:40,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:38:40,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:38:40,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:38:40,621 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 16:38:40,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:38:40,621 INFO L85 PathProgramCache]: Analyzing trace with hash 117137606, now seen corresponding path program 1 times [2023-11-17 16:38:40,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:38:40,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724944482] [2023-11-17 16:38:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:38:40,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:38:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:38:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:38:41,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:38:41,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724944482] [2023-11-17 16:38:41,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724944482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:38:41,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:38:41,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:38:41,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34029211] [2023-11-17 16:38:41,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:38:41,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:38:41,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:38:41,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:38:41,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:38:41,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:38:41,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:41,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:38:41,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:38:41,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:38:41,272 INFO L124 PetriNetUnfolderBase]: 72/135 cut-off events. [2023-11-17 16:38:41,272 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:38:41,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 370 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2023-11-17 16:38:41,273 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-11-17 16:38:41,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-11-17 16:38:41,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:38:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:38:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 885 transitions. [2023-11-17 16:38:41,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898678414096916 [2023-11-17 16:38:41,277 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 885 transitions. [2023-11-17 16:38:41,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 885 transitions. [2023-11-17 16:38:41,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:38:41,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 885 transitions. [2023-11-17 16:38:41,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:41,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 454.0) internal successors, (2724), 6 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:41,285 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 454.0) internal successors, (2724), 6 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:41,286 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 885 transitions. [2023-11-17 16:38:41,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-11-17 16:38:41,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:38:41,288 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-11-17 16:38:41,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=46, 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=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-11-17 16:38:41,290 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-17 16:38:41,291 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-11-17 16:38:41,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:41,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:38:41,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:38:41,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:38:41,293 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 16:38:41,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:38:41,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1302635166, now seen corresponding path program 2 times [2023-11-17 16:38:41,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:38:41,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482190779] [2023-11-17 16:38:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:38:41,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:38:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:38:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:38:41,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:38:41,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482190779] [2023-11-17 16:38:41,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482190779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:38:41,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:38:41,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:38:41,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693084326] [2023-11-17 16:38:41,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:38:41,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:38:41,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:38:41,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:38:41,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:38:41,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 454 [2023-11-17 16:38:41,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 150.5) internal successors, (903), 6 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:41,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:38:41,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 454 [2023-11-17 16:38:41,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:38:41,750 INFO L124 PetriNetUnfolderBase]: 109/209 cut-off events. [2023-11-17 16:38:41,750 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2023-11-17 16:38:41,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 209 events. 109/209 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 685 event pairs, 4 based on Foata normal form. 1/169 useless extension candidates. Maximal degree in co-relation 582. Up to 87 conditions per place. [2023-11-17 16:38:41,752 INFO L140 encePairwiseOnDemand]: 446/454 looper letters, 43 selfloop transitions, 19 changer transitions 2/64 dead transitions. [2023-11-17 16:38:41,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 64 transitions, 353 flow [2023-11-17 16:38:41,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:38:41,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:38:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1244 transitions. [2023-11-17 16:38:41,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34251101321585903 [2023-11-17 16:38:41,756 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1244 transitions. [2023-11-17 16:38:41,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1244 transitions. [2023-11-17 16:38:41,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:38:41,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1244 transitions. [2023-11-17 16:38:41,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 155.5) internal successors, (1244), 8 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:41,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 454.0) internal successors, (4086), 9 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:41,767 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 454.0) internal successors, (4086), 9 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:41,767 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 8 states and 1244 transitions. [2023-11-17 16:38:41,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 64 transitions, 353 flow [2023-11-17 16:38:41,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 64 transitions, 335 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-17 16:38:41,770 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 197 flow [2023-11-17 16:38:41,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=197, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2023-11-17 16:38:41,770 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-11-17 16:38:41,771 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 197 flow [2023-11-17 16:38:41,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 150.5) internal successors, (903), 6 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:41,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:38:41,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:38:41,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:38:41,772 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 16:38:41,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:38:41,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1324303254, now seen corresponding path program 3 times [2023-11-17 16:38:41,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:38:41,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484546079] [2023-11-17 16:38:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:38:41,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:38:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:38:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:38:41,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:38:41,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484546079] [2023-11-17 16:38:41,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484546079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:38:41,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:38:41,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:38:41,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221097790] [2023-11-17 16:38:41,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:38:41,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:38:41,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:38:41,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:38:41,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:38:41,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:38:41,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:41,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:38:41,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:38:41,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:38:42,058 INFO L124 PetriNetUnfolderBase]: 118/219 cut-off events. [2023-11-17 16:38:42,058 INFO L125 PetriNetUnfolderBase]: For 295/295 co-relation queries the response was YES. [2023-11-17 16:38:42,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 219 events. 118/219 cut-off events. For 295/295 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 694 event pairs, 36 based on Foata normal form. 4/202 useless extension candidates. Maximal degree in co-relation 738. Up to 119 conditions per place. [2023-11-17 16:38:42,060 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 41 selfloop transitions, 16 changer transitions 0/57 dead transitions. [2023-11-17 16:38:42,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 389 flow [2023-11-17 16:38:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:38:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:38:42,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 886 transitions. [2023-11-17 16:38:42,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903083700440529 [2023-11-17 16:38:42,063 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 886 transitions. [2023-11-17 16:38:42,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 886 transitions. [2023-11-17 16:38:42,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:38:42,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 886 transitions. [2023-11-17 16:38:42,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.2) internal successors, (886), 5 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:42,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 454.0) internal successors, (2724), 6 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:42,070 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 454.0) internal successors, (2724), 6 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:42,070 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 197 flow. Second operand 5 states and 886 transitions. [2023-11-17 16:38:42,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 389 flow [2023-11-17 16:38:42,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 353 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-11-17 16:38:42,073 INFO L231 Difference]: Finished difference. Result has 40 places, 42 transitions, 249 flow [2023-11-17 16:38:42,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=40, PETRI_TRANSITIONS=42} [2023-11-17 16:38:42,074 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2023-11-17 16:38:42,074 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 42 transitions, 249 flow [2023-11-17 16:38:42,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:42,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:38:42,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:38:42,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:38:42,075 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 16:38:42,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:38:42,076 INFO L85 PathProgramCache]: Analyzing trace with hash -449117898, now seen corresponding path program 4 times [2023-11-17 16:38:42,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:38:42,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782524610] [2023-11-17 16:38:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:38:42,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:38:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:38:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:38:42,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:38:42,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782524610] [2023-11-17 16:38:42,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782524610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:38:42,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:38:42,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:38:42,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426286938] [2023-11-17 16:38:42,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:38:42,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:38:42,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:38:42,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:38:42,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:38:42,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 454 [2023-11-17 16:38:42,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 249 flow. Second operand has 6 states, 6 states have (on average 150.5) internal successors, (903), 6 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:42,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:38:42,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 454 [2023-11-17 16:38:42,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:38:42,500 INFO L124 PetriNetUnfolderBase]: 115/210 cut-off events. [2023-11-17 16:38:42,500 INFO L125 PetriNetUnfolderBase]: For 367/367 co-relation queries the response was YES. [2023-11-17 16:38:42,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 210 events. 115/210 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 635 event pairs, 18 based on Foata normal form. 4/193 useless extension candidates. Maximal degree in co-relation 714. Up to 161 conditions per place. [2023-11-17 16:38:42,502 INFO L140 encePairwiseOnDemand]: 447/454 looper letters, 39 selfloop transitions, 18 changer transitions 0/57 dead transitions. [2023-11-17 16:38:42,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 418 flow [2023-11-17 16:38:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:38:42,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:38:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 932 transitions. [2023-11-17 16:38:42,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.342143906020558 [2023-11-17 16:38:42,505 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 932 transitions. [2023-11-17 16:38:42,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 932 transitions. [2023-11-17 16:38:42,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:38:42,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 932 transitions. [2023-11-17 16:38:42,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.33333333333334) internal successors, (932), 6 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:42,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 454.0) internal successors, (3178), 7 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:42,511 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 454.0) internal successors, (3178), 7 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:42,511 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 249 flow. Second operand 6 states and 932 transitions. [2023-11-17 16:38:42,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 418 flow [2023-11-17 16:38:42,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 57 transitions, 405 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-17 16:38:42,515 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 296 flow [2023-11-17 16:38:42,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2023-11-17 16:38:42,516 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-11-17 16:38:42,516 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 296 flow [2023-11-17 16:38:42,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 150.5) internal successors, (903), 6 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:42,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:38:42,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:38:42,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 16:38:42,517 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 16:38:42,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:38:42,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1709913894, now seen corresponding path program 1 times [2023-11-17 16:38:42,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:38:42,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886699028] [2023-11-17 16:38:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:38:42,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:38:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:38:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:38:42,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:38:42,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886699028] [2023-11-17 16:38:42,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886699028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:38:42,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574715003] [2023-11-17 16:38:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:38:42,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:38:42,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:38:42,745 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 16:38:42,750 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 16:38:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:38:42,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:38:42,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:38:42,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:38:42,898 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 8 [2023-11-17 16:38:42,948 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 15 treesize of output 1 [2023-11-17 16:38:43,002 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 16:38:43,047 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 16:38:43,282 INFO L349 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2023-11-17 16:38:43,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 233 treesize of output 176 [2023-11-17 16:38:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:38:43,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:38:44,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:38:44,677 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 254 treesize of output 158 [2023-11-17 16:38:44,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:38:44,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 456 treesize of output 432 [2023-11-17 16:38:44,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:38:44,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 384 treesize of output 324 [2023-11-17 16:38:44,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:38:44,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 163 treesize of output 157 [2023-11-17 16:38:48,609 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-11-17 16:38:48,779 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 16:38:48,780 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 444 treesize of output 1 [2023-11-17 16:38:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:38:48,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574715003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:38:48,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:38:48,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-17 16:38:48,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409051764] [2023-11-17 16:38:48,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:38:48,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:38:48,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:38:48,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:38:48,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=232, Unknown=8, NotChecked=0, Total=306 [2023-11-17 16:38:48,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 454 [2023-11-17 16:38:48,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 296 flow. Second operand has 18 states, 18 states have (on average 115.66666666666667) internal successors, (2082), 18 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:48,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:38:48,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 454 [2023-11-17 16:38:48,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:38:48,981 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (forall ((v_ArrVal_88 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_88) c_~f~0.base))) (let ((.cse2 (select .cse0 .cse3))) (let ((.cse1 (select .cse0 (+ c_~f~0.offset (* .cse2 4))))) (or (= c_~x1~0 (select .cse0 (+ (* .cse1 4) c_~f~0.offset))) (< .cse1 0) (< c_~size~0 (+ .cse2 1)) (< .cse2 0) (< c_~size~0 (+ .cse1 1))))))) (let ((.cse7 (select |c_#memory_int| c_~f~0.base))) (let ((.cse4 (select .cse7 .cse3))) (let ((.cse5 (select .cse7 (+ (* .cse4 4) c_~f~0.offset)))) (or (< .cse4 0) (< c_~size~0 (+ .cse5 1)) (< c_~size~0 (+ .cse4 1)) (< .cse5 0) (let ((.cse6 (select .cse7 (+ c_~f~0.offset (* 4 .cse5))))) (and (or (< .cse6 0) (= c_~x1~0 (select .cse7 (+ c_~f~0.offset (* .cse6 4)))) (< c_~size~0 (+ .cse6 1))) (= .cse6 c_~x1~0))))))) (forall ((v_ArrVal_88 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_88) c_~f~0.base))) (let ((.cse10 (select .cse11 .cse3))) (let ((.cse8 (select .cse11 (+ c_~f~0.offset (* .cse10 4))))) (let ((.cse9 (select .cse11 (+ (* .cse8 4) c_~f~0.offset)))) (or (< .cse8 0) (< .cse9 0) (< c_~size~0 (+ .cse10 1)) (= c_~x1~0 (select .cse11 (+ (* .cse9 4) c_~f~0.offset))) (< .cse10 0) (< c_~size~0 (+ .cse9 1)) (< c_~size~0 (+ .cse8 1)))))))))) is different from false [2023-11-17 16:38:50,149 INFO L124 PetriNetUnfolderBase]: 313/565 cut-off events. [2023-11-17 16:38:50,149 INFO L125 PetriNetUnfolderBase]: For 710/710 co-relation queries the response was YES. [2023-11-17 16:38:50,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1968 conditions, 565 events. 313/565 cut-off events. For 710/710 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2389 event pairs, 18 based on Foata normal form. 6/503 useless extension candidates. Maximal degree in co-relation 1848. Up to 185 conditions per place. [2023-11-17 16:38:50,153 INFO L140 encePairwiseOnDemand]: 441/454 looper letters, 67 selfloop transitions, 47 changer transitions 66/180 dead transitions. [2023-11-17 16:38:50,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 180 transitions, 1250 flow [2023-11-17 16:38:50,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 16:38:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 16:38:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2984 transitions. [2023-11-17 16:38:50,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2629074889867841 [2023-11-17 16:38:50,165 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2984 transitions. [2023-11-17 16:38:50,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2984 transitions. [2023-11-17 16:38:50,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:38:50,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2984 transitions. [2023-11-17 16:38:50,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 119.36) internal successors, (2984), 25 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:50,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 454.0) internal successors, (11804), 26 states have internal predecessors, (11804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:50,191 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 454.0) internal successors, (11804), 26 states have internal predecessors, (11804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:50,191 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 296 flow. Second operand 25 states and 2984 transitions. [2023-11-17 16:38:50,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 180 transitions, 1250 flow [2023-11-17 16:38:50,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 180 transitions, 1130 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-11-17 16:38:50,200 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 517 flow [2023-11-17 16:38:50,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=517, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2023-11-17 16:38:50,202 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 52 predicate places. [2023-11-17 16:38:50,203 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 517 flow [2023-11-17 16:38:50,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 115.66666666666667) internal successors, (2082), 18 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:50,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:38:50,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:38:50,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 16:38:50,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 16:38:50,410 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 16:38:50,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:38:50,411 INFO L85 PathProgramCache]: Analyzing trace with hash -358170831, now seen corresponding path program 1 times [2023-11-17 16:38:50,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:38:50,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104371554] [2023-11-17 16:38:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:38:50,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:38:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:38:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:38:50,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:38:50,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104371554] [2023-11-17 16:38:50,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104371554] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:38:50,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509580402] [2023-11-17 16:38:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:38:50,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:38:50,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:38:50,574 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 16:38:50,578 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 16:38:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:38:50,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:38:50,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:38:50,702 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 16:38:50,737 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 16:38:50,775 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 16:38:50,995 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:38:50,996 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 141 treesize of output 130 [2023-11-17 16:38:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:38:51,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:38:54,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:38:54,153 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 142 treesize of output 94 [2023-11-17 16:38:54,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:38:54,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 556 treesize of output 516 [2023-11-17 16:38:54,205 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:38:54,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 105 [2023-11-17 16:38:54,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:38:54,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 108 [2023-11-17 16:38:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:38:54,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509580402] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:38:54,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:38:54,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-11-17 16:38:54,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768976314] [2023-11-17 16:38:54,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:38:54,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:38:54,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:38:54,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:38:54,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=369, Unknown=2, NotChecked=0, Total=462 [2023-11-17 16:38:54,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 454 [2023-11-17 16:38:54,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 517 flow. Second operand has 22 states, 22 states have (on average 115.18181818181819) internal successors, (2534), 22 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:54,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:38:54,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 454 [2023-11-17 16:38:54,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:38:56,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:39:00,880 INFO L124 PetriNetUnfolderBase]: 589/1118 cut-off events. [2023-11-17 16:39:00,881 INFO L125 PetriNetUnfolderBase]: For 2044/2044 co-relation queries the response was YES. [2023-11-17 16:39:00,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4601 conditions, 1118 events. 589/1118 cut-off events. For 2044/2044 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6107 event pairs, 11 based on Foata normal form. 25/1141 useless extension candidates. Maximal degree in co-relation 4491. Up to 610 conditions per place. [2023-11-17 16:39:00,889 INFO L140 encePairwiseOnDemand]: 443/454 looper letters, 157 selfloop transitions, 88 changer transitions 79/324 dead transitions. [2023-11-17 16:39:00,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 324 transitions, 2588 flow [2023-11-17 16:39:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 16:39:00,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 16:39:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 5267 transitions. [2023-11-17 16:39:00,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2636663996796155 [2023-11-17 16:39:00,905 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 5267 transitions. [2023-11-17 16:39:00,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 5267 transitions. [2023-11-17 16:39:00,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:00,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 5267 transitions. [2023-11-17 16:39:00,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 119.70454545454545) internal successors, (5267), 44 states have internal predecessors, (5267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:00,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 454.0) internal successors, (20430), 45 states have internal predecessors, (20430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:00,945 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 454.0) internal successors, (20430), 45 states have internal predecessors, (20430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:00,946 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 517 flow. Second operand 44 states and 5267 transitions. [2023-11-17 16:39:00,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 324 transitions, 2588 flow [2023-11-17 16:39:00,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 324 transitions, 2386 flow, removed 74 selfloop flow, removed 10 redundant places. [2023-11-17 16:39:00,962 INFO L231 Difference]: Finished difference. Result has 114 places, 125 transitions, 1173 flow [2023-11-17 16:39:00,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1173, PETRI_PLACES=114, PETRI_TRANSITIONS=125} [2023-11-17 16:39:00,963 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 93 predicate places. [2023-11-17 16:39:00,963 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 125 transitions, 1173 flow [2023-11-17 16:39:00,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 115.18181818181819) internal successors, (2534), 22 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:00,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:00,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:00,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-17 16:39:01,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-17 16:39:01,174 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 16:39:01,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:01,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1420025353, now seen corresponding path program 2 times [2023-11-17 16:39:01,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:01,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416383476] [2023-11-17 16:39:01,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:01,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:39:01,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:01,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416383476] [2023-11-17 16:39:01,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416383476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:01,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874188396] [2023-11-17 16:39:01,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:39:01,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:01,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:01,413 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 16:39:01,440 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 16:39:01,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:39:01,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:01,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 16:39:01,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:01,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:02,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:02,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 199 treesize of output 160 [2023-11-17 16:39:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:39:03,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874188396] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:03,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:03,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 18 [2023-11-17 16:39:03,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140515839] [2023-11-17 16:39:03,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:03,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:39:03,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:03,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:39:03,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:39:03,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 454 [2023-11-17 16:39:03,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 125 transitions, 1173 flow. Second operand has 18 states, 18 states have (on average 123.16666666666667) internal successors, (2217), 18 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:03,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:03,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 454 [2023-11-17 16:39:03,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:06,238 INFO L124 PetriNetUnfolderBase]: 509/1049 cut-off events. [2023-11-17 16:39:06,238 INFO L125 PetriNetUnfolderBase]: For 5054/5054 co-relation queries the response was YES. [2023-11-17 16:39:06,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5396 conditions, 1049 events. 509/1049 cut-off events. For 5054/5054 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6137 event pairs, 127 based on Foata normal form. 11/1059 useless extension candidates. Maximal degree in co-relation 5204. Up to 748 conditions per place. [2023-11-17 16:39:06,244 INFO L140 encePairwiseOnDemand]: 444/454 looper letters, 149 selfloop transitions, 66 changer transitions 27/242 dead transitions. [2023-11-17 16:39:06,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 242 transitions, 2397 flow [2023-11-17 16:39:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:39:06,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:39:06,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3665 transitions. [2023-11-17 16:39:06,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27836852498860704 [2023-11-17 16:39:06,257 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3665 transitions. [2023-11-17 16:39:06,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3665 transitions. [2023-11-17 16:39:06,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:06,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3665 transitions. [2023-11-17 16:39:06,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 126.37931034482759) internal successors, (3665), 29 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:06,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 454.0) internal successors, (13620), 30 states have internal predecessors, (13620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:06,286 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 454.0) internal successors, (13620), 30 states have internal predecessors, (13620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:06,287 INFO L175 Difference]: Start difference. First operand has 114 places, 125 transitions, 1173 flow. Second operand 29 states and 3665 transitions. [2023-11-17 16:39:06,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 242 transitions, 2397 flow [2023-11-17 16:39:06,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 242 transitions, 2163 flow, removed 97 selfloop flow, removed 12 redundant places. [2023-11-17 16:39:06,313 INFO L231 Difference]: Finished difference. Result has 136 places, 155 transitions, 1530 flow [2023-11-17 16:39:06,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1530, PETRI_PLACES=136, PETRI_TRANSITIONS=155} [2023-11-17 16:39:06,316 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 115 predicate places. [2023-11-17 16:39:06,316 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 155 transitions, 1530 flow [2023-11-17 16:39:06,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 123.16666666666667) internal successors, (2217), 18 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:06,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:06,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:06,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 16:39:06,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:06,523 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 16:39:06,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:06,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1145675551, now seen corresponding path program 3 times [2023-11-17 16:39:06,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:06,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606224870] [2023-11-17 16:39:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:06,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:39:06,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:06,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606224870] [2023-11-17 16:39:06,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606224870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:06,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429938310] [2023-11-17 16:39:06,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:39:06,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:06,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:06,691 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 16:39:06,693 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 16:39:06,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:39:06,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:06,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 16:39:06,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:07,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:07,201 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:07,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 188 treesize of output 188 [2023-11-17 16:39:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:08,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429938310] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:08,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:08,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-11-17 16:39:08,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183567841] [2023-11-17 16:39:08,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:08,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:39:08,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:08,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:39:08,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:39:08,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 454 [2023-11-17 16:39:08,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 155 transitions, 1530 flow. Second operand has 20 states, 20 states have (on average 123.4) internal successors, (2468), 20 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:08,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:08,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 454 [2023-11-17 16:39:08,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:09,458 INFO L124 PetriNetUnfolderBase]: 551/1179 cut-off events. [2023-11-17 16:39:09,458 INFO L125 PetriNetUnfolderBase]: For 5498/5498 co-relation queries the response was YES. [2023-11-17 16:39:09,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5966 conditions, 1179 events. 