/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 --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:40:20,379 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:40:20,461 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 12:40:20,496 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:40:20,500 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:40:20,500 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:40:20,501 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:40:20,501 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:40:20,501 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:40:20,507 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:40:20,507 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:40:20,508 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:40:20,508 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:40:20,509 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:40:20,509 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:40:20,510 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:40:20,510 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:40:20,510 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:40:20,510 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:40:20,510 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:40:20,511 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:40:20,511 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:40:20,512 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:40:20,512 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:40:20,512 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:40:20,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:40:20,512 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:40:20,513 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:40:20,513 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:40:20,513 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:40:20,514 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:40:20,514 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:40:20,514 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:40:20,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:40:20,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:40:20,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:40:20,772 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:40:20,773 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:40:20,775 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2023-11-17 12:40:21,948 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:40:22,176 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:40:22,178 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2023-11-17 12:40:22,186 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b896ede65/db159786fa584df1a32573270e007a89/FLAG73431d94f [2023-11-17 12:40:22,204 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b896ede65/db159786fa584df1a32573270e007a89 [2023-11-17 12:40:22,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:40:22,208 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:40:22,210 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:40:22,210 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:40:22,214 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:40:22,214 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:40:22" (1/1) ... [2023-11-17 12:40:22,216 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@168c4df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:40:22, skipping insertion in model container [2023-11-17 12:40:22,216 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:40:22" (1/1) ... [2023-11-17 12:40:22,245 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:40:22,439 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-4.wvr.c[2834,2847] [2023-11-17 12:40:22,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:40:22,471 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:40:22,492 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-4.wvr.c[2834,2847] [2023-11-17 12:40:22,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:40:22,508 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:40:22,510 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:40:22 WrapperNode [2023-11-17 12:40:22,511 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:40:22,512 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:40:22,512 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:40:22,512 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:40:22,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:40:22" (1/1) ... [2023-11-17 12:40:22,524 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:40:22" (1/1) ... [2023-11-17 12:40:22,554 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 188 [2023-11-17 12:40:22,554 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:40:22,555 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:40:22,555 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:40:22,555 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:40:22,562 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:40:22" (1/1) ... [2023-11-17 12:40:22,563 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:40:22" (1/1) ... [2023-11-17 12:40:22,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:40:22" (1/1) ... [2023-11-17 12:40:22,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:40:22" (1/1) ... [2023-11-17 12:40:22,573 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:40:22" (1/1) ... [2023-11-17 12:40:22,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:40:22" (1/1) ... [2023-11-17 12:40:22,578 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:40:22" (1/1) ... [2023-11-17 12:40:22,579 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:40:22" (1/1) ... [2023-11-17 12:40:22,582 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:40:22,583 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:40:22,583 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:40:22,583 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:40:22,583 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:40:22" (1/1) ... [2023-11-17 12:40:22,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:40:22,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:40:22,611 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 12:40:22,626 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 12:40:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:40:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:40:22,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:40:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:40:22,647 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:40:22,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:40:22,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:40:22,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:40:22,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:40:22,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:40:22,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:40:22,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:40:22,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:40:22,649 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 12:40:22,731 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:40:22,733 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:40:23,013 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:40:23,384 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:40:23,384 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 12:40:23,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:40:23 BoogieIcfgContainer [2023-11-17 12:40:23,386 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:40:23,390 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:40:23,390 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:40:23,393 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:40:23,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:40:22" (1/3) ... [2023-11-17 12:40:23,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@adde71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:40:23, skipping insertion in model container [2023-11-17 12:40:23,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:40:22" (2/3) ... [2023-11-17 12:40:23,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@adde71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:40:23, skipping insertion in model container [2023-11-17 12:40:23,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:40:23" (3/3) ... [2023-11-17 12:40:23,396 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2023-11-17 12:40:23,412 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:40:23,412 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:40:23,413 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:40:23,489 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 12:40:23,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2023-11-17 12:40:23,563 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-17 12:40:23,563 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:40:23,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-17 12:40:23,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2023-11-17 12:40:23,571 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2023-11-17 12:40:23,577 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:40:23,588 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 22 places, 18 transitions, 48 flow [2023-11-17 12:40:23,593 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 22 places, 18 transitions, 48 flow [2023-11-17 12:40:23,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 22 places, 18 transitions, 48 flow [2023-11-17 12:40:23,606 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2023-11-17 12:40:23,606 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:40:23,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-17 12:40:23,607 INFO L119 LiptonReduction]: Number of co-enabled transitions 54 [2023-11-17 12:40:23,657 INFO L134 LiptonReduction]: Checked pairs total: 54 [2023-11-17 12:40:23,657 INFO L136 LiptonReduction]: Total number of compositions: 1 [2023-11-17 12:40:23,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:40:23,687 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;@5fa09ebb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:40:23,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 12:40:23,695 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:40:23,695 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-17 12:40:23,695 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:40:23,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:40:23,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:40:23,696 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 12:40:23,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:40:23,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2019126636, now seen corresponding path program 1 times [2023-11-17 12:40:23,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:40:23,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163357090] [2023-11-17 12:40:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:40:23,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:40:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:40:24,192 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 12:40:24,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:40:24,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163357090] [2023-11-17 12:40:24,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163357090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:40:24,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:40:24,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:40:24,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806865775] [2023-11-17 12:40:24,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:40:24,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:40:24,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:40:24,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:40:24,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:40:24,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:40:24,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:24,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:40:24,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:40:24,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:40:24,311 INFO L124 PetriNetUnfolderBase]: 41/76 cut-off events. [2023-11-17 12:40:24,311 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 12:40:24,312 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 12:40:24,313 INFO L140 encePairwiseOnDemand]: 19/22 looper letters, 16 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-11-17 12:40:24,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 84 flow [2023-11-17 12:40:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:40:24,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:40:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2023-11-17 12:40:24,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2023-11-17 12:40:24,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 28 transitions. [2023-11-17 12:40:24,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 28 transitions. [2023-11-17 12:40:24,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:40:24,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 28 transitions. [2023-11-17 12:40:24,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:24,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:24,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:24,335 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 28 transitions. [2023-11-17 12:40:24,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 84 flow [2023-11-17 12:40:24,339 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 12:40:24,340 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-11-17 12:40:24,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, 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 12:40:24,347 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-17 12:40:24,348 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-11-17 12:40:24,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:24,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:40:24,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:40:24,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:40:24,349 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 12:40:24,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:40:24,356 INFO L85 PathProgramCache]: Analyzing trace with hash 595929855, now seen corresponding path program 1 times [2023-11-17 12:40:24,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:40:24,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103602525] [2023-11-17 12:40:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:40:24,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:40:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:40:24,664 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 12:40:24,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:40:24,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103602525] [2023-11-17 12:40:24,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103602525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:40:24,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:40:24,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:40:24,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501585774] [2023-11-17 12:40:24,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:40:24,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:40:24,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:40:24,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:40:24,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:40:24,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:40:24,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:24,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:40:24,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:40:24,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:40:24,893 INFO L124 PetriNetUnfolderBase]: 72/135 cut-off events. [2023-11-17 12:40:24,894 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:40:24,894 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 364 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 12:40:24,895 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-11-17 12:40:24,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-11-17 12:40:24,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:40:24,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:40:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2023-11-17 12:40:24,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-17 12:40:24,898 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 55 transitions. [2023-11-17 12:40:24,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 55 transitions. [2023-11-17 12:40:24,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:40:24,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 55 transitions. [2023-11-17 12:40:24,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:24,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:24,904 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:24,904 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 55 transitions. [2023-11-17 12:40:24,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-11-17 12:40:24,906 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 12:40:24,907 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-11-17 12:40:24,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, 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 12:40:24,908 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-17 12:40:24,909 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-11-17 12:40:24,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:24,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:40:24,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:40:24,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:40:24,910 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 12:40:24,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:40:24,911 INFO L85 PathProgramCache]: Analyzing trace with hash -819368771, now seen corresponding path program 2 times [2023-11-17 12:40:24,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:40:24,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161969460] [2023-11-17 12:40:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:40:24,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:40:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:40:25,109 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 12:40:25,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:40:25,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161969460] [2023-11-17 12:40:25,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161969460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:40:25,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:40:25,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:40:25,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364339662] [2023-11-17 12:40:25,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:40:25,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:40:25,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:40:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:40:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:40:25,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:40:25,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:25,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:40:25,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:40:25,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:40:25,276 INFO L124 PetriNetUnfolderBase]: 111/208 cut-off events. [2023-11-17 12:40:25,277 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2023-11-17 12:40:25,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 208 events. 111/208 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 674 event pairs, 42 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 584. Up to 133 conditions per place. [2023-11-17 12:40:25,282 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 37 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-11-17 12:40:25,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 252 flow [2023-11-17 12:40:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:40:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:40:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2023-11-17 12:40:25,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2023-11-17 12:40:25,285 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 51 transitions. [2023-11-17 12:40:25,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 51 transitions. [2023-11-17 12:40:25,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:40:25,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 51 transitions. [2023-11-17 12:40:25,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:25,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:25,289 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:25,289 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 5 states and 51 transitions. [2023-11-17 12:40:25,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 252 flow [2023-11-17 12:40:25,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 235 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-17 12:40:25,293 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 124 flow [2023-11-17 12:40:25,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-11-17 12:40:25,294 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-11-17 12:40:25,294 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 124 flow [2023-11-17 12:40:25,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:25,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:40:25,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:40:25,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:40:25,295 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 12:40:25,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:40:25,295 INFO L85 PathProgramCache]: Analyzing trace with hash -2128863669, now seen corresponding path program 3 times [2023-11-17 12:40:25,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:40:25,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080360186] [2023-11-17 12:40:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:40:25,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:40:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:40:25,468 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 12:40:25,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:40:25,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080360186] [2023-11-17 12:40:25,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080360186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:40:25,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:40:25,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:40:25,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564375750] [2023-11-17 12:40:25,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:40:25,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:40:25,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:40:25,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:40:25,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:40:25,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:40:25,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:25,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:40:25,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:40:25,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:40:26,153 INFO L124 PetriNetUnfolderBase]: 121/224 cut-off events. [2023-11-17 12:40:26,153 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2023-11-17 12:40:26,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 224 events. 121/224 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 732 event pairs, 44 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 764. Up to 121 conditions per place. [2023-11-17 12:40:26,156 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 37 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2023-11-17 12:40:26,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 321 flow [2023-11-17 12:40:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:40:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:40:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2023-11-17 12:40:26,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2023-11-17 12:40:26,158 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 56 transitions. [2023-11-17 12:40:26,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 56 transitions. [2023-11-17 12:40:26,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:40:26,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 56 transitions. [2023-11-17 12:40:26,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:26,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:26,159 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:26,159 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 124 flow. Second operand 5 states and 56 transitions. [2023-11-17 12:40:26,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 321 flow [2023-11-17 12:40:26,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 297 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-17 12:40:26,164 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 203 flow [2023-11-17 12:40:26,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-11-17 12:40:26,164 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2023-11-17 12:40:26,165 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 203 flow [2023-11-17 12:40:26,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:26,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:40:26,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:40:26,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 12:40:26,165 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 12:40:26,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:40:26,166 INFO L85 PathProgramCache]: Analyzing trace with hash -15310855, now seen corresponding path program 4 times [2023-11-17 12:40:26,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:40:26,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146190938] [2023-11-17 12:40:26,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:40:26,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:40:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:40:26,325 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 12:40:26,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:40:26,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146190938] [2023-11-17 12:40:26,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146190938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:40:26,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:40:26,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:40:26,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886817212] [2023-11-17 12:40:26,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:40:26,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:40:26,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:40:26,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:40:26,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:40:26,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:40:26,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:26,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:40:26,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:40:26,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:40:26,469 INFO L124 PetriNetUnfolderBase]: 117/220 cut-off events. [2023-11-17 12:40:26,469 INFO L125 PetriNetUnfolderBase]: For 561/561 co-relation queries the response was YES. [2023-11-17 12:40:26,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 220 events. 117/220 cut-off events. For 561/561 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 720 event pairs, 50 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 824. Up to 177 conditions per place. [2023-11-17 12:40:26,471 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2023-11-17 12:40:26,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 375 flow [2023-11-17 12:40:26,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:40:26,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:40:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2023-11-17 12:40:26,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-11-17 12:40:26,472 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 50 transitions. [2023-11-17 12:40:26,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 50 transitions. [2023-11-17 12:40:26,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:40:26,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 50 transitions. [2023-11-17 12:40:26,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:26,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:26,474 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:26,474 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 203 flow. Second operand 5 states and 50 transitions. [2023-11-17 12:40:26,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 375 flow [2023-11-17 12:40:26,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 362 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 12:40:26,481 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 296 flow [2023-11-17 12:40:26,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-17 12:40:26,483 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-11-17 12:40:26,484 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 296 flow [2023-11-17 12:40:26,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:26,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:40:26,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:40:26,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 12:40:26,484 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 12:40:26,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:40:26,485 INFO L85 PathProgramCache]: Analyzing trace with hash 778801065, now seen corresponding path program 5 times [2023-11-17 12:40:26,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:40:26,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291751239] [2023-11-17 12:40:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:40:26,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:40:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:40:26,781 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 12:40:26,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:40:26,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291751239] [2023-11-17 12:40:26,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291751239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:40:26,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:40:26,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:40:26,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22503197] [2023-11-17 12:40:26,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:40:26,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:40:26,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:40:26,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:40:26,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:40:26,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:40:26,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:26,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:40:26,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:40:26,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:40:26,919 INFO L124 PetriNetUnfolderBase]: 118/223 cut-off events. [2023-11-17 12:40:26,919 INFO L125 PetriNetUnfolderBase]: For 733/733 co-relation queries the response was YES. [2023-11-17 12:40:26,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 223 events. 