551/1179 cut-off events. For 5498/5498 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7391 event pairs, 55 based on Foata normal form. 4/1176 useless extension candidates. Maximal degree in co-relation 5883. Up to 594 conditions per place. [2023-11-17 16:39:09,466 INFO L140 encePairwiseOnDemand]: 444/454 looper letters, 147 selfloop transitions, 91 changer transitions 10/248 dead transitions. [2023-11-17 16:39:09,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 248 transitions, 2670 flow [2023-11-17 16:39:09,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 16:39:09,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 16:39:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3145 transitions. [2023-11-17 16:39:09,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27709251101321586 [2023-11-17 16:39:09,472 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3145 transitions. [2023-11-17 16:39:09,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3145 transitions. [2023-11-17 16:39:09,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:09,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3145 transitions. [2023-11-17 16:39:09,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 125.8) internal successors, (3145), 25 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:09,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 454.0) internal successors, (11804), 26 states have internal predecessors, (11804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:09,489 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 454.0) internal successors, (11804), 26 states have internal predecessors, (11804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:09,489 INFO L175 Difference]: Start difference. First operand has 136 places, 155 transitions, 1530 flow. Second operand 25 states and 3145 transitions. [2023-11-17 16:39:09,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 248 transitions, 2670 flow [2023-11-17 16:39:09,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 248 transitions, 2559 flow, removed 32 selfloop flow, removed 15 redundant places. [2023-11-17 16:39:09,520 INFO L231 Difference]: Finished difference. Result has 144 places, 180 transitions, 1969 flow [2023-11-17 16:39:09,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1969, PETRI_PLACES=144, PETRI_TRANSITIONS=180} [2023-11-17 16:39:09,521 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 123 predicate places. [2023-11-17 16:39:09,521 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 180 transitions, 1969 flow [2023-11-17 16:39:09,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 123.4) internal successors, (2468), 20 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:09,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:09,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:09,539 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 16:39:09,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:09,731 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 16:39:09,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:09,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1844416839, now seen corresponding path program 4 times [2023-11-17 16:39:09,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:09,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762045967] [2023-11-17 16:39:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:09,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:39:09,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:09,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762045967] [2023-11-17 16:39:09,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762045967] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:09,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224313607] [2023-11-17 16:39:09,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:39:09,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:09,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:09,989 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 16:39:09,990 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 16:39:10,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:39:10,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:10,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-17 16:39:10,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:10,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:39:10,070 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 8 [2023-11-17 16:39:10,110 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 15 treesize of output 1 [2023-11-17 16:39:10,154 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 16:39:10,238 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 16:39:10,391 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:39:10,391 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 141 treesize of output 130 [2023-11-17 16:39:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:10,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:11,704 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:11,705 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 139 treesize of output 91 [2023-11-17 16:39:11,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:11,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 396 treesize of output 356 [2023-11-17 16:39:11,747 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:11,747 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 188 [2023-11-17 16:39:11,771 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:11,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 105 [2023-11-17 16:39:12,105 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-11-17 16:39:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:12,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224313607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:12,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:12,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-11-17 16:39:12,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293536438] [2023-11-17 16:39:12,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:12,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:39:12,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:12,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:39:12,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=382, Unknown=2, NotChecked=0, Total=462 [2023-11-17 16:39:12,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 454 [2023-11-17 16:39:12,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 180 transitions, 1969 flow. Second operand has 22 states, 22 states have (on average 115.18181818181819) internal successors, (2534), 22 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:12,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:12,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 454 [2023-11-17 16:39:12,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:14,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:39:19,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:39:20,032 INFO L124 PetriNetUnfolderBase]: 683/1489 cut-off events. [2023-11-17 16:39:20,033 INFO L125 PetriNetUnfolderBase]: For 8990/8990 co-relation queries the response was YES. [2023-11-17 16:39:20,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8196 conditions, 1489 events. 683/1489 cut-off events. For 8990/8990 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9970 event pairs, 62 based on Foata normal form. 29/1511 useless extension candidates. Maximal degree in co-relation 7963. Up to 766 conditions per place. [2023-11-17 16:39:20,041 INFO L140 encePairwiseOnDemand]: 443/454 looper letters, 176 selfloop transitions, 150 changer transitions 81/407 dead transitions. [2023-11-17 16:39:20,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 407 transitions, 4490 flow [2023-11-17 16:39:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-17 16:39:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-17 16:39:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4671 transitions. [2023-11-17 16:39:20,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2638088783463233 [2023-11-17 16:39:20,048 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4671 transitions. [2023-11-17 16:39:20,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4671 transitions. [2023-11-17 16:39:20,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:20,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4671 transitions. [2023-11-17 16:39:20,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 119.76923076923077) internal successors, (4671), 39 states have internal predecessors, (4671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:20,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 454.0) internal successors, (18160), 40 states have internal predecessors, (18160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:20,071 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 454.0) internal successors, (18160), 40 states have internal predecessors, (18160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:20,071 INFO L175 Difference]: Start difference. First operand has 144 places, 180 transitions, 1969 flow. Second operand 39 states and 4671 transitions. [2023-11-17 16:39:20,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 407 transitions, 4490 flow [2023-11-17 16:39:20,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 407 transitions, 4324 flow, removed 30 selfloop flow, removed 16 redundant places. [2023-11-17 16:39:20,124 INFO L231 Difference]: Finished difference. Result has 175 places, 207 transitions, 2626 flow [2023-11-17 16:39:20,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2626, PETRI_PLACES=175, PETRI_TRANSITIONS=207} [2023-11-17 16:39:20,125 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2023-11-17 16:39:20,125 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 207 transitions, 2626 flow [2023-11-17 16:39:20,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 115.18181818181819) internal successors, (2534), 22 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:20,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:20,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:20,136 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 16:39:20,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-17 16:39:20,334 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 16:39:20,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:20,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1212289255, now seen corresponding path program 5 times [2023-11-17 16:39:20,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:20,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134001793] [2023-11-17 16:39:20,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:20,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:39:20,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:20,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134001793] [2023-11-17 16:39:20,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134001793] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:20,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412850916] [2023-11-17 16:39:20,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:39:20,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:20,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:20,534 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 16:39:20,552 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 16:39:20,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:39:20,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:20,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:39:20,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:20,669 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 16:39:20,703 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 16:39:20,728 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 16:39:20,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 131 treesize of output 119 [2023-11-17 16:39:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:20,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:23,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:23,018 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 142 treesize of output 94 [2023-11-17 16:39:23,037 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:23,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 556 treesize of output 516 [2023-11-17 16:39:23,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:23,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 105 [2023-11-17 16:39:23,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:23,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 108 [2023-11-17 16:39:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:23,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412850916] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:23,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:23,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-11-17 16:39:23,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889641910] [2023-11-17 16:39:23,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:23,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:39:23,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:23,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:39:23,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=374, Unknown=1, NotChecked=0, Total=462 [2023-11-17 16:39:23,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 454 [2023-11-17 16:39:23,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 207 transitions, 2626 flow. Second operand has 22 states, 22 states have (on average 115.18181818181819) internal successors, (2534), 22 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:23,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:23,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 454 [2023-11-17 16:39:23,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:25,416 INFO L124 PetriNetUnfolderBase]: 533/1120 cut-off events. [2023-11-17 16:39:25,416 INFO L125 PetriNetUnfolderBase]: For 8932/8932 co-relation queries the response was YES. [2023-11-17 16:39:25,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7009 conditions, 1120 events. 533/1120 cut-off events. For 8932/8932 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6727 event pairs, 36 based on Foata normal form. 12/1131 useless extension candidates. Maximal degree in co-relation 6705. Up to 745 conditions per place. [2023-11-17 16:39:25,426 INFO L140 encePairwiseOnDemand]: 443/454 looper letters, 183 selfloop transitions, 94 changer transitions 15/292 dead transitions. [2023-11-17 16:39:25,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 292 transitions, 3800 flow [2023-11-17 16:39:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 16:39:25,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 16:39:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3203 transitions. [2023-11-17 16:39:25,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2612987436775983 [2023-11-17 16:39:25,431 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3203 transitions. [2023-11-17 16:39:25,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3203 transitions. [2023-11-17 16:39:25,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:25,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3203 transitions. [2023-11-17 16:39:25,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 118.62962962962963) internal successors, (3203), 27 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:25,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 454.0) internal successors, (12712), 28 states have internal predecessors, (12712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:25,446 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 454.0) internal successors, (12712), 28 states have internal predecessors, (12712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:25,446 INFO L175 Difference]: Start difference. First operand has 175 places, 207 transitions, 2626 flow. Second operand 27 states and 3203 transitions. [2023-11-17 16:39:25,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 292 transitions, 3800 flow [2023-11-17 16:39:25,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 292 transitions, 3447 flow, removed 133 selfloop flow, removed 22 redundant places. [2023-11-17 16:39:25,494 INFO L231 Difference]: Finished difference. Result has 172 places, 208 transitions, 2578 flow [2023-11-17 16:39:25,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=2302, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2578, PETRI_PLACES=172, PETRI_TRANSITIONS=208} [2023-11-17 16:39:25,494 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 151 predicate places. [2023-11-17 16:39:25,494 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 208 transitions, 2578 flow [2023-11-17 16:39:25,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 115.18181818181819) internal successors, (2534), 22 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:25,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:25,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:25,505 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 16:39:25,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:25,698 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 16:39:25,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:25,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1486639057, now seen corresponding path program 6 times [2023-11-17 16:39:25,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:25,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122868416] [2023-11-17 16:39:25,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:25,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:39:25,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:25,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122868416] [2023-11-17 16:39:25,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122868416] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:25,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729210716] [2023-11-17 16:39:25,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:39:25,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:25,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:25,914 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 16:39:25,917 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 16:39:26,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:39:26,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:26,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 16:39:26,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:26,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:26,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:26,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 188 treesize of output 188 [2023-11-17 16:39:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:27,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729210716] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:27,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:27,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-11-17 16:39:27,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740012309] [2023-11-17 16:39:27,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:27,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:39:27,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:27,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:39:27,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:39:27,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 454 [2023-11-17 16:39:27,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 208 transitions, 2578 flow. Second operand has 20 states, 20 states have (on average 123.4) internal successors, (2468), 20 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:27,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:27,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 454 [2023-11-17 16:39:27,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:28,158 INFO L124 PetriNetUnfolderBase]: 538/1123 cut-off events. [2023-11-17 16:39:28,158 INFO L125 PetriNetUnfolderBase]: For 7308/7308 co-relation queries the response was YES. [2023-11-17 16:39:28,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6878 conditions, 1123 events. 538/1123 cut-off events. For 7308/7308 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6748 event pairs, 16 based on Foata normal form. 4/1126 useless extension candidates. Maximal degree in co-relation 6723. Up to 562 conditions per place. [2023-11-17 16:39:28,170 INFO L140 encePairwiseOnDemand]: 444/454 looper letters, 139 selfloop transitions, 129 changer transitions 4/272 dead transitions. [2023-11-17 16:39:28,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 272 transitions, 3505 flow [2023-11-17 16:39:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 16:39:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 16:39:28,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2898 transitions. [2023-11-17 16:39:28,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2775330396475771 [2023-11-17 16:39:28,175 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2898 transitions. [2023-11-17 16:39:28,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2898 transitions. [2023-11-17 16:39:28,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:28,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2898 transitions. [2023-11-17 16:39:28,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 126.0) internal successors, (2898), 23 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:28,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 454.0) internal successors, (10896), 24 states have internal predecessors, (10896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:28,226 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 454.0) internal successors, (10896), 24 states have internal predecessors, (10896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:28,226 INFO L175 Difference]: Start difference. First operand has 172 places, 208 transitions, 2578 flow. Second operand 23 states and 2898 transitions. [2023-11-17 16:39:28,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 272 transitions, 3505 flow [2023-11-17 16:39:28,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 272 transitions, 3350 flow, removed 39 selfloop flow, removed 17 redundant places. [2023-11-17 16:39:28,270 INFO L231 Difference]: Finished difference. Result has 177 places, 215 transitions, 2795 flow [2023-11-17 16:39:28,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2795, PETRI_PLACES=177, PETRI_TRANSITIONS=215} [2023-11-17 16:39:28,271 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 156 predicate places. [2023-11-17 16:39:28,271 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 215 transitions, 2795 flow [2023-11-17 16:39:28,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 123.4) internal successors, (2468), 20 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:28,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:28,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:28,283 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 16:39:28,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:28,478 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 16:39:28,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:28,479 INFO L85 PathProgramCache]: Analyzing trace with hash 862668721, now seen corresponding path program 7 times [2023-11-17 16:39:28,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:28,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861610208] [2023-11-17 16:39:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:28,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:39:28,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:28,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861610208] [2023-11-17 16:39:28,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861610208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:28,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000685964] [2023-11-17 16:39:28,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:39:28,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:28,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:28,677 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 16:39:28,696 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 16:39:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:28,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 16:39:28,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:29,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:29,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:29,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 188 treesize of output 188 [2023-11-17 16:39:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:29,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000685964] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:29,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:29,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-11-17 16:39:29,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424300822] [2023-11-17 16:39:29,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:29,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:39:29,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:29,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:39:29,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:39:29,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 454 [2023-11-17 16:39:29,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 215 transitions, 2795 flow. Second operand has 20 states, 20 states have (on average 123.4) internal successors, (2468), 20 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:29,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:29,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 454 [2023-11-17 16:39:29,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:30,702 INFO L124 PetriNetUnfolderBase]: 531/1118 cut-off events. [2023-11-17 16:39:30,702 INFO L125 PetriNetUnfolderBase]: For 7847/7847 co-relation queries the response was YES. [2023-11-17 16:39:30,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7080 conditions, 1118 events. 531/1118 cut-off events. For 7847/7847 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6735 event pairs, 8 based on Foata normal form. 4/1121 useless extension candidates. Maximal degree in co-relation 6966. Up to 557 conditions per place. [2023-11-17 16:39:30,710 INFO L140 encePairwiseOnDemand]: 444/454 looper letters, 138 selfloop transitions, 126 changer transitions 6/270 dead transitions. [2023-11-17 16:39:30,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 270 transitions, 3644 flow [2023-11-17 16:39:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:39:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:39:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2523 transitions. [2023-11-17 16:39:30,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.277863436123348 [2023-11-17 16:39:30,714 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2523 transitions. [2023-11-17 16:39:30,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2523 transitions. [2023-11-17 16:39:30,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:30,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2523 transitions. [2023-11-17 16:39:30,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 126.15) internal successors, (2523), 20 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:30,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 454.0) internal successors, (9534), 21 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:30,725 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 454.0) internal successors, (9534), 21 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:30,726 INFO L175 Difference]: Start difference. First operand has 177 places, 215 transitions, 2795 flow. Second operand 20 states and 2523 transitions. [2023-11-17 16:39:30,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 270 transitions, 3644 flow [2023-11-17 16:39:30,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 270 transitions, 3511 flow, removed 25 selfloop flow, removed 18 redundant places. [2023-11-17 16:39:30,773 INFO L231 Difference]: Finished difference. Result has 176 places, 214 transitions, 2930 flow [2023-11-17 16:39:30,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=2646, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2930, PETRI_PLACES=176, PETRI_TRANSITIONS=214} [2023-11-17 16:39:30,773 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2023-11-17 16:39:30,774 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 214 transitions, 2930 flow [2023-11-17 16:39:30,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 123.4) internal successors, (2468), 20 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:30,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:30,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:30,779 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 16:39:30,975 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,SelfDestructingSolverStorable12 [2023-11-17 16:39:30,975 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 16:39:30,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:30,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1545155766, now seen corresponding path program 8 times [2023-11-17 16:39:30,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:30,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135523467] [2023-11-17 16:39:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:30,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:31,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:31,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135523467] [2023-11-17 16:39:31,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135523467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:31,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683453224] [2023-11-17 16:39:31,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:39:31,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:31,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:31,223 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 16:39:31,249 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 16:39:31,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:39:31,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:31,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 16:39:31,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:31,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:31,536 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 141 treesize of output 135 [2023-11-17 16:39:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:31,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:32,129 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-11-17 16:39:32,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 42 [2023-11-17 16:39:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:32,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683453224] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:32,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:32,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-11-17 16:39:32,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814630999] [2023-11-17 16:39:32,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:32,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:39:32,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:32,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:39:32,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:39:32,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 454 [2023-11-17 16:39:32,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 214 transitions, 2930 flow. Second operand has 17 states, 17 states have (on average 137.35294117647058) internal successors, (2335), 17 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:32,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:32,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 454 [2023-11-17 16:39:32,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:34,181 INFO L124 PetriNetUnfolderBase]: 720/1493 cut-off events. [2023-11-17 16:39:34,181 INFO L125 PetriNetUnfolderBase]: For 13986/13986 co-relation queries the response was YES. [2023-11-17 16:39:34,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9989 conditions, 1493 events. 720/1493 cut-off events. For 13986/13986 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9527 event pairs, 69 based on Foata normal form. 6/1498 useless extension candidates. Maximal degree in co-relation 9833. Up to 757 conditions per place. [2023-11-17 16:39:34,196 INFO L140 encePairwiseOnDemand]: 444/454 looper letters, 193 selfloop transitions, 162 changer transitions 15/370 dead transitions. [2023-11-17 16:39:34,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 370 transitions, 5227 flow [2023-11-17 16:39:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 16:39:34,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 16:39:34,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3824 transitions. [2023-11-17 16:39:34,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31195953662914017 [2023-11-17 16:39:34,201 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3824 transitions. [2023-11-17 16:39:34,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3824 transitions. [2023-11-17 16:39:34,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:34,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3824 transitions. [2023-11-17 16:39:34,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 141.62962962962962) internal successors, (3824), 27 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:34,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 454.0) internal successors, (12712), 28 states have internal predecessors, (12712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:34,215 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 454.0) internal successors, (12712), 28 states have internal predecessors, (12712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:34,215 INFO L175 Difference]: Start difference. First operand has 176 places, 214 transitions, 2930 flow. Second operand 27 states and 3824 transitions. [2023-11-17 16:39:34,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 370 transitions, 5227 flow [2023-11-17 16:39:34,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 370 transitions, 5011 flow, removed 29 selfloop flow, removed 13 redundant places. [2023-11-17 16:39:34,290 INFO L231 Difference]: Finished difference. Result has 197 places, 266 transitions, 4111 flow [2023-11-17 16:39:34,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4111, PETRI_PLACES=197, PETRI_TRANSITIONS=266} [2023-11-17 16:39:34,291 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 176 predicate places. [2023-11-17 16:39:34,291 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 266 transitions, 4111 flow [2023-11-17 16:39:34,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 137.35294117647058) internal successors, (2335), 17 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:34,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:34,292 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:34,307 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 16:39:34,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 16:39:34,507 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 16:39:34,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:34,508 INFO L85 PathProgramCache]: Analyzing trace with hash -308554513, now seen corresponding path program 2 times [2023-11-17 16:39:34,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:34,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048187894] [2023-11-17 16:39:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:34,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:34,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:34,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048187894] [2023-11-17 16:39:34,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048187894] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:34,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321675078] [2023-11-17 16:39:34,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:39:34,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:34,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:34,689 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 16:39:34,717 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 16:39:34,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:39:34,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:34,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:39:34,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:34,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:35,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321675078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:35,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:35,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 16:39:35,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070703741] [2023-11-17 16:39:35,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:35,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:39:35,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:35,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:39:35,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:39:35,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:39:35,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 266 transitions, 4111 flow. Second operand has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:35,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:35,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:39:35,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:35,720 INFO L124 PetriNetUnfolderBase]: 722/1481 cut-off events. [2023-11-17 16:39:35,721 INFO L125 PetriNetUnfolderBase]: For 16033/16033 co-relation queries the response was YES. [2023-11-17 16:39:35,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10650 conditions, 1481 events. 722/1481 cut-off events. For 16033/16033 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9349 event pairs, 113 based on Foata normal form. 16/1497 useless extension candidates. Maximal degree in co-relation 10498. Up to 747 conditions per place. [2023-11-17 16:39:35,732 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 203 selfloop transitions, 137 changer transitions 0/340 dead transitions. [2023-11-17 16:39:35,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 340 transitions, 5306 flow [2023-11-17 16:39:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:39:35,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:39:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2987 transitions. [2023-11-17 16:39:35,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38701736201088366 [2023-11-17 16:39:35,736 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2987 transitions. [2023-11-17 16:39:35,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2987 transitions. [2023-11-17 16:39:35,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:35,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2987 transitions. [2023-11-17 16:39:35,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 175.7058823529412) internal successors, (2987), 17 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:35,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 454.0) internal successors, (8172), 18 states have internal predecessors, (8172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:35,746 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 454.0) internal successors, (8172), 18 states have internal predecessors, (8172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:35,746 INFO L175 Difference]: Start difference. First operand has 197 places, 266 transitions, 4111 flow. Second operand 17 states and 2987 transitions. [2023-11-17 16:39:35,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 340 transitions, 5306 flow [2023-11-17 16:39:35,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 340 transitions, 5122 flow, removed 62 selfloop flow, removed 9 redundant places. [2023-11-17 16:39:35,842 INFO L231 Difference]: Finished difference. Result has 203 places, 271 transitions, 4331 flow [2023-11-17 16:39:35,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=3934, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4331, PETRI_PLACES=203, PETRI_TRANSITIONS=271} [2023-11-17 16:39:35,843 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 182 predicate places. [2023-11-17 16:39:35,843 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 271 transitions, 4331 flow [2023-11-17 16:39:35,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:35,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:35,843 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:35,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-17 16:39:36,049 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,SelfDestructingSolverStorable14 [2023-11-17 16:39:36,049 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 16:39:36,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1274712958, now seen corresponding path program 9 times [2023-11-17 16:39:36,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:36,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637978234] [2023-11-17 16:39:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:36,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:36,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:36,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637978234] [2023-11-17 16:39:36,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637978234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:36,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912439464] [2023-11-17 16:39:36,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:39:36,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:36,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:36,214 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 16:39:36,237 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 16:39:36,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:39:36,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:36,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 16:39:36,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:36,509 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:36,511 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 141 treesize of output 135 [2023-11-17 16:39:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:36,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:36,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:36,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 176 treesize of output 145 [2023-11-17 16:39:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:37,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912439464] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:37,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:37,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-11-17 16:39:37,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21505521] [2023-11-17 16:39:37,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:37,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:39:37,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:37,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:39:37,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:39:37,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 454 [2023-11-17 16:39:37,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 271 transitions, 4331 flow. Second operand has 17 states, 17 states have (on average 137.1764705882353) internal successors, (2332), 17 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:37,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:37,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 454 [2023-11-17 16:39:37,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:39,069 INFO L124 PetriNetUnfolderBase]: 774/1597 cut-off events. [2023-11-17 16:39:39,070 INFO L125 PetriNetUnfolderBase]: For 17235/17235 co-relation queries the response was YES. [2023-11-17 16:39:39,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11670 conditions, 1597 events. 774/1597 cut-off events. For 17235/17235 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 10223 event pairs, 120 based on Foata normal form. 5/1601 useless extension candidates. Maximal degree in co-relation 11521. Up to 1191 conditions per place. [2023-11-17 16:39:39,081 INFO L140 encePairwiseOnDemand]: 445/454 looper letters, 259 selfloop transitions, 76 changer transitions 16/351 dead transitions. [2023-11-17 16:39:39,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 351 transitions, 5718 flow [2023-11-17 16:39:39,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 16:39:39,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 16:39:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2956 transitions. [2023-11-17 16:39:39,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31004824837423955 [2023-11-17 16:39:39,084 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2956 transitions. [2023-11-17 16:39:39,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2956 transitions. [2023-11-17 16:39:39,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:39,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2956 transitions. [2023-11-17 16:39:39,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 140.76190476190476) internal successors, (2956), 21 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:39,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 454.0) internal successors, (9988), 22 states have internal predecessors, (9988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:39,095 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 454.0) internal successors, (9988), 22 states have internal predecessors, (9988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:39,095 INFO L175 Difference]: Start difference. First operand has 203 places, 271 transitions, 4331 flow. Second operand 21 states and 2956 transitions. [2023-11-17 16:39:39,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 351 transitions, 5718 flow [2023-11-17 16:39:39,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 351 transitions, 5588 flow, removed 32 selfloop flow, removed 9 redundant places. [2023-11-17 16:39:39,214 INFO L231 Difference]: Finished difference. Result has 220 places, 283 transitions, 4647 flow [2023-11-17 16:39:39,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4647, PETRI_PLACES=220, PETRI_TRANSITIONS=283} [2023-11-17 16:39:39,214 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 199 predicate places. [2023-11-17 16:39:39,214 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 283 transitions, 4647 flow [2023-11-17 16:39:39,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 137.1764705882353) internal successors, (2332), 17 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:39,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:39,215 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:39,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 16:39:39,415 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,SelfDestructingSolverStorable15 [2023-11-17 16:39:39,415 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 16:39:39,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:39,416 INFO L85 PathProgramCache]: Analyzing trace with hash -320516448, now seen corresponding path program 10 times [2023-11-17 16:39:39,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:39,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641767984] [2023-11-17 16:39:39,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:39,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:39,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:39,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641767984] [2023-11-17 16:39:39,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641767984] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:39,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117229351] [2023-11-17 16:39:39,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:39:39,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:39,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:39,877 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 16:39:39,885 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 16:39:39,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:39:39,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:39,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:39:39,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:40,302 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 16:39:40,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2023-11-17 16:39:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:40,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:40,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:39:40,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 65 [2023-11-17 16:39:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:41,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117229351] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:41,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:41,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-17 16:39:41,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707501465] [2023-11-17 16:39:41,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:41,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:39:41,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:41,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:39:41,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:39:41,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 454 [2023-11-17 16:39:41,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 283 transitions, 4647 flow. Second operand has 19 states, 19 states have (on average 123.15789473684211) internal successors, (2340), 19 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:41,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:41,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 454 [2023-11-17 16:39:41,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:41,467 INFO L124 PetriNetUnfolderBase]: 770/1569 cut-off events. [2023-11-17 16:39:41,467 INFO L125 PetriNetUnfolderBase]: For 18569/18569 co-relation queries the response was YES. [2023-11-17 16:39:41,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11704 conditions, 1569 events. 770/1569 cut-off events. For 18569/18569 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9860 event pairs, 147 based on Foata normal form. 4/1573 useless extension candidates. Maximal degree in co-relation 11551. Up to 1433 conditions per place. [2023-11-17 16:39:41,478 INFO L140 encePairwiseOnDemand]: 446/454 looper letters, 255 selfloop transitions, 16 changer transitions 29/300 dead transitions. [2023-11-17 16:39:41,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 300 transitions, 5364 flow [2023-11-17 16:39:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:39:41,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:39:41,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1261 transitions. [2023-11-17 16:39:41,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2777533039647577 [2023-11-17 16:39:41,480 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1261 transitions. [2023-11-17 16:39:41,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1261 transitions. [2023-11-17 16:39:41,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:41,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1261 transitions. [2023-11-17 16:39:41,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 126.1) internal successors, (1261), 10 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:41,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 454.0) internal successors, (4994), 11 states have internal predecessors, (4994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:41,485 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 454.0) internal successors, (4994), 11 states have internal predecessors, (4994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:41,485 INFO L175 Difference]: Start difference. First operand has 220 places, 283 transitions, 4647 flow. Second operand 10 states and 1261 transitions. [2023-11-17 16:39:41,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 300 transitions, 5364 flow [2023-11-17 16:39:41,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 300 transitions, 5231 flow, removed 14 selfloop flow, removed 13 redundant places. [2023-11-17 16:39:41,603 INFO L231 Difference]: Finished difference. Result has 213 places, 266 transitions, 4329 flow [2023-11-17 16:39:41,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=4514, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4329, PETRI_PLACES=213, PETRI_TRANSITIONS=266} [2023-11-17 16:39:41,604 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 192 predicate places. [2023-11-17 16:39:41,604 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 266 transitions, 4329 flow [2023-11-17 16:39:41,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 123.15789473684211) internal successors, (2340), 19 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:41,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:41,605 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:41,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 16:39:41,813 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,SelfDestructingSolverStorable16 [2023-11-17 16:39:41,813 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 16:39:41,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:41,814 INFO L85 PathProgramCache]: Analyzing trace with hash 129711545, now seen corresponding path program 3 times [2023-11-17 16:39:41,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:41,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444836204] [2023-11-17 16:39:41,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:41,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:42,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:42,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444836204] [2023-11-17 16:39:42,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444836204] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:42,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685539515] [2023-11-17 16:39:42,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:39:42,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:42,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:42,049 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 16:39:42,071 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 16:39:42,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:39:42,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:42,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:39:42,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:42,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:42,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685539515] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:42,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:42,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-17 16:39:42,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249702051] [2023-11-17 16:39:42,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:42,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:39:42,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:42,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:39:42,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:39:42,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:39:42,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 266 transitions, 4329 flow. Second operand has 11 states, 11 states have (on average 171.1818181818182) internal successors, (1883), 11 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:42,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:42,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:39:42,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:43,258 INFO L124 PetriNetUnfolderBase]: 1365/2639 cut-off events. [2023-11-17 16:39:43,259 INFO L125 PetriNetUnfolderBase]: For 30857/30857 co-relation queries the response was YES. [2023-11-17 16:39:43,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19370 conditions, 2639 events. 1365/2639 cut-off events. For 30857/30857 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 17720 event pairs, 61 based on Foata normal form. 8/2646 useless extension candidates. Maximal degree in co-relation 19310. Up to 1137 conditions per place. [2023-11-17 16:39:43,279 INFO L140 encePairwiseOnDemand]: 447/454 looper letters, 250 selfloop transitions, 260 changer transitions 0/510 dead transitions. [2023-11-17 16:39:43,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 510 transitions, 8770 flow [2023-11-17 16:39:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 16:39:43,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 16:39:43,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2482 transitions. [2023-11-17 16:39:43,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904971680302077 [2023-11-17 16:39:43,283 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2482 transitions. [2023-11-17 16:39:43,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2482 transitions. [2023-11-17 16:39:43,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:43,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2482 transitions. [2023-11-17 16:39:43,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 177.28571428571428) internal successors, (2482), 14 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:43,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 454.0) internal successors, (6810), 15 states have internal predecessors, (6810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:43,291 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 454.0) internal successors, (6810), 15 states have internal predecessors, (6810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:43,291 INFO L175 Difference]: Start difference. First operand has 213 places, 266 transitions, 4329 flow. Second operand 14 states and 2482 transitions. [2023-11-17 16:39:43,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 510 transitions, 8770 flow [2023-11-17 16:39:43,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 510 transitions, 8678 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-11-17 16:39:43,443 INFO L231 Difference]: Finished difference. Result has 206 places, 400 transitions, 7508 flow [2023-11-17 16:39:43,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=4269, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7508, PETRI_PLACES=206, PETRI_TRANSITIONS=400} [2023-11-17 16:39:43,444 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2023-11-17 16:39:43,444 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 400 transitions, 7508 flow [2023-11-17 16:39:43,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.1818181818182) internal successors, (1883), 11 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:43,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:43,445 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:43,451 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 16:39:43,650 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,SelfDestructingSolverStorable17 [2023-11-17 16:39:43,651 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 16:39:43,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:43,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1598179271, now seen corresponding path program 4 times [2023-11-17 16:39:43,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:43,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339211841] [2023-11-17 16:39:43,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:43,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:43,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:43,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339211841] [2023-11-17 16:39:43,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339211841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:43,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648287268] [2023-11-17 16:39:43,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:39:43,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:43,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:43,883 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 16:39:43,886 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 16:39:44,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:39:44,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:44,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:39:44,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:44,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:44,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648287268] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:44,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:44,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 16:39:44,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934372356] [2023-11-17 16:39:44,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:44,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:39:44,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:44,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:39:44,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:39:44,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:39:44,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 400 transitions, 7508 flow. Second operand has 13 states, 13 states have (on average 171.23076923076923) internal successors, (2226), 13 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:44,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:44,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:39:44,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:45,131 INFO L124 PetriNetUnfolderBase]: 1348/2604 cut-off events. [2023-11-17 16:39:45,131 INFO L125 PetriNetUnfolderBase]: For 40150/40150 co-relation queries the response was YES. [2023-11-17 16:39:45,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21159 conditions, 2604 events. 1348/2604 cut-off events. For 40150/40150 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17451 event pairs, 61 based on Foata normal form. 20/2623 useless extension candidates. Maximal degree in co-relation 21095. Up to 1134 conditions per place. [2023-11-17 16:39:45,153 INFO L140 encePairwiseOnDemand]: 447/454 looper letters, 235 selfloop transitions, 263 changer transitions 0/498 dead transitions. [2023-11-17 16:39:45,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 498 transitions, 9685 flow [2023-11-17 16:39:45,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:39:45,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:39:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2984 transitions. [2023-11-17 16:39:45,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38662866027468257 [2023-11-17 16:39:45,164 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2984 transitions. [2023-11-17 16:39:45,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2984 transitions. [2023-11-17 16:39:45,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:45,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2984 transitions. [2023-11-17 16:39:45,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 175.52941176470588) internal successors, (2984), 17 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:45,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 454.0) internal successors, (8172), 18 states have internal predecessors, (8172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:45,173 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 454.0) internal successors, (8172), 18 states have internal predecessors, (8172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:45,173 INFO L175 Difference]: Start difference. First operand has 206 places, 400 transitions, 7508 flow. Second operand 17 states and 2984 transitions. [2023-11-17 16:39:45,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 498 transitions, 9685 flow [2023-11-17 16:39:45,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 498 transitions, 9450 flow, removed 66 selfloop flow, removed 2 redundant places. [2023-11-17 16:39:45,380 INFO L231 Difference]: Finished difference. Result has 224 places, 403 transitions, 7892 flow [2023-11-17 16:39:45,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=7196, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7892, PETRI_PLACES=224, PETRI_TRANSITIONS=403} [2023-11-17 16:39:45,380 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 203 predicate places. [2023-11-17 16:39:45,380 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 403 transitions, 7892 flow [2023-11-17 16:39:45,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.23076923076923) internal successors, (2226), 13 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:45,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:45,381 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:45,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-17 16:39:45,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:45,581 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 16:39:45,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:45,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1764759747, now seen corresponding path program 5 times [2023-11-17 16:39:45,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:45,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676531634] [2023-11-17 16:39:45,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:45,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:45,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:45,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676531634] [2023-11-17 16:39:45,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676531634] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:45,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106924915] [2023-11-17 16:39:45,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:39:45,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:45,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:45,782 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 16:39:45,785 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 16:39:45,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:39:45,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:45,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:39:45,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:45,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:46,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106924915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:46,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:46,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 16:39:46,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274510448] [2023-11-17 16:39:46,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:46,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:39:46,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:46,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:39:46,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:39:46,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:39:46,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 403 transitions, 7892 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:46,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:46,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:39:46,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:47,113 INFO L124 PetriNetUnfolderBase]: 1482/2824 cut-off events. [2023-11-17 16:39:47,113 INFO L125 PetriNetUnfolderBase]: For 45844/45844 co-relation queries the response was YES. [2023-11-17 16:39:47,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23672 conditions, 2824 events. 1482/2824 cut-off events. For 45844/45844 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 18877 event pairs, 246 based on Foata normal form. 12/2835 useless extension candidates. Maximal degree in co-relation 23603. Up to 1636 conditions per place. [2023-11-17 16:39:47,133 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 297 selfloop transitions, 215 changer transitions 0/512 dead transitions. [2023-11-17 16:39:47,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 512 transitions, 10434 flow [2023-11-17 16:39:47,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 16:39:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 16:39:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2633 transitions. [2023-11-17 16:39:47,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866372980910426 [2023-11-17 16:39:47,139 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2633 transitions. [2023-11-17 16:39:47,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2633 transitions. [2023-11-17 16:39:47,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:47,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2633 transitions. [2023-11-17 16:39:47,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 175.53333333333333) internal successors, (2633), 15 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:47,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 454.0) internal successors, (7264), 16 states have internal predecessors, (7264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:47,147 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 454.0) internal successors, (7264), 16 states have internal predecessors, (7264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:47,147 INFO L175 Difference]: Start difference. First operand has 224 places, 403 transitions, 7892 flow. Second operand 15 states and 2633 transitions. [2023-11-17 16:39:47,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 512 transitions, 10434 flow [2023-11-17 16:39:47,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 512 transitions, 9821 flow, removed 30 selfloop flow, removed 12 redundant places. [2023-11-17 16:39:47,331 INFO L231 Difference]: Finished difference. Result has 232 places, 445 transitions, 8868 flow [2023-11-17 16:39:47,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=7322, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8868, PETRI_PLACES=232, PETRI_TRANSITIONS=445} [2023-11-17 16:39:47,331 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 211 predicate places. [2023-11-17 16:39:47,331 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 445 transitions, 8868 flow [2023-11-17 16:39:47,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:47,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:47,332 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:47,337 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 16:39:47,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:47,532 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 16:39:47,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:47,533 INFO L85 PathProgramCache]: Analyzing trace with hash -724312481, now seen corresponding path program 6 times [2023-11-17 16:39:47,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:47,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423493289] [2023-11-17 16:39:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:47,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:47,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:47,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423493289] [2023-11-17 16:39:47,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423493289] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:47,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271712939] [2023-11-17 16:39:47,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:39:47,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:47,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:47,709 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 16:39:47,733 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 16:39:47,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:39:47,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:47,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:39:47,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:47,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:48,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271712939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:48,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:48,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 16:39:48,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935349923] [2023-11-17 16:39:48,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:48,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:39:48,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:48,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:39:48,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:39:48,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:39:48,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 445 transitions, 8868 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:48,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:48,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:39:48,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:49,065 INFO L124 PetriNetUnfolderBase]: 1481/2813 cut-off events. [2023-11-17 16:39:49,066 INFO L125 PetriNetUnfolderBase]: For 47412/47412 co-relation queries the response was YES. [2023-11-17 16:39:49,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23839 conditions, 2813 events. 1481/2813 cut-off events. For 47412/47412 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 18758 event pairs, 71 based on Foata normal form. 6/2818 useless extension candidates. Maximal degree in co-relation 23766. Up to 1215 conditions per place. [2023-11-17 16:39:49,134 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 270 selfloop transitions, 266 changer transitions 0/536 dead transitions. [2023-11-17 16:39:49,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 536 transitions, 11064 flow [2023-11-17 16:39:49,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 16:39:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 16:39:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2640 transitions. [2023-11-17 16:39:49,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3876651982378855 [2023-11-17 16:39:49,138 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2640 transitions. [2023-11-17 16:39:49,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2640 transitions. [2023-11-17 16:39:49,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:49,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2640 transitions. [2023-11-17 16:39:49,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 176.0) internal successors, (2640), 15 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:49,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 454.0) internal successors, (7264), 16 states have internal predecessors, (7264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:49,149 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 454.0) internal successors, (7264), 16 states have internal predecessors, (7264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:49,149 INFO L175 Difference]: Start difference. First operand has 232 places, 445 transitions, 8868 flow. Second operand 15 states and 2640 transitions. [2023-11-17 16:39:49,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 536 transitions, 11064 flow [2023-11-17 16:39:49,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 536 transitions, 10813 flow, removed 64 selfloop flow, removed 7 redundant places. [2023-11-17 16:39:49,366 INFO L231 Difference]: Finished difference. Result has 241 places, 450 transitions, 9299 flow [2023-11-17 16:39:49,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=8589, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9299, PETRI_PLACES=241, PETRI_TRANSITIONS=450} [2023-11-17 16:39:49,367 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 220 predicate places. [2023-11-17 16:39:49,367 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 450 transitions, 9299 flow [2023-11-17 16:39:49,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:49,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:49,367 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:49,373 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 16:39:49,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:49,568 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 16:39:49,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:49,568 INFO L85 PathProgramCache]: Analyzing trace with hash -322549781, now seen corresponding path program 7 times [2023-11-17 16:39:49,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:49,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240497782] [2023-11-17 16:39:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:49,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:49,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:49,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240497782] [2023-11-17 16:39:49,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240497782] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:49,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267618046] [2023-11-17 16:39:49,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:39:49,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:49,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:49,797 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 16:39:49,820 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 16:39:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:49,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:39:49,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:50,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:50,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267618046] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:50,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:50,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 16:39:50,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367160982] [2023-11-17 16:39:50,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:50,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:39:50,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:50,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:39:50,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:39:50,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:39:50,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 450 transitions, 9299 flow. Second operand has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:50,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:50,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:39:50,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:51,294 INFO L124 PetriNetUnfolderBase]: 1448/2762 cut-off events. [2023-11-17 16:39:51,295 INFO L125 PetriNetUnfolderBase]: For 51110/51110 co-relation queries the response was YES. [2023-11-17 16:39:51,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24112 conditions, 2762 events. 1448/2762 cut-off events. For 51110/51110 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18386 event pairs, 245 based on Foata normal form. 36/2797 useless extension candidates. Maximal degree in co-relation 24037. Up to 1625 conditions per place. [2023-11-17 16:39:51,317 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 295 selfloop transitions, 215 changer transitions 0/510 dead transitions. [2023-11-17 16:39:51,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 510 transitions, 10827 flow [2023-11-17 16:39:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:39:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:39:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2802 transitions. [2023-11-17 16:39:51,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38573788546255505 [2023-11-17 16:39:51,320 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2802 transitions. [2023-11-17 16:39:51,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2802 transitions. [2023-11-17 16:39:51,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:51,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2802 transitions. [2023-11-17 16:39:51,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 175.125) internal successors, (2802), 16 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:51,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 454.0) internal successors, (7718), 17 states have internal predecessors, (7718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:51,326 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 454.0) internal successors, (7718), 17 states have internal predecessors, (7718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:51,326 INFO L175 Difference]: Start difference. First operand has 241 places, 450 transitions, 9299 flow. Second operand 16 states and 2802 transitions. [2023-11-17 16:39:51,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 510 transitions, 10827 flow [2023-11-17 16:39:51,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 510 transitions, 10652 flow, removed 35 selfloop flow, removed 3 redundant places. [2023-11-17 16:39:51,561 INFO L231 Difference]: Finished difference. Result has 255 places, 451 transitions, 9619 flow [2023-11-17 16:39:51,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=8956, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9619, PETRI_PLACES=255, PETRI_TRANSITIONS=451} [2023-11-17 16:39:51,562 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 234 predicate places. [2023-11-17 16:39:51,562 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 451 transitions, 9619 flow [2023-11-17 16:39:51,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:51,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:51,563 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 16:39:51,568 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 16:39:51,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:51,764 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:39:51,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash -305707306, now seen corresponding path program 1 times [2023-11-17 16:39:51,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:51,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114780375] [2023-11-17 16:39:51,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:51,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:51,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:51,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114780375] [2023-11-17 16:39:51,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114780375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:51,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164456194] [2023-11-17 16:39:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:51,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:51,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:51,921 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 16:39:51,948 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 16:39:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:52,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-17 16:39:52,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:52,183 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 16:39:52,213 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 16:39:52,247 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 16:39:52,308 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 16:39:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:39:52,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:56,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164456194] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:56,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:56,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 24 [2023-11-17 16:39:56,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294368159] [2023-11-17 16:39:56,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:56,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:39:56,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:56,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:39:56,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=446, Unknown=1, NotChecked=0, Total=552 [2023-11-17 16:39:56,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 454 [2023-11-17 16:39:56,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 451 transitions, 9619 flow. Second operand has 24 states, 24 states have (on average 114.83333333333333) internal successors, (2756), 24 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:56,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:56,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 454 [2023-11-17 16:39:56,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:03,144 INFO L124 PetriNetUnfolderBase]: 1764/3323 cut-off events. [2023-11-17 16:40:03,144 INFO L125 PetriNetUnfolderBase]: For 69344/69344 co-relation queries the response was YES. [2023-11-17 16:40:03,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30476 conditions, 3323 events. 