118/223 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 752 event pairs, 38 based on Foata normal form. 2/198 useless extension candidates. Maximal degree in co-relation 934. Up to 123 conditions per place. [2023-11-17 12:40:26,922 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 38 selfloop transitions, 14 changer transitions 0/52 dead transitions. [2023-11-17 12:40:26,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 442 flow [2023-11-17 12:40:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:40:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:40:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 54 transitions. [2023-11-17 12:40:26,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2023-11-17 12:40:26,925 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 54 transitions. [2023-11-17 12:40:26,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 54 transitions. [2023-11-17 12:40:26,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:40:26,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 54 transitions. [2023-11-17 12:40:26,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:26,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:26,928 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:26,928 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 296 flow. Second operand 5 states and 54 transitions. [2023-11-17 12:40:26,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 442 flow [2023-11-17 12:40:26,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 388 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-17 12:40:26,933 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 282 flow [2023-11-17 12:40:26,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-11-17 12:40:26,936 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-11-17 12:40:26,936 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 282 flow [2023-11-17 12:40:26,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:26,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:40:26,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:40:26,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 12:40:26,937 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 12:40:26,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:40:26,938 INFO L85 PathProgramCache]: Analyzing trace with hash 40100405, now seen corresponding path program 6 times [2023-11-17 12:40:26,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:40:26,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186946184] [2023-11-17 12:40:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:40:26,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:40:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:40:27,089 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 12:40:27,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:40:27,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186946184] [2023-11-17 12:40:27,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186946184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:40:27,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:40:27,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:40:27,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867319712] [2023-11-17 12:40:27,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:40:27,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:40:27,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:40:27,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:40:27,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:40:27,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:40:27,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:27,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:40:27,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:40:27,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:40:27,230 INFO L124 PetriNetUnfolderBase]: 117/216 cut-off events. [2023-11-17 12:40:27,230 INFO L125 PetriNetUnfolderBase]: For 705/705 co-relation queries the response was YES. [2023-11-17 12:40:27,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 216 events. 117/216 cut-off events. For 705/705 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 681 event pairs, 49 based on Foata normal form. 2/191 useless extension candidates. Maximal degree in co-relation 870. Up to 170 conditions per place. [2023-11-17 12:40:27,232 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 34 selfloop transitions, 15 changer transitions 0/49 dead transitions. [2023-11-17 12:40:27,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 414 flow [2023-11-17 12:40:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:40:27,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:40:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2023-11-17 12:40:27,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-11-17 12:40:27,234 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 50 transitions. [2023-11-17 12:40:27,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 50 transitions. [2023-11-17 12:40:27,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:40:27,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 50 transitions. [2023-11-17 12:40:27,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:27,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:27,235 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:27,235 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 282 flow. Second operand 5 states and 50 transitions. [2023-11-17 12:40:27,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 414 flow [2023-11-17 12:40:27,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 380 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-17 12:40:27,238 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 294 flow [2023-11-17 12:40:27,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-11-17 12:40:27,239 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2023-11-17 12:40:27,239 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 294 flow [2023-11-17 12:40:27,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:27,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:40:27,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:40:27,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 12:40:27,240 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 12:40:27,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:40:27,240 INFO L85 PathProgramCache]: Analyzing trace with hash -593190432, now seen corresponding path program 1 times [2023-11-17 12:40:27,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:40:27,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121074777] [2023-11-17 12:40:27,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:40:27,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:40:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:40:27,408 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 12:40:27,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:40:27,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121074777] [2023-11-17 12:40:27,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121074777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:40:27,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151922151] [2023-11-17 12:40:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:40:27,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:40:27,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:40:27,413 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 12:40:27,429 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 12:40:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:40:27,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 12:40:27,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:40:27,950 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-17 12:40:27,951 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 178 treesize of output 169 [2023-11-17 12:40:28,400 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 12:40:28,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:40:31,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:40:31,125 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 265 treesize of output 186 [2023-11-17 12:40:32,614 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 12:40:32,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151922151] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:40:32,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:40:32,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-11-17 12:40:32,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20179045] [2023-11-17 12:40:32,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:40:32,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:40:32,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:40:32,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:40:32,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:40:32,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:40:32,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 294 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:32,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:40:32,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:40:32,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:40:39,715 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 [] [2023-11-17 12:40:41,796 INFO L124 PetriNetUnfolderBase]: 474/882 cut-off events. [2023-11-17 12:40:41,797 INFO L125 PetriNetUnfolderBase]: For 2542/2542 co-relation queries the response was YES. [2023-11-17 12:40:41,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3471 conditions, 882 events. 474/882 cut-off events. For 2542/2542 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4369 event pairs, 33 based on Foata normal form. 14/750 useless extension candidates. Maximal degree in co-relation 2897. Up to 277 conditions per place. [2023-11-17 12:40:41,803 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 111 selfloop transitions, 63 changer transitions 81/255 dead transitions. [2023-11-17 12:40:41,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 255 transitions, 1913 flow [2023-11-17 12:40:41,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:40:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:40:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 312 transitions. [2023-11-17 12:40:41,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574780058651026 [2023-11-17 12:40:41,805 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 312 transitions. [2023-11-17 12:40:41,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 312 transitions. [2023-11-17 12:40:41,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:40:41,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 312 transitions. [2023-11-17 12:40:41,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 10.064516129032258) internal successors, (312), 31 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:41,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 22.0) internal successors, (704), 32 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:41,809 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 22.0) internal successors, (704), 32 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:41,809 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 294 flow. Second operand 31 states and 312 transitions. [2023-11-17 12:40:41,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 255 transitions, 1913 flow [2023-11-17 12:40:41,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 255 transitions, 1787 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-17 12:40:41,820 INFO L231 Difference]: Finished difference. Result has 97 places, 88 transitions, 882 flow [2023-11-17 12:40:41,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=882, PETRI_PLACES=97, PETRI_TRANSITIONS=88} [2023-11-17 12:40:41,820 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 76 predicate places. [2023-11-17 12:40:41,821 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 88 transitions, 882 flow [2023-11-17 12:40:41,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:41,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:40:41,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:40:41,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 12:40:42,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:40:42,027 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 12:40:42,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:40:42,027 INFO L85 PathProgramCache]: Analyzing trace with hash 98348006, now seen corresponding path program 2 times [2023-11-17 12:40:42,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:40:42,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905756788] [2023-11-17 12:40:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:40:42,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:40:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:40:42,261 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 12:40:42,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:40:42,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905756788] [2023-11-17 12:40:42,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905756788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:40:42,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644860559] [2023-11-17 12:40:42,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:40:42,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:40:42,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:40:42,263 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 12:40:42,282 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 12:40:42,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:40:42,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:40:42,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 12:40:42,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:40:42,744 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-17 12:40:42,744 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 178 treesize of output 169 [2023-11-17 12:40:43,167 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 12:40:43,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:40:44,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:40:44,810 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 407 treesize of output 288 [2023-11-17 12:40:48,426 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 12:40:48,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644860559] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:40:48,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:40:48,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-11-17 12:40:48,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524877497] [2023-11-17 12:40:48,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:40:48,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:40:48,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:40:48,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:40:48,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:40:48,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:40:48,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 88 transitions, 882 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:48,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:40:48,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:40:48,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:40:51,171 INFO L124 PetriNetUnfolderBase]: 373/747 cut-off events. [2023-11-17 12:40:51,171 INFO L125 PetriNetUnfolderBase]: For 5668/5668 co-relation queries the response was YES. [2023-11-17 12:40:51,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4125 conditions, 747 events. 373/747 cut-off events. For 5668/5668 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3840 event pairs, 99 based on Foata normal form. 9/703 useless extension candidates. Maximal degree in co-relation 4009. Up to 502 conditions per place. [2023-11-17 12:40:51,178 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 89 selfloop transitions, 52 changer transitions 21/162 dead transitions. [2023-11-17 12:40:51,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 162 transitions, 1721 flow [2023-11-17 12:40:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:40:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:40:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 183 transitions. [2023-11-17 12:40:51,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2023-11-17 12:40:51,179 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 183 transitions. [2023-11-17 12:40:51,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 183 transitions. [2023-11-17 12:40:51,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:40:51,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 183 transitions. [2023-11-17 12:40:51,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 8.714285714285714) internal successors, (183), 21 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:51,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 22.0) internal successors, (484), 22 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:51,182 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 22.0) internal successors, (484), 22 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:51,182 INFO L175 Difference]: Start difference. First operand has 97 places, 88 transitions, 882 flow. Second operand 21 states and 183 transitions. [2023-11-17 12:40:51,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 162 transitions, 1721 flow [2023-11-17 12:40:51,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 162 transitions, 1553 flow, removed 83 selfloop flow, removed 8 redundant places. [2023-11-17 12:40:51,204 INFO L231 Difference]: Finished difference. Result has 109 places, 99 transitions, 1062 flow [2023-11-17 12:40:51,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1062, PETRI_PLACES=109, PETRI_TRANSITIONS=99} [2023-11-17 12:40:51,205 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 88 predicate places. [2023-11-17 12:40:51,205 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 99 transitions, 1062 flow [2023-11-17 12:40:51,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:51,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:40:51,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:40:51,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 12:40:51,411 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,SelfDestructingSolverStorable8 [2023-11-17 12:40:51,411 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 12:40:51,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:40:51,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1569658520, now seen corresponding path program 3 times [2023-11-17 12:40:51,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:40:51,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053281270] [2023-11-17 12:40:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:40:51,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:40:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:40:51,611 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 12:40:51,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:40:51,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053281270] [2023-11-17 12:40:51,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053281270] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:40:51,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562429409] [2023-11-17 12:40:51,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:40:51,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:40:51,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:40:51,613 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 12:40:51,637 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 12:40:51,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:40:51,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:40:51,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:40:51,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:40:52,041 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 12:40:52,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:40:52,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:40:52,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 227 treesize of output 243 [2023-11-17 12:40:59,854 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 12:40:59,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562429409] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:40:59,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:40:59,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 18 [2023-11-17 12:40:59,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140534978] [2023-11-17 12:40:59,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:40:59,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:40:59,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:40:59,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:40:59,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:40:59,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:40:59,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 99 transitions, 1062 flow. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:40:59,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:40:59,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:40:59,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:02,529 INFO L124 PetriNetUnfolderBase]: 533/1126 cut-off events. [2023-11-17 12:41:02,530 INFO L125 PetriNetUnfolderBase]: For 6348/6348 co-relation queries the response was YES. [2023-11-17 12:41:02,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5729 conditions, 1126 events. 533/1126 cut-off events. For 6348/6348 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6936 event pairs, 23 based on Foata normal form. 10/1045 useless extension candidates. Maximal degree in co-relation 5642. Up to 431 conditions per place. [2023-11-17 12:41:02,537 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 123 selfloop transitions, 136 changer transitions 20/279 dead transitions. [2023-11-17 12:41:02,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 279 transitions, 2875 flow [2023-11-17 12:41:02,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 12:41:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 12:41:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 317 transitions. [2023-11-17 12:41:02,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40025252525252525 [2023-11-17 12:41:02,540 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 317 transitions. [2023-11-17 12:41:02,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 317 transitions. [2023-11-17 12:41:02,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:02,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 317 transitions. [2023-11-17 12:41:02,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 8.805555555555555) internal successors, (317), 36 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:02,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 22.0) internal successors, (814), 37 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:02,543 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 22.0) internal successors, (814), 37 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:02,543 INFO L175 Difference]: Start difference. First operand has 109 places, 99 transitions, 1062 flow. Second operand 36 states and 317 transitions. [2023-11-17 12:41:02,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 279 transitions, 2875 flow [2023-11-17 12:41:02,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 279 transitions, 2756 flow, removed 33 selfloop flow, removed 8 redundant places. [2023-11-17 12:41:02,566 INFO L231 Difference]: Finished difference. Result has 140 places, 173 transitions, 2131 flow [2023-11-17 12:41:02,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2131, PETRI_PLACES=140, PETRI_TRANSITIONS=173} [2023-11-17 12:41:02,566 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 119 predicate places. [2023-11-17 12:41:02,566 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 173 transitions, 2131 flow [2023-11-17 12:41:02,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:02,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:02,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:02,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 12:41:02,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:02,768 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 12:41:02,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:02,768 INFO L85 PathProgramCache]: Analyzing trace with hash -680903572, now seen corresponding path program 4 times [2023-11-17 12:41:02,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:02,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957349799] [2023-11-17 12:41:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:02,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:02,954 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 12:41:02,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:02,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957349799] [2023-11-17 12:41:02,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957349799] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:02,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789226951] [2023-11-17 12:41:02,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:41:02,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:02,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:02,956 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 12:41:02,974 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 12:41:03,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:41:03,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:41:03,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 12:41:03,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:03,112 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 12:41:03,139 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 12:41:03,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:41:03,240 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 12:41:03,415 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-17 12:41:03,415 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 178 treesize of output 169 [2023-11-17 12:41:03,717 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 12:41:03,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:41:05,771 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:05,772 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 12:41:05,790 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:05,791 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 824 treesize of output 704 [2023-11-17 12:41:05,816 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:05,817 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 148 treesize of output 152 [2023-11-17 12:41:05,839 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:05,839 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 113 treesize of output 85 [2023-11-17 12:41:06,348 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:41:06,348 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 52 treesize of output 1 [2023-11-17 12:41:06,355 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:41:06,355 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 277 treesize of output 1 [2023-11-17 12:41:06,384 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 12:41:06,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789226951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:41:06,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:41:06,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2023-11-17 12:41:06,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236891890] [2023-11-17 12:41:06,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:41:06,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:41:06,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:06,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:41:06,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=354, Unknown=4, NotChecked=0, Total=420 [2023-11-17 12:41:06,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:41:06,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 173 transitions, 2131 flow. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:06,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:06,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:41:06,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:09,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:41:13,223 INFO L124 PetriNetUnfolderBase]: 596/1276 cut-off events. [2023-11-17 12:41:13,224 INFO L125 PetriNetUnfolderBase]: For 8741/8741 co-relation queries the response was YES. [2023-11-17 12:41:13,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7257 conditions, 1276 events. 596/1276 cut-off events. For 8741/8741 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8168 event pairs, 73 based on Foata normal form. 22/1207 useless extension candidates. Maximal degree in co-relation 7107. Up to 385 conditions per place. [2023-11-17 12:41:13,235 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 142 selfloop transitions, 78 changer transitions 78/298 dead transitions. [2023-11-17 12:41:13,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 298 transitions, 3674 flow [2023-11-17 12:41:13,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 12:41:13,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 12:41:13,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 248 transitions. [2023-11-17 12:41:13,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4509090909090909 [2023-11-17 12:41:13,237 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 248 transitions. [2023-11-17 12:41:13,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 248 transitions. [2023-11-17 12:41:13,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:13,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 248 transitions. [2023-11-17 12:41:13,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 9.92) internal successors, (248), 25 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:13,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 22.0) internal successors, (572), 26 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:13,240 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 22.0) internal successors, (572), 26 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:13,240 INFO L175 Difference]: Start difference. First operand has 140 places, 173 transitions, 2131 flow. Second operand 25 states and 248 transitions. [2023-11-17 12:41:13,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 298 transitions, 3674 flow [2023-11-17 12:41:13,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 298 transitions, 3059 flow, removed 245 selfloop flow, removed 19 redundant places. [2023-11-17 12:41:13,295 INFO L231 Difference]: Finished difference. Result has 148 places, 155 transitions, 1636 flow [2023-11-17 12:41:13,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1636, PETRI_PLACES=148, PETRI_TRANSITIONS=155} [2023-11-17 12:41:13,296 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2023-11-17 12:41:13,296 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 155 transitions, 1636 flow [2023-11-17 12:41:13,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:13,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:13,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:13,307 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 12:41:13,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:13,503 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 12:41:13,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:13,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1419404666, now seen corresponding path program 5 times [2023-11-17 12:41:13,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:13,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798146885] [2023-11-17 12:41:13,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:13,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:13,737 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 12:41:13,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:13,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798146885] [2023-11-17 12:41:13,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798146885] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:13,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856692685] [2023-11-17 12:41:13,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:41:13,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:13,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:13,739 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 12:41:13,742 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 12:41:13,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:41:13,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:41:13,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-17 12:41:13,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:13,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:41:13,872 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 12:41:13,897 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 12:41:13,933 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 12:41:13,968 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 12:41:14,154 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 161 treesize of output 145 [2023-11-17 12:41:14,345 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 12:41:14,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:41:17,812 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:17,813 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 55 treesize of output 44 [2023-11-17 12:41:17,820 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 12:41:17,820 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 198 treesize of output 169 [2023-11-17 12:41:17,828 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:41:17,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 3 [2023-11-17 12:41:17,835 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:41:17,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 16 [2023-11-17 12:41:17,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:17,845 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 12:41:17,863 INFO L349 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2023-11-17 12:41:17,863 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 500 [2023-11-17 12:41:17,887 INFO L349 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2023-11-17 12:41:17,888 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 89 [2023-11-17 12:41:17,948 INFO L349 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2023-11-17 12:41:17,948 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 92 [2023-11-17 12:41:18,069 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 12:41:18,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856692685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:41:18,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:41:18,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2023-11-17 12:41:18,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56661920] [2023-11-17 12:41:18,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:41:18,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:41:18,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:18,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:41:18,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=334, Unknown=3, NotChecked=0, Total=420 [2023-11-17 12:41:18,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:41:18,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 155 transitions, 1636 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:18,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:18,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:41:18,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:20,991 INFO L124 PetriNetUnfolderBase]: 371/782 cut-off events. [2023-11-17 12:41:20,992 INFO L125 PetriNetUnfolderBase]: For 3694/3694 co-relation queries the response was YES. [2023-11-17 12:41:20,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4082 conditions, 782 events. 371/782 cut-off events. For 3694/3694 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4324 event pairs, 20 based on Foata normal form. 11/752 useless extension candidates. Maximal degree in co-relation 3987. Up to 428 conditions per place. [2023-11-17 12:41:20,998 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 119 selfloop transitions, 70 changer transitions 23/212 dead transitions. [2023-11-17 12:41:20,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 212 transitions, 2313 flow [2023-11-17 12:41:21,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:41:21,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:41:21,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 176 transitions. [2023-11-17 12:41:21,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-17 12:41:21,001 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 176 transitions. [2023-11-17 12:41:21,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 176 transitions. [2023-11-17 12:41:21,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:21,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 176 transitions. [2023-11-17 12:41:21,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:21,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 22.0) internal successors, (462), 21 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:21,003 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 22.0) internal successors, (462), 21 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:21,003 INFO L175 Difference]: Start difference. First operand has 148 places, 155 transitions, 1636 flow. Second operand 20 states and 176 transitions. [2023-11-17 12:41:21,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 212 transitions, 2313 flow [2023-11-17 12:41:21,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 212 transitions, 2055 flow, removed 59 selfloop flow, removed 25 redundant places. [2023-11-17 12:41:21,025 INFO L231 Difference]: Finished difference. Result has 138 places, 150 transitions, 1536 flow [2023-11-17 12:41:21,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1386, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1536, PETRI_PLACES=138, PETRI_TRANSITIONS=150} [2023-11-17 12:41:21,026 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 117 predicate places. [2023-11-17 12:41:21,026 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 150 transitions, 1536 flow [2023-11-17 12:41:21,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:21,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:21,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:21,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-17 12:41:21,233 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,SelfDestructingSolverStorable11 [2023-11-17 12:41:21,233 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 12:41:21,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:21,234 INFO L85 PathProgramCache]: Analyzing trace with hash 664448974, now seen corresponding path program 6 times [2023-11-17 12:41:21,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:21,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5420731] [2023-11-17 12:41:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:21,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:21,422 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 12:41:21,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:21,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5420731] [2023-11-17 12:41:21,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5420731] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:21,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092725003] [2023-11-17 12:41:21,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:41:21,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:21,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:21,424 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 12:41:21,444 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 12:41:21,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:41:21,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:41:21,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 12:41:21,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:21,856 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 12:41:21,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:41:22,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:22,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 223 treesize of output 239 [2023-11-17 12:41:27,033 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 12:41:27,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092725003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:41:27,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:41:27,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-11-17 12:41:27,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320828343] [2023-11-17 12:41:27,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:41:27,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:41:27,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:27,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:41:27,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:41:27,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:41:27,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 150 transitions, 1536 flow. Second operand has 20 states, 20 states have (on average 5.4) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:27,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:27,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:41:27,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:28,153 INFO L124 PetriNetUnfolderBase]: 414/878 cut-off events. [2023-11-17 12:41:28,154 INFO L125 PetriNetUnfolderBase]: For 2972/2972 co-relation queries the response was YES. [2023-11-17 12:41:28,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4444 conditions, 878 events. 414/878 cut-off events. For 2972/2972 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4999 event pairs, 11 based on Foata normal form. 8/844 useless extension candidates. Maximal degree in co-relation 4261. Up to 384 conditions per place. [2023-11-17 12:41:28,161 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 118 selfloop transitions, 129 changer transitions 23/270 dead transitions. [2023-11-17 12:41:28,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 270 transitions, 2749 flow [2023-11-17 12:41:28,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:41:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:41:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 286 transitions. [2023-11-17 12:41:28,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2023-11-17 12:41:28,163 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 286 transitions. [2023-11-17 12:41:28,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 286 transitions. [2023-11-17 12:41:28,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:28,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 286 transitions. [2023-11-17 12:41:28,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 8.17142857142857) internal successors, (286), 35 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:28,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 22.0) internal successors, (792), 36 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:28,166 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 22.0) internal successors, (792), 36 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:28,166 INFO L175 Difference]: Start difference. First operand has 138 places, 150 transitions, 1536 flow. Second operand 35 states and 286 transitions. [2023-11-17 12:41:28,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 270 transitions, 2749 flow [2023-11-17 12:41:28,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 270 transitions, 2542 flow, removed 37 selfloop flow, removed 12 redundant places. [2023-11-17 12:41:28,189 INFO L231 Difference]: Finished difference. Result has 165 places, 179 transitions, 2018 flow [2023-11-17 12:41:28,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2018, PETRI_PLACES=165, PETRI_TRANSITIONS=179} [2023-11-17 12:41:28,190 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 144 predicate places. [2023-11-17 12:41:28,190 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 179 transitions, 2018 flow [2023-11-17 12:41:28,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.4) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:28,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:28,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:28,201 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 12:41:28,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:28,397 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 12:41:28,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:28,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1151999224, now seen corresponding path program 7 times [2023-11-17 12:41:28,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:28,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790954683] [2023-11-17 12:41:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:28,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:28,532 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 12:41:28,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:28,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790954683] [2023-11-17 12:41:28,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790954683] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:28,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017257236] [2023-11-17 12:41:28,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:41:28,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:28,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:28,537 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 12:41:28,543 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 12:41:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:28,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 12:41:28,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:28,662 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 12:41:28,699 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 12:41:28,722 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 12:41:29,240 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 42 treesize of output 30 [2023-11-17 12:41:29,256 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 12:41:29,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:41:30,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:30,571 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 55 treesize of output 44 [2023-11-17 12:41:30,578 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 12:41:30,578 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 94 treesize of output 81 [2023-11-17 12:41:30,585 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:41:30,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 54 [2023-11-17 12:41:30,592 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:41:30,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2023-11-17 12:41:30,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:30,615 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 12:41:30,632 INFO L349 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2023-11-17 12:41:30,632 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 500 [2023-11-17 12:41:30,659 INFO L349 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2023-11-17 12:41:30,659 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 92 [2023-11-17 12:41:30,740 INFO L349 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2023-11-17 12:41:30,740 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 89 [2023-11-17 12:41:30,810 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 12:41:30,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017257236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:41:30,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:41:30,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2023-11-17 12:41:30,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915852453] [2023-11-17 12:41:30,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:41:30,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:41:30,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:30,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:41:30,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=346, Unknown=2, NotChecked=0, Total=420 [2023-11-17 12:41:30,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:41:30,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 179 transitions, 2018 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:30,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:30,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:41:30,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:31,858 INFO L124 PetriNetUnfolderBase]: 402/826 cut-off events. [2023-11-17 12:41:31,858 INFO L125 PetriNetUnfolderBase]: For 3150/3150 co-relation queries the response was YES. [2023-11-17 12:41:31,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4443 conditions, 826 events. 402/826 cut-off events. For 3150/3150 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4497 event pairs, 9 based on Foata normal form. 7/793 useless extension candidates. Maximal degree in co-relation 4356. Up to 282 conditions per place. [2023-11-17 12:41:31,866 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 100 selfloop transitions, 103 changer transitions 45/248 dead transitions. [2023-11-17 12:41:31,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 248 transitions, 2807 flow [2023-11-17 12:41:31,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:41:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:41:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 191 transitions. [2023-11-17 12:41:31,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39462809917355374 [2023-11-17 12:41:31,867 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 191 transitions. [2023-11-17 12:41:31,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 191 transitions. [2023-11-17 12:41:31,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:31,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 191 transitions. [2023-11-17 12:41:31,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 8.681818181818182) internal successors, (191), 22 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:31,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 22.0) internal successors, (506), 23 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:31,869 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 22.0) internal successors, (506), 23 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:31,870 INFO L175 Difference]: Start difference. First operand has 165 places, 179 transitions, 2018 flow. Second operand 22 states and 191 transitions. [2023-11-17 12:41:31,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 248 transitions, 2807 flow [2023-11-17 12:41:31,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 248 transitions, 2540 flow, removed 50 selfloop flow, removed 22 redundant places. [2023-11-17 12:41:31,894 INFO L231 Difference]: Finished difference. Result has 160 places, 154 transitions, 1765 flow [2023-11-17 12:41:31,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1765, PETRI_PLACES=160, PETRI_TRANSITIONS=154} [2023-11-17 12:41:31,895 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 139 predicate places. [2023-11-17 12:41:31,895 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 154 transitions, 1765 flow [2023-11-17 12:41:31,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:31,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:31,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:31,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-17 12:41:32,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:32,102 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 12:41:32,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:32,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1182589867, now seen corresponding path program 1 times [2023-11-17 12:41:32,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:32,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712693829] [2023-11-17 12:41:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:32,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:32,268 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 12:41:32,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:32,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712693829] [2023-11-17 12:41:32,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712693829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:32,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331488520] [2023-11-17 12:41:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:32,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:32,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:32,270 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 12:41:32,288 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 12:41:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:32,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:41:32,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:32,479 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 12:41:32,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:41:32,554 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 12:41:32,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331488520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:41:32,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:41:32,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 12:41:32,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385513899] [2023-11-17 12:41:32,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:41:32,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:41:32,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:41:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:41:32,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:41:32,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 154 transitions, 1765 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:32,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:32,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:41:32,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:33,306 INFO L124 PetriNetUnfolderBase]: 365/744 cut-off events. [2023-11-17 12:41:33,306 INFO L125 PetriNetUnfolderBase]: For 2823/2823 co-relation queries the response was YES. [2023-11-17 12:41:33,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4042 conditions, 744 events. 365/744 cut-off events. For 2823/2823 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3878 event pairs, 27 based on Foata normal form. 8/713 useless extension candidates. Maximal degree in co-relation 4004. Up to 176 conditions per place. [2023-11-17 12:41:33,311 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 112 selfloop transitions, 108 changer transitions 0/220 dead transitions. [2023-11-17 12:41:33,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 220 transitions, 2534 flow [2023-11-17 12:41:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:41:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:41:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 144 transitions. [2023-11-17 12:41:33,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2023-11-17 12:41:33,312 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 144 transitions. [2023-11-17 12:41:33,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 144 transitions. [2023-11-17 12:41:33,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:33,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 144 transitions. [2023-11-17 12:41:33,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 9.0) internal successors, (144), 16 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:33,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 22.0) internal successors, (374), 17 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:33,314 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 22.0) internal successors, (374), 17 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:33,314 INFO L175 Difference]: Start difference. First operand has 160 places, 154 transitions, 1765 flow. Second operand 16 states and 144 transitions. [2023-11-17 12:41:33,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 220 transitions, 2534 flow [2023-11-17 12:41:33,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 220 transitions, 2295 flow, removed 15 selfloop flow, removed 21 redundant places. [2023-11-17 12:41:33,335 INFO L231 Difference]: Finished difference. Result has 138 places, 170 transitions, 1925 flow [2023-11-17 12:41:33,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1925, PETRI_PLACES=138, PETRI_TRANSITIONS=170} [2023-11-17 12:41:33,335 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 117 predicate places. [2023-11-17 12:41:33,335 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 170 transitions, 1925 flow [2023-11-17 12:41:33,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:33,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:33,336 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:33,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-17 12:41:33,542 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,SelfDestructingSolverStorable14 [2023-11-17 12:41:33,542 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 12:41:33,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:33,543 INFO L85 PathProgramCache]: Analyzing trace with hash 473024443, now seen corresponding path program 8 times [2023-11-17 12:41:33,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:33,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479510396] [2023-11-17 12:41:33,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:33,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:41:33,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:33,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479510396] [2023-11-17 12:41:33,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479510396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:33,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417405066] [2023-11-17 12:41:33,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:41:33,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:33,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:33,725 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 12:41:33,746 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 12:41:33,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:41:33,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:41:33,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 12:41:33,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:33,886 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 12:41:33,929 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 12:41:33,970 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 12:41:34,848 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 12:41:34,849 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 12:41:34,883 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 12:41:34,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:41:37,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:37,799 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 116 treesize of output 80 [2023-11-17 12:41:37,806 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:37,806 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 236 treesize of output 224 [2023-11-17 12:41:37,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:37,824 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 113 treesize of output 109 [2023-11-17 12:41:37,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:37,837 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 180 treesize of output 152 [2023-11-17 12:41:38,107 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-11-17 12:41:38,480 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:41:38,481 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 1 [2023-11-17 12:41:38,526 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 12:41:38,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417405066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:41:38,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:41:38,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-17 12:41:38,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675613407] [2023-11-17 12:41:38,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:41:38,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:41:38,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:38,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:41:38,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=348, Unknown=1, NotChecked=0, Total=420 [2023-11-17 12:41:38,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:41:38,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 170 transitions, 1925 flow. Second operand has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:38,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:38,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:41:38,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:39,343 INFO L124 PetriNetUnfolderBase]: 365/747 cut-off events. [2023-11-17 12:41:39,343 INFO L125 PetriNetUnfolderBase]: For 2961/2961 co-relation queries the response was YES. [2023-11-17 12:41:39,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4023 conditions, 747 events. 