1764/3323 cut-off events. For 69344/69344 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 22626 event pairs, 74 based on Foata normal form. 12/3333 useless extension candidates. Maximal degree in co-relation 30398. Up to 1496 conditions per place. [2023-11-17 16:40:03,173 INFO L140 encePairwiseOnDemand]: 443/454 looper letters, 309 selfloop transitions, 411 changer transitions 13/733 dead transitions. [2023-11-17 16:40:03,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 733 transitions, 15072 flow [2023-11-17 16:40:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-17 16:40:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-17 16:40:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4994 transitions. [2023-11-17 16:40:03,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2619047619047619 [2023-11-17 16:40:03,180 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4994 transitions. [2023-11-17 16:40:03,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4994 transitions. [2023-11-17 16:40:03,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:03,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4994 transitions. [2023-11-17 16:40:03,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 118.9047619047619) internal successors, (4994), 42 states have internal predecessors, (4994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:03,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 454.0) internal successors, (19522), 43 states have internal predecessors, (19522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:03,198 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 454.0) internal successors, (19522), 43 states have internal predecessors, (19522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:03,198 INFO L175 Difference]: Start difference. First operand has 255 places, 451 transitions, 9619 flow. Second operand 42 states and 4994 transitions. [2023-11-17 16:40:03,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 733 transitions, 15072 flow [2023-11-17 16:40:03,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 733 transitions, 14595 flow, removed 38 selfloop flow, removed 9 redundant places. [2023-11-17 16:40:03,639 INFO L231 Difference]: Finished difference. Result has 302 places, 582 transitions, 13189 flow [2023-11-17 16:40:03,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=9289, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=13189, PETRI_PLACES=302, PETRI_TRANSITIONS=582} [2023-11-17 16:40:03,640 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 281 predicate places. [2023-11-17 16:40:03,640 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 582 transitions, 13189 flow [2023-11-17 16:40:03,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 114.83333333333333) internal successors, (2756), 24 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:03,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:03,641 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:03,646 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 16:40:03,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:03,841 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:40:03,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:03,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1173012539, now seen corresponding path program 11 times [2023-11-17 16:40:03,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:03,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887805823] [2023-11-17 16:40:03,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:03,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:40:04,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:04,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887805823] [2023-11-17 16:40:04,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887805823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:40:04,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358958245] [2023-11-17 16:40:04,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:40:04,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:04,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:40:04,468 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 16:40:04,489 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 16:40:04,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:40:04,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:40:04,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 16:40:04,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:40:04,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:40:04,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2023-11-17 16:40:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:04,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:40:05,283 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-17 16:40:05,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 77 [2023-11-17 16:40:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:05,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358958245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:40:05,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:40:05,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 17 [2023-11-17 16:40:05,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668685428] [2023-11-17 16:40:05,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:40:05,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:40:05,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:05,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:40:05,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:40:05,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 454 [2023-11-17 16:40:05,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 582 transitions, 13189 flow. Second operand has 19 states, 19 states have (on average 123.21052631578948) internal successors, (2341), 19 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:05,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:05,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 454 [2023-11-17 16:40:05,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:08,732 INFO L124 PetriNetUnfolderBase]: 1887/3661 cut-off events. [2023-11-17 16:40:08,733 INFO L125 PetriNetUnfolderBase]: For 78563/78563 co-relation queries the response was YES. [2023-11-17 16:40:08,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34561 conditions, 3661 events. 1887/3661 cut-off events. For 78563/78563 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 26206 event pairs, 125 based on Foata normal form. 5/3664 useless extension candidates. Maximal degree in co-relation 34468. Up to 1651 conditions per place. [2023-11-17 16:40:08,776 INFO L140 encePairwiseOnDemand]: 442/454 looper letters, 323 selfloop transitions, 401 changer transitions 13/737 dead transitions. [2023-11-17 16:40:08,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 737 transitions, 16679 flow [2023-11-17 16:40:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 16:40:08,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 16:40:08,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4180 transitions. [2023-11-17 16:40:08,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2790014684287812 [2023-11-17 16:40:08,781 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4180 transitions. [2023-11-17 16:40:08,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4180 transitions. [2023-11-17 16:40:08,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:08,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4180 transitions. [2023-11-17 16:40:08,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 126.66666666666667) internal successors, (4180), 33 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:08,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 454.0) internal successors, (15436), 34 states have internal predecessors, (15436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:08,798 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 454.0) internal successors, (15436), 34 states have internal predecessors, (15436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:08,799 INFO L175 Difference]: Start difference. First operand has 302 places, 582 transitions, 13189 flow. Second operand 33 states and 4180 transitions. [2023-11-17 16:40:08,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 737 transitions, 16679 flow [2023-11-17 16:40:09,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 737 transitions, 15856 flow, removed 235 selfloop flow, removed 10 redundant places. [2023-11-17 16:40:09,408 INFO L231 Difference]: Finished difference. Result has 332 places, 652 transitions, 15371 flow [2023-11-17 16:40:09,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=12476, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=15371, PETRI_PLACES=332, PETRI_TRANSITIONS=652} [2023-11-17 16:40:09,409 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 311 predicate places. [2023-11-17 16:40:09,409 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 652 transitions, 15371 flow [2023-11-17 16:40:09,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 123.21052631578948) internal successors, (2341), 19 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:09,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:09,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:09,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-17 16:40:09,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:09,615 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:40:09,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:09,615 INFO L85 PathProgramCache]: Analyzing trace with hash -833435897, now seen corresponding path program 8 times [2023-11-17 16:40:09,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:09,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901780864] [2023-11-17 16:40:09,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:09,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:09,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:09,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901780864] [2023-11-17 16:40:09,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901780864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:40:09,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465376509] [2023-11-17 16:40:09,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:40:09,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:09,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:40:09,829 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:40:09,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 16:40:10,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:40:10,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:40:10,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 16:40:10,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:40:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:10,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:40:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:10,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465376509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:40:10,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:40:10,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 16:40:10,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208874124] [2023-11-17 16:40:10,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:40:10,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:40:10,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:10,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:40:10,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:40:10,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:40:10,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 652 transitions, 15371 flow. Second operand has 13 states, 13 states have (on average 171.23076923076923) internal successors, (2226), 13 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:10,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:10,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:40:10,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:11,920 INFO L124 PetriNetUnfolderBase]: 1878/3629 cut-off events. [2023-11-17 16:40:11,920 INFO L125 PetriNetUnfolderBase]: For 86534/86534 co-relation queries the response was YES. [2023-11-17 16:40:11,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35147 conditions, 3629 events. 1878/3629 cut-off events. For 86534/86534 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 25629 event pairs, 268 based on Foata normal form. 16/3645 useless extension candidates. Maximal degree in co-relation 35049. Up to 1628 conditions per place. [2023-11-17 16:40:11,955 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 427 selfloop transitions, 314 changer transitions 0/741 dead transitions. [2023-11-17 16:40:11,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 741 transitions, 17697 flow [2023-11-17 16:40:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:40:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:40:11,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3493 transitions. [2023-11-17 16:40:12,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38469162995594713 [2023-11-17 16:40:12,028 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3493 transitions. [2023-11-17 16:40:12,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3493 transitions. [2023-11-17 16:40:12,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:12,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3493 transitions. [2023-11-17 16:40:12,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 174.65) internal successors, (3493), 20 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:12,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 454.0) internal successors, (9534), 21 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:12,036 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 454.0) internal successors, (9534), 21 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:12,036 INFO L175 Difference]: Start difference. First operand has 332 places, 652 transitions, 15371 flow. Second operand 20 states and 3493 transitions. [2023-11-17 16:40:12,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 741 transitions, 17697 flow [2023-11-17 16:40:12,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 741 transitions, 17349 flow, removed 70 selfloop flow, removed 15 redundant places. [2023-11-17 16:40:12,630 INFO L231 Difference]: Finished difference. Result has 337 places, 660 transitions, 15839 flow [2023-11-17 16:40:12,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=15039, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=15839, PETRI_PLACES=337, PETRI_TRANSITIONS=660} [2023-11-17 16:40:12,631 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 316 predicate places. [2023-11-17 16:40:12,631 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 660 transitions, 15839 flow [2023-11-17 16:40:12,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.23076923076923) internal successors, (2226), 13 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:12,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:12,632 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:12,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 16:40:12,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-17 16:40:12,838 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:40:12,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:12,839 INFO L85 PathProgramCache]: Analyzing trace with hash -973185553, now seen corresponding path program 12 times [2023-11-17 16:40:12,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:12,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836849533] [2023-11-17 16:40:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:12,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:40:13,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:13,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836849533] [2023-11-17 16:40:13,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836849533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:40:13,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741425219] [2023-11-17 16:40:13,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:40:13,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:13,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:40:13,519 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:40:13,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 16:40:13,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:40:13,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:40:13,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 16:40:13,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:40:13,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:40:13,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2023-11-17 16:40:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:40:13,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:40:14,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:40:14,220 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 196 treesize of output 232 [2023-11-17 16:40:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:15,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741425219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:40:15,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:40:15,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 21 [2023-11-17 16:40:15,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979826725] [2023-11-17 16:40:15,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:40:15,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 16:40:15,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:15,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 16:40:15,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-11-17 16:40:15,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 454 [2023-11-17 16:40:15,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 660 transitions, 15839 flow. Second operand has 23 states, 23 states have (on average 122.8695652173913) internal successors, (2826), 23 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:15,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:15,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 454 [2023-11-17 16:40:15,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:17,517 INFO L124 PetriNetUnfolderBase]: 2089/4000 cut-off events. [2023-11-17 16:40:17,518 INFO L125 PetriNetUnfolderBase]: For 94451/94451 co-relation queries the response was YES. [2023-11-17 16:40:17,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39221 conditions, 4000 events. 2089/4000 cut-off events. For 94451/94451 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 28936 event pairs, 5 based on Foata normal form. 4/4004 useless extension candidates. Maximal degree in co-relation 39124. Up to 1739 conditions per place. [2023-11-17 16:40:17,553 INFO L140 encePairwiseOnDemand]: 443/454 looper letters, 248 selfloop transitions, 548 changer transitions 18/814 dead transitions. [2023-11-17 16:40:17,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 814 transitions, 19421 flow [2023-11-17 16:40:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 16:40:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 16:40:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4423 transitions. [2023-11-17 16:40:17,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27835116425424794 [2023-11-17 16:40:17,557 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4423 transitions. [2023-11-17 16:40:17,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4423 transitions. [2023-11-17 16:40:17,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:17,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4423 transitions. [2023-11-17 16:40:17,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 126.37142857142857) internal successors, (4423), 35 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:17,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 454.0) internal successors, (16344), 36 states have internal predecessors, (16344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:17,644 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 454.0) internal successors, (16344), 36 states have internal predecessors, (16344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:17,644 INFO L175 Difference]: Start difference. First operand has 337 places, 660 transitions, 15839 flow. Second operand 35 states and 4423 transitions. [2023-11-17 16:40:17,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 814 transitions, 19421 flow [2023-11-17 16:40:18,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 814 transitions, 19173 flow, removed 36 selfloop flow, removed 6 redundant places. [2023-11-17 16:40:18,191 INFO L231 Difference]: Finished difference. Result has 369 places, 710 transitions, 18210 flow [2023-11-17 16:40:18,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=15621, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=493, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18210, PETRI_PLACES=369, PETRI_TRANSITIONS=710} [2023-11-17 16:40:18,192 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 348 predicate places. [2023-11-17 16:40:18,192 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 710 transitions, 18210 flow [2023-11-17 16:40:18,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 122.8695652173913) internal successors, (2826), 23 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:18,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:18,192 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:18,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 16:40:18,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-17 16:40:18,393 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:40:18,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:18,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1648036487, now seen corresponding path program 13 times [2023-11-17 16:40:18,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:18,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199707256] [2023-11-17 16:40:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:18,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:40:18,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:18,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199707256] [2023-11-17 16:40:18,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199707256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:40:18,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211330920] [2023-11-17 16:40:18,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:40:18,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:18,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:40:18,921 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:40:18,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 16:40:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:19,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-17 16:40:19,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:40:19,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:40:19,132 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 8 [2023-11-17 16:40:19,169 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 15 treesize of output 1 [2023-11-17 16:40:19,205 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 15 treesize of output 1 [2023-11-17 16:40:19,228 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 16:40:19,253 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 16:40:19,441 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:40:19,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2023-11-17 16:40:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:40:19,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:40:24,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:40:24,882 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 2 case distinctions, treesize of input 177 treesize of output 102 [2023-11-17 16:40:24,925 INFO L349 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-11-17 16:40:24,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 213 treesize of output 248 [2023-11-17 16:40:24,980 INFO L349 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-11-17 16:40:24,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 193 [2023-11-17 16:40:25,031 INFO L349 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-11-17 16:40:25,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 117 [2023-11-17 16:40:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:40:25,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211330920] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:40:25,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:40:25,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2023-11-17 16:40:25,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270693495] [2023-11-17 16:40:25,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:40:25,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 16:40:25,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:25,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 16:40:25,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=659, Unknown=12, NotChecked=0, Total=870 [2023-11-17 16:40:25,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 454 [2023-11-17 16:40:25,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 710 transitions, 18210 flow. Second operand has 30 states, 30 states have (on average 114.53333333333333) internal successors, (3436), 30 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:25,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:25,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 454 [2023-11-17 16:40:25,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:31,376 INFO L124 PetriNetUnfolderBase]: 2320/4415 cut-off events. [2023-11-17 16:40:31,377 INFO L125 PetriNetUnfolderBase]: For 129030/129030 co-relation queries the response was YES. [2023-11-17 16:40:31,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45878 conditions, 4415 events. 2320/4415 cut-off events. For 129030/129030 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32121 event pairs, 107 based on Foata normal form. 12/4427 useless extension candidates. Maximal degree in co-relation 45776. Up to 1948 conditions per place. [2023-11-17 16:40:31,415 INFO L140 encePairwiseOnDemand]: 442/454 looper letters, 294 selfloop transitions, 602 changer transitions 17/913 dead transitions. [2023-11-17 16:40:31,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 913 transitions, 23524 flow [2023-11-17 16:40:31,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 16:40:31,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 16:40:31,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 5200 transitions. [2023-11-17 16:40:31,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2603123748498198 [2023-11-17 16:40:31,419 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 5200 transitions. [2023-11-17 16:40:31,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 5200 transitions. [2023-11-17 16:40:31,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:31,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 5200 transitions. [2023-11-17 16:40:31,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 118.18181818181819) internal successors, (5200), 44 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:31,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 454.0) internal successors, (20430), 45 states have internal predecessors, (20430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:31,432 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 454.0) internal successors, (20430), 45 states have internal predecessors, (20430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:31,432 INFO L175 Difference]: Start difference. First operand has 369 places, 710 transitions, 18210 flow. Second operand 44 states and 5200 transitions. [2023-11-17 16:40:31,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 913 transitions, 23524 flow [2023-11-17 16:40:32,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 913 transitions, 22938 flow, removed 153 selfloop flow, removed 20 redundant places. [2023-11-17 16:40:32,289 INFO L231 Difference]: Finished difference. Result has 396 places, 808 transitions, 22369 flow [2023-11-17 16:40:32,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=17693, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=22369, PETRI_PLACES=396, PETRI_TRANSITIONS=808} [2023-11-17 16:40:32,290 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 375 predicate places. [2023-11-17 16:40:32,290 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 808 transitions, 22369 flow [2023-11-17 16:40:32,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 114.53333333333333) internal successors, (3436), 30 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:32,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:32,291 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:32,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-17 16:40:32,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 16:40:32,497 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:40:32,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:32,498 INFO L85 PathProgramCache]: Analyzing trace with hash 247703339, now seen corresponding path program 9 times [2023-11-17 16:40:32,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:32,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684631710] [2023-11-17 16:40:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:32,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:32,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:32,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684631710] [2023-11-17 16:40:32,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684631710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:40:32,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864008460] [2023-11-17 16:40:32,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:40:32,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:32,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:40:32,693 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:40:32,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 16:40:32,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:40:32,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:40:32,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:40:32,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:40:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:32,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:40:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:33,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864008460] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:40:33,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:40:33,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-17 16:40:33,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952807702] [2023-11-17 16:40:33,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:40:33,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:40:33,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:33,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:40:33,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:40:33,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:40:33,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 808 transitions, 22369 flow. Second operand has 14 states, 14 states have (on average 171.0) internal successors, (2394), 14 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:33,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:33,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:40:33,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:35,813 INFO L124 PetriNetUnfolderBase]: 2513/4760 cut-off events. [2023-11-17 16:40:35,813 INFO L125 PetriNetUnfolderBase]: For 162885/162885 co-relation queries the response was YES. [2023-11-17 16:40:35,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51690 conditions, 4760 events. 2513/4760 cut-off events. For 162885/162885 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 35210 event pairs, 377 based on Foata normal form. 44/4804 useless extension candidates. Maximal degree in co-relation 51581. Up to 2013 conditions per place. [2023-11-17 16:40:35,860 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 538 selfloop transitions, 462 changer transitions 0/1000 dead transitions. [2023-11-17 16:40:35,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 1000 transitions, 27190 flow [2023-11-17 16:40:35,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 16:40:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 16:40:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5269 transitions. [2023-11-17 16:40:35,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3868575624082232 [2023-11-17 16:40:35,864 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5269 transitions. [2023-11-17 16:40:35,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5269 transitions. [2023-11-17 16:40:35,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:35,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5269 transitions. [2023-11-17 16:40:35,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 175.63333333333333) internal successors, (5269), 30 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:35,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 454.0) internal successors, (14074), 31 states have internal predecessors, (14074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:35,873 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 454.0) internal successors, (14074), 31 states have internal predecessors, (14074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:35,873 INFO L175 Difference]: Start difference. First operand has 396 places, 808 transitions, 22369 flow. Second operand 30 states and 5269 transitions. [2023-11-17 16:40:35,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 1000 transitions, 27190 flow [2023-11-17 16:40:37,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1000 transitions, 26777 flow, removed 166 selfloop flow, removed 14 redundant places. [2023-11-17 16:40:37,318 INFO L231 Difference]: Finished difference. Result has 419 places, 883 transitions, 25377 flow [2023-11-17 16:40:37,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=21961, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=25377, PETRI_PLACES=419, PETRI_TRANSITIONS=883} [2023-11-17 16:40:37,318 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 398 predicate places. [2023-11-17 16:40:37,319 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 883 transitions, 25377 flow [2023-11-17 16:40:37,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 171.0) internal successors, (2394), 14 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:37,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:37,319 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:37,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-17 16:40:37,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:37,525 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:40:37,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:37,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1199840177, now seen corresponding path program 10 times [2023-11-17 16:40:37,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:37,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447935587] [2023-11-17 16:40:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:37,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:37,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:37,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447935587] [2023-11-17 16:40:37,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447935587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:40:37,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667208036] [2023-11-17 16:40:37,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:40:37,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:37,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:40:37,689 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:40:37,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 16:40:37,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:40:37,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:40:37,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:40:37,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:40:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:37,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:40:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:38,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667208036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:40:38,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:40:38,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 16:40:38,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651725246] [2023-11-17 16:40:38,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:40:38,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:40:38,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:38,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:40:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:40:38,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:40:38,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 883 transitions, 25377 flow. Second operand has 15 states, 15 states have (on average 170.8) internal successors, (2562), 15 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:38,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:38,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:40:38,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:40,806 INFO L124 PetriNetUnfolderBase]: 2505/4716 cut-off events. [2023-11-17 16:40:40,806 INFO L125 PetriNetUnfolderBase]: For 173277/173277 co-relation queries the response was YES. [2023-11-17 16:40:40,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53203 conditions, 4716 events. 2505/4716 cut-off events. For 173277/173277 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34554 event pairs, 377 based on Foata normal form. 14/4730 useless extension candidates. Maximal degree in co-relation 53084. Up to 2007 conditions per place. [2023-11-17 16:40:40,855 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 514 selfloop transitions, 447 changer transitions 0/961 dead transitions. [2023-11-17 16:40:40,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 961 transitions, 27790 flow [2023-11-17 16:40:40,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:40:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:40:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3872 transitions. [2023-11-17 16:40:40,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3876651982378855 [2023-11-17 16:40:40,858 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3872 transitions. [2023-11-17 16:40:40,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3872 transitions. [2023-11-17 16:40:40,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:40,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3872 transitions. [2023-11-17 16:40:40,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 176.0) internal successors, (3872), 22 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:40,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 454.0) internal successors, (10442), 23 states have internal predecessors, (10442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:40,865 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 454.0) internal successors, (10442), 23 states have internal predecessors, (10442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:40,865 INFO L175 Difference]: Start difference. First operand has 419 places, 883 transitions, 25377 flow. Second operand 22 states and 3872 transitions. [2023-11-17 16:40:40,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 961 transitions, 27790 flow [2023-11-17 16:40:42,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 961 transitions, 26738 flow, removed 248 selfloop flow, removed 8 redundant places. [2023-11-17 16:40:42,194 INFO L231 Difference]: Finished difference. Result has 432 places, 880 transitions, 25118 flow [2023-11-17 16:40:42,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=24121, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=25118, PETRI_PLACES=432, PETRI_TRANSITIONS=880} [2023-11-17 16:40:42,195 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 411 predicate places. [2023-11-17 16:40:42,195 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 880 transitions, 25118 flow [2023-11-17 16:40:42,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.8) internal successors, (2562), 15 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:42,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:42,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:42,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 16:40:42,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 16:40:42,398 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:40:42,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:42,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1586349523, now seen corresponding path program 14 times [2023-11-17 16:40:42,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:42,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388648087] [2023-11-17 16:40:42,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:42,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:40:43,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:43,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388648087] [2023-11-17 16:40:43,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388648087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:40:43,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167506576] [2023-11-17 16:40:43,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:40:43,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:43,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:40:43,313 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:40:43,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 16:40:43,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:40:43,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:40:43,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 16:40:43,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:40:43,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:40:43,646 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 15 [2023-11-17 16:40:43,765 INFO L349 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2023-11-17 16:40:43,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 143 [2023-11-17 16:40:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:40:43,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:40:46,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:40:46,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 129 [2023-11-17 16:40:46,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:40:46,643 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2023-11-17 16:40:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:46,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167506576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:40:46,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:40:46,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-11-17 16:40:46,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498470870] [2023-11-17 16:40:46,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:40:46,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:40:46,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:46,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:40:46,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=514, Unknown=2, NotChecked=0, Total=600 [2023-11-17 16:40:46,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 454 [2023-11-17 16:40:46,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 880 transitions, 25118 flow. Second operand has 25 states, 25 states have (on average 117.96) internal successors, (2949), 25 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:46,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:46,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 454 [2023-11-17 16:40:46,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:49,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:40:52,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:40:54,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:40:55,421 INFO L124 PetriNetUnfolderBase]: 2749/5143 cut-off events. [2023-11-17 16:40:55,421 INFO L125 PetriNetUnfolderBase]: For 185281/185281 co-relation queries the response was YES. [2023-11-17 16:40:55,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57845 conditions, 5143 events. 2749/5143 cut-off events. For 185281/185281 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 38136 event pairs, 200 based on Foata normal form. 7/5150 useless extension candidates. Maximal degree in co-relation 57726. Up to 4041 conditions per place. [2023-11-17 16:40:55,474 INFO L140 encePairwiseOnDemand]: 445/454 looper letters, 758 selfloop transitions, 283 changer transitions 13/1054 dead transitions. [2023-11-17 16:40:55,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 1054 transitions, 30980 flow [2023-11-17 16:40:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 16:40:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 16:40:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2339 transitions. [2023-11-17 16:40:55,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2711569673081382 [2023-11-17 16:40:55,477 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2339 transitions. [2023-11-17 16:40:55,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2339 transitions. [2023-11-17 16:40:55,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:55,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2339 transitions. [2023-11-17 16:40:55,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 123.10526315789474) internal successors, (2339), 19 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:55,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 454.0) internal successors, (9080), 20 states have internal predecessors, (9080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:55,486 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 454.0) internal successors, (9080), 20 states have internal predecessors, (9080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:55,487 INFO L175 Difference]: Start difference. First operand has 432 places, 880 transitions, 25118 flow. Second operand 19 states and 2339 transitions. [2023-11-17 16:40:55,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 1054 transitions, 30980 flow [2023-11-17 16:40:56,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 1054 transitions, 30106 flow, removed 44 selfloop flow, removed 15 redundant places. [2023-11-17 16:40:56,906 INFO L231 Difference]: Finished difference. Result has 441 places, 965 transitions, 27608 flow [2023-11-17 16:40:56,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=24314, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=27608, PETRI_PLACES=441, PETRI_TRANSITIONS=965} [2023-11-17 16:40:56,906 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 420 predicate places. [2023-11-17 16:40:56,907 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 965 transitions, 27608 flow [2023-11-17 16:40:56,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 117.96) internal successors, (2949), 25 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:56,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:56,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:56,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-17 16:40:57,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:57,108 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:40:57,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:57,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1791594559, now seen corresponding path program 15 times [2023-11-17 16:40:57,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:57,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420989163] [2023-11-17 16:40:57,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:57,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:40:57,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:57,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420989163] [2023-11-17 16:40:57,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420989163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:40:57,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307336924] [2023-11-17 16:40:57,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:40:57,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:57,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:40:57,949 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:40:57,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 16:40:58,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:40:58,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:40:58,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:40:58,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:40:58,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:40:58,270 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 16:40:58,412 INFO L349 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2023-11-17 16:40:58,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 143 [2023-11-17 16:40:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:40:58,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:40:59,048 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:40:59,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 135 [2023-11-17 16:40:59,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:40:59,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2023-11-17 16:40:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:59,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307336924] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:40:59,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:40:59,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 26 [2023-11-17 16:40:59,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16932067] [2023-11-17 16:40:59,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:40:59,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 16:40:59,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:59,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 16:40:59,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=654, Unknown=1, NotChecked=0, Total=756 [2023-11-17 16:40:59,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 454 [2023-11-17 16:40:59,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 965 transitions, 27608 flow. Second operand has 28 states, 28 states have (on average 117.57142857142857) internal successors, (3292), 28 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:59,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:59,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 454 [2023-11-17 16:40:59,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:41:02,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:41:06,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:41:11,724 INFO L124 PetriNetUnfolderBase]: 2817/5285 cut-off events. [2023-11-17 16:41:11,725 INFO L125 PetriNetUnfolderBase]: For 189061/189061 co-relation queries the response was YES. [2023-11-17 16:41:11,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59310 conditions, 5285 events. 2817/5285 cut-off events. For 189061/189061 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 39397 event pairs, 66 based on Foata normal form. 4/5289 useless extension candidates. Maximal degree in co-relation 59186. Up to 2359 conditions per place. [2023-11-17 16:41:11,782 INFO L140 encePairwiseOnDemand]: 442/454 looper letters, 293 selfloop transitions, 826 changer transitions 25/1144 dead transitions. [2023-11-17 16:41:11,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 1144 transitions, 32092 flow [2023-11-17 16:41:11,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 16:41:11,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 16:41:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5005 transitions. [2023-11-17 16:41:11,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2688836359729236 [2023-11-17 16:41:11,786 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5005 transitions. [2023-11-17 16:41:11,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5005 transitions. [2023-11-17 16:41:11,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:41:11,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5005 transitions. [2023-11-17 16:41:11,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 122.07317073170732) internal successors, (5005), 41 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:11,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 454.0) internal successors, (19068), 42 states have internal predecessors, (19068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:11,797 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 454.0) internal successors, (19068), 42 states have internal predecessors, (19068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:11,797 INFO L175 Difference]: Start difference. First operand has 441 places, 965 transitions, 27608 flow. Second operand 41 states and 5005 transitions. [2023-11-17 16:41:11,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 1144 transitions, 32092 flow [2023-11-17 16:41:13,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 1144 transitions, 31949 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-11-17 16:41:13,340 INFO L231 Difference]: Finished difference. Result has 489 places, 1016 transitions, 30672 flow [2023-11-17 16:41:13,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=27473, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=771, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=30672, PETRI_PLACES=489, PETRI_TRANSITIONS=1016} [2023-11-17 16:41:13,341 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 468 predicate places. [2023-11-17 16:41:13,341 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 1016 transitions, 30672 flow [2023-11-17 16:41:13,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 117.57142857142857) internal successors, (3292), 28 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:13,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:41:13,342 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 16:41:13,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-17 16:41:13,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-17 16:41:13,547 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:41:13,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:41:13,548 INFO L85 PathProgramCache]: Analyzing trace with hash 111443128, now seen corresponding path program 2 times [2023-11-17 16:41:13,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:41:13,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50835127] [2023-11-17 16:41:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:41:13,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:41:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:41:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:41:13,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:41:13,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50835127] [2023-11-17 16:41:13,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50835127] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:41:13,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983508437] [2023-11-17 16:41:13,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:41:13,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:41:13,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:41:13,719 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:41:13,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 16:41:13,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:41:13,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:41:13,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 16:41:13,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:41:13,901 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 16:41:13,932 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 16:41:13,966 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 16:41:14,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:41:14,088 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 16:41:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:41:14,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:41:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:41:16,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983508437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:41:16,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:41:16,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 24 [2023-11-17 16:41:16,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440175168] [2023-11-17 16:41:16,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:41:16,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:41:16,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:41:16,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:41:16,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=438, Unknown=1, NotChecked=0, Total=552 [2023-11-17 16:41:16,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 454 [2023-11-17 16:41:16,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 1016 transitions, 30672 flow. Second operand has 24 states, 24 states have (on average 114.91666666666667) internal successors, (2758), 24 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:16,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:41:16,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 454 [2023-11-17 16:41:16,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:41:22,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:41:27,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:41:36,369 INFO L124 PetriNetUnfolderBase]: 3039/5753 cut-off events. [2023-11-17 16:41:36,370 INFO L125 PetriNetUnfolderBase]: For 222235/222235 co-relation queries the response was YES. [2023-11-17 16:41:36,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67828 conditions, 5753 events. 3039/5753 cut-off events. For 222235/222235 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 44184 event pairs, 130 based on Foata normal form. 15/5768 useless extension candidates. Maximal degree in co-relation 67688. Up to 2552 conditions per place. [2023-11-17 16:41:36,467 INFO L140 encePairwiseOnDemand]: 442/454 looper letters, 600 selfloop transitions, 699 changer transitions 16/1315 dead transitions. [2023-11-17 16:41:36,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 1315 transitions, 37530 flow [2023-11-17 16:41:36,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-17 16:41:36,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-11-17 16:41:36,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 6803 transitions. [2023-11-17 16:41:36,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2628873946981992 [2023-11-17 16:41:36,473 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 6803 transitions. [2023-11-17 16:41:36,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 6803 transitions. [2023-11-17 16:41:36,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:41:36,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 6803 transitions. [2023-11-17 16:41:36,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 119.35087719298245) internal successors, (6803), 57 states have internal predecessors, (6803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:36,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 454.0) internal successors, (26332), 58 states have internal predecessors, (26332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:36,496 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 454.0) internal successors, (26332), 58 states have internal predecessors, (26332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:36,497 INFO L175 Difference]: Start difference. First operand has 489 places, 1016 transitions, 30672 flow. Second operand 57 states and 6803 transitions. [2023-11-17 16:41:36,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 1315 transitions, 37530 flow [2023-11-17 16:41:38,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 1315 transitions, 36838 flow, removed 285 selfloop flow, removed 18 redundant places. [2023-11-17 16:41:38,572 INFO L231 Difference]: Finished difference. Result has 540 places, 1091 transitions, 34255 flow [2023-11-17 16:41:38,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=30083, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=34255, PETRI_PLACES=540, PETRI_TRANSITIONS=1091} [2023-11-17 16:41:38,573 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 519 predicate places. [2023-11-17 16:41:38,573 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 1091 transitions, 34255 flow [2023-11-17 16:41:38,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 114.91666666666667) internal successors, (2758), 24 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:38,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:41:38,574 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:41:38,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-17 16:41:38,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:41:38,775 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:41:38,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:41:38,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1632040923, now seen corresponding path program 16 times [2023-11-17 16:41:38,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:41:38,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343751736] [2023-11-17 16:41:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:41:38,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:41:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:41:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:41:39,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:41:39,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343751736] [2023-11-17 16:41:39,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343751736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:41:39,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790688360] [2023-11-17 16:41:39,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:41:39,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:41:39,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:41:39,429 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:41:39,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 16:41:39,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:41:39,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:41:39,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 16:41:39,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:41:39,792 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:41:39,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2023-11-17 16:41:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:41:39,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:41:39,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:41:39,980 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 196 treesize of output 232 [2023-11-17 16:41:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:41:40,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790688360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:41:40,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:41:40,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 21 [2023-11-17 16:41:40,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075606619] [2023-11-17 16:41:40,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:41:40,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 16:41:40,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:41:40,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 16:41:40,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-11-17 16:41:40,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 454 [2023-11-17 16:41:40,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 1091 transitions, 34255 flow. Second operand has 23 states, 23 states have (on average 122.8695652173913) internal successors, (2826), 23 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:40,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:41:40,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 454 [2023-11-17 16:41:40,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:41:44,257 INFO L124 PetriNetUnfolderBase]: 3021/5748 cut-off events. [2023-11-17 16:41:44,257 INFO L125 PetriNetUnfolderBase]: For 223339/223339 co-relation queries the response was YES. [2023-11-17 16:41:44,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69663 conditions, 5748 events. 3021/5748 cut-off events. For 223339/223339 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 44177 event pairs, 157 based on Foata normal form. 6/5754 useless extension candidates. Maximal degree in co-relation 69512. Up to 3903 conditions per place. [2023-11-17 16:41:44,322 INFO L140 encePairwiseOnDemand]: 443/454 looper letters, 747 selfloop transitions, 374 changer transitions 45/1166 dead transitions. [2023-11-17 16:41:44,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 1166 transitions, 37166 flow [2023-11-17 16:41:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:41:44,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:41:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3655 transitions. [2023-11-17 16:41:44,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.277608992860398 [2023-11-17 16:41:44,325 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3655 transitions. [2023-11-17 16:41:44,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3655 transitions. [2023-11-17 16:41:44,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:41:44,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3655 transitions. [2023-11-17 16:41:44,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 126.03448275862068) internal successors, (3655), 29 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:44,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 454.0) internal successors, (13620), 30 states have internal predecessors, (13620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:44,333 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 454.0) internal successors, (13620), 30 states have internal predecessors, (13620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:44,333 INFO L175 Difference]: Start difference. First operand has 540 places, 1091 transitions, 34255 flow. Second operand 29 states and 3655 transitions. [2023-11-17 16:41:44,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 1166 transitions, 37166 flow [2023-11-17 16:41:46,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 1166 transitions, 36193 flow, removed 177 selfloop flow, removed 35 redundant places. [2023-11-17 16:41:46,447 INFO L231 Difference]: Finished difference. Result has 536 places, 1080 transitions, 33714 flow [2023-11-17 16:41:46,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=33295, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=33714, PETRI_PLACES=536, PETRI_TRANSITIONS=1080} [2023-11-17 16:41:46,449 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 515 predicate places. [2023-11-17 16:41:46,449 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 1080 transitions, 33714 flow [2023-11-17 16:41:46,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 122.8695652173913) internal successors, (2826), 23 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:46,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:41:46,449 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:41:46,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-17 16:41:46,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:41:46,657 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:41:46,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:41:46,657 INFO L85 PathProgramCache]: Analyzing trace with hash -786812969, now seen corresponding path program 17 times [2023-11-17 16:41:46,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:41:46,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28578388] [2023-11-17 16:41:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:41:46,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:41:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:41:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:41:47,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:41:47,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28578388] [2023-11-17 16:41:47,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28578388] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:41:47,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135575132] [2023-11-17 16:41:47,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:41:47,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:41:47,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:41:47,334 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:41:47,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 16:41:47,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:41:47,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:41:47,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 16:41:47,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:41:47,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:41:47,600 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 16:41:47,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:41:47,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2023-11-17 16:41:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:41:47,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:41:48,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:41:48,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 135 [2023-11-17 16:41:48,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:41:48,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 61 [2023-11-17 16:41:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:41:48,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135575132] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:41:48,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:41:48,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2023-11-17 16:41:48,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365317449] [2023-11-17 16:41:48,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:41:48,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:41:48,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:41:48,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:41:48,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=561, Unknown=1, NotChecked=0, Total=650 [2023-11-17 16:41:48,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 454 [2023-11-17 16:41:48,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 1080 transitions, 33714 flow. Second operand has 26 states, 26 states have (on average 117.65384615384616) internal successors, (3059), 26 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:48,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:41:48,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 454 [2023-11-17 16:41:48,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:41:53,840 INFO L124 PetriNetUnfolderBase]: 3072/5848 cut-off events. [2023-11-17 16:41:53,840 INFO L125 PetriNetUnfolderBase]: For 243292/243292 co-relation queries the response was YES. [2023-11-17 16:41:53,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71069 conditions, 5848 events. 3072/5848 cut-off events. For 243292/243292 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 45350 event pairs, 171 based on Foata normal form. 3/5851 useless extension candidates. Maximal degree in co-relation 70920. Up to 2766 conditions per place. [2023-11-17 16:41:53,906 INFO L140 encePairwiseOnDemand]: 443/454 looper letters, 676 selfloop transitions, 544 changer transitions 5/1225 dead transitions. [2023-11-17 16:41:53,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1225 transitions, 38334 flow [2023-11-17 16:41:53,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 16:41:53,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 16:41:53,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4033 transitions. [2023-11-17 16:41:53,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2691896942998265 [2023-11-17 16:41:53,910 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4033 transitions. [2023-11-17 16:41:53,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4033 transitions. [2023-11-17 16:41:53,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:41:53,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4033 transitions. [2023-11-17 16:41:53,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 122.21212121212122) internal successors, (4033), 33 states have internal predecessors, (4033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:53,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 454.0) internal successors, (15436), 34 states have internal predecessors, (15436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:53,923 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 454.0) internal successors, (15436), 34 states have internal predecessors, (15436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:53,923 INFO L175 Difference]: Start difference. First operand has 536 places, 1080 transitions, 33714 flow. Second operand 33 states and 4033 transitions. [2023-11-17 16:41:53,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1225 transitions, 38334 flow [2023-11-17 16:41:55,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1225 transitions, 37251 flow, removed 71 selfloop flow, removed 17 redundant places. [2023-11-17 16:41:56,000 INFO L231 Difference]: Finished difference. Result has 542 places, 1118 transitions, 35750 flow [2023-11-17 16:41:56,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=32690, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1080, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=507, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=35750, PETRI_PLACES=542, PETRI_TRANSITIONS=1118} [2023-11-17 16:41:56,001 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 521 predicate places. [2023-11-17 16:41:56,001 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 1118 transitions, 35750 flow [2023-11-17 16:41:56,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 117.65384615384616) internal successors, (3059), 26 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:56,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:41:56,002 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:41:56,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-17 16:41:56,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:41:56,202 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:41:56,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:41:56,203 INFO L85 PathProgramCache]: Analyzing trace with hash -400856646, now seen corresponding path program 18 times [2023-11-17 16:41:56,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:41:56,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212233461] [2023-11-17 16:41:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:41:56,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:41:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:41:56,390 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 16:41:56,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:41:56,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212233461] [2023-11-17 16:41:56,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212233461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:41:56,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699783395] [2023-11-17 16:41:56,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:41:56,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:41:56,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:41:56,393 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:41:56,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 16:41:56,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:41:56,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:41:56,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 16:41:56,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:41:56,626 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 16:41:56,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:41:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:41:56,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699783395] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:41:56,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:41:56,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2023-11-17 16:41:56,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935822164] [2023-11-17 16:41:56,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:41:56,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:41:56,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:41:56,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:41:56,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:41:56,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:41:56,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 1118 transitions, 35750 flow. Second operand has 17 states, 17 states have (on average 171.05882352941177) internal successors, (2908), 17 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:56,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:41:56,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:41:56,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:42:00,033 INFO L124 PetriNetUnfolderBase]: 3114/5971 cut-off events. [2023-11-17 16:42:00,033 INFO L125 PetriNetUnfolderBase]: For 258700/258700 co-relation queries the response was YES. [2023-11-17 16:42:00,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72661 conditions, 5971 events. 3114/5971 cut-off events. For 258700/258700 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 46145 event pairs, 378 based on Foata normal form. 172/6143 useless extension candidates. Maximal degree in co-relation 72511. Up to 2639 conditions per place. [2023-11-17 16:42:00,099 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 783 selfloop transitions, 454 changer transitions 3/1240 dead transitions. [2023-11-17 16:42:00,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1240 transitions, 40143 flow [2023-11-17 16:42:00,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:42:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:42:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3176 transitions. [2023-11-17 16:42:00,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3886441507586882 [2023-11-17 16:42:00,102 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3176 transitions. [2023-11-17 16:42:00,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3176 transitions. [2023-11-17 16:42:00,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:42:00,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3176 transitions. [2023-11-17 16:42:00,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 176.44444444444446) internal successors, (3176), 18 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:00,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 454.0) internal successors, (8626), 19 states have internal predecessors, (8626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:00,108 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 454.0) internal successors, (8626), 19 states have internal predecessors, (8626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:00,108 INFO L175 Difference]: Start difference. First operand has 542 places, 1118 transitions, 35750 flow. Second operand 18 states and 3176 transitions. [2023-11-17 16:42:00,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1240 transitions, 40143 flow [2023-11-17 16:42:02,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 1240 transitions, 39736 flow, removed 61 selfloop flow, removed 26 redundant places. [2023-11-17 16:42:02,331 INFO L231 Difference]: Finished difference. Result has 532 places, 1096 transitions, 35480 flow [2023-11-17 16:42:02,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=32784, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=35480, PETRI_PLACES=532, PETRI_TRANSITIONS=1096} [2023-11-17 16:42:02,332 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 511 predicate places. [2023-11-17 16:42:02,332 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 1096 transitions, 35480 flow [2023-11-17 16:42:02,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 171.05882352941177) internal successors, (2908), 17 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:02,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:42:02,333 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:42:02,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-17 16:42:02,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-17 16:42:02,533 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:42:02,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:42:02,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1753957744, now seen corresponding path program 19 times [2023-11-17 16:42:02,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:42:02,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506578827] [2023-11-17 16:42:02,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:42:02,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:42:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:42:03,654 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 16:42:03,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:42:03,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506578827] [2023-11-17 16:42:03,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506578827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:42:03,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625106250] [2023-11-17 16:42:03,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:42:03,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:42:03,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:42:03,657 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:42:03,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 16:42:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:42:03,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 16:42:03,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:42:04,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:42:04,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2023-11-17 16:42:04,081 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 16:42:04,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:42:04,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:42:04,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 159 [2023-11-17 16:42:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:42:05,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625106250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:42:05,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:42:05,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 24 [2023-11-17 16:42:05,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776924741] [2023-11-17 16:42:05,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:42:05,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:42:05,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:42:05,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:42:05,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:42:05,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 454 [2023-11-17 16:42:05,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1096 transitions, 35480 flow. Second operand has 26 states, 26 states have (on average 114.73076923076923) internal successors, (2983), 26 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:05,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:42:05,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 454 [2023-11-17 16:42:05,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:42:09,612 INFO L124 PetriNetUnfolderBase]: 3202/6126 cut-off events. [2023-11-17 16:42:09,612 INFO L125 PetriNetUnfolderBase]: For 256332/256332 co-relation queries the response was YES. [2023-11-17 16:42:09,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75877 conditions, 6126 events. 