365/747 cut-off events. For 2961/2961 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3945 event pairs, 31 based on Foata normal form. 7/753 useless extension candidates. Maximal degree in co-relation 3985. Up to 494 conditions per place. [2023-11-17 12:41:39,348 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 116 selfloop transitions, 64 changer transitions 29/209 dead transitions. [2023-11-17 12:41:39,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 209 transitions, 2468 flow [2023-11-17 12:41:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:41:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:41:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 148 transitions. [2023-11-17 12:41:39,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35406698564593303 [2023-11-17 12:41:39,350 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 148 transitions. [2023-11-17 12:41:39,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 148 transitions. [2023-11-17 12:41:39,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:39,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 148 transitions. [2023-11-17 12:41:39,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:39,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 22.0) internal successors, (440), 20 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:39,352 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 22.0) internal successors, (440), 20 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:39,352 INFO L175 Difference]: Start difference. First operand has 138 places, 170 transitions, 1925 flow. Second operand 19 states and 148 transitions. [2023-11-17 12:41:39,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 209 transitions, 2468 flow [2023-11-17 12:41:39,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 209 transitions, 2350 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-11-17 12:41:39,368 INFO L231 Difference]: Finished difference. Result has 155 places, 160 transitions, 1840 flow [2023-11-17 12:41:39,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1840, PETRI_PLACES=155, PETRI_TRANSITIONS=160} [2023-11-17 12:41:39,369 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 134 predicate places. [2023-11-17 12:41:39,369 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 160 transitions, 1840 flow [2023-11-17 12:41:39,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:39,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:39,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:39,379 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 12:41:39,573 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,SelfDestructingSolverStorable15 [2023-11-17 12:41:39,574 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 12:41:39,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:39,574 INFO L85 PathProgramCache]: Analyzing trace with hash -262484043, now seen corresponding path program 9 times [2023-11-17 12:41:39,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:39,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575740156] [2023-11-17 12:41:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:39,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:39,768 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 12:41:39,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:39,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575740156] [2023-11-17 12:41:39,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575740156] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:39,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269979786] [2023-11-17 12:41:39,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:41:39,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:39,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:39,773 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 12:41:39,796 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 12:41:39,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:41:39,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:41:39,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 12:41:39,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:40,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:40,137 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 178 treesize of output 182 [2023-11-17 12:41:40,691 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 12:41:40,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:41:41,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:41,649 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 198 treesize of output 151 [2023-11-17 12:41:42,177 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 12:41:42,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269979786] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:41:42,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:41:42,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 18 [2023-11-17 12:41:42,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476800662] [2023-11-17 12:41:42,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:41:42,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:41:42,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:42,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:41:42,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:41:42,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:41:42,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 160 transitions, 1840 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:42,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:42,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:41:42,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:44,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:41:45,643 INFO L124 PetriNetUnfolderBase]: 414/821 cut-off events. [2023-11-17 12:41:45,643 INFO L125 PetriNetUnfolderBase]: For 4000/4000 co-relation queries the response was YES. [2023-11-17 12:41:45,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4625 conditions, 821 events. 414/821 cut-off events. For 4000/4000 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4397 event pairs, 32 based on Foata normal form. 5/825 useless extension candidates. Maximal degree in co-relation 4582. Up to 214 conditions per place. [2023-11-17 12:41:45,649 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 134 selfloop transitions, 104 changer transitions 5/243 dead transitions. [2023-11-17 12:41:45,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 243 transitions, 2924 flow [2023-11-17 12:41:45,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:41:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:41:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 166 transitions. [2023-11-17 12:41:45,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44385026737967914 [2023-11-17 12:41:45,659 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 166 transitions. [2023-11-17 12:41:45,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 166 transitions. [2023-11-17 12:41:45,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:45,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 166 transitions. [2023-11-17 12:41:45,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 9.764705882352942) internal successors, (166), 17 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:45,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 22.0) internal successors, (396), 18 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:45,665 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 22.0) internal successors, (396), 18 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:45,665 INFO L175 Difference]: Start difference. First operand has 155 places, 160 transitions, 1840 flow. Second operand 17 states and 166 transitions. [2023-11-17 12:41:45,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 243 transitions, 2924 flow [2023-11-17 12:41:45,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 243 transitions, 2616 flow, removed 27 selfloop flow, removed 14 redundant places. [2023-11-17 12:41:45,684 INFO L231 Difference]: Finished difference. Result has 144 places, 188 transitions, 2191 flow [2023-11-17 12:41:45,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1604, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2191, PETRI_PLACES=144, PETRI_TRANSITIONS=188} [2023-11-17 12:41:45,685 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 123 predicate places. [2023-11-17 12:41:45,685 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 188 transitions, 2191 flow [2023-11-17 12:41:45,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:45,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:45,685 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:45,691 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 12:41:45,886 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,SelfDestructingSolverStorable16 [2023-11-17 12:41:45,886 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 12:41:45,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:45,886 INFO L85 PathProgramCache]: Analyzing trace with hash -821113657, now seen corresponding path program 2 times [2023-11-17 12:41:45,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:45,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122609209] [2023-11-17 12:41:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:45,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:46,084 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 12:41:46,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:46,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122609209] [2023-11-17 12:41:46,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122609209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:46,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627178667] [2023-11-17 12:41:46,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:41:46,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:46,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:46,089 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 12:41:46,113 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 12:41:46,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:41:46,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:41:46,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:41:46,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:46,346 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 12:41:46,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:41:46,458 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 12:41:46,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627178667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:41:46,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:41:46,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 12:41:46,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631381784] [2023-11-17 12:41:46,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:41:46,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:41:46,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:46,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:41:46,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:41:46,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:41:46,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 188 transitions, 2191 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:46,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:46,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:41:46,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:47,435 INFO L124 PetriNetUnfolderBase]: 485/933 cut-off events. [2023-11-17 12:41:47,436 INFO L125 PetriNetUnfolderBase]: For 4437/4437 co-relation queries the response was YES. [2023-11-17 12:41:47,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5161 conditions, 933 events. 485/933 cut-off events. For 4437/4437 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5002 event pairs, 59 based on Foata normal form. 10/943 useless extension candidates. Maximal degree in co-relation 5116. Up to 295 conditions per place. [2023-11-17 12:41:47,445 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 154 selfloop transitions, 113 changer transitions 0/267 dead transitions. [2023-11-17 12:41:47,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 267 transitions, 3148 flow [2023-11-17 12:41:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:41:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:41:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 163 transitions. [2023-11-17 12:41:47,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2023-11-17 12:41:47,455 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 163 transitions. [2023-11-17 12:41:47,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 163 transitions. [2023-11-17 12:41:47,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:47,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 163 transitions. [2023-11-17 12:41:47,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.1875) internal successors, (163), 16 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:47,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 22.0) internal successors, (374), 17 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:47,457 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 22.0) internal successors, (374), 17 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:47,457 INFO L175 Difference]: Start difference. First operand has 144 places, 188 transitions, 2191 flow. Second operand 16 states and 163 transitions. [2023-11-17 12:41:47,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 267 transitions, 3148 flow [2023-11-17 12:41:47,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 267 transitions, 2963 flow, removed 30 selfloop flow, removed 8 redundant places. [2023-11-17 12:41:47,486 INFO L231 Difference]: Finished difference. Result has 154 places, 210 transitions, 2532 flow [2023-11-17 12:41:47,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2532, PETRI_PLACES=154, PETRI_TRANSITIONS=210} [2023-11-17 12:41:47,486 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 133 predicate places. [2023-11-17 12:41:47,486 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 210 transitions, 2532 flow [2023-11-17 12:41:47,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:47,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:47,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:47,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-17 12:41:47,693 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,SelfDestructingSolverStorable17 [2023-11-17 12:41:47,694 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 12:41:47,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:47,694 INFO L85 PathProgramCache]: Analyzing trace with hash -871450837, now seen corresponding path program 3 times [2023-11-17 12:41:47,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:47,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44988697] [2023-11-17 12:41:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:47,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:47,854 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 12:41:47,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:47,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44988697] [2023-11-17 12:41:47,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44988697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:47,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052403089] [2023-11-17 12:41:47,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:41:47,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:47,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:47,857 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 12:41:47,885 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 12:41:48,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:41:48,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:41:48,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:41:48,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:48,100 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 12:41:48,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:41:48,216 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 12:41:48,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052403089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:41:48,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:41:48,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 12:41:48,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406836214] [2023-11-17 12:41:48,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:41:48,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:41:48,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:48,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:41:48,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:41:48,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:41:48,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 210 transitions, 2532 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:48,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:48,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:41:48,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:48,990 INFO L124 PetriNetUnfolderBase]: 473/917 cut-off events. [2023-11-17 12:41:48,990 INFO L125 PetriNetUnfolderBase]: For 4742/4742 co-relation queries the response was YES. [2023-11-17 12:41:48,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5314 conditions, 917 events. 473/917 cut-off events. For 4742/4742 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4995 event pairs, 59 based on Foata normal form. 28/944 useless extension candidates. Maximal degree in co-relation 5267. Up to 295 conditions per place. [2023-11-17 12:41:48,998 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 157 selfloop transitions, 114 changer transitions 0/271 dead transitions. [2023-11-17 12:41:48,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 271 transitions, 3259 flow [2023-11-17 12:41:48,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:41:48,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:41:48,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 185 transitions. [2023-11-17 12:41:48,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44258373205741625 [2023-11-17 12:41:48,999 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 185 transitions. [2023-11-17 12:41:48,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 185 transitions. [2023-11-17 12:41:48,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:48,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 185 transitions. [2023-11-17 12:41:49,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 9.736842105263158) internal successors, (185), 19 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:49,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 22.0) internal successors, (440), 20 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:49,001 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 22.0) internal successors, (440), 20 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:49,001 INFO L175 Difference]: Start difference. First operand has 154 places, 210 transitions, 2532 flow. Second operand 19 states and 185 transitions. [2023-11-17 12:41:49,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 271 transitions, 3259 flow [2023-11-17 12:41:49,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 271 transitions, 3134 flow, removed 28 selfloop flow, removed 5 redundant places. [2023-11-17 12:41:49,032 INFO L231 Difference]: Finished difference. Result has 168 places, 210 transitions, 2651 flow [2023-11-17 12:41:49,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2344, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2651, PETRI_PLACES=168, PETRI_TRANSITIONS=210} [2023-11-17 12:41:49,032 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 147 predicate places. [2023-11-17 12:41:49,032 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 210 transitions, 2651 flow [2023-11-17 12:41:49,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:49,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:49,033 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:49,038 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 12:41:49,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:49,234 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 12:41:49,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:49,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1078197765, now seen corresponding path program 4 times [2023-11-17 12:41:49,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:49,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218746230] [2023-11-17 12:41:49,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:49,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:49,405 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 12:41:49,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:49,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218746230] [2023-11-17 12:41:49,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218746230] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:49,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493379953] [2023-11-17 12:41:49,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:41:49,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:49,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:49,409 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 12:41:49,431 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 12:41:49,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:41:49,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:41:49,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:41:49,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:49,731 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 12:41:49,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:41:49,787 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 12:41:49,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493379953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:41:49,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:41:49,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 12:41:49,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040518555] [2023-11-17 12:41:49,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:41:49,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:41:49,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:49,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:41:49,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:41:49,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:41:49,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 210 transitions, 2651 flow. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:49,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:49,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:41:49,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:50,619 INFO L124 PetriNetUnfolderBase]: 701/1331 cut-off events. [2023-11-17 12:41:50,619 INFO L125 PetriNetUnfolderBase]: For 6767/6767 co-relation queries the response was YES. [2023-11-17 12:41:50,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7683 conditions, 1331 events. 701/1331 cut-off events. For 6767/6767 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7625 event pairs, 34 based on Foata normal form. 6/1336 useless extension candidates. Maximal degree in co-relation 7635. Up to 418 conditions per place. [2023-11-17 12:41:50,627 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 189 selfloop transitions, 161 changer transitions 0/350 dead transitions. [2023-11-17 12:41:50,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 350 transitions, 4635 flow [2023-11-17 12:41:50,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:41:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:41:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 158 transitions. [2023-11-17 12:41:50,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2023-11-17 12:41:50,629 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 158 transitions. [2023-11-17 12:41:50,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 158 transitions. [2023-11-17 12:41:50,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:50,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 158 transitions. [2023-11-17 12:41:50,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 9.875) internal successors, (158), 16 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:50,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 22.0) internal successors, (374), 17 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:50,631 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 22.0) internal successors, (374), 17 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:50,631 INFO L175 Difference]: Start difference. First operand has 168 places, 210 transitions, 2651 flow. Second operand 16 states and 158 transitions. [2023-11-17 12:41:50,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 350 transitions, 4635 flow [2023-11-17 12:41:50,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 350 transitions, 4468 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-17 12:41:50,676 INFO L231 Difference]: Finished difference. Result has 179 places, 272 transitions, 3577 flow [2023-11-17 12:41:50,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3577, PETRI_PLACES=179, PETRI_TRANSITIONS=272} [2023-11-17 12:41:50,677 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 158 predicate places. [2023-11-17 12:41:50,677 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 272 transitions, 3577 flow [2023-11-17 12:41:50,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:50,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:50,677 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:50,688 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 12:41:50,888 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,SelfDestructingSolverStorable19 [2023-11-17 12:41:50,889 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 12:41:50,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:50,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1085269813, now seen corresponding path program 5 times [2023-11-17 12:41:50,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:50,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028354253] [2023-11-17 12:41:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:50,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:51,054 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 12:41:51,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:51,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028354253] [2023-11-17 12:41:51,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028354253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:51,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598315311] [2023-11-17 12:41:51,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:41:51,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:51,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:51,057 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 12:41:51,082 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 12:41:51,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:41:51,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:41:51,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:41:51,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:51,275 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 12:41:51,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:41:51,390 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 12:41:51,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598315311] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:41:51,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:41:51,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 12:41:51,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238907793] [2023-11-17 12:41:51,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:41:51,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:41:51,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:51,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:41:51,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:41:51,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:41:51,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 272 transitions, 3577 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:51,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:51,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:41:51,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:52,257 INFO L124 PetriNetUnfolderBase]: 705/1351 cut-off events. [2023-11-17 12:41:52,258 INFO L125 PetriNetUnfolderBase]: For 7836/7836 co-relation queries the response was YES. [2023-11-17 12:41:52,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8181 conditions, 1351 events. 705/1351 cut-off events. For 7836/7836 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7779 event pairs, 86 based on Foata normal form. 24/1374 useless extension candidates. Maximal degree in co-relation 8130. Up to 510 conditions per place. [2023-11-17 12:41:52,266 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 177 selfloop transitions, 156 changer transitions 0/333 dead transitions. [2023-11-17 12:41:52,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 333 transitions, 4597 flow [2023-11-17 12:41:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:41:52,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:41:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 144 transitions. [2023-11-17 12:41:52,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2023-11-17 12:41:52,267 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 144 transitions. [2023-11-17 12:41:52,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 144 transitions. [2023-11-17 12:41:52,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:52,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 144 transitions. [2023-11-17 12:41:52,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 9.0) internal successors, (144), 16 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:52,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 22.0) internal successors, (374), 17 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:52,269 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 22.0) internal successors, (374), 17 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:52,269 INFO L175 Difference]: Start difference. First operand has 179 places, 272 transitions, 3577 flow. Second operand 16 states and 144 transitions. [2023-11-17 12:41:52,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 333 transitions, 4597 flow [2023-11-17 12:41:52,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 333 transitions, 4244 flow, removed 88 selfloop flow, removed 6 redundant places. [2023-11-17 12:41:52,313 INFO L231 Difference]: Finished difference. Result has 191 places, 282 transitions, 3736 flow [2023-11-17 12:41:52,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3223, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3736, PETRI_PLACES=191, PETRI_TRANSITIONS=282} [2023-11-17 12:41:52,314 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 170 predicate places. [2023-11-17 12:41:52,314 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 282 transitions, 3736 flow [2023-11-17 12:41:52,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:52,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:52,314 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:52,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 12:41:52,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:52,515 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 12:41:52,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:52,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1344222631, now seen corresponding path program 6 times [2023-11-17 12:41:52,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:52,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915590708] [2023-11-17 12:41:52,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:52,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:52,719 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 12:41:52,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:52,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915590708] [2023-11-17 12:41:52,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915590708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:52,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957736391] [2023-11-17 12:41:52,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:41:52,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:52,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:52,721 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 12:41:52,741 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 12:41:52,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:41:52,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:41:52,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 12:41:52,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:53,008 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 12:41:53,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:41:53,058 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:53,059 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 147 treesize of output 139 [2023-11-17 12:41:53,176 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 12:41:53,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957736391] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:41:53,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:41:53,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 12:41:53,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842960648] [2023-11-17 12:41:53,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:41:53,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:41:53,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:53,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:41:53,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:41:53,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:41:53,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 282 transitions, 3736 flow. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:53,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:53,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:41:53,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:53,997 INFO L124 PetriNetUnfolderBase]: 824/1596 cut-off events. [2023-11-17 12:41:53,997 INFO L125 PetriNetUnfolderBase]: For 10626/10626 co-relation queries the response was YES. [2023-11-17 12:41:54,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9683 conditions, 1596 events. 824/1596 cut-off events. For 10626/10626 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9574 event pairs, 38 based on Foata normal form. 16/1611 useless extension candidates. Maximal degree in co-relation 9630. Up to 486 conditions per place. [2023-11-17 12:41:54,006 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 213 selfloop transitions, 209 changer transitions 0/422 dead transitions. [2023-11-17 12:41:54,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 422 transitions, 5895 flow [2023-11-17 12:41:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:41:54,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:41:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 194 transitions. [2023-11-17 12:41:54,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2023-11-17 12:41:54,011 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 194 transitions. [2023-11-17 12:41:54,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 194 transitions. [2023-11-17 12:41:54,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:54,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 194 transitions. [2023-11-17 12:41:54,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 9.238095238095237) internal successors, (194), 21 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:54,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 22.0) internal successors, (484), 22 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:54,018 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 22.0) internal successors, (484), 22 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:54,018 INFO L175 Difference]: Start difference. First operand has 191 places, 282 transitions, 3736 flow. Second operand 21 states and 194 transitions. [2023-11-17 12:41:54,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 422 transitions, 5895 flow [2023-11-17 12:41:54,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 422 transitions, 5777 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-11-17 12:41:54,083 INFO L231 Difference]: Finished difference. Result has 215 places, 327 transitions, 4875 flow [2023-11-17 12:41:54,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4875, PETRI_PLACES=215, PETRI_TRANSITIONS=327} [2023-11-17 12:41:54,083 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 194 predicate places. [2023-11-17 12:41:54,084 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 327 transitions, 4875 flow [2023-11-17 12:41:54,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:54,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:54,084 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:54,091 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 12:41:54,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:54,291 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 12:41:54,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:54,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1394559811, now seen corresponding path program 7 times [2023-11-17 12:41:54,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:54,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318524913] [2023-11-17 12:41:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:54,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:54,445 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 12:41:54,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:54,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318524913] [2023-11-17 12:41:54,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318524913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:54,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424886685] [2023-11-17 12:41:54,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:41:54,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:54,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:54,450 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 12:41:54,473 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 12:41:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:54,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:41:54,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:54,715 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 12:41:54,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:41:54,783 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 12:41:54,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424886685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:41:54,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:41:54,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 12:41:54,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763315543] [2023-11-17 12:41:54,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:41:54,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:41:54,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:54,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:41:54,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:41:54,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:41:54,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 327 transitions, 4875 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:54,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:54,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:41:54,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:55,636 INFO L124 PetriNetUnfolderBase]: 820/1568 cut-off events. [2023-11-17 12:41:55,637 INFO L125 PetriNetUnfolderBase]: For 13125/13125 co-relation queries the response was YES. [2023-11-17 12:41:55,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10489 conditions, 1568 events. 820/1568 cut-off events. For 13125/13125 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9291 event pairs, 46 based on Foata normal form. 8/1575 useless extension candidates. Maximal degree in co-relation 10427. Up to 482 conditions per place. [2023-11-17 12:41:55,648 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 204 selfloop transitions, 202 changer transitions 0/406 dead transitions. [2023-11-17 12:41:55,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 406 transitions, 6311 flow [2023-11-17 12:41:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:41:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:41:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 173 transitions. [2023-11-17 12:41:55,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4138755980861244 [2023-11-17 12:41:55,650 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 173 transitions. [2023-11-17 12:41:55,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 173 transitions. [2023-11-17 12:41:55,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:55,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 173 transitions. [2023-11-17 12:41:55,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 9.105263157894736) internal successors, (173), 19 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:55,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 22.0) internal successors, (440), 20 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:55,651 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 22.0) internal successors, (440), 20 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:55,651 INFO L175 Difference]: Start difference. First operand has 215 places, 327 transitions, 4875 flow. Second operand 19 states and 173 transitions. [2023-11-17 12:41:55,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 406 transitions, 6311 flow [2023-11-17 12:41:55,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 406 transitions, 6083 flow, removed 43 selfloop flow, removed 6 redundant places. [2023-11-17 12:41:55,740 INFO L231 Difference]: Finished difference. Result has 226 places, 324 transitions, 4996 flow [2023-11-17 12:41:55,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4571, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4996, PETRI_PLACES=226, PETRI_TRANSITIONS=324} [2023-11-17 12:41:55,741 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 205 predicate places. [2023-11-17 12:41:55,741 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 324 transitions, 4996 flow [2023-11-17 12:41:55,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:55,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:55,741 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:55,748 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 12:41:55,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-17 12:41:55,948 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 12:41:55,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:55,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1412993837, now seen corresponding path program 8 times [2023-11-17 12:41:55,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:55,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586626596] [2023-11-17 12:41:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:55,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:56,114 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 12:41:56,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:56,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586626596] [2023-11-17 12:41:56,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586626596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:56,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479712600] [2023-11-17 12:41:56,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:41:56,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:56,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:56,116 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 12:41:56,138 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 12:41:56,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:41:56,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:41:56,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:41:56,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:56,316 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 12:41:56,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:41:56,396 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 12:41:56,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479712600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:41:56,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:41:56,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 12:41:56,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669770578] [2023-11-17 12:41:56,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:41:56,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:41:56,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:56,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:41:56,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:41:56,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:41:56,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 324 transitions, 4996 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:56,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:56,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:41:56,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:57,515 INFO L124 PetriNetUnfolderBase]: 900/1694 cut-off events. [2023-11-17 12:41:57,515 INFO L125 PetriNetUnfolderBase]: For 15970/15970 co-relation queries the response was YES. [2023-11-17 12:41:57,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11816 conditions, 1694 events. 900/1694 cut-off events. For 15970/15970 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 9991 event pairs, 161 based on Foata normal form. 10/1703 useless extension candidates. Maximal degree in co-relation 11755. Up to 985 conditions per place. [2023-11-17 12:41:57,525 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 239 selfloop transitions, 167 changer transitions 0/406 dead transitions. [2023-11-17 12:41:57,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 406 transitions, 6594 flow [2023-11-17 12:41:57,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:41:57,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:41:57,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 138 transitions. [2023-11-17 12:41:57,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2023-11-17 12:41:57,527 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 138 transitions. [2023-11-17 12:41:57,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 138 transitions. [2023-11-17 12:41:57,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:57,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 138 transitions. [2023-11-17 12:41:57,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 9.857142857142858) internal successors, (138), 14 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:57,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 22.0) internal successors, (330), 15 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:57,528 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 22.0) internal successors, (330), 15 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:57,528 INFO L175 Difference]: Start difference. First operand has 226 places, 324 transitions, 4996 flow. Second operand 14 states and 138 transitions. [2023-11-17 12:41:57,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 406 transitions, 6594 flow [2023-11-17 12:41:57,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 406 transitions, 6155 flow, removed 8 selfloop flow, removed 16 redundant places. [2023-11-17 12:41:57,593 INFO L231 Difference]: Finished difference. Result has 229 places, 353 transitions, 5590 flow [2023-11-17 12:41:57,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5590, PETRI_PLACES=229, PETRI_TRANSITIONS=353} [2023-11-17 12:41:57,594 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 208 predicate places. [2023-11-17 12:41:57,594 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 353 transitions, 5590 flow [2023-11-17 12:41:57,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:57,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:57,594 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:57,601 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 12:41:57,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:57,795 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 12:41:57,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:57,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1362656657, now seen corresponding path program 9 times [2023-11-17 12:41:57,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:57,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963299887] [2023-11-17 12:41:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:57,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:57,953 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 12:41:57,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:57,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963299887] [2023-11-17 12:41:57,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963299887] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:57,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917470525] [2023-11-17 12:41:57,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:41:57,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:57,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:57,954 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 12:41:57,956 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 12:41:58,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:41:58,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:41:58,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 12:41:58,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:58,200 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 12:41:58,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:41:58,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:41:58,263 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 147 treesize of output 139 [2023-11-17 12:41:58,452 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 12:41:58,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917470525] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:41:58,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:41:58,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 12:41:58,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957059425] [2023-11-17 12:41:58,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:41:58,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:41:58,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:41:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:41:58,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:41:58,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 353 transitions, 5590 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:58,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:41:58,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:59,382 INFO L124 PetriNetUnfolderBase]: 887/1683 cut-off events. [2023-11-17 12:41:59,382 INFO L125 PetriNetUnfolderBase]: For 16656/16656 co-relation queries the response was YES. [2023-11-17 12:41:59,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11767 conditions, 1683 events. 887/1683 cut-off events. For 16656/16656 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9950 event pairs, 165 based on Foata normal form. 28/1710 useless extension candidates. Maximal degree in co-relation 11701. Up to 989 conditions per place. [2023-11-17 12:41:59,392 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 241 selfloop transitions, 166 changer transitions 0/407 dead transitions. [2023-11-17 12:41:59,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 407 transitions, 6631 flow [2023-11-17 12:41:59,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:41:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:41:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 158 transitions. [2023-11-17 12:41:59,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2023-11-17 12:41:59,394 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 158 transitions. [2023-11-17 12:41:59,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 158 transitions. [2023-11-17 12:41:59,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:59,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 158 transitions. [2023-11-17 12:41:59,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 8.777777777777779) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:59,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 22.0) internal successors, (418), 19 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:59,396 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 22.0) internal successors, (418), 19 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:59,396 INFO L175 Difference]: Start difference. First operand has 229 places, 353 transitions, 5590 flow. Second operand 18 states and 158 transitions. [2023-11-17 12:41:59,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 407 transitions, 6631 flow [2023-11-17 12:41:59,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 407 transitions, 6489 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-11-17 12:41:59,476 INFO L231 Difference]: Finished difference. Result has 244 places, 354 transitions, 5842 flow [2023-11-17 12:41:59,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5317, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5842, PETRI_PLACES=244, PETRI_TRANSITIONS=354} [2023-11-17 12:41:59,476 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 223 predicate places. [2023-11-17 12:41:59,476 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 354 transitions, 5842 flow [2023-11-17 12:41:59,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:59,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:59,477 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:59,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-17 12:41:59,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:59,681 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 12:41:59,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:59,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1794269622, now seen corresponding path program 10 times [2023-11-17 12:41:59,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:59,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529510117] [2023-11-17 12:41:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:59,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:59,846 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 12:41:59,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:59,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529510117] [2023-11-17 12:41:59,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529510117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:41:59,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523351131] [2023-11-17 12:41:59,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:41:59,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:59,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:59,848 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 12:41:59,850 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 12:42:00,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:42:00,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:42:00,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:42:00,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:42:00,252 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 12:42:00,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:42:01,664 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-11-17 12:42:01,665 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 74 treesize of output 128 [2023-11-17 12:42:01,793 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 12:42:01,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523351131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:42:01,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:42:01,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 21 [2023-11-17 12:42:01,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737479495] [2023-11-17 12:42:01,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:42:01,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:42:01,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:42:01,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:42:01,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:42:01,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:42:01,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 354 transitions, 5842 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:01,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:42:01,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:42:01,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:42:10,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:42:12,382 INFO L124 PetriNetUnfolderBase]: 1638/3074 cut-off events. [2023-11-17 12:42:12,383 INFO L125 PetriNetUnfolderBase]: For 35153/35153 co-relation queries the response was YES. [2023-11-17 12:42:12,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22129 conditions, 3074 events. 1638/3074 cut-off events. For 35153/35153 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20105 event pairs, 67 based on Foata normal form. 16/3089 useless extension candidates. Maximal degree in co-relation 22059. Up to 1197 conditions per place. [2023-11-17 12:42:12,402 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 353 selfloop transitions, 370 changer transitions 16/739 dead transitions. [2023-11-17 12:42:12,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 739 transitions, 12047 flow [2023-11-17 12:42:12,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 12:42:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 12:42:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 410 transitions. [2023-11-17 12:42:12,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-11-17 12:42:12,404 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 410 transitions. [2023-11-17 12:42:12,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 410 transitions. [2023-11-17 12:42:12,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:42:12,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 410 transitions. [2023-11-17 12:42:12,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 10.0) internal successors, (410), 41 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:12,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 22.0) internal successors, (924), 42 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:12,406 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 22.0) internal successors, (924), 42 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:12,406 INFO L175 Difference]: Start difference. First operand has 244 places, 354 transitions, 5842 flow. Second operand 41 states and 410 transitions. [2023-11-17 12:42:12,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 739 transitions, 12047 flow [2023-11-17 12:42:12,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 739 transitions, 11643 flow, removed 12 selfloop flow, removed 13 redundant places. [2023-11-17 12:42:12,547 INFO L231 Difference]: Finished difference. Result has 287 places, 542 transitions, 9942 flow [2023-11-17 12:42:12,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5608, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=9942, PETRI_PLACES=287, PETRI_TRANSITIONS=542} [2023-11-17 12:42:12,547 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 266 predicate places. [2023-11-17 12:42:12,547 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 542 transitions, 9942 flow [2023-11-17 12:42:12,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:12,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:42:12,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:42:12,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 12:42:12,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:42:12,748 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 12:42:12,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:42:12,749 INFO L85 PathProgramCache]: Analyzing trace with hash 366693732, now seen corresponding path program 11 times [2023-11-17 12:42:12,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:42:12,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64148676] [2023-11-17 12:42:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:42:12,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:42:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:42:12,916 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 12:42:12,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:42:12,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64148676] [2023-11-17 12:42:12,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64148676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:42:12,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58994422] [2023-11-17 12:42:12,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:42:12,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:42:12,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:42:12,921 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 12:42:12,925 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 12:42:13,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:42:13,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:42:13,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:42:13,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:42:13,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:42:13,455 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 12:42:13,473 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 12:42:13,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:42:15,399 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:42:15,399 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 243 treesize of output 212 [2023-11-17 12:42:16,228 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 12:42:16,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58994422] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:42:16,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:42:16,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 22 [2023-11-17 12:42:16,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150026220] [2023-11-17 12:42:16,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:42:16,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:42:16,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:42:16,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:42:16,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:42:16,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:42:16,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 542 transitions, 9942 flow. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:16,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:42:16,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:42:16,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:42:25,056 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 [] [2023-11-17 12:42:30,239 INFO L124 PetriNetUnfolderBase]: 1676/3161 cut-off events. [2023-11-17 12:42:30,239 INFO L125 PetriNetUnfolderBase]: For 48600/48600 co-relation queries the response was YES. [2023-11-17 12:42:30,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25471 conditions, 3161 events. 