3202/6126 cut-off events. For 256332/256332 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 47469 event pairs, 186 based on Foata normal form. 4/6130 useless extension candidates. Maximal degree in co-relation 75730. Up to 3828 conditions per place. [2023-11-17 16:42:09,685 INFO L140 encePairwiseOnDemand]: 442/454 looper letters, 767 selfloop transitions, 423 changer transitions 17/1207 dead transitions. [2023-11-17 16:42:09,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1207 transitions, 39459 flow [2023-11-17 16:42:09,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 16:42:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 16:42:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3883 transitions. [2023-11-17 16:42:09,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2591776798825257 [2023-11-17 16:42:09,691 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3883 transitions. [2023-11-17 16:42:09,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3883 transitions. [2023-11-17 16:42:09,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:42:09,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3883 transitions. [2023-11-17 16:42:09,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 117.66666666666667) internal successors, (3883), 33 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:09,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 454.0) internal successors, (15436), 34 states have internal predecessors, (15436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:09,701 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 454.0) internal successors, (15436), 34 states have internal predecessors, (15436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:09,701 INFO L175 Difference]: Start difference. First operand has 532 places, 1096 transitions, 35480 flow. Second operand 33 states and 3883 transitions. [2023-11-17 16:42:09,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1207 transitions, 39459 flow [2023-11-17 16:42:12,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1207 transitions, 38794 flow, removed 100 selfloop flow, removed 11 redundant places. [2023-11-17 16:42:12,114 INFO L231 Difference]: Finished difference. Result has 562 places, 1128 transitions, 36968 flow [2023-11-17 16:42:12,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=34868, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1096, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=36968, PETRI_PLACES=562, PETRI_TRANSITIONS=1128} [2023-11-17 16:42:12,115 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 541 predicate places. [2023-11-17 16:42:12,115 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 1128 transitions, 36968 flow [2023-11-17 16:42:12,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 114.73076923076923) internal successors, (2983), 26 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:12,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:42:12,116 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 16:42:12,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-17 16:42:12,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-17 16:42:12,321 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:42:12,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:42:12,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1088772971, now seen corresponding path program 3 times [2023-11-17 16:42:12,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:42:12,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810033578] [2023-11-17 16:42:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:42:12,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:42:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:42:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:42:12,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:42:12,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810033578] [2023-11-17 16:42:12,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810033578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:42:12,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621490888] [2023-11-17 16:42:12,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:42:12,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:42:12,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:42:12,469 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:42:12,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 16:42:12,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:42:12,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:42:12,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 16:42:12,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:42:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:42:12,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:42:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:42:12,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621490888] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:42:12,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:42:12,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 16:42:12,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841116853] [2023-11-17 16:42:12,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:42:12,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:42:12,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:42:12,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:42:12,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:42:12,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:42:12,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 1128 transitions, 36968 flow. Second operand has 13 states, 13 states have (on average 171.3846153846154) internal successors, (2228), 13 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:12,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:42:12,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:42:12,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:42:15,548 INFO L124 PetriNetUnfolderBase]: 2968/5764 cut-off events. [2023-11-17 16:42:15,549 INFO L125 PetriNetUnfolderBase]: For 276167/276167 co-relation queries the response was YES. [2023-11-17 16:42:15,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72026 conditions, 5764 events. 2968/5764 cut-off events. For 276167/276167 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 44845 event pairs, 463 based on Foata normal form. 112/5876 useless extension candidates. Maximal degree in co-relation 71872. Up to 2597 conditions per place. [2023-11-17 16:42:15,614 INFO L140 encePairwiseOnDemand]: 447/454 looper letters, 724 selfloop transitions, 448 changer transitions 16/1188 dead transitions. [2023-11-17 16:42:15,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 1188 transitions, 39768 flow [2023-11-17 16:42:15,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:42:15,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:42:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1949 transitions. [2023-11-17 16:42:15,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39026832198638367 [2023-11-17 16:42:15,616 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1949 transitions. [2023-11-17 16:42:15,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1949 transitions. [2023-11-17 16:42:15,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:42:15,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1949 transitions. [2023-11-17 16:42:15,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 177.1818181818182) internal successors, (1949), 11 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:15,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 454.0) internal successors, (5448), 12 states have internal predecessors, (5448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:15,619 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 454.0) internal successors, (5448), 12 states have internal predecessors, (5448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:15,619 INFO L175 Difference]: Start difference. First operand has 562 places, 1128 transitions, 36968 flow. Second operand 11 states and 1949 transitions. [2023-11-17 16:42:15,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 1188 transitions, 39768 flow [2023-11-17 16:42:17,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 1188 transitions, 39157 flow, removed 68 selfloop flow, removed 14 redundant places. [2023-11-17 16:42:17,808 INFO L231 Difference]: Finished difference. Result has 560 places, 1112 transitions, 36990 flow [2023-11-17 16:42:17,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=35552, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=36990, PETRI_PLACES=560, PETRI_TRANSITIONS=1112} [2023-11-17 16:42:17,809 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 539 predicate places. [2023-11-17 16:42:17,809 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 1112 transitions, 36990 flow [2023-11-17 16:42:17,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.3846153846154) internal successors, (2228), 13 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:17,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:42:17,810 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 16:42:17,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-17 16:42:18,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:42:18,010 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:42:18,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:42:18,011 INFO L85 PathProgramCache]: Analyzing trace with hash -237998675, now seen corresponding path program 4 times [2023-11-17 16:42:18,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:42:18,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975745909] [2023-11-17 16:42:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:42:18,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:42:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:42:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:42:18,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:42:18,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975745909] [2023-11-17 16:42:18,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975745909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:42:18,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148385051] [2023-11-17 16:42:18,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:42:18,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:42:18,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:42:18,153 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:42:18,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 16:42:18,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:42:18,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:42:18,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 16:42:18,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:42:18,390 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 16:42:18,418 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 16:42:18,455 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 16:42:18,483 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 16:42:18,806 INFO L349 Elim1Store]: treesize reduction 52, result has 40.2 percent of original size [2023-11-17 16:42:18,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 262 treesize of output 197 [2023-11-17 16:42:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:42:19,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:42:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:42:20,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148385051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:42:20,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:42:20,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 8] total 25 [2023-11-17 16:42:20,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564486998] [2023-11-17 16:42:20,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:42:20,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:42:20,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:42:20,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:42:20,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:42:20,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 454 [2023-11-17 16:42:20,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 1112 transitions, 36990 flow. Second operand has 25 states, 25 states have (on average 114.76) internal successors, (2869), 25 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:20,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:42:20,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 454 [2023-11-17 16:42:20,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:42:32,737 INFO L124 PetriNetUnfolderBase]: 3268/6131 cut-off events. [2023-11-17 16:42:32,737 INFO L125 PetriNetUnfolderBase]: For 300551/300551 co-relation queries the response was YES. [2023-11-17 16:42:32,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80218 conditions, 6131 events. 3268/6131 cut-off events. For 300551/300551 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 46588 event pairs, 181 based on Foata normal form. 51/6182 useless extension candidates. Maximal degree in co-relation 80062. Up to 2837 conditions per place. [2023-11-17 16:42:32,811 INFO L140 encePairwiseOnDemand]: 442/454 looper letters, 677 selfloop transitions, 752 changer transitions 5/1434 dead transitions. [2023-11-17 16:42:32,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 1434 transitions, 46194 flow [2023-11-17 16:42:32,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-17 16:42:32,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-11-17 16:42:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 5979 transitions. [2023-11-17 16:42:32,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2633920704845815 [2023-11-17 16:42:32,816 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 5979 transitions. [2023-11-17 16:42:32,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 5979 transitions. [2023-11-17 16:42:32,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:42:32,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 5979 transitions. [2023-11-17 16:42:32,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 119.58) internal successors, (5979), 50 states have internal predecessors, (5979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:32,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 454.0) internal successors, (23154), 51 states have internal predecessors, (23154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:32,830 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 454.0) internal successors, (23154), 51 states have internal predecessors, (23154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:32,830 INFO L175 Difference]: Start difference. First operand has 560 places, 1112 transitions, 36990 flow. Second operand 50 states and 5979 transitions. [2023-11-17 16:42:32,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 1434 transitions, 46194 flow [2023-11-17 16:42:35,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 1434 transitions, 45374 flow, removed 33 selfloop flow, removed 7 redundant places. [2023-11-17 16:42:35,599 INFO L231 Difference]: Finished difference. Result has 613 places, 1236 transitions, 42401 flow [2023-11-17 16:42:35,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=35993, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=649, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=42401, PETRI_PLACES=613, PETRI_TRANSITIONS=1236} [2023-11-17 16:42:35,600 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 592 predicate places. [2023-11-17 16:42:35,600 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 1236 transitions, 42401 flow [2023-11-17 16:42:35,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 114.76) internal successors, (2869), 25 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:35,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:42:35,601 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 16:42:35,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-17 16:42:35,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-17 16:42:35,801 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:42:35,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:42:35,802 INFO L85 PathProgramCache]: Analyzing trace with hash -497903822, now seen corresponding path program 5 times [2023-11-17 16:42:35,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:42:35,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036735482] [2023-11-17 16:42:35,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:42:35,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:42:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:42:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:42:35,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:42:35,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036735482] [2023-11-17 16:42:35,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036735482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:42:35,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711455651] [2023-11-17 16:42:35,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:42:35,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:42:35,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:42:35,998 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:42:36,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 16:42:36,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:42:36,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:42:36,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 16:42:36,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:42:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:42:36,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:42:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:42:36,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711455651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:42:36,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:42:36,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-17 16:42:36,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936271517] [2023-11-17 16:42:36,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:42:36,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 16:42:36,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:42:36,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 16:42:36,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-11-17 16:42:36,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:42:36,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 1236 transitions, 42401 flow. Second operand has 16 states, 16 states have (on average 171.0) internal successors, (2736), 16 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:36,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:42:36,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:42:36,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:42:42,892 INFO L124 PetriNetUnfolderBase]: 3291/6177 cut-off events. [2023-11-17 16:42:42,893 INFO L125 PetriNetUnfolderBase]: For 309870/309870 co-relation queries the response was YES. [2023-11-17 16:42:42,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83065 conditions, 6177 events. 3291/6177 cut-off events. For 309870/309870 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 47188 event pairs, 302 based on Foata normal form. 28/6205 useless extension candidates. Maximal degree in co-relation 82897. Up to 2842 conditions per place. [2023-11-17 16:42:42,974 INFO L140 encePairwiseOnDemand]: 447/454 looper letters, 687 selfloop transitions, 754 changer transitions 7/1448 dead transitions. [2023-11-17 16:42:42,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 1448 transitions, 48507 flow [2023-11-17 16:42:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 16:42:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 16:42:42,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6312 transitions. [2023-11-17 16:42:42,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38619676945668135 [2023-11-17 16:42:42,978 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6312 transitions. [2023-11-17 16:42:42,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6312 transitions. [2023-11-17 16:42:42,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:42:42,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6312 transitions. [2023-11-17 16:42:42,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 175.33333333333334) internal successors, (6312), 36 states have internal predecessors, (6312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:42,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 454.0) internal successors, (16798), 37 states have internal predecessors, (16798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:42,989 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 454.0) internal successors, (16798), 37 states have internal predecessors, (16798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:42,989 INFO L175 Difference]: Start difference. First operand has 613 places, 1236 transitions, 42401 flow. Second operand 36 states and 6312 transitions. [2023-11-17 16:42:42,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 1448 transitions, 48507 flow [2023-11-17 16:42:46,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 628 places, 1448 transitions, 47470 flow, removed 273 selfloop flow, removed 20 redundant places. [2023-11-17 16:42:46,043 INFO L231 Difference]: Finished difference. Result has 637 places, 1274 transitions, 44816 flow [2023-11-17 16:42:46,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=41345, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=716, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=44816, PETRI_PLACES=637, PETRI_TRANSITIONS=1274} [2023-11-17 16:42:46,044 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 616 predicate places. [2023-11-17 16:42:46,045 INFO L495 AbstractCegarLoop]: Abstraction has has 637 places, 1274 transitions, 44816 flow [2023-11-17 16:42:46,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 171.0) internal successors, (2736), 16 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:46,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:42:46,045 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:42:46,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-17 16:42:46,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 16:42:46,253 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:42:46,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:42:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash -645048389, now seen corresponding path program 11 times [2023-11-17 16:42:46,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:42:46,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257246756] [2023-11-17 16:42:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:42:46,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:42:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:42:46,421 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 16:42:46,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:42:46,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257246756] [2023-11-17 16:42:46,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257246756] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:42:46,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697870955] [2023-11-17 16:42:46,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:42:46,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:42:46,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:42:46,422 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:42:46,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 16:42:46,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:42:46,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:42:46,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 16:42:46,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:42:46,704 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 16:42:46,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:42:46,929 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 16:42:46,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697870955] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:42:46,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:42:46,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-17 16:42:46,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620646605] [2023-11-17 16:42:46,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:42:46,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:42:46,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:42:46,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:42:46,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:42:46,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:42:46,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 637 places, 1274 transitions, 44816 flow. Second operand has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:46,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:42:46,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:42:46,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:42:49,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:42:53,660 INFO L124 PetriNetUnfolderBase]: 3305/6232 cut-off events. [2023-11-17 16:42:53,660 INFO L125 PetriNetUnfolderBase]: For 334851/334851 co-relation queries the response was YES. [2023-11-17 16:42:53,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84699 conditions, 6232 events. 3305/6232 cut-off events. For 334851/334851 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 47780 event pairs, 514 based on Foata normal form. 48/6280 useless extension candidates. Maximal degree in co-relation 84521. Up to 2862 conditions per place. [2023-11-17 16:42:53,743 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 879 selfloop transitions, 527 changer transitions 0/1406 dead transitions. [2023-11-17 16:42:53,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 1406 transitions, 48737 flow [2023-11-17 16:42:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 16:42:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 16:42:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5599 transitions. [2023-11-17 16:42:53,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38539372246696035 [2023-11-17 16:42:53,747 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5599 transitions. [2023-11-17 16:42:53,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5599 transitions. [2023-11-17 16:42:53,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:42:53,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5599 transitions. [2023-11-17 16:42:53,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 174.96875) internal successors, (5599), 32 states have internal predecessors, (5599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:53,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 454.0) internal successors, (14982), 33 states have internal predecessors, (14982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:53,756 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 454.0) internal successors, (14982), 33 states have internal predecessors, (14982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:53,756 INFO L175 Difference]: Start difference. First operand has 637 places, 1274 transitions, 44816 flow. Second operand 32 states and 5599 transitions. [2023-11-17 16:42:53,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 1406 transitions, 48737 flow [2023-11-17 16:42:56,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 657 places, 1406 transitions, 48262 flow, removed 90 selfloop flow, removed 11 redundant places. [2023-11-17 16:42:56,990 INFO L231 Difference]: Finished difference. Result has 661 places, 1285 transitions, 45807 flow [2023-11-17 16:42:56,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=44219, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=514, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=45807, PETRI_PLACES=661, PETRI_TRANSITIONS=1285} [2023-11-17 16:42:56,992 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 640 predicate places. [2023-11-17 16:42:56,992 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 1285 transitions, 45807 flow [2023-11-17 16:42:56,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:56,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:42:56,992 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 16:42:56,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-17 16:42:57,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 16:42:57,198 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:42:57,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:42:57,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1625853988, now seen corresponding path program 6 times [2023-11-17 16:42:57,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:42:57,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750139159] [2023-11-17 16:42:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:42:57,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:42:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:42:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:42:57,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:42:57,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750139159] [2023-11-17 16:42:57,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750139159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:42:57,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303921762] [2023-11-17 16:42:57,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:42:57,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:42:57,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:42:57,354 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:42:57,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 16:42:57,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:42:57,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:42:57,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:42:57,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:42:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:42:57,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:42:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:42:57,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303921762] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:42:57,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:42:57,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 16:42:57,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756317755] [2023-11-17 16:42:57,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:42:57,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:42:57,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:42:57,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:42:57,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:42:57,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:42:57,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 1285 transitions, 45807 flow. Second operand has 18 states, 18 states have (on average 170.88888888888889) internal successors, (3076), 18 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:57,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:42:57,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:42:57,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:43:02,881 INFO L124 PetriNetUnfolderBase]: 3462/6465 cut-off events. [2023-11-17 16:43:02,881 INFO L125 PetriNetUnfolderBase]: For 362697/362697 co-relation queries the response was YES. [2023-11-17 16:43:02,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90057 conditions, 6465 events. 3462/6465 cut-off events. For 362697/362697 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 49316 event pairs, 545 based on Foata normal form. 36/6501 useless extension candidates. Maximal degree in co-relation 89875. Up to 2941 conditions per place. [2023-11-17 16:43:02,969 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 883 selfloop transitions, 603 changer transitions 0/1486 dead transitions. [2023-11-17 16:43:02,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 1486 transitions, 52725 flow [2023-11-17 16:43:02,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 16:43:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 16:43:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6456 transitions. [2023-11-17 16:43:02,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38433146803190854 [2023-11-17 16:43:02,973 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6456 transitions. [2023-11-17 16:43:02,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6456 transitions. [2023-11-17 16:43:02,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:43:02,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6456 transitions. [2023-11-17 16:43:02,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 174.48648648648648) internal successors, (6456), 37 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:02,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 454.0) internal successors, (17252), 38 states have internal predecessors, (17252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:02,984 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 454.0) internal successors, (17252), 38 states have internal predecessors, (17252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:02,984 INFO L175 Difference]: Start difference. First operand has 661 places, 1285 transitions, 45807 flow. Second operand 37 states and 6456 transitions. [2023-11-17 16:43:02,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 1486 transitions, 52725 flow [2023-11-17 16:43:06,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 1486 transitions, 51881 flow, removed 57 selfloop flow, removed 16 redundant places. [2023-11-17 16:43:06,674 INFO L231 Difference]: Finished difference. Result has 693 places, 1364 transitions, 49782 flow [2023-11-17 16:43:06,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=44897, PETRI_DIFFERENCE_MINUEND_PLACES=645, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=718, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=49782, PETRI_PLACES=693, PETRI_TRANSITIONS=1364} [2023-11-17 16:43:06,676 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 672 predicate places. [2023-11-17 16:43:06,676 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 1364 transitions, 49782 flow [2023-11-17 16:43:06,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 170.88888888888889) internal successors, (3076), 18 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:06,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:43:06,677 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:43:06,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-17 16:43:06,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:06,886 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:43:06,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:43:06,886 INFO L85 PathProgramCache]: Analyzing trace with hash 110861008, now seen corresponding path program 20 times [2023-11-17 16:43:06,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:43:06,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027412594] [2023-11-17 16:43:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:43:06,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:43:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:07,025 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 16:43:07,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:43:07,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027412594] [2023-11-17 16:43:07,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027412594] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:43:07,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073679315] [2023-11-17 16:43:07,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:43:07,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:07,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:43:07,026 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:43:07,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 16:43:07,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:43:07,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:43:07,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:43:07,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:43:07,248 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 16:43:07,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:43:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:07,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073679315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:43:07,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:43:07,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-11-17 16:43:07,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899098380] [2023-11-17 16:43:07,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:43:07,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:43:07,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:43:07,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:43:07,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:43:07,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:43:07,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 1364 transitions, 49782 flow. Second operand has 14 states, 14 states have (on average 171.42857142857142) internal successors, (2400), 14 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:07,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:43:07,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:43:07,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:43:11,874 INFO L124 PetriNetUnfolderBase]: 3510/6627 cut-off events. [2023-11-17 16:43:11,874 INFO L125 PetriNetUnfolderBase]: For 380963/380963 co-relation queries the response was YES. [2023-11-17 16:43:11,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93906 conditions, 6627 events. 3510/6627 cut-off events. For 380963/380963 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 51474 event pairs, 479 based on Foata normal form. 48/6675 useless extension candidates. Maximal degree in co-relation 93713. Up to 3546 conditions per place. [2023-11-17 16:43:11,966 INFO L140 encePairwiseOnDemand]: 447/454 looper letters, 820 selfloop transitions, 625 changer transitions 0/1445 dead transitions. [2023-11-17 16:43:11,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 1445 transitions, 53989 flow [2023-11-17 16:43:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:43:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:43:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3161 transitions. [2023-11-17 16:43:11,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3868086147821831 [2023-11-17 16:43:11,969 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3161 transitions. [2023-11-17 16:43:11,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3161 transitions. [2023-11-17 16:43:11,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:43:11,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3161 transitions. [2023-11-17 16:43:11,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 175.61111111111111) internal successors, (3161), 18 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:11,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 454.0) internal successors, (8626), 19 states have internal predecessors, (8626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:11,975 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 454.0) internal successors, (8626), 19 states have internal predecessors, (8626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:11,975 INFO L175 Difference]: Start difference. First operand has 693 places, 1364 transitions, 49782 flow. Second operand 18 states and 3161 transitions. [2023-11-17 16:43:11,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 1445 transitions, 53989 flow [2023-11-17 16:43:16,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 1445 transitions, 53083 flow, removed 199 selfloop flow, removed 18 redundant places. [2023-11-17 16:43:16,096 INFO L231 Difference]: Finished difference. Result has 695 places, 1382 transitions, 51708 flow [2023-11-17 16:43:16,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=48074, PETRI_DIFFERENCE_MINUEND_PLACES=675, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=747, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=51708, PETRI_PLACES=695, PETRI_TRANSITIONS=1382} [2023-11-17 16:43:16,098 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 674 predicate places. [2023-11-17 16:43:16,098 INFO L495 AbstractCegarLoop]: Abstraction has has 695 places, 1382 transitions, 51708 flow [2023-11-17 16:43:16,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 171.42857142857142) internal successors, (2400), 14 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:16,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:43:16,099 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:43:16,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-17 16:43:16,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:16,307 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:43:16,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:43:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash -919710634, now seen corresponding path program 21 times [2023-11-17 16:43:16,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:43:16,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022255317] [2023-11-17 16:43:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:43:16,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:43:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:16,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:43:16,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022255317] [2023-11-17 16:43:16,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022255317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:43:16,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603729213] [2023-11-17 16:43:16,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:43:16,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:16,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:43:16,415 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:43:16,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-17 16:43:16,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:43:16,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:43:16,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-17 16:43:16,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:43:16,642 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 16:43:16,672 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 16:43:16,723 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 16:43:16,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:43:16,826 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 16:43:17,128 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-17 16:43:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:43:17,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:43:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:18,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603729213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:43:18,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:43:18,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 24 [2023-11-17 16:43:18,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870687210] [2023-11-17 16:43:18,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:43:18,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:43:18,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:43:18,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:43:18,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=433, Unknown=1, NotChecked=0, Total=552 [2023-11-17 16:43:18,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 454 [2023-11-17 16:43:18,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 695 places, 1382 transitions, 51708 flow. Second operand has 24 states, 24 states have (on average 114.91666666666667) internal successors, (2758), 24 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:18,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:43:18,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 454 [2023-11-17 16:43:18,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:43:26,266 INFO L124 PetriNetUnfolderBase]: 3593/6789 cut-off events. [2023-11-17 16:43:26,267 INFO L125 PetriNetUnfolderBase]: For 420768/420768 co-relation queries the response was YES. [2023-11-17 16:43:26,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98058 conditions, 6789 events. 3593/6789 cut-off events. For 420768/420768 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 52900 event pairs, 426 based on Foata normal form. 18/6807 useless extension candidates. Maximal degree in co-relation 97865. Up to 3112 conditions per place. [2023-11-17 16:43:26,360 INFO L140 encePairwiseOnDemand]: 443/454 looper letters, 828 selfloop transitions, 728 changer transitions 16/1572 dead transitions. [2023-11-17 16:43:26,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 1572 transitions, 58693 flow [2023-11-17 16:43:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-17 16:43:26,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-11-17 16:43:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 6276 transitions. [2023-11-17 16:43:26,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26082619898595294 [2023-11-17 16:43:26,365 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 6276 transitions. [2023-11-17 16:43:26,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 6276 transitions. [2023-11-17 16:43:26,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:43:26,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 6276 transitions. [2023-11-17 16:43:26,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 118.41509433962264) internal successors, (6276), 53 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:26,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 454.0) internal successors, (24516), 54 states have internal predecessors, (24516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:26,380 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 454.0) internal successors, (24516), 54 states have internal predecessors, (24516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:26,380 INFO L175 Difference]: Start difference. First operand has 695 places, 1382 transitions, 51708 flow. Second operand 53 states and 6276 transitions. [2023-11-17 16:43:26,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 744 places, 1572 transitions, 58693 flow [2023-11-17 16:43:30,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 733 places, 1572 transitions, 58306 flow, removed 52 selfloop flow, removed 11 redundant places. [2023-11-17 16:43:30,740 INFO L231 Difference]: Finished difference. Result has 742 places, 1402 transitions, 54240 flow [2023-11-17 16:43:30,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=50778, PETRI_DIFFERENCE_MINUEND_PLACES=681, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=676, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=54240, PETRI_PLACES=742, PETRI_TRANSITIONS=1402} [2023-11-17 16:43:30,741 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 721 predicate places. [2023-11-17 16:43:30,741 INFO L495 AbstractCegarLoop]: Abstraction has has 742 places, 1402 transitions, 54240 flow [2023-11-17 16:43:30,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 114.91666666666667) internal successors, (2758), 24 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:30,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:43:30,742 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:43:30,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-17 16:43:30,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-17 16:43:30,942 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:43:30,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:43:30,942 INFO L85 PathProgramCache]: Analyzing trace with hash -243295841, now seen corresponding path program 12 times [2023-11-17 16:43:30,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:43:30,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651209441] [2023-11-17 16:43:30,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:43:30,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:43:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:31,122 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 16:43:31,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:43:31,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651209441] [2023-11-17 16:43:31,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651209441] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:43:31,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365227284] [2023-11-17 16:43:31,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:43:31,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:31,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:43:31,125 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:43:31,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-17 16:43:31,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:43:31,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:43:31,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:43:31,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:43:31,409 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 16:43:31,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:43:31,522 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 16:43:31,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365227284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:43:31,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:43:31,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-17 16:43:31,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624565999] [2023-11-17 16:43:31,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:43:31,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:43:31,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:43:31,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:43:31,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:43:31,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:43:31,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 742 places, 1402 transitions, 54240 flow. Second operand has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:31,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:43:31,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:43:31,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:43:36,763 INFO L124 PetriNetUnfolderBase]: 3591/6811 cut-off events. [2023-11-17 16:43:36,763 INFO L125 PetriNetUnfolderBase]: For 417280/417280 co-relation queries the response was YES. [2023-11-17 16:43:36,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100218 conditions, 6811 events. 3591/6811 cut-off events. For 417280/417280 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 53237 event pairs, 707 based on Foata normal form. 40/6851 useless extension candidates. Maximal degree in co-relation 100020. Up to 4140 conditions per place. [2023-11-17 16:43:36,864 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 904 selfloop transitions, 593 changer transitions 1/1498 dead transitions. [2023-11-17 16:43:36,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 758 places, 1498 transitions, 58483 flow [2023-11-17 16:43:36,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:43:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:43:36,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3835 transitions. [2023-11-17 16:43:36,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3839607529034842 [2023-11-17 16:43:36,866 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3835 transitions. [2023-11-17 16:43:36,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3835 transitions. [2023-11-17 16:43:36,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:43:36,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3835 transitions. [2023-11-17 16:43:36,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 174.3181818181818) internal successors, (3835), 22 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:36,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 454.0) internal successors, (10442), 23 states have internal predecessors, (10442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:36,873 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 454.0) internal successors, (10442), 23 states have internal predecessors, (10442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:36,873 INFO L175 Difference]: Start difference. First operand has 742 places, 1402 transitions, 54240 flow. Second operand 22 states and 3835 transitions. [2023-11-17 16:43:36,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 758 places, 1498 transitions, 58483 flow [2023-11-17 16:43:41,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 733 places, 1498 transitions, 57134 flow, removed 136 selfloop flow, removed 25 redundant places. [2023-11-17 16:43:41,532 INFO L231 Difference]: Finished difference. Result has 739 places, 1415 transitions, 54470 flow [2023-11-17 16:43:41,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=52805, PETRI_DIFFERENCE_MINUEND_PLACES=712, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=581, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=54470, PETRI_PLACES=739, PETRI_TRANSITIONS=1415} [2023-11-17 16:43:41,533 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 718 predicate places. [2023-11-17 16:43:41,533 INFO L495 AbstractCegarLoop]: Abstraction has has 739 places, 1415 transitions, 54470 flow [2023-11-17 16:43:41,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:41,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:43:41,534 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:43:41,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-17 16:43:41,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-17 16:43:41,734 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:43:41,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:43:41,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2080678294, now seen corresponding path program 22 times [2023-11-17 16:43:41,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:43:41,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461799587] [2023-11-17 16:43:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:43:41,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:43:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:41,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:43:41,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461799587] [2023-11-17 16:43:41,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461799587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:43:41,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461766895] [2023-11-17 16:43:41,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:43:41,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:41,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:43:41,910 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:43:41,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-17 16:43:42,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:43:42,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:43:42,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 16:43:42,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:43:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:42,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:43:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:42,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461766895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:43:42,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:43:42,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-11-17 16:43:42,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138896902] [2023-11-17 16:43:42,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:43:42,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:43:42,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:43:42,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:43:42,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:43:42,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:43:42,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 1415 transitions, 54470 flow. Second operand has 14 states, 14 states have (on average 171.42857142857142) internal successors, (2400), 14 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:42,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:43:42,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:43:42,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:43:46,299 INFO L124 PetriNetUnfolderBase]: 3574/6772 cut-off events. [2023-11-17 16:43:46,299 INFO L125 PetriNetUnfolderBase]: For 417523/417523 co-relation queries the response was YES. [2023-11-17 16:43:46,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99686 conditions, 6772 events. 3574/6772 cut-off events. For 417523/417523 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 52947 event pairs, 450 based on Foata normal form. 10/6782 useless extension candidates. Maximal degree in co-relation 99489. Up to 3089 conditions per place. [2023-11-17 16:43:46,399 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 923 selfloop transitions, 544 changer transitions 9/1476 dead transitions. [2023-11-17 16:43:46,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 758 places, 1476 transitions, 58373 flow [2023-11-17 16:43:46,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:43:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:43:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3498 transitions. [2023-11-17 16:43:46,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38524229074889865 [2023-11-17 16:43:46,401 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3498 transitions. [2023-11-17 16:43:46,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3498 transitions. [2023-11-17 16:43:46,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:43:46,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3498 transitions. [2023-11-17 16:43:46,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 174.9) internal successors, (3498), 20 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:46,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 454.0) internal successors, (9534), 21 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:46,407 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 454.0) internal successors, (9534), 21 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:46,407 INFO L175 Difference]: Start difference. First operand has 739 places, 1415 transitions, 54470 flow. Second operand 20 states and 3498 transitions. [2023-11-17 16:43:46,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 758 places, 1476 transitions, 58373 flow [2023-11-17 16:43:51,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 750 places, 1476 transitions, 57724 flow, removed 120 selfloop flow, removed 8 redundant places. [2023-11-17 16:43:51,361 INFO L231 Difference]: Finished difference. Result has 750 places, 1399 transitions, 54338 flow [2023-11-17 16:43:51,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=53475, PETRI_DIFFERENCE_MINUEND_PLACES=731, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=540, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=863, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=54338, PETRI_PLACES=750, PETRI_TRANSITIONS=1399} [2023-11-17 16:43:51,362 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 729 predicate places. [2023-11-17 16:43:51,362 INFO L495 AbstractCegarLoop]: Abstraction has has 750 places, 1399 transitions, 54338 flow [2023-11-17 16:43:51,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 171.42857142857142) internal successors, (2400), 14 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:51,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:43:51,363 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:43:51,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-17 16:43:51,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-17 16:43:51,563 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:43:51,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:43:51,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1412748014, now seen corresponding path program 23 times [2023-11-17 16:43:51,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:43:51,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004733931] [2023-11-17 16:43:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:43:51,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:43:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:51,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:43:51,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004733931] [2023-11-17 16:43:51,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004733931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:43:51,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427459339] [2023-11-17 16:43:51,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:43:51,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:51,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:43:51,729 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:43:51,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-17 16:43:51,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:43:51,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:43:51,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 16:43:51,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:43:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:43:52,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:43:52,174 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 16:43:52,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427459339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:43:52,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:43:52,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2023-11-17 16:43:52,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428403119] [2023-11-17 16:43:52,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:43:52,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 16:43:52,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:43:52,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 16:43:52,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-17 16:43:52,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:43:52,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 1399 transitions, 54338 flow. Second operand has 16 states, 16 states have (on average 170.8125) internal successors, (2733), 16 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:52,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:43:52,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:43:52,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:43:57,002 INFO L124 PetriNetUnfolderBase]: 3614/6852 cut-off events. [2023-11-17 16:43:57,002 INFO L125 PetriNetUnfolderBase]: For 435725/435725 co-relation queries the response was YES. [2023-11-17 16:43:57,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101357 conditions, 6852 events. 3614/6852 cut-off events. For 435725/435725 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 53423 event pairs, 593 based on Foata normal form. 36/6888 useless extension candidates. Maximal degree in co-relation 101160. Up to 4247 conditions per place. [2023-11-17 16:43:57,118 INFO L140 encePairwiseOnDemand]: 447/454 looper letters, 838 selfloop transitions, 666 changer transitions 0/1504 dead transitions. [2023-11-17 16:43:57,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 1504 transitions, 59079 flow [2023-11-17 16:43:57,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:43:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:43:57,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4545 transitions. [2023-11-17 16:43:57,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38503896984073194 [2023-11-17 16:43:57,122 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4545 transitions. [2023-11-17 16:43:57,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4545 transitions. [2023-11-17 16:43:57,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:43:57,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4545 transitions. [2023-11-17 16:43:57,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 174.80769230769232) internal successors, (4545), 26 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:57,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 454.0) internal successors, (12258), 27 states have internal predecessors, (12258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:57,132 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 454.0) internal successors, (12258), 27 states have internal predecessors, (12258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:57,132 INFO L175 Difference]: Start difference. First operand has 750 places, 1399 transitions, 54338 flow. Second operand 26 states and 4545 transitions. [2023-11-17 16:43:57,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 770 places, 1504 transitions, 59079 flow [2023-11-17 16:44:01,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 759 places, 1504 transitions, 58740 flow, removed 23 selfloop flow, removed 11 redundant places. [2023-11-17 16:44:01,668 INFO L231 Difference]: Finished difference. Result has 769 places, 1421 transitions, 56771 flow [2023-11-17 16:44:01,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=53331, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=630, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=56771, PETRI_PLACES=769, PETRI_TRANSITIONS=1421} [2023-11-17 16:44:01,669 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 748 predicate places. [2023-11-17 16:44:01,669 INFO L495 AbstractCegarLoop]: Abstraction has has 769 places, 1421 transitions, 56771 flow [2023-11-17 16:44:01,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.8125) internal successors, (2733), 16 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:01,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:44:01,670 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 16:44:01,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-17 16:44:01,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-17 16:44:01,870 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:44:01,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:44:01,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1011172849, now seen corresponding path program 7 times [2023-11-17 16:44:01,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:44:01,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002093136] [2023-11-17 16:44:01,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:44:01,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:44:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:44:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:01,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:44:01,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002093136] [2023-11-17 16:44:01,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002093136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:44:01,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436340052] [2023-11-17 16:44:01,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:44:01,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:44:01,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:44:01,971 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:44:01,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-17 16:44:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:44:02,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 16:44:02,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:44:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:02,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:44:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:02,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436340052] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:44:02,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:44:02,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2023-11-17 16:44:02,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761436972] [2023-11-17 16:44:02,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:44:02,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:44:02,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:44:02,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:44:02,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:44:02,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:44:02,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 1421 transitions, 56771 flow. Second operand has 18 states, 18 states have (on average 171.27777777777777) internal successors, (3083), 18 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:02,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:44:02,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:44:02,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:44:07,177 INFO L124 PetriNetUnfolderBase]: 3444/6542 cut-off events. [2023-11-17 16:44:07,177 INFO L125 PetriNetUnfolderBase]: For 466432/466432 co-relation queries the response was YES. [2023-11-17 16:44:07,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99179 conditions, 6542 events. 3444/6542 cut-off events. For 466432/466432 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 51131 event pairs, 571 based on Foata normal form. 56/6598 useless extension candidates. Maximal degree in co-relation 98975. Up to 3061 conditions per place. [2023-11-17 16:44:07,321 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 824 selfloop transitions, 616 changer transitions 41/1481 dead transitions. [2023-11-17 16:44:07,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 788 places, 1481 transitions, 59858 flow [2023-11-17 16:44:07,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:44:07,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:44:07,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3492 transitions. [2023-11-17 16:44:07,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38458149779735684 [2023-11-17 16:44:07,325 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3492 transitions. [2023-11-17 16:44:07,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3492 transitions. [2023-11-17 16:44:07,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:44:07,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3492 transitions. [2023-11-17 16:44:07,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 174.6) internal successors, (3492), 20 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:07,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 454.0) internal successors, (9534), 21 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:07,334 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 454.0) internal successors, (9534), 21 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:07,334 INFO L175 Difference]: Start difference. First operand has 769 places, 1421 transitions, 56771 flow. Second operand 20 states and 3492 transitions. [2023-11-17 16:44:07,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 788 places, 1481 transitions, 59858 flow [2023-11-17 16:44:11,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 775 places, 1481 transitions, 59140 flow, removed 115 selfloop flow, removed 13 redundant places. [2023-11-17 16:44:11,996 INFO L231 Difference]: Finished difference. Result has 775 places, 1370 transitions, 54868 flow [2023-11-17 16:44:11,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=55089, PETRI_DIFFERENCE_MINUEND_PLACES=756, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=616, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=788, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=54868, PETRI_PLACES=775, PETRI_TRANSITIONS=1370} [2023-11-17 16:44:11,997 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 754 predicate places. [2023-11-17 16:44:11,997 INFO L495 AbstractCegarLoop]: Abstraction has has 775 places, 1370 transitions, 54868 flow [2023-11-17 16:44:11,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 171.27777777777777) internal successors, (3083), 18 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:11,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:44:11,998 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 16:44:12,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-17 16:44:12,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:44:12,198 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:44:12,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:44:12,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1544454932, now seen corresponding path program 8 times [2023-11-17 16:44:12,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:44:12,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235227218] [2023-11-17 16:44:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:44:12,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:44:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:44:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:44:12,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235227218] [2023-11-17 16:44:12,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235227218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:44:12,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4914391] [2023-11-17 16:44:12,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:44:12,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:44:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:44:12,416 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:44:12,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-17 16:44:12,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:44:12,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:44:12,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 16:44:12,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:44:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:12,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:44:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:12,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4914391] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:44:12,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:44:12,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 16:44:12,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23535935] [2023-11-17 16:44:12,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:44:12,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:44:12,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:44:12,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:44:12,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:44:12,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:44:12,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 775 places, 1370 transitions, 54868 flow. Second operand has 18 states, 18 states have (on average 170.88888888888889) internal successors, (3076), 18 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:12,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:44:12,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:44:12,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:44:18,648 INFO L124 PetriNetUnfolderBase]: 3506/6578 cut-off events. [2023-11-17 16:44:18,648 INFO L125 PetriNetUnfolderBase]: For 458289/458289 co-relation queries the response was YES. [2023-11-17 16:44:18,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101391 conditions, 6578 events. 3506/6578 cut-off events. For 458289/458289 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 50425 event pairs, 463 based on Foata normal form. 32/6610 useless extension candidates. Maximal degree in co-relation 101190. Up to 3023 conditions per place. [2023-11-17 16:44:18,743 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 687 selfloop transitions, 845 changer transitions 1/1533 dead transitions. [2023-11-17 16:44:18,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 1533 transitions, 61565 flow [2023-11-17 16:44:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 16:44:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 16:44:18,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5233 transitions. [2023-11-17 16:44:18,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842143906020558 [2023-11-17 16:44:18,747 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5233 transitions. [2023-11-17 16:44:18,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5233 transitions. [2023-11-17 16:44:18,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:44:18,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5233 transitions. [2023-11-17 16:44:18,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 174.43333333333334) internal successors, (5233), 30 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:18,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 454.0) internal successors, (14074), 31 states have internal predecessors, (14074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:18,756 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 454.0) internal successors, (14074), 31 states have internal predecessors, (14074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:18,756 INFO L175 Difference]: Start difference. First operand has 775 places, 1370 transitions, 54868 flow. Second operand 30 states and 5233 transitions. [2023-11-17 16:44:18,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 1533 transitions, 61565 flow [2023-11-17 16:44:23,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 774 places, 1533 transitions, 59927 flow, removed 10 selfloop flow, removed 19 redundant places. [2023-11-17 16:44:23,096 INFO L231 Difference]: Finished difference. Result has 783 places, 1430 transitions, 58122 flow [2023-11-17 16:44:23,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=53136, PETRI_DIFFERENCE_MINUEND_PLACES=745, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=782, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=58122, PETRI_PLACES=783, PETRI_TRANSITIONS=1430} [2023-11-17 16:44:23,097 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 762 predicate places. [2023-11-17 16:44:23,097 INFO L495 AbstractCegarLoop]: Abstraction has has 783 places, 1430 transitions, 58122 flow [2023-11-17 16:44:23,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 170.88888888888889) internal successors, (3076), 18 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:23,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:44:23,098 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 16:44:23,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-17 16:44:23,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-17 16:44:23,299 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:44:23,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:44:23,299 INFO L85 PathProgramCache]: Analyzing trace with hash -2009533494, now seen corresponding path program 9 times [2023-11-17 16:44:23,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:44:23,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590490830] [2023-11-17 16:44:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:44:23,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:44:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:44:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:23,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:44:23,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590490830] [2023-11-17 16:44:23,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590490830] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:44:23,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840266510] [2023-11-17 16:44:23,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:44:23,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:44:23,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:44:23,473 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:44:23,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-17 16:44:23,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:44:23,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:44:23,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-17 16:44:23,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:44:23,710 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 16:44:23,742 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 16:44:23,775 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 16:44:23,804 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 16:44:24,692 INFO L349 Elim1Store]: treesize reduction 198, result has 12.0 percent of original size [2023-11-17 16:44:24,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 219 treesize of output 128 [2023-11-17 16:44:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:44:24,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:44:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:25,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840266510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:44:25,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:44:25,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 26 [2023-11-17 16:44:25,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183883925] [2023-11-17 16:44:25,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:44:25,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:44:25,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:44:25,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:44:25,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:44:25,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 454 [2023-11-17 16:44:25,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 783 places, 1430 transitions, 58122 flow. Second operand has 26 states, 26 states have (on average 114.6923076923077) internal successors, (2982), 26 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:25,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:44:25,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 454 [2023-11-17 16:44:25,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:44:38,099 INFO L124 PetriNetUnfolderBase]: 4442/8407 cut-off events. [2023-11-17 16:44:38,099 INFO L125 PetriNetUnfolderBase]: For 572733/572733 co-relation queries the response was YES. [2023-11-17 16:44:38,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127312 conditions, 8407 events. 