1676/3161 cut-off events. For 48600/48600 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20866 event pairs, 64 based on Foata normal form. 10/3171 useless extension candidates. Maximal degree in co-relation 25386. Up to 1235 conditions per place. [2023-11-17 12:42:30,262 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 356 selfloop transitions, 347 changer transitions 15/718 dead transitions. [2023-11-17 12:42:30,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 718 transitions, 12756 flow [2023-11-17 12:42:30,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 12:42:30,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 12:42:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 378 transitions. [2023-11-17 12:42:30,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190687361419069 [2023-11-17 12:42:30,264 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 378 transitions. [2023-11-17 12:42:30,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 378 transitions. [2023-11-17 12:42:30,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:42:30,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 378 transitions. [2023-11-17 12:42:30,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 9.21951219512195) internal successors, (378), 41 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:30,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 22.0) internal successors, (924), 42 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:30,266 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 22.0) internal successors, (924), 42 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:30,266 INFO L175 Difference]: Start difference. First operand has 287 places, 542 transitions, 9942 flow. Second operand 41 states and 378 transitions. [2023-11-17 12:42:30,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 718 transitions, 12756 flow [2023-11-17 12:42:30,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 718 transitions, 11877 flow, removed 352 selfloop flow, removed 13 redundant places. [2023-11-17 12:42:30,530 INFO L231 Difference]: Finished difference. Result has 320 places, 578 transitions, 10688 flow [2023-11-17 12:42:30,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9141, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=10688, PETRI_PLACES=320, PETRI_TRANSITIONS=578} [2023-11-17 12:42:30,531 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 299 predicate places. [2023-11-17 12:42:30,531 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 578 transitions, 10688 flow [2023-11-17 12:42:30,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:30,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:42:30,531 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 12:42:30,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-17 12:42:30,731 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,SelfDestructingSolverStorable26 [2023-11-17 12:42:30,731 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 12:42:30,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:42:30,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1244269122, now seen corresponding path program 1 times [2023-11-17 12:42:30,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:42:30,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951662161] [2023-11-17 12:42:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:42:30,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:42:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:42:30,907 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 12:42:30,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:42:30,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951662161] [2023-11-17 12:42:30,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951662161] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:42:30,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007631267] [2023-11-17 12:42:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:42:30,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:42:30,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:42:30,913 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 12:42:30,916 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 12:42:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:42:31,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:42:31,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:42:31,319 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 12:42:31,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:42:31,491 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 12:42:31,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007631267] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:42:31,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:42:31,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:42:31,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314926075] [2023-11-17 12:42:31,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:42:31,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:42:31,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:42:31,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:42:31,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:42:31,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:42:31,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 578 transitions, 10688 flow. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:31,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:42:31,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:42:31,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:42:33,493 INFO L124 PetriNetUnfolderBase]: 1720/3228 cut-off events. [2023-11-17 12:42:33,493 INFO L125 PetriNetUnfolderBase]: For 50932/50932 co-relation queries the response was YES. [2023-11-17 12:42:33,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26115 conditions, 3228 events. 1720/3228 cut-off events. For 50932/50932 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21276 event pairs, 177 based on Foata normal form. 32/3260 useless extension candidates. Maximal degree in co-relation 26027. Up to 1179 conditions per place. [2023-11-17 12:42:33,517 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 360 selfloop transitions, 348 changer transitions 0/708 dead transitions. [2023-11-17 12:42:33,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 708 transitions, 13414 flow [2023-11-17 12:42:33,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 12:42:33,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 12:42:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 233 transitions. [2023-11-17 12:42:33,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46047430830039526 [2023-11-17 12:42:33,518 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 233 transitions. [2023-11-17 12:42:33,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 233 transitions. [2023-11-17 12:42:33,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:42:33,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 233 transitions. [2023-11-17 12:42:33,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 10.130434782608695) internal successors, (233), 23 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:33,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 22.0) internal successors, (528), 24 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:33,520 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 22.0) internal successors, (528), 24 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:33,520 INFO L175 Difference]: Start difference. First operand has 320 places, 578 transitions, 10688 flow. Second operand 23 states and 233 transitions. [2023-11-17 12:42:33,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 708 transitions, 13414 flow [2023-11-17 12:42:33,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 708 transitions, 12669 flow, removed 160 selfloop flow, removed 23 redundant places. [2023-11-17 12:42:33,805 INFO L231 Difference]: Finished difference. Result has 324 places, 607 transitions, 11478 flow [2023-11-17 12:42:33,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9993, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=11478, PETRI_PLACES=324, PETRI_TRANSITIONS=607} [2023-11-17 12:42:33,806 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 303 predicate places. [2023-11-17 12:42:33,806 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 607 transitions, 11478 flow [2023-11-17 12:42:33,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:33,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:42:33,806 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:42:33,812 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 12:42:34,012 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,SelfDestructingSolverStorable27 [2023-11-17 12:42:34,013 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 12:42:34,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:42:34,013 INFO L85 PathProgramCache]: Analyzing trace with hash 169369876, now seen corresponding path program 12 times [2023-11-17 12:42:34,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:42:34,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831551894] [2023-11-17 12:42:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:42:34,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:42:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:42:34,165 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 12:42:34,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:42:34,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831551894] [2023-11-17 12:42:34,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831551894] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:42:34,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090745351] [2023-11-17 12:42:34,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:42:34,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:42:34,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:42:34,169 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 12:42:34,192 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 12:42:34,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:42:34,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:42:34,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-17 12:42:34,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:42:34,474 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 12:42:34,514 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 12:42:34,554 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 12:42:34,930 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-17 12:42:34,930 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 73 treesize of output 40 [2023-11-17 12:42:34,971 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 12:42:34,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:42:40,841 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 12:42:40,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090745351] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:42:40,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:42:40,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 7] total 23 [2023-11-17 12:42:40,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016227582] [2023-11-17 12:42:40,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:42:40,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:42:40,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:42:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:42:40,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:42:40,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:42:40,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 607 transitions, 11478 flow. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:40,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:42:40,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:42:40,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:42:44,584 INFO L124 PetriNetUnfolderBase]: 1797/3407 cut-off events. [2023-11-17 12:42:44,584 INFO L125 PetriNetUnfolderBase]: For 53461/53461 co-relation queries the response was YES. [2023-11-17 12:42:44,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27491 conditions, 3407 events. 1797/3407 cut-off events. For 53461/53461 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23042 event pairs, 90 based on Foata normal form. 10/3417 useless extension candidates. Maximal degree in co-relation 27401. Up to 1862 conditions per place. [2023-11-17 12:42:44,608 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 395 selfloop transitions, 336 changer transitions 12/743 dead transitions. [2023-11-17 12:42:44,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 743 transitions, 14085 flow [2023-11-17 12:42:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-17 12:42:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-17 12:42:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 322 transitions. [2023-11-17 12:42:44,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38516746411483255 [2023-11-17 12:42:44,610 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 322 transitions. [2023-11-17 12:42:44,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 322 transitions. [2023-11-17 12:42:44,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:42:44,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 322 transitions. [2023-11-17 12:42:44,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 8.473684210526315) internal successors, (322), 38 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:44,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 22.0) internal successors, (858), 39 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:44,612 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 22.0) internal successors, (858), 39 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:44,612 INFO L175 Difference]: Start difference. First operand has 324 places, 607 transitions, 11478 flow. Second operand 38 states and 322 transitions. [2023-11-17 12:42:44,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 743 transitions, 14085 flow [2023-11-17 12:42:44,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 743 transitions, 13665 flow, removed 90 selfloop flow, removed 7 redundant places. [2023-11-17 12:42:44,873 INFO L231 Difference]: Finished difference. Result has 363 places, 648 transitions, 12949 flow [2023-11-17 12:42:44,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11070, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=12949, PETRI_PLACES=363, PETRI_TRANSITIONS=648} [2023-11-17 12:42:44,875 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 342 predicate places. [2023-11-17 12:42:44,875 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 648 transitions, 12949 flow [2023-11-17 12:42:44,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:44,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:42:44,875 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:42:44,881 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 12:42:45,081 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,SelfDestructingSolverStorable28 [2023-11-17 12:42:45,081 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 12:42:45,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:42:45,081 INFO L85 PathProgramCache]: Analyzing trace with hash -733617640, now seen corresponding path program 13 times [2023-11-17 12:42:45,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:42:45,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030637235] [2023-11-17 12:42:45,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:42:45,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:42:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:42:45,243 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 12:42:45,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:42:45,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030637235] [2023-11-17 12:42:45,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030637235] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:42:45,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215284236] [2023-11-17 12:42:45,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:42:45,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:42:45,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:42:45,249 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 12:42:45,252 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 12:42:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:42:45,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 12:42:45,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:42:45,676 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 12:42:45,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:42:48,416 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:42:48,417 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 289 treesize of output 250 [2023-11-17 12:42:51,588 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 12:42:51,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215284236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:42:51,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:42:51,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 21 [2023-11-17 12:42:51,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764098387] [2023-11-17 12:42:51,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:42:51,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:42:51,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:42:51,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:42:51,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:42:51,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:42:51,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 648 transitions, 12949 flow. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:51,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:42:51,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:42:51,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:43:01,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:43:05,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:43:10,951 INFO L124 PetriNetUnfolderBase]: 2113/4155 cut-off events. [2023-11-17 12:43:10,951 INFO L125 PetriNetUnfolderBase]: For 74767/74767 co-relation queries the response was YES. [2023-11-17 12:43:10,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34845 conditions, 4155 events. 2113/4155 cut-off events. For 74767/74767 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 30456 event pairs, 94 based on Foata normal form. 12/4167 useless extension candidates. Maximal degree in co-relation 34746. Up to 1982 conditions per place. [2023-11-17 12:43:10,985 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 487 selfloop transitions, 343 changer transitions 17/847 dead transitions. [2023-11-17 12:43:10,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 847 transitions, 17367 flow [2023-11-17 12:43:10,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 12:43:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 12:43:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 262 transitions. [2023-11-17 12:43:10,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106583072100313 [2023-11-17 12:43:10,987 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 262 transitions. [2023-11-17 12:43:10,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 262 transitions. [2023-11-17 12:43:10,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:43:10,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 262 transitions. [2023-11-17 12:43:10,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 9.03448275862069) internal successors, (262), 29 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:43:10,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 22.0) internal successors, (660), 30 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:43:10,989 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 22.0) internal successors, (660), 30 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:43:10,989 INFO L175 Difference]: Start difference. First operand has 363 places, 648 transitions, 12949 flow. Second operand 29 states and 262 transitions. [2023-11-17 12:43:10,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 847 transitions, 17367 flow [2023-11-17 12:43:11,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 847 transitions, 17108 flow, removed 65 selfloop flow, removed 16 redundant places. [2023-11-17 12:43:11,418 INFO L231 Difference]: Finished difference. Result has 388 places, 733 transitions, 15627 flow [2023-11-17 12:43:11,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12741, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=15627, PETRI_PLACES=388, PETRI_TRANSITIONS=733} [2023-11-17 12:43:11,419 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 367 predicate places. [2023-11-17 12:43:11,419 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 733 transitions, 15627 flow [2023-11-17 12:43:11,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:43:11,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:43:11,420 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:43:11,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-17 12:43:11,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:43:11,623 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 12:43:11,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:43:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash -678206380, now seen corresponding path program 14 times [2023-11-17 12:43:11,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:43:11,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039137229] [2023-11-17 12:43:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:43:11,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:43:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:43:11,785 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 12:43:11,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:43:11,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039137229] [2023-11-17 12:43:11,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039137229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:43:11,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696328961] [2023-11-17 12:43:11,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:43:11,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:43:11,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:43:11,789 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 12:43:11,791 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 12:43:11,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:43:11,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:43:11,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-17 12:43:11,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:43:12,013 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 12:43:12,049 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 12:43:12,077 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 12:43:12,391 INFO L349 Elim1Store]: treesize reduction 38, result has 28.3 percent of original size [2023-11-17 12:43:12,391 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 200 treesize of output 185 [2023-11-17 12:43:12,506 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 12:43:12,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:43:20,202 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 12:43:20,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696328961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:43:20,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:43:20,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 7] total 23 [2023-11-17 12:43:20,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865318686] [2023-11-17 12:43:20,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:43:20,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:43:20,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:43:20,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:43:20,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:43:20,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:43:20,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 733 transitions, 15627 flow. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:43:20,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:43:20,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:43:20,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:43:31,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:43:45,993 WARN L293 SmtUtils]: Spent 9.16s on a formula simplification. DAG size of input: 179 DAG size of output: 158 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 12:44:00,392 INFO L124 PetriNetUnfolderBase]: 2259/4458 cut-off events. [2023-11-17 12:44:00,392 INFO L125 PetriNetUnfolderBase]: For 95358/95358 co-relation queries the response was YES. [2023-11-17 12:44:00,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39627 conditions, 4458 events. 2259/4458 cut-off events. For 95358/95358 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 33275 event pairs, 144 based on Foata normal form. 11/4469 useless extension candidates. Maximal degree in co-relation 39517. Up to 2224 conditions per place. [2023-11-17 12:44:00,430 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 510 selfloop transitions, 433 changer transitions 18/961 dead transitions. [2023-11-17 12:44:00,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 961 transitions, 20292 flow [2023-11-17 12:44:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-17 12:44:00,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-17 12:44:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 406 transitions. [2023-11-17 12:44:00,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40118577075098816 [2023-11-17 12:44:00,431 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 406 transitions. [2023-11-17 12:44:00,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 406 transitions. [2023-11-17 12:44:00,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:44:00,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 406 transitions. [2023-11-17 12:44:00,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 8.826086956521738) internal successors, (406), 46 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:00,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 22.0) internal successors, (1034), 47 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:00,434 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 22.0) internal successors, (1034), 47 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:00,434 INFO L175 Difference]: Start difference. First operand has 388 places, 733 transitions, 15627 flow. Second operand 46 states and 406 transitions. [2023-11-17 12:44:00,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 961 transitions, 20292 flow [2023-11-17 12:44:00,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 961 transitions, 19779 flow, removed 136 selfloop flow, removed 15 redundant places. [2023-11-17 12:44:01,010 INFO L231 Difference]: Finished difference. Result has 428 places, 827 transitions, 18621 flow [2023-11-17 12:44:01,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=15236, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=18621, PETRI_PLACES=428, PETRI_TRANSITIONS=827} [2023-11-17 12:44:01,011 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 407 predicate places. [2023-11-17 12:44:01,011 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 827 transitions, 18621 flow [2023-11-17 12:44:01,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:01,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:44:01,012 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:44:01,021 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 12:44:01,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:44:01,221 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 12:44:01,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:44:01,221 INFO L85 PathProgramCache]: Analyzing trace with hash 178542200, now seen corresponding path program 10 times [2023-11-17 12:44:01,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:44:01,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248520442] [2023-11-17 12:44:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:44:01,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:44:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:44:01,453 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 12:44:01,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:44:01,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248520442] [2023-11-17 12:44:01,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248520442] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:44:01,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916822171] [2023-11-17 12:44:01,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:44:01,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:44:01,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:44:01,455 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 12:44:01,457 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 12:44:01,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:44:01,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:44:01,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:44:01,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:44:01,693 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 12:44:01,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:44:01,802 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 12:44:01,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916822171] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:44:01,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:44:01,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:44:01,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309787825] [2023-11-17 12:44:01,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:44:01,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:44:01,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:44:01,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:44:01,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:44:01,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:44:01,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 827 transitions, 18621 flow. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:01,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:44:01,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:44:01,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:44:04,914 INFO L124 PetriNetUnfolderBase]: 2259/4443 cut-off events. [2023-11-17 12:44:04,915 INFO L125 PetriNetUnfolderBase]: For 106701/106701 co-relation queries the response was YES. [2023-11-17 12:44:04,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41573 conditions, 4443 events. 2259/4443 cut-off events. For 106701/106701 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 32986 event pairs, 345 based on Foata normal form. 28/4471 useless extension candidates. Maximal degree in co-relation 41456. Up to 1767 conditions per place. [2023-11-17 12:44:04,953 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 579 selfloop transitions, 341 changer transitions 0/920 dead transitions. [2023-11-17 12:44:04,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 920 transitions, 21140 flow [2023-11-17 12:44:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:44:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:44:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 203 transitions. [2023-11-17 12:44:04,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194214876033058 [2023-11-17 12:44:04,954 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 203 transitions. [2023-11-17 12:44:04,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 203 transitions. [2023-11-17 12:44:04,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:44:04,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 203 transitions. [2023-11-17 12:44:04,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 9.227272727272727) internal successors, (203), 22 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:04,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 22.0) internal successors, (506), 23 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:04,955 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 22.0) internal successors, (506), 23 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:04,955 INFO L175 Difference]: Start difference. First operand has 428 places, 827 transitions, 18621 flow. Second operand 22 states and 203 transitions. [2023-11-17 12:44:04,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 920 transitions, 21140 flow [2023-11-17 12:44:05,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 920 transitions, 20778 flow, removed 78 selfloop flow, removed 19 redundant places. [2023-11-17 12:44:05,590 INFO L231 Difference]: Finished difference. Result has 431 places, 834 transitions, 19114 flow [2023-11-17 12:44:05,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=18265, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=19114, PETRI_PLACES=431, PETRI_TRANSITIONS=834} [2023-11-17 12:44:05,590 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 410 predicate places. [2023-11-17 12:44:05,590 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 834 transitions, 19114 flow [2023-11-17 12:44:05,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:05,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:44:05,591 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:44:05,596 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 12:44:05,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-17 12:44:05,791 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 12:44:05,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:44:05,792 INFO L85 PathProgramCache]: Analyzing trace with hash 410786152, now seen corresponding path program 15 times [2023-11-17 12:44:05,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:44:05,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391632966] [2023-11-17 12:44:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:44:05,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:44:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:44:05,959 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 12:44:05,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:44:05,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391632966] [2023-11-17 12:44:05,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391632966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:44:05,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358342585] [2023-11-17 12:44:05,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:44:05,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:44:05,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:44:05,961 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 12:44:05,962 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 12:44:06,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:44:06,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:44:06,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 12:44:06,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:44:06,220 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 12:44:06,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:44:06,313 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 12:44:06,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358342585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:44:06,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:44:06,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:44:06,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375727181] [2023-11-17 12:44:06,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:44:06,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:44:06,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:44:06,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:44:06,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:44:06,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:44:06,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 834 transitions, 19114 flow. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:06,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:44:06,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:44:06,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:44:08,742 INFO L124 PetriNetUnfolderBase]: 2581/5129 cut-off events. [2023-11-17 12:44:08,743 INFO L125 PetriNetUnfolderBase]: For 133245/133245 co-relation queries the response was YES. [2023-11-17 12:44:08,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48398 conditions, 5129 events. 2581/5129 cut-off events. For 133245/133245 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 39265 event pairs, 295 based on Foata normal form. 8/5137 useless extension candidates. Maximal degree in co-relation 48280. Up to 1773 conditions per place. [2023-11-17 12:44:08,787 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 661 selfloop transitions, 381 changer transitions 0/1042 dead transitions. [2023-11-17 12:44:08,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 1042 transitions, 24648 flow [2023-11-17 12:44:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:44:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:44:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 232 transitions. [2023-11-17 12:44:08,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021645021645021 [2023-11-17 12:44:08,788 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 232 transitions. [2023-11-17 12:44:08,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 232 transitions. [2023-11-17 12:44:08,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:44:08,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 232 transitions. [2023-11-17 12:44:08,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 11.047619047619047) internal successors, (232), 21 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:08,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 22.0) internal successors, (484), 22 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:08,790 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 22.0) internal successors, (484), 22 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:08,790 INFO L175 Difference]: Start difference. First operand has 431 places, 834 transitions, 19114 flow. Second operand 21 states and 232 transitions. [2023-11-17 12:44:08,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 1042 transitions, 24648 flow [2023-11-17 12:44:09,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1042 transitions, 24034 flow, removed 48 selfloop flow, removed 10 redundant places. [2023-11-17 12:44:09,679 INFO L231 Difference]: Finished difference. Result has 451 places, 905 transitions, 21208 flow [2023-11-17 12:44:09,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=18566, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=21208, PETRI_PLACES=451, PETRI_TRANSITIONS=905} [2023-11-17 12:44:09,681 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 430 predicate places. [2023-11-17 12:44:09,681 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 905 transitions, 21208 flow [2023-11-17 12:44:09,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:09,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:44:09,681 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:44:09,689 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 12:44:09,887 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,SelfDestructingSolverStorable32 [2023-11-17 12:44:09,887 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 12:44:09,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:44:09,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1092094958, now seen corresponding path program 16 times [2023-11-17 12:44:09,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:44:09,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782743060] [2023-11-17 12:44:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:44:09,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:44:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:44:10,089 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 12:44:10,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:44:10,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782743060] [2023-11-17 12:44:10,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782743060] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:44:10,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406769404] [2023-11-17 12:44:10,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:44:10,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:44:10,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:44:10,093 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 12:44:10,104 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 12:44:10,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:44:10,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:44:10,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-17 12:44:10,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:44:10,347 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 12:44:10,375 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 12:44:10,405 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 12:44:10,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:44:10,483 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 12:44:10,673 INFO L349 Elim1Store]: treesize reduction 25, result has 52.8 percent of original size [2023-11-17 12:44:10,673 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 184 treesize of output 190 [2023-11-17 12:44:10,786 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 12:44:10,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:44:15,788 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 12:44:15,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406769404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:44:15,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:44:15,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 24 [2023-11-17 12:44:15,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433483612] [2023-11-17 12:44:15,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:44:15,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:44:15,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:44:15,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:44:15,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=450, Unknown=1, NotChecked=0, Total=552 [2023-11-17 12:44:15,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:44:15,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 905 transitions, 21208 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:15,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:44:15,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:44:15,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:44:22,628 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 12:44:24,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:44:33,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:44:34,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:44:40,654 WARN L539 Checker$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 12:44:45,242 INFO L124 PetriNetUnfolderBase]: 2785/5548 cut-off events. [2023-11-17 12:44:45,242 INFO L125 PetriNetUnfolderBase]: For 148917/148917 co-relation queries the response was YES. [2023-11-17 12:44:45,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53342 conditions, 5548 events. 2785/5548 cut-off events. For 148917/148917 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 43434 event pairs, 60 based on Foata normal form. 6/5554 useless extension candidates. Maximal degree in co-relation 53215. Up to 1909 conditions per place. [2023-11-17 12:44:45,305 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 413 selfloop transitions, 722 changer transitions 9/1144 dead transitions. [2023-11-17 12:44:45,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 1144 transitions, 26929 flow [2023-11-17 12:44:45,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 12:44:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 12:44:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 396 transitions. [2023-11-17 12:44:45,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2023-11-17 12:44:45,307 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 396 transitions. [2023-11-17 12:44:45,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 396 transitions. [2023-11-17 12:44:45,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:44:45,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 396 transitions. [2023-11-17 12:44:45,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 9.0) internal successors, (396), 44 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:45,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 22.0) internal successors, (990), 45 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:45,310 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 22.0) internal successors, (990), 45 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:45,310 INFO L175 Difference]: Start difference. First operand has 451 places, 905 transitions, 21208 flow. Second operand 44 states and 396 transitions. [2023-11-17 12:44:45,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 1144 transitions, 26929 flow [2023-11-17 12:44:46,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 1144 transitions, 26253 flow, removed 135 selfloop flow, removed 10 redundant places. [2023-11-17 12:44:46,328 INFO L231 Difference]: Finished difference. Result has 495 places, 1017 transitions, 25253 flow [2023-11-17 12:44:46,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=20573, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=616, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=25253, PETRI_PLACES=495, PETRI_TRANSITIONS=1017} [2023-11-17 12:44:46,329 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 474 predicate places. [2023-11-17 12:44:46,330 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 1017 transitions, 25253 flow [2023-11-17 12:44:46,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:46,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:44:46,330 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:44:46,339 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 12:44:46,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:44:46,536 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 12:44:46,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:44:46,536 INFO L85 PathProgramCache]: Analyzing trace with hash -952480004, now seen corresponding path program 17 times [2023-11-17 12:44:46,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:44:46,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14246455] [2023-11-17 12:44:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:44:46,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:44:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:44:46,678 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 12:44:46,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:44:46,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14246455] [2023-11-17 12:44:46,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14246455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:44:46,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351386664] [2023-11-17 12:44:46,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:44:46,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:44:46,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:44:46,685 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 12:44:46,687 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 12:44:46,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:44:46,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:44:46,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 12:44:46,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:44:47,270 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-17 12:44:47,271 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 73 treesize of output 40 [2023-11-17 12:44:47,315 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 12:44:47,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:44:47,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:44:47,645 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 44 treesize of output 32 [2023-11-17 12:44:47,693 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 12:44:47,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351386664] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:44:47,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:44:47,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 7] total 22 [2023-11-17 12:44:47,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781074688] [2023-11-17 12:44:47,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:44:47,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:44:47,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:44:47,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:44:47,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:44:47,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:44:47,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 1017 transitions, 25253 flow. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:47,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:44:47,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:44:47,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:44:52,472 INFO L124 PetriNetUnfolderBase]: 2851/5690 cut-off events. [2023-11-17 12:44:52,472 INFO L125 PetriNetUnfolderBase]: For 162702/162702 co-relation queries the response was YES. [2023-11-17 12:44:52,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57178 conditions, 5690 events. 2851/5690 cut-off events. For 162702/162702 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 44904 event pairs, 37 based on Foata normal form. 8/5698 useless extension candidates. Maximal degree in co-relation 57042. Up to 2263 conditions per place. [2023-11-17 12:44:52,532 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 491 selfloop transitions, 711 changer transitions 10/1212 dead transitions. [2023-11-17 12:44:52,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 1212 transitions, 30282 flow [2023-11-17 12:44:52,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-17 12:44:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-17 12:44:52,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 342 transitions. [2023-11-17 12:44:52,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36152219873150104 [2023-11-17 12:44:52,533 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 342 transitions. [2023-11-17 12:44:52,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 342 transitions. [2023-11-17 12:44:52,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:44:52,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 342 transitions. [2023-11-17 12:44:52,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 7.953488372093023) internal successors, (342), 43 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:52,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 22.0) internal successors, (968), 44 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:52,535 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 22.0) internal successors, (968), 44 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:52,535 INFO L175 Difference]: Start difference. First operand has 495 places, 1017 transitions, 25253 flow. Second operand 43 states and 342 transitions. [2023-11-17 12:44:52,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 1212 transitions, 30282 flow [2023-11-17 12:44:53,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1212 transitions, 29294 flow, removed 360 selfloop flow, removed 20 redundant places. [2023-11-17 12:44:53,819 INFO L231 Difference]: Finished difference. Result has 525 places, 1075 transitions, 27687 flow [2023-11-17 12:44:53,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=24463, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=657, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=27687, PETRI_PLACES=525, PETRI_TRANSITIONS=1075} [2023-11-17 12:44:53,820 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 504 predicate places. [2023-11-17 12:44:53,820 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 1075 transitions, 27687 flow [2023-11-17 12:44:53,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:44:53,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:44:53,820 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:44:53,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-17 12:44:54,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:44:54,021 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 12:44:54,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:44:54,021 INFO L85 PathProgramCache]: Analyzing trace with hash -190687982, now seen corresponding path program 18 times [2023-11-17 12:44:54,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:44:54,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075314623] [2023-11-17 12:44:54,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:44:54,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:44:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:44:54,157 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 12:44:54,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:44:54,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075314623] [2023-11-17 12:44:54,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075314623] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:44:54,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196344496] [2023-11-17 12:44:54,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:44:54,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:44:54,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:44:54,159 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 12:44:54,161 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 12:44:54,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:44:54,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:44:54,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:44:54,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:44:54,531 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 12:44:54,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:45:00,029 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-17 12:45:00,029 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 12:45:00,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:45:00,094 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 19 treesize of output 24 [2023-11-17 12:45:00,222 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-11-17 12:45:00,223 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 74 treesize of output 128 [2023-11-17 12:45:00,401 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-11-17 12:45:00,401 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 27 treesize of output 39 [2023-11-17 12:45:00,449 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-11-17 12:45:00,450 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 27 treesize of output 39 [2023-11-17 12:45:00,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:45:00,497 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 19 treesize of output 24 [2023-11-17 12:45:00,652 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 12:45:00,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196344496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:45:00,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:45:00,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 21 [2023-11-17 12:45:00,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021602229] [2023-11-17 12:45:00,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:45:00,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:45:00,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:45:00,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:45:00,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:45:00,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:45:00,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 1075 transitions, 27687 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:45:00,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:45:00,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:45:00,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:45:12,810 WARN L293 SmtUtils]: Spent 11.40s on a formula simplification. DAG size of input: 159 DAG size of output: 151 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 12:45:14,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:45:26,521 WARN L293 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 158 DAG size of output: 150 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 12:45:28,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:45:30,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:45:38,889 INFO L124 PetriNetUnfolderBase]: 2873/5739 cut-off events. [2023-11-17 12:45:38,889 INFO L125 PetriNetUnfolderBase]: For 180378/180378 co-relation queries the response was YES. [2023-11-17 12:45:38,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60022 conditions, 5739 events. 2873/5739 cut-off events. For 180378/180378 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 45398 event pairs, 179 based on Foata normal form. 13/5752 useless extension candidates. Maximal degree in co-relation 59880. Up to 3361 conditions per place. [2023-11-17 12:45:38,950 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 690 selfloop transitions, 490 changer transitions 16/1196 dead transitions. [2023-11-17 12:45:38,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 1196 transitions, 31287 flow [2023-11-17 12:45:38,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:45:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:45:38,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 268 transitions. [2023-11-17 12:45:38,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2023-11-17 12:45:38,952 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 268 transitions. [2023-11-17 12:45:38,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 268 transitions. [2023-11-17 12:45:38,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:45:38,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 268 transitions. [2023-11-17 12:45:38,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 8.64516129032258) internal successors, (268), 31 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:45:38,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 22.0) internal successors, (704), 32 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:45:38,953 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 22.0) internal successors, (704), 32 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:45:38,954 INFO L175 Difference]: Start difference. First operand has 525 places, 1075 transitions, 27687 flow. Second operand 31 states and 268 transitions. [2023-11-17 12:45:38,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 1196 transitions, 31287 flow [2023-11-17 12:45:40,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 1196 transitions, 29864 flow, removed 132 selfloop flow, removed 28 redundant places. [2023-11-17 12:45:40,409 INFO L231 Difference]: Finished difference. Result has 535 places, 1089 transitions, 27635 flow [2023-11-17 12:45:40,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=26276, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=27635, PETRI_PLACES=535, PETRI_TRANSITIONS=1089} [2023-11-17 12:45:40,410 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 514 predicate places. [2023-11-17 12:45:40,410 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 1089 transitions, 27635 flow [2023-11-17 12:45:40,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:45:40,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:45:40,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:45:40,415 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 12:45:40,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:45:40,611 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 12:45:40,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:45:40,611 INFO L85 PathProgramCache]: Analyzing trace with hash 707225454, now seen corresponding path program 19 times [2023-11-17 12:45:40,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:45:40,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791391945] [2023-11-17 12:45:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:45:40,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:45:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:45:40,851 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 12:45:40,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:45:40,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791391945] [2023-11-17 12:45:40,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791391945] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:45:40,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165381346] [2023-11-17 12:45:40,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:45:40,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:45:40,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:45:40,853 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 12:45:40,854 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 12:45:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:45:41,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 12:45:41,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:45:41,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:45:41,329 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 53 treesize of output 47 [2023-11-17 12:45:41,365 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 12:45:41,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:45:42,261 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:45:42,261 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 6 new quantified variables, introduced 10 case distinctions, treesize of input 235 treesize of output 299 [2023-11-17 12:45:48,771 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 12:45:48,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165381346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:45:48,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:45:48,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 21 [2023-11-17 12:45:48,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955942693] [2023-11-17 12:45:48,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:45:48,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:45:48,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:45:48,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:45:48,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:45:48,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:45:48,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 1089 transitions, 27635 flow. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:45:48,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:45:48,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:45:48,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:45:52,455 INFO L124 PetriNetUnfolderBase]: 2860/5717 cut-off events. [2023-11-17 12:45:52,456 INFO L125 PetriNetUnfolderBase]: For 170917/170917 co-relation queries the response was YES. [2023-11-17 12:45:52,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58633 conditions, 5717 events. 2860/5717 cut-off events. For 170917/170917 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 45218 event pairs, 33 based on Foata normal form. 9/5726 useless extension candidates. Maximal degree in co-relation 58491. Up to 2513 conditions per place. [2023-11-17 12:45:52,515 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 500 selfloop transitions, 676 changer transitions 11/1187 dead transitions. [2023-11-17 12:45:52,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1187 transitions, 30806 flow [2023-11-17 12:45:52,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 12:45:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 12:45:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 232 transitions. [2023-11-17 12:45:52,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2023-11-17 12:45:52,516 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 232 transitions. [2023-11-17 12:45:52,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 232 transitions. [2023-11-17 12:45:52,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:45:52,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 232 transitions. [2023-11-17 12:45:52,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 8.0) internal successors, (232), 29 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:45:52,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 22.0) internal successors, (660), 30 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:45:52,518 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 22.0) internal successors, (660), 30 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:45:52,518 INFO L175 Difference]: Start difference. First operand has 535 places, 1089 transitions, 27635 flow. Second operand 29 states and 232 transitions. [2023-11-17 12:45:52,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1187 transitions, 30806 flow [2023-11-17 12:45:53,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 1187 transitions, 30001 flow, removed 89 selfloop flow, removed 20 redundant places. [2023-11-17 12:45:54,007 INFO L231 Difference]: Finished difference. Result has 546 places, 1092 transitions, 28252 flow [2023-11-17 12:45:54,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=26768, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=671, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=28252, PETRI_PLACES=546, PETRI_TRANSITIONS=1092} [2023-11-17 12:45:54,008 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 525 predicate places. [2023-11-17 12:45:54,008 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 1092 transitions, 28252 flow [2023-11-17 12:45:54,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:45:54,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:45:54,008 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:45:54,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-17 12:45:54,214 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,SelfDestructingSolverStorable36 [2023-11-17 12:45:54,214 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 12:45:54,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:45:54,214 INFO L85 PathProgramCache]: Analyzing trace with hash -140350802, now seen corresponding path program 20 times [2023-11-17 12:45:54,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:45:54,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207444601] [2023-11-17 12:45:54,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:45:54,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:45:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:45:54,426 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 12:45:54,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:45:54,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207444601] [2023-11-17 12:45:54,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207444601] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:45:54,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844983220] [2023-11-17 12:45:54,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:45:54,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:45:54,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:45:54,429 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 12:45:54,452 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 12:45:54,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:45:54,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:45:54,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-17 12:45:54,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:45:54,729 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 12:45:54,773 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 12:45:54,808 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 12:45:55,078 INFO L349 Elim1Store]: treesize reduction 38, result has 28.3 percent of original size [2023-11-17 12:45:55,078 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 200 treesize of output 185 [2023-11-17 12:45:55,179 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 12:45:55,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:46:01,661 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 12:46:01,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844983220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:46:01,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:46:01,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 7] total 23 [2023-11-17 12:46:01,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633180354] [2023-11-17 12:46:01,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:46:01,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:46:01,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:46:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:46:01,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:46:01,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:46:01,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 1092 transitions, 28252 flow. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:46:01,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:46:01,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:46:01,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:46:12,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:46:13,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:46:31,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:46:40,690 INFO L124 PetriNetUnfolderBase]: 3000/6013 cut-off events. [2023-11-17 12:46:40,690 INFO L125 PetriNetUnfolderBase]: For 191020/191020 co-relation queries the response was YES. [2023-11-17 12:46:40,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63349 conditions, 6013 events. 3000/6013 cut-off events. For 191020/191020 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 48185 event pairs, 95 based on Foata normal form. 9/6022 useless extension candidates. Maximal degree in co-relation 63209. Up to 2545 conditions per place. [2023-11-17 12:46:40,748 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 557 selfloop transitions, 741 changer transitions 15/1313 dead transitions. [2023-11-17 12:46:40,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 1313 transitions, 34031 flow [2023-11-17 12:46:40,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-17 12:46:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-17 12:46:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 420 transitions. [2023-11-17 12:46:40,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2023-11-17 12:46:40,749 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 420 transitions. [2023-11-17 12:46:40,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 420 transitions. [2023-11-17 12:46:40,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:46:40,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 420 transitions. [2023-11-17 12:46:40,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 8.75) internal successors, (420), 48 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:46:40,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 22.0) internal successors, (1078), 49 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:46:40,751 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 22.0) internal successors, (1078), 49 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:46:40,751 INFO L175 Difference]: Start difference. First operand has 546 places, 1092 transitions, 28252 flow. Second operand 48 states and 420 transitions. [2023-11-17 12:46:40,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 1313 transitions, 34031 flow [2023-11-17 12:46:42,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 1313 transitions, 33227 flow, removed 42 selfloop flow, removed 18 redundant places. [2023-11-17 12:46:42,133 INFO L231 Difference]: Finished difference. Result has 584 places, 1179 transitions, 32215 flow [2023-11-17 12:46:42,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=27481, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=657, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=32215, PETRI_PLACES=584, PETRI_TRANSITIONS=1179} [2023-11-17 12:46:42,134 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 563 predicate places. [2023-11-17 12:46:42,134 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 1179 transitions, 32215 flow [2023-11-17 12:46:42,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:46:42,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:46:42,134 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 12:46:42,139 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 12:46:42,334 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,SelfDestructingSolverStorable37 [2023-11-17 12:46:42,334 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 12:46:42,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:46:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1864042711, now seen corresponding path program 2 times [2023-11-17 12:46:42,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:46:42,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279847414] [2023-11-17 12:46:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:46:42,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:46:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:46:42,545 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 12:46:42,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:46:42,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279847414] [2023-11-17 12:46:42,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279847414] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:46:42,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261321511] [2023-11-17 12:46:42,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:46:42,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:46:42,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:46:42,553 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 12:46:42,557 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 12:46:42,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:46:42,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:46:42,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:46:42,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:46:42,875 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 12:46:42,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:46:43,025 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 12:46:43,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261321511] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:46:43,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:46:43,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-17 12:46:43,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421535648] [2023-11-17 12:46:43,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:46:43,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:46:43,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:46:43,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:46:43,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:46:43,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:46:43,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 1179 transitions, 32215 flow. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:46:43,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:46:43,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:46:43,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:46:48,031 INFO L124 PetriNetUnfolderBase]: 3085/6184 cut-off events. [2023-11-17 12:46:48,032 INFO L125 PetriNetUnfolderBase]: For 220220/220220 co-relation queries the response was YES. [2023-11-17 12:46:48,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68185 conditions, 6184 events. 3085/6184 cut-off events. For 220220/220220 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 49908 event pairs, 521 based on Foata normal form. 44/6228 useless extension candidates. Maximal degree in co-relation 68035. Up to 2189 conditions per place. [2023-11-17 12:46:48,095 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 857 selfloop transitions, 505 changer transitions 0/1362 dead transitions. [2023-11-17 12:46:48,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 1362 transitions, 37419 flow [2023-11-17 12:46:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:46:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:46:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 332 transitions. [2023-11-17 12:46:48,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43116883116883115 [2023-11-17 12:46:48,096 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 332 transitions. [2023-11-17 12:46:48,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 332 transitions. [2023-11-17 12:46:48,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:46:48,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 332 transitions. [2023-11-17 12:46:48,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 9.485714285714286) internal successors, (332), 35 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:46:48,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 22.0) internal successors, (792), 36 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:46:48,098 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 22.0) internal successors, (792), 36 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:46:48,098 INFO L175 Difference]: Start difference. First operand has 584 places, 1179 transitions, 32215 flow. Second operand 35 states and 332 transitions. [2023-11-17 12:46:48,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 1362 transitions, 37419 flow [2023-11-17 12:46:49,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 1362 transitions, 36997 flow, removed 173 selfloop flow, removed 15 redundant places. [2023-11-17 12:46:49,922 INFO L231 Difference]: Finished difference. Result has 609 places, 1218 transitions, 34369 flow [2023-11-17 12:46:49,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=31777, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=464, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=34369, PETRI_PLACES=609, PETRI_TRANSITIONS=1218} [2023-11-17 12:46:49,923 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 588 predicate places. [2023-11-17 12:46:49,923 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 1218 transitions, 34369 flow [2023-11-17 12:46:49,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:46:49,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:46:49,923 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:46:49,933 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 12:46:50,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 12:46:50,130 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 12:46:50,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:46:50,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1437367, now seen corresponding path program 21 times [2023-11-17 12:46:50,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:46:50,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002670310] [2023-11-17 12:46:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:46:50,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:46:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:46:51,746 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 12:46:51,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:46:51,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002670310] [2023-11-17 12:46:51,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002670310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:46:51,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719250668] [2023-11-17 12:46:51,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:46:51,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:46:51,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:46:51,747 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 12:46:51,753 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 12:46:52,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:46:52,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:46:52,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-17 12:46:52,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:46:52,050 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 12:46:52,083 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 12:46:52,120 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 12:46:52,156 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 12:46:52,530 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-17 12:46:52,530 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 79 treesize of output 40 [2023-11-17 12:46:52,598 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 12:46:52,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:46:57,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:46:57,340 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 648 treesize of output 313 [2023-11-17 12:46:57,561 INFO L349 Elim1Store]: treesize reduction 5, result has 96.7 percent of original size [2023-11-17 12:46:57,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 870 treesize of output 905 [2023-11-17 12:46:57,892 INFO L349 Elim1Store]: treesize reduction 8, result has 94.8 percent of original size [2023-11-17 12:46:57,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 726 treesize of output 686 [2023-11-17 12:46:58,159 INFO L349 Elim1Store]: treesize reduction 8, result has 94.8 percent of original size [2023-11-17 12:46:58,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 305 treesize of output 373 [2023-11-17 12:47:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:47:07,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719250668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:47:07,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:47:07,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 32 [2023-11-17 12:47:07,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460380752] [2023-11-17 12:47:07,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:47:07,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 12:47:07,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:47:07,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 12:47:07,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=924, Unknown=5, NotChecked=0, Total=1122 [2023-11-17 12:47:07,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:47:07,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 1218 transitions, 34369 flow. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:47:07,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:47:07,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:47:07,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:47:11,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:47:22,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:47:25,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:47:28,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:47:29,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:47:32,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:47:38,129 INFO L124 PetriNetUnfolderBase]: 4756/9170 cut-off events. [2023-11-17 12:47:38,129 INFO L125 PetriNetUnfolderBase]: For 364735/364735 co-relation queries the response was YES. [2023-11-17 12:47:38,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105325 conditions, 9170 events. 4756/9170 cut-off events. For 364735/364735 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 76201 event pairs, 159 based on Foata normal form. 8/9178 useless extension candidates. Maximal degree in co-relation 105168. Up to 3069 conditions per place. [2023-11-17 12:47:38,326 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 464 selfloop transitions, 1529 changer transitions 19/2012 dead transitions. [2023-11-17 12:47:38,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 2012 transitions, 57501 flow [2023-11-17 12:47:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-17 12:47:38,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-11-17 12:47:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 519 transitions. [2023-11-17 12:47:38,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067398119122257 [2023-11-17 12:47:38,328 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 519 transitions. [2023-11-17 12:47:38,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 519 transitions. [2023-11-17 12:47:38,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:47:38,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 519 transitions. [2023-11-17 12:47:38,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 8.948275862068966) internal successors, (519), 58 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:47:38,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 22.0) internal successors, (1298), 59 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:47:38,330 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 22.0) internal successors, (1298), 59 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:47:38,330 INFO L175 Difference]: Start difference. First operand has 609 places, 1218 transitions, 34369 flow. Second operand 58 states and 519 transitions. [2023-11-17 12:47:38,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 2012 transitions, 57501 flow [2023-11-17 12:47:41,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 2012 transitions, 56635 flow, removed 201 selfloop flow, removed 19 redundant places. [2023-11-17 12:47:41,790 INFO L231 Difference]: Finished difference. Result has 671 places, 1806 transitions, 56064 flow [2023-11-17 12:47:41,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=33721, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=967, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=56064, PETRI_PLACES=671, PETRI_TRANSITIONS=1806} [2023-11-17 12:47:41,792 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 650 predicate places. [2023-11-17 12:47:41,792 INFO L495 AbstractCegarLoop]: Abstraction has has 671 places, 1806 transitions, 56064 flow [2023-11-17 12:47:41,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:47:41,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:47:41,792 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 12:47:41,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-17 12:47:41,998 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,SelfDestructingSolverStorable39 [2023-11-17 12:47:41,998 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 12:47:41,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:47:41,998 INFO L85 PathProgramCache]: Analyzing trace with hash -976609879, now seen corresponding path program 3 times [2023-11-17 12:47:41,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:47:41,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946223863] [2023-11-17 12:47:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:47:41,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:47:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:47:42,177 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 12:47:42,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:47:42,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946223863] [2023-11-17 12:47:42,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946223863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:47:42,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704981206] [2023-11-17 12:47:42,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:47:42,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:47:42,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:47:42,181 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 12:47:42,189 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 12:47:42,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:47:42,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:47:42,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-17 12:47:42,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:47:42,624 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 12:47:42,669 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 8 treesize of output 1 [2023-11-17 12:47:42,706 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 12:47:43,162 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 12:47:43,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:47:57,208 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 12:47:57,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704981206] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:47:57,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:47:57,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 26 [2023-11-17 12:47:57,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138280986] [2023-11-17 12:47:57,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:47:57,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:47:57,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:47:57,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:47:57,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:47:57,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-17 12:47:57,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 671 places, 1806 transitions, 56064 flow. Second operand has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:47:57,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:47:57,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-17 12:47:57,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:48:17,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 12:48:25,870 WARN L293 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 241 DAG size of output: 193 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 12:49:05,100 WARN L293 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 232 DAG size of output: 225 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-11-17 12:49:12,386 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:49:12,386 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 12:49:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-17 12:49:12,429 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 12:49:12,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-17 12:49:12,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:49:12,629 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (26states, 3/22 universal loopers) in iteration 41,while PetriNetUnfolder was constructing finite prefix that currently has 93037 conditions, 7312 events (4043/7311 cut-off events. For 336401/336401 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 59891 event pairs, 270 based on Foata normal form. 8/7728 useless extension candidates. Maximal degree in co-relation 92859. Up to 3407 conditions per place.). [2023-11-17 12:49:12,631 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 12:49:12,632 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 12:49:12,632 INFO L445 BasicCegarLoop]: Path program histogram: [21, 10, 6, 3, 1] [2023-11-17 12:49:12,634 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:49:12,634 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:49:12,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:49:12 BasicIcfg [2023-11-17 12:49:12,636 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:49:12,636 INFO L158 Benchmark]: Toolchain (without parser) took 530428.65ms. Allocated memory was 267.4MB in the beginning and 1.5GB in the end (delta: 1.2GB). Free memory was 217.1MB in the beginning and 268.2MB in the end (delta: -51.1MB). Peak memory consumption was 1.3GB. Max. memory is 8.0GB. [2023-11-17 12:49:12,637 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 191.9MB. Free memory was 137.6MB in the beginning and 137.5MB in the end (delta: 89.6kB). There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:49:12,637 INFO L158 Benchmark]: CACSL2BoogieTranslator took 301.38ms. Allocated memory is still 267.4MB. Free memory was 216.5MB in the beginning and 204.5MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 12:49:12,637 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.65ms. Allocated memory is still 267.4MB. Free memory was 204.5MB in the beginning and 202.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:49:12,637 INFO L158 Benchmark]: Boogie Preprocessor took 27.27ms. Allocated memory is still 267.4MB. Free memory was 202.4MB in the beginning and 200.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:49:12,637 INFO L158 Benchmark]: RCFGBuilder took 804.30ms. Allocated memory is still 267.4MB. Free memory was 200.8MB in the beginning and 136.3MB in the end (delta: 64.5MB). Peak memory consumption was 64.0MB. Max. memory is 8.0GB. [2023-11-17 12:49:12,637 INFO L158 Benchmark]: TraceAbstraction took 529246.58ms. Allocated memory was 267.4MB in the beginning and 1.5GB in the end (delta: 1.2GB). Free memory was 135.8MB in the beginning and 268.2MB in the end (delta: -132.4MB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2023-11-17 12:49:12,638 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 191.9MB. Free memory was 137.6MB in the beginning and 137.5MB in the end (delta: 89.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 301.38ms. Allocated memory is still 267.4MB. Free memory was 216.5MB in the beginning and 204.5MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 42.65ms. Allocated memory is still 267.4MB. Free memory was 204.5MB in the beginning and 202.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.27ms. Allocated memory is still 267.4MB. Free memory was 202.4MB in the beginning and 200.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 804.30ms. Allocated memory is still 267.4MB. Free memory was 200.8MB in the beginning and 136.3MB in the end (delta: 64.5MB). Peak memory consumption was 64.0MB. Max. memory is 8.0GB. * TraceAbstraction took 529246.58ms. Allocated memory was 267.4MB in the beginning and 1.5GB in the end (delta: 1.2GB). Free memory was 135.8MB in the beginning and 268.2MB in the end (delta: -132.4MB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 22 PlacesBefore, 21 PlacesAfterwards, 18 TransitionsBefore, 17 TransitionsAfterwards, 54 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 54 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 52, independent: 50, independent conditional: 0, independent unconditional: 50, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 25, independent: 24, independent conditional: 0, independent unconditional: 24, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 25, independent: 24, independent conditional: 0, independent unconditional: 24, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 5, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 52, independent: 26, independent conditional: 0, independent unconditional: 26, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 25, unknown conditional: 0, unknown unconditional: 25] , Statistics on independence cache: Total cache size (in pairs): 25, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, 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: 107]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (26states, 3/22 universal loopers) in iteration 41,while PetriNetUnfolder was constructing finite prefix that currently has 93037 conditions, 7312 events (4043/7311 cut-off events. For 336401/336401 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 59891 event pairs, 270 based on Foata normal form. 8/7728 useless extension candidates. Maximal degree in co-relation 92859. Up to 3407 conditions per place.). - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (26states, 3/22 universal loopers) in iteration 41,while PetriNetUnfolder was constructing finite prefix that currently has 93037 conditions, 7312 events (4043/7311 cut-off events. For 336401/336401 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 59891 event pairs, 270 based on Foata normal form. 8/7728 useless extension candidates. Maximal degree in co-relation 92859. Up to 3407 conditions per place.). - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (26states, 3/22 universal loopers) in iteration 41,while PetriNetUnfolder was constructing finite prefix that currently has 93037 conditions, 7312 events (4043/7311 cut-off events. For 336401/336401 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 59891 event pairs, 270 based on Foata normal form. 8/7728 useless extension candidates. Maximal degree in co-relation 92859. Up to 3407 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 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: 529.1s, OverallIterations: 41, TraceHistogramMax: 3, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 378.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 59 mSolverCounterUnknown, 4778 SdHoareTripleChecker+Valid, 132.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4778 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 128.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1063 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 22673 IncrementalHoareTripleChecker+Invalid, 23795 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1063 mSolverCounterUnsat, 0 mSDtfsCounter, 22673 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2392 GetRequests, 1150 SyntacticMatches, 3 SemanticMatches, 1239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12947 ImplicationChecksByTransitivity, 220.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56064occurred in iteration=40, InterpolantAutomatonStates: 963, 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: 0.5s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 135.2s InterpolantComputationTime, 1284 NumberOfCodeBlocks, 1284 NumberOfCodeBlocksAsserted, 103 NumberOfCheckSat, 1765 ConstructedInterpolants, 20 QuantifiedInterpolants, 50177 SizeOfPredicates, 699 NumberOfNonLiveVariables, 6043 ConjunctsInSsa, 948 ConjunctsInUnsatCore, 109 InterpolantComputations, 7 PerfectInterpolantSequences, 213/480 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