4442/8407 cut-off events. For 572733/572733 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 67534 event pairs, 39 based on Foata normal form. 9/8416 useless extension candidates. Maximal degree in co-relation 127104. Up to 3463 conditions per place. [2023-11-17 16:44:38,229 INFO L140 encePairwiseOnDemand]: 442/454 looper letters, 550 selfloop transitions, 1453 changer transitions 6/2009 dead transitions. [2023-11-17 16:44:38,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 839 places, 2009 transitions, 79607 flow [2023-11-17 16:44:38,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-17 16:44:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-11-17 16:44:38,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 6770 transitions. [2023-11-17 16:44:38,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26161218023031146 [2023-11-17 16:44:38,234 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 6770 transitions. [2023-11-17 16:44:38,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 6770 transitions. [2023-11-17 16:44:38,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:44:38,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 6770 transitions. [2023-11-17 16:44:38,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 118.7719298245614) internal successors, (6770), 57 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:38,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 454.0) internal successors, (26332), 58 states have internal predecessors, (26332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:38,249 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 454.0) internal successors, (26332), 58 states have internal predecessors, (26332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:38,250 INFO L175 Difference]: Start difference. First operand has 783 places, 1430 transitions, 58122 flow. Second operand 57 states and 6770 transitions. [2023-11-17 16:44:38,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 839 places, 2009 transitions, 79607 flow [2023-11-17 16:44:44,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 827 places, 2009 transitions, 78275 flow, removed 271 selfloop flow, removed 12 redundant places. [2023-11-17 16:44:44,769 INFO L231 Difference]: Finished difference. Result has 843 places, 1829 transitions, 77319 flow [2023-11-17 16:44:44,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=56932, PETRI_DIFFERENCE_MINUEND_PLACES=771, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=77319, PETRI_PLACES=843, PETRI_TRANSITIONS=1829} [2023-11-17 16:44:44,770 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 822 predicate places. [2023-11-17 16:44:44,770 INFO L495 AbstractCegarLoop]: Abstraction has has 843 places, 1829 transitions, 77319 flow [2023-11-17 16:44:44,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 114.6923076923077) internal successors, (2982), 26 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:44,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:44:44,771 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 16:44:44,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-17 16:44:44,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-17 16:44:44,971 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:44:44,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:44:44,972 INFO L85 PathProgramCache]: Analyzing trace with hash 766502212, now seen corresponding path program 10 times [2023-11-17 16:44:44,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:44:44,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395124956] [2023-11-17 16:44:44,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:44:44,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:44:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:44:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:45,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:44:45,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395124956] [2023-11-17 16:44:45,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395124956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:44:45,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496465151] [2023-11-17 16:44:45,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:44:45,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:44:45,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:44:45,139 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:44:45,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-17 16:44:45,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:44:45,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:44:45,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-17 16:44:45,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:44:45,397 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 16:44:45,427 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 16:44:45,460 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 16:44:45,490 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 16:44:46,395 INFO L349 Elim1Store]: treesize reduction 198, result has 12.0 percent of original size [2023-11-17 16:44:46,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 219 treesize of output 128 [2023-11-17 16:44:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:44:46,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:44:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:44:46,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496465151] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:44:46,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:44:46,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 26 [2023-11-17 16:44:46,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960073627] [2023-11-17 16:44:46,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:44:46,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:44:46,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:44:46,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:44:46,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:44:46,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 454 [2023-11-17 16:44:46,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 843 places, 1829 transitions, 77319 flow. Second operand has 26 states, 26 states have (on average 114.6923076923077) internal successors, (2982), 26 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:46,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:44:46,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 454 [2023-11-17 16:44:46,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:44:58,813 INFO L124 PetriNetUnfolderBase]: 4780/9091 cut-off events. [2023-11-17 16:44:58,814 INFO L125 PetriNetUnfolderBase]: For 673262/673262 co-relation queries the response was YES. [2023-11-17 16:44:58,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143565 conditions, 9091 events. 4780/9091 cut-off events. For 673262/673262 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 74084 event pairs, 23 based on Foata normal form. 5/9096 useless extension candidates. Maximal degree in co-relation 143344. Up to 3647 conditions per place. [2023-11-17 16:44:59,026 INFO L140 encePairwiseOnDemand]: 442/454 looper letters, 637 selfloop transitions, 1509 changer transitions 2/2148 dead transitions. [2023-11-17 16:44:59,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 2148 transitions, 90221 flow [2023-11-17 16:44:59,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-17 16:44:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-11-17 16:44:59,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 5936 transitions. [2023-11-17 16:44:59,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2614977973568282 [2023-11-17 16:44:59,030 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 5936 transitions. [2023-11-17 16:44:59,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 5936 transitions. [2023-11-17 16:44:59,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:44:59,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 5936 transitions. [2023-11-17 16:44:59,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 118.72) internal successors, (5936), 50 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:59,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 454.0) internal successors, (23154), 51 states have internal predecessors, (23154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:59,045 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 454.0) internal successors, (23154), 51 states have internal predecessors, (23154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:59,045 INFO L175 Difference]: Start difference. First operand has 843 places, 1829 transitions, 77319 flow. Second operand 50 states and 5936 transitions. [2023-11-17 16:44:59,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 2148 transitions, 90221 flow [2023-11-17 16:45:08,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 867 places, 2148 transitions, 88254 flow, removed 831 selfloop flow, removed 25 redundant places. [2023-11-17 16:45:08,631 INFO L231 Difference]: Finished difference. Result has 880 places, 1982 transitions, 87145 flow [2023-11-17 16:45:08,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=75829, PETRI_DIFFERENCE_MINUEND_PLACES=818, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=87145, PETRI_PLACES=880, PETRI_TRANSITIONS=1982} [2023-11-17 16:45:08,632 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 859 predicate places. [2023-11-17 16:45:08,632 INFO L495 AbstractCegarLoop]: Abstraction has has 880 places, 1982 transitions, 87145 flow [2023-11-17 16:45:08,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 114.6923076923077) internal successors, (2982), 26 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:08,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:45:08,633 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:45:08,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-11-17 16:45:08,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-17 16:45:08,833 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:45:08,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:45:08,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1741765753, now seen corresponding path program 13 times [2023-11-17 16:45:08,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:45:08,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606217899] [2023-11-17 16:45:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:45:08,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:45:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:45:09,008 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 16:45:09,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:45:09,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606217899] [2023-11-17 16:45:09,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606217899] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:45:09,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662637544] [2023-11-17 16:45:09,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:45:09,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:45:09,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:45:09,013 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:45:09,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-17 16:45:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:45:09,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:45:09,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:45:09,335 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 16:45:09,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:45:09,472 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 16:45:09,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662637544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:45:09,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:45:09,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-17 16:45:09,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047656835] [2023-11-17 16:45:09,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:45:09,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:45:09,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:45:09,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:45:09,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:45:09,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:45:09,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 880 places, 1982 transitions, 87145 flow. Second operand has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:09,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:45:09,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:45:09,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:45:18,560 INFO L124 PetriNetUnfolderBase]: 4811/9161 cut-off events. [2023-11-17 16:45:18,560 INFO L125 PetriNetUnfolderBase]: For 756831/756831 co-relation queries the response was YES. [2023-11-17 16:45:18,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147147 conditions, 9161 events. 4811/9161 cut-off events. For 756831/756831 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 74862 event pairs, 365 based on Foata normal form. 60/9221 useless extension candidates. Maximal degree in co-relation 146917. Up to 3656 conditions per place. [2023-11-17 16:45:18,703 INFO L140 encePairwiseOnDemand]: 447/454 looper letters, 961 selfloop transitions, 1156 changer transitions 0/2117 dead transitions. [2023-11-17 16:45:18,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 907 places, 2117 transitions, 93479 flow [2023-11-17 16:45:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 16:45:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 16:45:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4888 transitions. [2023-11-17 16:45:18,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38451856513530525 [2023-11-17 16:45:18,706 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4888 transitions. [2023-11-17 16:45:18,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4888 transitions. [2023-11-17 16:45:18,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:45:18,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4888 transitions. [2023-11-17 16:45:18,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 174.57142857142858) internal successors, (4888), 28 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:18,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 454.0) internal successors, (13166), 29 states have internal predecessors, (13166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:18,714 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 454.0) internal successors, (13166), 29 states have internal predecessors, (13166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:18,715 INFO L175 Difference]: Start difference. First operand has 880 places, 1982 transitions, 87145 flow. Second operand 28 states and 4888 transitions. [2023-11-17 16:45:18,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 907 places, 2117 transitions, 93479 flow [2023-11-17 16:45:29,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 882 places, 2117 transitions, 91809 flow, removed 336 selfloop flow, removed 25 redundant places. [2023-11-17 16:45:29,187 INFO L231 Difference]: Finished difference. Result has 886 places, 1995 transitions, 88080 flow [2023-11-17 16:45:29,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=85274, PETRI_DIFFERENCE_MINUEND_PLACES=855, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1977, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=88080, PETRI_PLACES=886, PETRI_TRANSITIONS=1995} [2023-11-17 16:45:29,189 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 865 predicate places. [2023-11-17 16:45:29,189 INFO L495 AbstractCegarLoop]: Abstraction has has 886 places, 1995 transitions, 88080 flow [2023-11-17 16:45:29,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:29,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:45:29,190 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 16:45:29,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-17 16:45:29,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:45:29,390 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:45:29,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:45:29,391 INFO L85 PathProgramCache]: Analyzing trace with hash 2000309410, now seen corresponding path program 11 times [2023-11-17 16:45:29,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:45:29,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598248951] [2023-11-17 16:45:29,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:45:29,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:45:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:45:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:45:29,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:45:29,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598248951] [2023-11-17 16:45:29,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598248951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:45:29,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976346114] [2023-11-17 16:45:29,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:45:29,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:45:29,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:45:29,553 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:45:29,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-17 16:45:29,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:45:29,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:45:29,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:45:29,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:45:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:45:29,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:45:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:45:29,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976346114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:45:29,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:45:29,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-17 16:45:29,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48489280] [2023-11-17 16:45:29,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:45:29,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:45:29,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:45:29,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:45:29,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:45:29,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:45:29,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 886 places, 1995 transitions, 88080 flow. Second operand has 19 states, 19 states have (on average 170.6315789473684) internal successors, (3242), 19 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:29,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:45:29,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:45:29,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:45:40,508 INFO L124 PetriNetUnfolderBase]: 5253/9979 cut-off events. [2023-11-17 16:45:40,509 INFO L125 PetriNetUnfolderBase]: For 844809/844809 co-relation queries the response was YES. [2023-11-17 16:45:40,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161642 conditions, 9979 events. 5253/9979 cut-off events. For 844809/844809 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 82351 event pairs, 705 based on Foata normal form. 80/10059 useless extension candidates. Maximal degree in co-relation 161412. Up to 4494 conditions per place. [2023-11-17 16:45:40,666 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 1152 selfloop transitions, 1197 changer transitions 0/2349 dead transitions. [2023-11-17 16:45:40,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 2349 transitions, 103352 flow [2023-11-17 16:45:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-17 16:45:40,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-17 16:45:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 7854 transitions. [2023-11-17 16:45:40,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3844346549192364 [2023-11-17 16:45:40,671 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 7854 transitions. [2023-11-17 16:45:40,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 7854 transitions. [2023-11-17 16:45:40,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:45:40,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 7854 transitions. [2023-11-17 16:45:40,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 174.53333333333333) internal successors, (7854), 45 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:40,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 454.0) internal successors, (20884), 46 states have internal predecessors, (20884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:40,684 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 454.0) internal successors, (20884), 46 states have internal predecessors, (20884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:40,684 INFO L175 Difference]: Start difference. First operand has 886 places, 1995 transitions, 88080 flow. Second operand 45 states and 7854 transitions. [2023-11-17 16:45:40,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 2349 transitions, 103352 flow [2023-11-17 16:45:52,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 917 places, 2349 transitions, 101436 flow, removed 209 selfloop flow, removed 13 redundant places. [2023-11-17 16:45:52,190 INFO L231 Difference]: Finished difference. Result has 932 places, 2166 transitions, 97180 flow [2023-11-17 16:45:52,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=85834, PETRI_DIFFERENCE_MINUEND_PLACES=873, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1038, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=863, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=97180, PETRI_PLACES=932, PETRI_TRANSITIONS=2166} [2023-11-17 16:45:52,191 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 911 predicate places. [2023-11-17 16:45:52,191 INFO L495 AbstractCegarLoop]: Abstraction has has 932 places, 2166 transitions, 97180 flow [2023-11-17 16:45:52,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 170.6315789473684) internal successors, (3242), 19 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:52,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:45:52,192 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 16:45:52,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-11-17 16:45:52,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:45:52,393 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:45:52,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:45:52,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1298534914, now seen corresponding path program 12 times [2023-11-17 16:45:52,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:45:52,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124310806] [2023-11-17 16:45:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:45:52,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:45:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:45:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:45:52,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:45:52,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124310806] [2023-11-17 16:45:52,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124310806] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:45:52,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520822485] [2023-11-17 16:45:52,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:45:52,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:45:52,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:45:52,528 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:45:52,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-17 16:45:52,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:45:52,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:45:52,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 16:45:52,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:45:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:45:52,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:45:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:45:52,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520822485] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:45:52,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:45:52,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 16:45:52,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781115898] [2023-11-17 16:45:52,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:45:52,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:45:52,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:45:52,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:45:52,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:45:52,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-17 16:45:52,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 932 places, 2166 transitions, 97180 flow. Second operand has 18 states, 18 states have (on average 170.77777777777777) internal successors, (3074), 18 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:45:52,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:45:52,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-17 16:45:52,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:46:03,191 INFO L124 PetriNetUnfolderBase]: 5520/10404 cut-off events. [2023-11-17 16:46:03,191 INFO L125 PetriNetUnfolderBase]: For 893577/893577 co-relation queries the response was YES. [2023-11-17 16:46:03,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172293 conditions, 10404 events. 5520/10404 cut-off events. For 893577/893577 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 85667 event pairs, 889 based on Foata normal form. 12/10416 useless extension candidates. Maximal degree in co-relation 172049. Up to 4968 conditions per place. [2023-11-17 16:46:03,362 INFO L140 encePairwiseOnDemand]: 448/454 looper letters, 1389 selfloop transitions, 1010 changer transitions 0/2399 dead transitions. [2023-11-17 16:46:03,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 965 places, 2399 transitions, 109841 flow [2023-11-17 16:46:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 16:46:03,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 16:46:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5910 transitions. [2023-11-17 16:46:03,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.382871210158072 [2023-11-17 16:46:03,366 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5910 transitions. [2023-11-17 16:46:03,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5910 transitions. [2023-11-17 16:46:03,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:46:03,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5910 transitions. [2023-11-17 16:46:03,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 173.8235294117647) internal successors, (5910), 34 states have internal predecessors, (5910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:46:03,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 454.0) internal successors, (15890), 35 states have internal predecessors, (15890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:46:03,376 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 454.0) internal successors, (15890), 35 states have internal predecessors, (15890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:46:03,376 INFO L175 Difference]: Start difference. First operand has 932 places, 2166 transitions, 97180 flow. Second operand 34 states and 5910 transitions. [2023-11-17 16:46:03,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 965 places, 2399 transitions, 109841 flow [2023-11-17 16:46:15,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 938 places, 2399 transitions, 107961 flow, removed 391 selfloop flow, removed 27 redundant places. [2023-11-17 16:46:16,047 INFO L231 Difference]: Finished difference. Result has 950 places, 2289 transitions, 104904 flow [2023-11-17 16:46:16,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=95450, PETRI_DIFFERENCE_MINUEND_PLACES=905, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=891, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=104904, PETRI_PLACES=950, PETRI_TRANSITIONS=2289} [2023-11-17 16:46:16,048 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 929 predicate places. [2023-11-17 16:46:16,048 INFO L495 AbstractCegarLoop]: Abstraction has has 950 places, 2289 transitions, 104904 flow [2023-11-17 16:46:16,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 170.77777777777777) internal successors, (3074), 18 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:46:16,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:46:16,049 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 16:46:16,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-11-17 16:46:16,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:46:16,249 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:46:16,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:46:16,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1202606098, now seen corresponding path program 13 times [2023-11-17 16:46:16,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:46:16,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514186092] [2023-11-17 16:46:16,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:46:16,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:46:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:46:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:46:16,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:46:16,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514186092] [2023-11-17 16:46:16,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514186092] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:46:16,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070506620] [2023-11-17 16:46:16,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:46:16,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:46:16,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:46:16,416 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:46:16,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-17 16:46:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:46:16,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-17 16:46:16,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:46:16,686 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 16:46:16,724 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 16:46:16,749 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 16:46:17,393 INFO L349 Elim1Store]: treesize reduction 178, result has 24.9 percent of original size [2023-11-17 16:46:17,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 328 treesize of output 236 [2023-11-17 16:46:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:46:17,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:46:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:46:19,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070506620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:46:19,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:46:19,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 26 [2023-11-17 16:46:19,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298990190] [2023-11-17 16:46:19,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:46:19,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:46:19,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:46:19,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:46:19,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:46:19,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 454 [2023-11-17 16:46:19,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 950 places, 2289 transitions, 104904 flow. Second operand has 26 states, 26 states have (on average 114.73076923076923) internal successors, (2983), 26 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:46:19,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:46:19,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 454 [2023-11-17 16:46:19,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:46:51,743 INFO L124 PetriNetUnfolderBase]: 5857/11079 cut-off events. [2023-11-17 16:46:51,743 INFO L125 PetriNetUnfolderBase]: For 984210/984210 co-relation queries the response was YES. [2023-11-17 16:46:51,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185462 conditions, 11079 events. 5857/11079 cut-off events. For 984210/984210 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 92533 event pairs, 95 based on Foata normal form. 18/11097 useless extension candidates. Maximal degree in co-relation 185212. Up to 4394 conditions per place. [2023-11-17 16:46:51,951 INFO L140 encePairwiseOnDemand]: 442/454 looper letters, 764 selfloop transitions, 1870 changer transitions 16/2650 dead transitions. [2023-11-17 16:46:51,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1021 places, 2650 transitions, 118647 flow [2023-11-17 16:46:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-17 16:46:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-11-17 16:46:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 8653 transitions. [2023-11-17 16:46:51,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26108864884436667 [2023-11-17 16:46:51,957 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 8653 transitions. [2023-11-17 16:46:51,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 8653 transitions. [2023-11-17 16:46:51,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:46:51,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 8653 transitions. [2023-11-17 16:46:51,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 118.53424657534246) internal successors, (8653), 73 states have internal predecessors, (8653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:46:51,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 454.0) internal successors, (33596), 74 states have internal predecessors, (33596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:46:51,977 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 454.0) internal successors, (33596), 74 states have internal predecessors, (33596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:46:51,978 INFO L175 Difference]: Start difference. First operand has 950 places, 2289 transitions, 104904 flow. Second operand 73 states and 8653 transitions. [2023-11-17 16:46:51,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1021 places, 2650 transitions, 118647 flow Received shutdown request... [2023-11-17 16:47:02,523 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 16:47:02,532 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:47:02,532 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:47:02,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-11-17 16:47:02,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-17 16:47:02,729 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-11-17 16:47:02,731 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 16:47:02,731 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 16:47:02,731 INFO L445 BasicCegarLoop]: Path program histogram: [23, 13, 13, 4, 1] [2023-11-17 16:47:02,733 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:47:02,733 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:47:02,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:47:02 BasicIcfg [2023-11-17 16:47:02,735 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:47:02,735 INFO L158 Benchmark]: Toolchain (without parser) took 509410.71ms. Allocated memory was 353.4MB in the beginning and 4.0GB in the end (delta: 3.6GB). Free memory was 295.4MB in the beginning and 1.8GB in the end (delta: -1.5GB). Peak memory consumption was 3.0GB. Max. memory is 8.0GB. [2023-11-17 16:47:02,735 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 196.1MB. Free memory is still 146.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:47:02,735 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.80ms. Allocated memory is still 353.4MB. Free memory was 295.4MB in the beginning and 283.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-11-17 16:47:02,735 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.33ms. Allocated memory is still 353.4MB. Free memory was 283.3MB in the beginning and 281.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:47:02,735 INFO L158 Benchmark]: Boogie Preprocessor took 27.56ms. Allocated memory is still 353.4MB. Free memory was 281.3MB in the beginning and 279.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 16:47:02,735 INFO L158 Benchmark]: RCFGBuilder took 449.76ms. Allocated memory is still 353.4MB. Free memory was 279.7MB in the beginning and 260.9MB in the end (delta: 18.8MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2023-11-17 16:47:02,736 INFO L158 Benchmark]: TraceAbstraction took 508656.42ms. Allocated memory was 353.4MB in the beginning and 4.0GB in the end (delta: 3.6GB). Free memory was 260.3MB in the beginning and 1.8GB in the end (delta: -1.6GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2023-11-17 16:47:02,736 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 196.1MB. Free memory is still 146.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 229.80ms. Allocated memory is still 353.4MB. Free memory was 295.4MB in the beginning and 283.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 40.33ms. Allocated memory is still 353.4MB. Free memory was 283.3MB in the beginning and 281.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.56ms. Allocated memory is still 353.4MB. Free memory was 281.3MB in the beginning and 279.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 449.76ms. Allocated memory is still 353.4MB. Free memory was 279.7MB in the beginning and 260.9MB in the end (delta: 18.8MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * TraceAbstraction took 508656.42ms. Allocated memory was 353.4MB in the beginning and 4.0GB in the end (delta: 3.6GB). Free memory was 260.3MB in the beginning and 1.8GB in the end (delta: -1.6GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.6s, 189 PlacesBefore, 21 PlacesAfterwards, 200 TransitionsBefore, 17 TransitionsAfterwards, 4752 CoEnabledTransitionPairs, 8 FixpointIterations, 77 TrivialSequentialCompositions, 93 ConcurrentSequentialCompositions, 20 TrivialYvCompositions, 38 ConcurrentYvCompositions, 15 ChoiceCompositions, 243 TotalNumberOfCompositions, 4551 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4467, independent: 4457, independent conditional: 0, independent unconditional: 4457, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 3544, independent: 3537, independent conditional: 0, independent unconditional: 3537, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 3544, independent: 3537, independent conditional: 0, independent unconditional: 3537, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 14, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4467, independent: 920, independent conditional: 0, independent unconditional: 920, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 3544, unknown conditional: 0, unknown unconditional: 3544] , Statistics on independence cache: Total cache size (in pairs): 26, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 288 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 508.5s, OverallIterations: 54, TraceHistogramMax: 3, PathProgramHistogramMax: 23, EmptinessCheckTime: 0.0s, AutomataDifference: 405.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.8s, HoareTripleCheckerStatistics: 112 mSolverCounterUnknown, 7074 SdHoareTripleChecker+Valid, 84.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7074 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 79.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 130 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1627 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33625 IncrementalHoareTripleChecker+Invalid, 35494 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1627 mSolverCounterUnsat, 0 mSDtfsCounter, 33625 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3491 GetRequests, 1649 SyntacticMatches, 18 SemanticMatches, 1824 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19790 ImplicationChecksByTransitivity, 100.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104904occurred in iteration=53, InterpolantAutomatonStates: 1436, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 4.1s SatisfiabilityAnalysisTime, 77.0s InterpolantComputationTime, 1828 NumberOfCodeBlocks, 1828 NumberOfCodeBlocksAsserted, 148 NumberOfCheckSat, 2553 ConstructedInterpolants, 28 QuantifiedInterpolants, 47913 SizeOfPredicates, 860 NumberOfNonLiveVariables, 8411 ConjunctsInSsa, 1247 ConjunctsInUnsatCore, 152 InterpolantComputations, 5 PerfectInterpolantSequences, 352/844 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown