/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/popl20-more-sum-array-hom.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:26:28,587 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:26:28,642 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 12:26:28,672 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:26:28,673 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:26:28,673 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:26:28,674 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:26:28,674 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:26:28,674 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:26:28,677 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:26:28,678 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:26:28,678 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:26:28,678 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:26:28,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:26:28,679 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:26:28,679 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:26:28,680 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:26:28,680 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:26:28,680 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:26:28,680 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:26:28,680 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:26:28,681 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:26:28,681 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:26:28,681 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:26:28,681 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:26:28,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:26:28,682 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:26:28,682 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:26:28,683 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:26:28,683 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:26:28,684 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:26:28,684 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:26:28,684 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:26:28,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:26:28,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:26:28,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:26:28,865 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:26:28,865 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:26:28,866 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2023-11-17 12:26:29,847 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:26:29,992 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:26:29,993 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2023-11-17 12:26:30,000 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef5801b42/6eb32d5165d640afb4d67b6c1b68b9e5/FLAG782b05c64 [2023-11-17 12:26:30,017 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef5801b42/6eb32d5165d640afb4d67b6c1b68b9e5 [2023-11-17 12:26:30,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:26:30,020 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:26:30,022 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:26:30,023 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:26:30,026 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:26:30,026 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:26:30" (1/1) ... [2023-11-17 12:26:30,027 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b87af12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:26:30, skipping insertion in model container [2023-11-17 12:26:30,027 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:26:30" (1/1) ... [2023-11-17 12:26:30,046 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:26:30,149 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2023-11-17 12:26:30,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:26:30,160 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:26:30,174 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2023-11-17 12:26:30,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:26:30,186 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:26:30,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:26:30 WrapperNode [2023-11-17 12:26:30,186 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:26:30,187 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:26:30,187 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:26:30,187 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:26:30,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:26:30" (1/1) ... [2023-11-17 12:26:30,196 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:26:30" (1/1) ... [2023-11-17 12:26:30,209 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-11-17 12:26:30,209 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:26:30,210 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:26:30,210 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:26:30,210 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:26:30,216 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:26:30" (1/1) ... [2023-11-17 12:26:30,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:26:30" (1/1) ... [2023-11-17 12:26:30,218 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:26:30" (1/1) ... [2023-11-17 12:26:30,219 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:26:30" (1/1) ... [2023-11-17 12:26:30,224 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:26:30" (1/1) ... [2023-11-17 12:26:30,226 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:26:30" (1/1) ... [2023-11-17 12:26:30,227 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:26:30" (1/1) ... [2023-11-17 12:26:30,227 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:26:30" (1/1) ... [2023-11-17 12:26:30,229 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:26:30,230 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:26:30,230 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:26:30,230 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:26:30,230 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:26:30" (1/1) ... [2023-11-17 12:26:30,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:26:30,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:30,250 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 12:26:30,271 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 12:26:30,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:26:30,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:26:30,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:26:30,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:26:30,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:26:30,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:26:30,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:26:30,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:26:30,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 12:26:30,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 12:26:30,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:26:30,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:26:30,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:26:30,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:26:30,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:26:30,278 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 12:26:30,353 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:26:30,355 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:26:30,564 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:26:30,726 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:26:30,726 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 12:26:30,727 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:26:30 BoogieIcfgContainer [2023-11-17 12:26:30,727 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:26:30,729 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:26:30,729 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:26:30,731 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:26:30,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:26:30" (1/3) ... [2023-11-17 12:26:30,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c39bad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:26:30, skipping insertion in model container [2023-11-17 12:26:30,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:26:30" (2/3) ... [2023-11-17 12:26:30,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c39bad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:26:30, skipping insertion in model container [2023-11-17 12:26:30,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:26:30" (3/3) ... [2023-11-17 12:26:30,733 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2023-11-17 12:26:30,746 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:26:30,747 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:26:30,747 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:26:30,788 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 12:26:30,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 29 transitions, 79 flow [2023-11-17 12:26:30,833 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2023-11-17 12:26:30,833 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:26:30,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 26 events. 4/26 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2023-11-17 12:26:30,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 29 transitions, 79 flow [2023-11-17 12:26:30,837 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 25 transitions, 68 flow [2023-11-17 12:26:30,839 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:26:30,847 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 31 places, 25 transitions, 68 flow [2023-11-17 12:26:30,849 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 31 places, 25 transitions, 68 flow [2023-11-17 12:26:30,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 25 transitions, 68 flow [2023-11-17 12:26:30,856 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-11-17 12:26:30,856 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:26:30,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 25 events. 4/25 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 17 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2023-11-17 12:26:30,861 INFO L119 LiptonReduction]: Number of co-enabled transitions 144 [2023-11-17 12:26:30,906 INFO L134 LiptonReduction]: Checked pairs total: 138 [2023-11-17 12:26:30,906 INFO L136 LiptonReduction]: Total number of compositions: 1 [2023-11-17 12:26:30,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:26:30,927 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;@7451f56d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:26:30,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 12:26:30,938 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:26:30,938 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-17 12:26:30,938 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:26:30,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:30,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:30,939 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:30,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:30,942 INFO L85 PathProgramCache]: Analyzing trace with hash -5225850, now seen corresponding path program 1 times [2023-11-17 12:26:30,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:30,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733347708] [2023-11-17 12:26:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:30,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:31,437 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 12:26:31,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:31,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733347708] [2023-11-17 12:26:31,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733347708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:26:31,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:26:31,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 12:26:31,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250007951] [2023-11-17 12:26:31,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:26:31,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:26:31,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:31,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:26:31,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:26:31,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:31,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:31,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:31,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:31,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:31,610 INFO L124 PetriNetUnfolderBase]: 429/632 cut-off events. [2023-11-17 12:26:31,610 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-17 12:26:31,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1341 conditions, 632 events. 429/632 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1994 event pairs, 138 based on Foata normal form. 1/468 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2023-11-17 12:26:31,618 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 38 selfloop transitions, 4 changer transitions 1/43 dead transitions. [2023-11-17 12:26:31,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 205 flow [2023-11-17 12:26:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:26:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:26:31,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2023-11-17 12:26:31,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2023-11-17 12:26:31,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 56 transitions. [2023-11-17 12:26:31,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 56 transitions. [2023-11-17 12:26:31,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:31,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 56 transitions. [2023-11-17 12:26:31,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 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 12:26:31,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:31,637 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:31,638 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 56 transitions. [2023-11-17 12:26:31,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 205 flow [2023-11-17 12:26:31,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 43 transitions, 183 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 12:26:31,646 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-11-17 12:26:31,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-17 12:26:31,649 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-17 12:26:31,649 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-11-17 12:26:31,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:31,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:31,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:31,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:26:31,650 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:31,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:31,650 INFO L85 PathProgramCache]: Analyzing trace with hash -294744292, now seen corresponding path program 1 times [2023-11-17 12:26:31,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:31,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827809863] [2023-11-17 12:26:31,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:31,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:31,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:31,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827809863] [2023-11-17 12:26:31,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827809863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:26:31,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:26:31,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:26:31,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986252044] [2023-11-17 12:26:31,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:26:31,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:26:31,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:31,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:26:31,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:26:31,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:31,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:31,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:31,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:31,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:31,943 INFO L124 PetriNetUnfolderBase]: 785/1177 cut-off events. [2023-11-17 12:26:31,943 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2023-11-17 12:26:31,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2817 conditions, 1177 events. 785/1177 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4363 event pairs, 457 based on Foata normal form. 46/1221 useless extension candidates. Maximal degree in co-relation 998. Up to 633 conditions per place. [2023-11-17 12:26:31,949 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 59 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2023-11-17 12:26:31,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 64 transitions, 312 flow [2023-11-17 12:26:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:26:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:26:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2023-11-17 12:26:31,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2023-11-17 12:26:31,952 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 78 transitions. [2023-11-17 12:26:31,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 78 transitions. [2023-11-17 12:26:31,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:31,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 78 transitions. [2023-11-17 12:26:31,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 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 12:26:31,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:31,955 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:31,955 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 5 states and 78 transitions. [2023-11-17 12:26:31,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 64 transitions, 312 flow [2023-11-17 12:26:31,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 64 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:26:31,957 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 114 flow [2023-11-17 12:26:31,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-17 12:26:31,958 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-11-17 12:26:31,958 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 114 flow [2023-11-17 12:26:31,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:31,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:31,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:31,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:26:31,960 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:31,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:31,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1101362181, now seen corresponding path program 1 times [2023-11-17 12:26:31,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:31,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550589214] [2023-11-17 12:26:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:31,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:32,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:32,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550589214] [2023-11-17 12:26:32,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550589214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:26:32,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:26:32,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:26:32,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099511165] [2023-11-17 12:26:32,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:26:32,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:26:32,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:32,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:26:32,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:26:32,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:32,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:32,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:32,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:32,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:32,206 INFO L124 PetriNetUnfolderBase]: 683/1045 cut-off events. [2023-11-17 12:26:32,207 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-11-17 12:26:32,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2661 conditions, 1045 events. 683/1045 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3894 event pairs, 417 based on Foata normal form. 46/1090 useless extension candidates. Maximal degree in co-relation 1602. Up to 633 conditions per place. [2023-11-17 12:26:32,211 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 55 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-11-17 12:26:32,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 318 flow [2023-11-17 12:26:32,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:26:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:26:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2023-11-17 12:26:32,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2023-11-17 12:26:32,213 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 76 transitions. [2023-11-17 12:26:32,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 76 transitions. [2023-11-17 12:26:32,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:32,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 76 transitions. [2023-11-17 12:26:32,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.2) internal successors, (76), 5 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 12:26:32,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:32,215 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:32,215 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 114 flow. Second operand 5 states and 76 transitions. [2023-11-17 12:26:32,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 318 flow [2023-11-17 12:26:32,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 60 transitions, 314 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 12:26:32,217 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 137 flow [2023-11-17 12:26:32,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-17 12:26:32,219 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-11-17 12:26:32,219 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 137 flow [2023-11-17 12:26:32,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:32,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:32,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:32,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:26:32,220 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:32,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:32,221 INFO L85 PathProgramCache]: Analyzing trace with hash -50437534, now seen corresponding path program 1 times [2023-11-17 12:26:32,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:32,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473333898] [2023-11-17 12:26:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:32,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:32,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:32,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473333898] [2023-11-17 12:26:32,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473333898] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:26:32,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:26:32,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:26:32,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849064651] [2023-11-17 12:26:32,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:26:32,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:26:32,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:32,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:26:32,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:26:32,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:32,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:32,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:32,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:32,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:32,443 INFO L124 PetriNetUnfolderBase]: 567/875 cut-off events. [2023-11-17 12:26:32,444 INFO L125 PetriNetUnfolderBase]: For 842/842 co-relation queries the response was YES. [2023-11-17 12:26:32,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2519 conditions, 875 events. 567/875 cut-off events. For 842/842 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3128 event pairs, 369 based on Foata normal form. 26/900 useless extension candidates. Maximal degree in co-relation 1778. Up to 633 conditions per place. [2023-11-17 12:26:32,447 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 26 selfloop transitions, 2 changer transitions 27/55 dead transitions. [2023-11-17 12:26:32,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 315 flow [2023-11-17 12:26:32,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:26:32,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:26:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2023-11-17 12:26:32,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2023-11-17 12:26:32,451 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 73 transitions. [2023-11-17 12:26:32,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 73 transitions. [2023-11-17 12:26:32,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:32,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 73 transitions. [2023-11-17 12:26:32,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:32,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:32,457 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:32,457 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 137 flow. Second operand 5 states and 73 transitions. [2023-11-17 12:26:32,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 315 flow [2023-11-17 12:26:32,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 55 transitions, 310 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 12:26:32,461 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 110 flow [2023-11-17 12:26:32,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-11-17 12:26:32,463 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2023-11-17 12:26:32,463 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 110 flow [2023-11-17 12:26:32,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:32,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:32,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:32,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 12:26:32,463 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:32,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:32,463 INFO L85 PathProgramCache]: Analyzing trace with hash -742424839, now seen corresponding path program 1 times [2023-11-17 12:26:32,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:32,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668254958] [2023-11-17 12:26:32,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:32,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:32,560 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 12:26:32,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:32,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668254958] [2023-11-17 12:26:32,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668254958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:32,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090722935] [2023-11-17 12:26:32,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:32,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:32,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:32,563 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 12:26:32,568 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 12:26:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:32,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:26:32,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:32,769 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 12:26:32,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:32,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090722935] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:32,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:26:32,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-11-17 12:26:32,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587380397] [2023-11-17 12:26:32,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:26:32,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:26:32,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:32,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:26:32,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:26:32,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:32,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 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 12:26:32,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:32,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:32,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:33,018 INFO L124 PetriNetUnfolderBase]: 578/860 cut-off events. [2023-11-17 12:26:33,018 INFO L125 PetriNetUnfolderBase]: For 788/788 co-relation queries the response was YES. [2023-11-17 12:26:33,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2610 conditions, 860 events. 578/860 cut-off events. For 788/788 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3012 event pairs, 166 based on Foata normal form. 18/877 useless extension candidates. Maximal degree in co-relation 2591. Up to 421 conditions per place. [2023-11-17 12:26:33,023 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 62 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2023-11-17 12:26:33,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 71 transitions, 416 flow [2023-11-17 12:26:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:26:33,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:26:33,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2023-11-17 12:26:33,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-17 12:26:33,024 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 91 transitions. [2023-11-17 12:26:33,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 91 transitions. [2023-11-17 12:26:33,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:33,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 91 transitions. [2023-11-17 12:26:33,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 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 12:26:33,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:33,025 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:33,025 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 110 flow. Second operand 7 states and 91 transitions. [2023-11-17 12:26:33,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 71 transitions, 416 flow [2023-11-17 12:26:33,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 71 transitions, 348 flow, removed 32 selfloop flow, removed 8 redundant places. [2023-11-17 12:26:33,029 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 141 flow [2023-11-17 12:26:33,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=141, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2023-11-17 12:26:33,030 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-11-17 12:26:33,030 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 141 flow [2023-11-17 12:26:33,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 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 12:26:33,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:33,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:33,038 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 12:26:33,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:33,244 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:33,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1945672591, now seen corresponding path program 2 times [2023-11-17 12:26:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:33,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388259385] [2023-11-17 12:26:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:33,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:33,350 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 12:26:33,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:33,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388259385] [2023-11-17 12:26:33,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388259385] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:33,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718584546] [2023-11-17 12:26:33,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:26:33,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:33,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:33,352 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 12:26:33,355 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 12:26:33,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:26:33,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:33,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:26:33,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:33,487 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 12:26:33,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:33,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718584546] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:33,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:26:33,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-11-17 12:26:33,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983602597] [2023-11-17 12:26:33,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:26:33,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:26:33,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:33,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:26:33,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:26:33,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:33,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 141 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 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 12:26:33,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:33,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:33,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:33,732 INFO L124 PetriNetUnfolderBase]: 765/1141 cut-off events. [2023-11-17 12:26:33,732 INFO L125 PetriNetUnfolderBase]: For 1133/1133 co-relation queries the response was YES. [2023-11-17 12:26:33,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3471 conditions, 1141 events. 765/1141 cut-off events. For 1133/1133 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4260 event pairs, 264 based on Foata normal form. 14/1154 useless extension candidates. Maximal degree in co-relation 3449. Up to 665 conditions per place. [2023-11-17 12:26:33,737 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 64 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2023-11-17 12:26:33,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 76 transitions, 461 flow [2023-11-17 12:26:33,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:26:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:26:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2023-11-17 12:26:33,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2023-11-17 12:26:33,738 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 87 transitions. [2023-11-17 12:26:33,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 87 transitions. [2023-11-17 12:26:33,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:33,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 87 transitions. [2023-11-17 12:26:33,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:33,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:33,740 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:33,740 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 141 flow. Second operand 7 states and 87 transitions. [2023-11-17 12:26:33,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 76 transitions, 461 flow [2023-11-17 12:26:33,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 76 transitions, 426 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-11-17 12:26:33,743 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 198 flow [2023-11-17 12:26:33,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-17 12:26:33,743 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2023-11-17 12:26:33,744 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 198 flow [2023-11-17 12:26:33,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 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 12:26:33,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:33,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:33,751 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 12:26:33,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 12:26:33,949 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:33,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:33,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1381307637, now seen corresponding path program 3 times [2023-11-17 12:26:33,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:33,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336200244] [2023-11-17 12:26:33,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:33,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:34,073 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 12:26:34,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:34,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336200244] [2023-11-17 12:26:34,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336200244] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:34,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480450830] [2023-11-17 12:26:34,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:26:34,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:34,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:34,075 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 12:26:34,102 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 12:26:34,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:26:34,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:34,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:26:34,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:34,231 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 12:26:34,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:34,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480450830] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:34,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:26:34,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-11-17 12:26:34,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318569918] [2023-11-17 12:26:34,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:26:34,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:26:34,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:34,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:26:34,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:26:34,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:34,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 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 12:26:34,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:34,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:34,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:34,469 INFO L124 PetriNetUnfolderBase]: 887/1330 cut-off events. [2023-11-17 12:26:34,470 INFO L125 PetriNetUnfolderBase]: For 2443/2443 co-relation queries the response was YES. [2023-11-17 12:26:34,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4687 conditions, 1330 events. 887/1330 cut-off events. For 2443/2443 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5170 event pairs, 362 based on Foata normal form. 18/1347 useless extension candidates. Maximal degree in co-relation 4662. Up to 942 conditions per place. [2023-11-17 12:26:34,476 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 62 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2023-11-17 12:26:34,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 79 transitions, 541 flow [2023-11-17 12:26:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:26:34,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:26:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2023-11-17 12:26:34,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2023-11-17 12:26:34,478 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 88 transitions. [2023-11-17 12:26:34,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 88 transitions. [2023-11-17 12:26:34,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:34,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 88 transitions. [2023-11-17 12:26:34,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 12:26:34,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:34,479 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:34,479 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 198 flow. Second operand 7 states and 88 transitions. [2023-11-17 12:26:34,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 79 transitions, 541 flow [2023-11-17 12:26:34,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 79 transitions, 500 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-11-17 12:26:34,485 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 295 flow [2023-11-17 12:26:34,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=295, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-11-17 12:26:34,488 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2023-11-17 12:26:34,488 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 295 flow [2023-11-17 12:26:34,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 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 12:26:34,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:34,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:34,495 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 12:26:34,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:34,693 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:34,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:34,694 INFO L85 PathProgramCache]: Analyzing trace with hash 959506511, now seen corresponding path program 4 times [2023-11-17 12:26:34,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:34,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544913378] [2023-11-17 12:26:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:34,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:34,824 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 12:26:34,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:34,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544913378] [2023-11-17 12:26:34,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544913378] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:34,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034921454] [2023-11-17 12:26:34,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:26:34,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:34,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:34,828 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 12:26:34,844 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 12:26:34,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:26:34,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:34,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:26:34,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:34,959 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 12:26:34,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:35,006 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 12:26:35,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034921454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:35,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:35,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-17 12:26:35,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905868923] [2023-11-17 12:26:35,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:35,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:26:35,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:35,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:26:35,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:26:35,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:35,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 295 flow. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:35,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:35,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:35,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:35,445 INFO L124 PetriNetUnfolderBase]: 869/1312 cut-off events. [2023-11-17 12:26:35,445 INFO L125 PetriNetUnfolderBase]: For 3579/3579 co-relation queries the response was YES. [2023-11-17 12:26:35,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5094 conditions, 1312 events. 869/1312 cut-off events. For 3579/3579 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5289 event pairs, 166 based on Foata normal form. 18/1329 useless extension candidates. Maximal degree in co-relation 5066. Up to 459 conditions per place. [2023-11-17 12:26:35,453 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 104 selfloop transitions, 71 changer transitions 0/175 dead transitions. [2023-11-17 12:26:35,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 175 transitions, 1382 flow [2023-11-17 12:26:35,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:26:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:26:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 194 transitions. [2023-11-17 12:26:35,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3592592592592593 [2023-11-17 12:26:35,454 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 194 transitions. [2023-11-17 12:26:35,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 194 transitions. [2023-11-17 12:26:35,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:35,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 194 transitions. [2023-11-17 12:26:35,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 10.777777777777779) internal successors, (194), 18 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 12:26:35,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 30.0) internal successors, (570), 19 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:35,457 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 30.0) internal successors, (570), 19 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:35,457 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 295 flow. Second operand 18 states and 194 transitions. [2023-11-17 12:26:35,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 175 transitions, 1382 flow [2023-11-17 12:26:35,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 175 transitions, 1262 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-17 12:26:35,464 INFO L231 Difference]: Finished difference. Result has 64 places, 100 transitions, 832 flow [2023-11-17 12:26:35,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=832, PETRI_PLACES=64, PETRI_TRANSITIONS=100} [2023-11-17 12:26:35,466 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2023-11-17 12:26:35,466 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 100 transitions, 832 flow [2023-11-17 12:26:35,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:35,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:35,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:35,474 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 12:26:35,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:35,672 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:35,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:35,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1948730837, now seen corresponding path program 5 times [2023-11-17 12:26:35,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:35,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864855558] [2023-11-17 12:26:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:35,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:35,756 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 12:26:35,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:35,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864855558] [2023-11-17 12:26:35,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864855558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:35,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770266323] [2023-11-17 12:26:35,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:26:35,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:35,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:35,758 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 12:26:35,765 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 12:26:35,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:26:35,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:35,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:26:35,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:35,883 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 12:26:35,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:35,931 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 12:26:35,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770266323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:35,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:35,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:26:35,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311386233] [2023-11-17 12:26:35,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:35,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:26:35,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:35,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:26:35,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:26:35,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:35,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 100 transitions, 832 flow. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 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 12:26:35,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:35,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:35,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:36,323 INFO L124 PetriNetUnfolderBase]: 850/1272 cut-off events. [2023-11-17 12:26:36,323 INFO L125 PetriNetUnfolderBase]: For 3790/3790 co-relation queries the response was YES. [2023-11-17 12:26:36,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5454 conditions, 1272 events. 850/1272 cut-off events. For 3790/3790 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4983 event pairs, 208 based on Foata normal form. 14/1286 useless extension candidates. Maximal degree in co-relation 5423. Up to 622 conditions per place. [2023-11-17 12:26:36,330 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 86 selfloop transitions, 75 changer transitions 0/161 dead transitions. [2023-11-17 12:26:36,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 161 transitions, 1405 flow [2023-11-17 12:26:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:26:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:26:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 150 transitions. [2023-11-17 12:26:36,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2023-11-17 12:26:36,331 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 150 transitions. [2023-11-17 12:26:36,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 150 transitions. [2023-11-17 12:26:36,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:36,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 150 transitions. [2023-11-17 12:26:36,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 10.714285714285714) internal successors, (150), 14 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:36,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 30.0) internal successors, (450), 15 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:36,332 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 30.0) internal successors, (450), 15 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:36,332 INFO L175 Difference]: Start difference. First operand has 64 places, 100 transitions, 832 flow. Second operand 14 states and 150 transitions. [2023-11-17 12:26:36,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 161 transitions, 1405 flow [2023-11-17 12:26:36,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 161 transitions, 1270 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-11-17 12:26:36,342 INFO L231 Difference]: Finished difference. Result has 75 places, 118 transitions, 985 flow [2023-11-17 12:26:36,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=985, PETRI_PLACES=75, PETRI_TRANSITIONS=118} [2023-11-17 12:26:36,342 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2023-11-17 12:26:36,343 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 118 transitions, 985 flow [2023-11-17 12:26:36,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 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 12:26:36,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:36,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:36,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 12:26:36,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:36,548 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:36,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:36,549 INFO L85 PathProgramCache]: Analyzing trace with hash 843125699, now seen corresponding path program 6 times [2023-11-17 12:26:36,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:36,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526906661] [2023-11-17 12:26:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:36,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:36,637 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 12:26:36,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:36,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526906661] [2023-11-17 12:26:36,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526906661] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:36,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967675713] [2023-11-17 12:26:36,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:26:36,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:36,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:36,638 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 12:26:36,641 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 12:26:36,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:26:36,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:36,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:26:36,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:36,767 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 12:26:36,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:36,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967675713] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:36,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:26:36,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2023-11-17 12:26:36,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913395288] [2023-11-17 12:26:36,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:26:36,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:26:36,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:36,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:26:36,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:26:36,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:36,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 118 transitions, 985 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 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 12:26:36,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:36,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:36,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:37,036 INFO L124 PetriNetUnfolderBase]: 831/1232 cut-off events. [2023-11-17 12:26:37,036 INFO L125 PetriNetUnfolderBase]: For 4070/4070 co-relation queries the response was YES. [2023-11-17 12:26:37,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5487 conditions, 1232 events. 831/1232 cut-off events. For 4070/4070 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4662 event pairs, 214 based on Foata normal form. 14/1246 useless extension candidates. Maximal degree in co-relation 5452. Up to 697 conditions per place. [2023-11-17 12:26:37,042 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 89 selfloop transitions, 50 changer transitions 0/139 dead transitions. [2023-11-17 12:26:37,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 139 transitions, 1309 flow [2023-11-17 12:26:37,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:26:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:26:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2023-11-17 12:26:37,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2023-11-17 12:26:37,043 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 88 transitions. [2023-11-17 12:26:37,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 88 transitions. [2023-11-17 12:26:37,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:37,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 88 transitions. [2023-11-17 12:26:37,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 12:26:37,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:37,044 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:37,044 INFO L175 Difference]: Start difference. First operand has 75 places, 118 transitions, 985 flow. Second operand 7 states and 88 transitions. [2023-11-17 12:26:37,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 139 transitions, 1309 flow [2023-11-17 12:26:37,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 139 transitions, 1226 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-17 12:26:37,053 INFO L231 Difference]: Finished difference. Result has 73 places, 114 transitions, 966 flow [2023-11-17 12:26:37,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=966, PETRI_PLACES=73, PETRI_TRANSITIONS=114} [2023-11-17 12:26:37,053 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2023-11-17 12:26:37,053 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 114 transitions, 966 flow [2023-11-17 12:26:37,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 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 12:26:37,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:37,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:37,063 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 12:26:37,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:37,259 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:37,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:37,259 INFO L85 PathProgramCache]: Analyzing trace with hash -680422757, now seen corresponding path program 1 times [2023-11-17 12:26:37,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:37,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012724272] [2023-11-17 12:26:37,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:37,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:37,330 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 12:26:37,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:37,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012724272] [2023-11-17 12:26:37,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012724272] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:37,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638637957] [2023-11-17 12:26:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:37,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:37,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:37,332 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 12:26:37,352 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 12:26:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:37,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:26:37,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:37,436 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 12:26:37,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:37,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638637957] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:37,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:26:37,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-17 12:26:37,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576075514] [2023-11-17 12:26:37,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:26:37,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:26:37,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:26:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:26:37,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:37,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 114 transitions, 966 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:37,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:37,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:37,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:37,556 INFO L124 PetriNetUnfolderBase]: 788/1157 cut-off events. [2023-11-17 12:26:37,556 INFO L125 PetriNetUnfolderBase]: For 3858/3858 co-relation queries the response was YES. [2023-11-17 12:26:37,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5028 conditions, 1157 events. 788/1157 cut-off events. For 3858/3858 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4202 event pairs, 242 based on Foata normal form. 70/1227 useless extension candidates. Maximal degree in co-relation 4993. Up to 923 conditions per place. [2023-11-17 12:26:37,563 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 124 selfloop transitions, 14 changer transitions 0/138 dead transitions. [2023-11-17 12:26:37,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 138 transitions, 1432 flow [2023-11-17 12:26:37,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:26:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:26:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2023-11-17 12:26:37,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2023-11-17 12:26:37,564 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 58 transitions. [2023-11-17 12:26:37,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 58 transitions. [2023-11-17 12:26:37,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:37,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 58 transitions. [2023-11-17 12:26:37,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:37,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:37,564 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:37,564 INFO L175 Difference]: Start difference. First operand has 73 places, 114 transitions, 966 flow. Second operand 5 states and 58 transitions. [2023-11-17 12:26:37,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 138 transitions, 1432 flow [2023-11-17 12:26:37,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 138 transitions, 1310 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-17 12:26:37,571 INFO L231 Difference]: Finished difference. Result has 72 places, 115 transitions, 924 flow [2023-11-17 12:26:37,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=924, PETRI_PLACES=72, PETRI_TRANSITIONS=115} [2023-11-17 12:26:37,572 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2023-11-17 12:26:37,572 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 115 transitions, 924 flow [2023-11-17 12:26:37,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:37,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:37,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:37,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 12:26:37,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:37,778 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:37,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:37,778 INFO L85 PathProgramCache]: Analyzing trace with hash -687188291, now seen corresponding path program 1 times [2023-11-17 12:26:37,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:37,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843224932] [2023-11-17 12:26:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:37,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:38,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:38,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843224932] [2023-11-17 12:26:38,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843224932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:38,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235447466] [2023-11-17 12:26:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:38,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:38,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:38,260 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 12:26:38,262 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 12:26:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:38,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-17 12:26:38,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:38,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:26:38,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-17 12:26:38,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:26:38,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 12:26:38,650 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 12:26:38,757 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 15 treesize of output 7 [2023-11-17 12:26:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:38,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:39,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:26:39,005 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 136 treesize of output 104 [2023-11-17 12:26:39,016 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 96 treesize of output 84 [2023-11-17 12:26:39,022 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 44 treesize of output 38 [2023-11-17 12:26:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:39,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235447466] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:39,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:39,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-11-17 12:26:39,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324152898] [2023-11-17 12:26:39,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:39,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:26:39,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:39,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:26:39,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=632, Unknown=3, NotChecked=0, Total=756 [2023-11-17 12:26:39,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:39,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 115 transitions, 924 flow. Second operand has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:39,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:39,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:39,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:40,241 INFO L124 PetriNetUnfolderBase]: 1399/2043 cut-off events. [2023-11-17 12:26:40,242 INFO L125 PetriNetUnfolderBase]: For 5856/5856 co-relation queries the response was YES. [2023-11-17 12:26:40,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9335 conditions, 2043 events. 1399/2043 cut-off events. For 5856/5856 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8433 event pairs, 147 based on Foata normal form. 1/2044 useless extension candidates. Maximal degree in co-relation 8195. Up to 1269 conditions per place. [2023-11-17 12:26:40,255 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 232 selfloop transitions, 127 changer transitions 1/360 dead transitions. [2023-11-17 12:26:40,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 360 transitions, 3600 flow [2023-11-17 12:26:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:26:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:26:40,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2023-11-17 12:26:40,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49696969696969695 [2023-11-17 12:26:40,256 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 164 transitions. [2023-11-17 12:26:40,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 164 transitions. [2023-11-17 12:26:40,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:40,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 164 transitions. [2023-11-17 12:26:40,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 14.909090909090908) internal successors, (164), 11 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:40,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 30.0) internal successors, (360), 12 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:40,257 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 30.0) internal successors, (360), 12 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:40,257 INFO L175 Difference]: Start difference. First operand has 72 places, 115 transitions, 924 flow. Second operand 11 states and 164 transitions. [2023-11-17 12:26:40,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 360 transitions, 3600 flow [2023-11-17 12:26:40,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 360 transitions, 3563 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-17 12:26:40,277 INFO L231 Difference]: Finished difference. Result has 85 places, 215 transitions, 2215 flow [2023-11-17 12:26:40,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2215, PETRI_PLACES=85, PETRI_TRANSITIONS=215} [2023-11-17 12:26:40,278 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2023-11-17 12:26:40,278 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 215 transitions, 2215 flow [2023-11-17 12:26:40,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:40,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:40,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:40,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 12:26:40,484 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,SelfDestructingSolverStorable11 [2023-11-17 12:26:40,484 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:40,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:40,484 INFO L85 PathProgramCache]: Analyzing trace with hash 68580240, now seen corresponding path program 1 times [2023-11-17 12:26:40,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:40,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387569531] [2023-11-17 12:26:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:40,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:40,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:40,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387569531] [2023-11-17 12:26:40,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387569531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:40,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916317285] [2023-11-17 12:26:40,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:40,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:40,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:40,760 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 12:26:40,785 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 12:26:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:40,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 12:26:40,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:40,870 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 12:26:40,908 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 12:26:40,939 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 12:26:40,962 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 12:26:41,015 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 15 treesize of output 7 [2023-11-17 12:26:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:41,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:41,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916317285] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:41,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:41,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 4] total 14 [2023-11-17 12:26:41,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576574971] [2023-11-17 12:26:41,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:41,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:26:41,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:41,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:26:41,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:26:41,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:41,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 215 transitions, 2215 flow. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:41,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:41,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:41,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:41,683 INFO L124 PetriNetUnfolderBase]: 2131/3108 cut-off events. [2023-11-17 12:26:41,683 INFO L125 PetriNetUnfolderBase]: For 12688/12688 co-relation queries the response was YES. [2023-11-17 12:26:41,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16437 conditions, 3108 events. 2131/3108 cut-off events. For 12688/12688 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13862 event pairs, 249 based on Foata normal form. 1/3109 useless extension candidates. Maximal degree in co-relation 15554. Up to 1972 conditions per place. [2023-11-17 12:26:41,701 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 244 selfloop transitions, 195 changer transitions 1/440 dead transitions. [2023-11-17 12:26:41,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 440 transitions, 5287 flow [2023-11-17 12:26:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:26:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:26:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2023-11-17 12:26:41,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-17 12:26:41,702 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 130 transitions. [2023-11-17 12:26:41,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 130 transitions. [2023-11-17 12:26:41,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:41,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 130 transitions. [2023-11-17 12:26:41,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:41,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:41,704 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:41,704 INFO L175 Difference]: Start difference. First operand has 85 places, 215 transitions, 2215 flow. Second operand 9 states and 130 transitions. [2023-11-17 12:26:41,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 440 transitions, 5287 flow [2023-11-17 12:26:41,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 440 transitions, 5034 flow, removed 100 selfloop flow, removed 2 redundant places. [2023-11-17 12:26:41,738 INFO L231 Difference]: Finished difference. Result has 95 places, 324 transitions, 3841 flow [2023-11-17 12:26:41,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3841, PETRI_PLACES=95, PETRI_TRANSITIONS=324} [2023-11-17 12:26:41,738 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2023-11-17 12:26:41,738 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 324 transitions, 3841 flow [2023-11-17 12:26:41,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:41,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:41,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:41,743 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 12:26:41,943 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,SelfDestructingSolverStorable12 [2023-11-17 12:26:41,944 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:41,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:41,944 INFO L85 PathProgramCache]: Analyzing trace with hash 310327140, now seen corresponding path program 2 times [2023-11-17 12:26:41,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:41,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44957123] [2023-11-17 12:26:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:41,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:42,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:42,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44957123] [2023-11-17 12:26:42,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44957123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:42,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650380226] [2023-11-17 12:26:42,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:26:42,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:42,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:42,233 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 12:26:42,264 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 12:26:42,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:26:42,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:42,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:26:42,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:42,348 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 510 treesize of output 494 [2023-11-17 12:26:42,416 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 12:26:42,440 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 15 treesize of output 7 [2023-11-17 12:26:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:42,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:42,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:26:42,541 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 56 treesize of output 44 [2023-11-17 12:26:42,544 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 18 treesize of output 16 [2023-11-17 12:26:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:42,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650380226] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:42,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:42,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:26:42,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010476590] [2023-11-17 12:26:42,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:42,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:26:42,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:42,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:26:42,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=209, Unknown=4, NotChecked=0, Total=272 [2023-11-17 12:26:42,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:42,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 324 transitions, 3841 flow. Second operand has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 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 12:26:42,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:42,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:42,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:43,467 INFO L124 PetriNetUnfolderBase]: 2729/3977 cut-off events. [2023-11-17 12:26:43,467 INFO L125 PetriNetUnfolderBase]: For 20600/20600 co-relation queries the response was YES. [2023-11-17 12:26:43,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23416 conditions, 3977 events. 2729/3977 cut-off events. For 20600/20600 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18751 event pairs, 324 based on Foata normal form. 1/3978 useless extension candidates. Maximal degree in co-relation 22625. Up to 2212 conditions per place. [2023-11-17 12:26:43,493 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 247 selfloop transitions, 278 changer transitions 1/526 dead transitions. [2023-11-17 12:26:43,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 526 transitions, 7017 flow [2023-11-17 12:26:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:26:43,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:26:43,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2023-11-17 12:26:43,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2023-11-17 12:26:43,494 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 125 transitions. [2023-11-17 12:26:43,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 125 transitions. [2023-11-17 12:26:43,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:43,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 125 transitions. [2023-11-17 12:26:43,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:43,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:43,495 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:43,495 INFO L175 Difference]: Start difference. First operand has 95 places, 324 transitions, 3841 flow. Second operand 8 states and 125 transitions. [2023-11-17 12:26:43,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 526 transitions, 7017 flow [2023-11-17 12:26:43,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 526 transitions, 6902 flow, removed 55 selfloop flow, removed 2 redundant places. [2023-11-17 12:26:43,557 INFO L231 Difference]: Finished difference. Result has 103 places, 410 transitions, 5711 flow [2023-11-17 12:26:43,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=3726, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5711, PETRI_PLACES=103, PETRI_TRANSITIONS=410} [2023-11-17 12:26:43,558 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2023-11-17 12:26:43,558 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 410 transitions, 5711 flow [2023-11-17 12:26:43,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 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 12:26:43,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:43,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:43,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 12:26:43,765 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,SelfDestructingSolverStorable13 [2023-11-17 12:26:43,765 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:43,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:43,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1371240009, now seen corresponding path program 2 times [2023-11-17 12:26:43,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:43,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456049307] [2023-11-17 12:26:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:43,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:44,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:44,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456049307] [2023-11-17 12:26:44,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456049307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:44,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474438467] [2023-11-17 12:26:44,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:26:44,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:44,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:44,287 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 12:26:44,304 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 12:26:44,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:26:44,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:44,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:26:44,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:44,509 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 15 treesize of output 7 [2023-11-17 12:26:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:44,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:44,583 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:26:44,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-11-17 12:26:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:44,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474438467] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:44,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:44,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 22 [2023-11-17 12:26:44,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205360351] [2023-11-17 12:26:44,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:44,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:26:44,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:44,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:26:44,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:26:44,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:44,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 410 transitions, 5711 flow. Second operand has 24 states, 24 states have (on average 6.666666666666667) internal successors, (160), 24 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:44,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:44,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:44,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:45,649 INFO L124 PetriNetUnfolderBase]: 2879/4216 cut-off events. [2023-11-17 12:26:45,649 INFO L125 PetriNetUnfolderBase]: For 29639/29639 co-relation queries the response was YES. [2023-11-17 12:26:45,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27333 conditions, 4216 events. 2879/4216 cut-off events. For 29639/29639 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20099 event pairs, 488 based on Foata normal form. 1/4217 useless extension candidates. Maximal degree in co-relation 26511. Up to 3742 conditions per place. [2023-11-17 12:26:45,680 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 403 selfloop transitions, 103 changer transitions 1/507 dead transitions. [2023-11-17 12:26:45,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 507 transitions, 7681 flow [2023-11-17 12:26:45,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:26:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:26:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2023-11-17 12:26:45,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2023-11-17 12:26:45,681 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 139 transitions. [2023-11-17 12:26:45,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 139 transitions. [2023-11-17 12:26:45,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:45,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 139 transitions. [2023-11-17 12:26:45,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 11.583333333333334) internal successors, (139), 12 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:45,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 30.0) internal successors, (390), 13 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:45,682 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 30.0) internal successors, (390), 13 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:45,682 INFO L175 Difference]: Start difference. First operand has 103 places, 410 transitions, 5711 flow. Second operand 12 states and 139 transitions. [2023-11-17 12:26:45,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 507 transitions, 7681 flow [2023-11-17 12:26:45,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 507 transitions, 7470 flow, removed 46 selfloop flow, removed 3 redundant places. [2023-11-17 12:26:45,806 INFO L231 Difference]: Finished difference. Result has 118 places, 455 transitions, 6518 flow [2023-11-17 12:26:45,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=5526, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6518, PETRI_PLACES=118, PETRI_TRANSITIONS=455} [2023-11-17 12:26:45,806 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2023-11-17 12:26:45,806 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 455 transitions, 6518 flow [2023-11-17 12:26:45,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.666666666666667) internal successors, (160), 24 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:45,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:45,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:45,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 12:26:46,010 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,SelfDestructingSolverStorable14 [2023-11-17 12:26:46,011 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:46,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:46,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1139016513, now seen corresponding path program 3 times [2023-11-17 12:26:46,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:46,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457138677] [2023-11-17 12:26:46,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:46,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:46,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457138677] [2023-11-17 12:26:46,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457138677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419072394] [2023-11-17 12:26:46,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:26:46,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:46,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:46,567 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 12:26:46,584 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 12:26:46,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:26:46,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:46,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 12:26:46,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:46,922 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 15 treesize of output 7 [2023-11-17 12:26:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:46,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:47,013 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:26:47,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-11-17 12:26:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:47,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419072394] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:47,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:47,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-11-17 12:26:47,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904205900] [2023-11-17 12:26:47,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:47,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:26:47,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:47,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:26:47,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:26:47,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:47,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 455 transitions, 6518 flow. Second operand has 25 states, 25 states have (on average 6.76) internal successors, (169), 25 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:47,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:47,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:47,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:48,557 INFO L124 PetriNetUnfolderBase]: 3565/5178 cut-off events. [2023-11-17 12:26:48,557 INFO L125 PetriNetUnfolderBase]: For 38758/38758 co-relation queries the response was YES. [2023-11-17 12:26:48,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34250 conditions, 5178 events. 3565/5178 cut-off events. For 38758/38758 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 25239 event pairs, 554 based on Foata normal form. 3/5181 useless extension candidates. Maximal degree in co-relation 33396. Up to 4197 conditions per place. [2023-11-17 12:26:48,599 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 512 selfloop transitions, 165 changer transitions 3/680 dead transitions. [2023-11-17 12:26:48,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 680 transitions, 10332 flow [2023-11-17 12:26:48,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:26:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:26:48,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 222 transitions. [2023-11-17 12:26:48,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2023-11-17 12:26:48,600 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 222 transitions. [2023-11-17 12:26:48,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 222 transitions. [2023-11-17 12:26:48,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:48,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 222 transitions. [2023-11-17 12:26:48,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 14.8) internal successors, (222), 15 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:48,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 30.0) internal successors, (480), 16 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:48,602 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 30.0) internal successors, (480), 16 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:48,602 INFO L175 Difference]: Start difference. First operand has 118 places, 455 transitions, 6518 flow. Second operand 15 states and 222 transitions. [2023-11-17 12:26:48,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 680 transitions, 10332 flow [2023-11-17 12:26:48,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 680 transitions, 10141 flow, removed 63 selfloop flow, removed 3 redundant places. [2023-11-17 12:26:48,759 INFO L231 Difference]: Finished difference. Result has 139 places, 535 transitions, 8044 flow [2023-11-17 12:26:48,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=6392, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8044, PETRI_PLACES=139, PETRI_TRANSITIONS=535} [2023-11-17 12:26:48,760 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 109 predicate places. [2023-11-17 12:26:48,760 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 535 transitions, 8044 flow [2023-11-17 12:26:48,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.76) internal successors, (169), 25 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:48,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:48,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:48,768 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 12:26:48,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 12:26:48,965 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:48,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1754967217, now seen corresponding path program 4 times [2023-11-17 12:26:48,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:48,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343824902] [2023-11-17 12:26:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:48,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:49,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:49,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343824902] [2023-11-17 12:26:49,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343824902] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:49,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040246304] [2023-11-17 12:26:49,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:26:49,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:49,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:49,510 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 12:26:49,511 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 12:26:49,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:26:49,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:49,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 12:26:49,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:49,748 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 15 treesize of output 7 [2023-11-17 12:26:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:49,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:49,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:26:49,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-11-17 12:26:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:50,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040246304] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:50,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:50,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 26 [2023-11-17 12:26:50,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570551365] [2023-11-17 12:26:50,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:50,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:26:50,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:50,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:26:50,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2023-11-17 12:26:50,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:50,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 535 transitions, 8044 flow. Second operand has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:50,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:50,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:50,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:51,501 INFO L124 PetriNetUnfolderBase]: 3900/5673 cut-off events. [2023-11-17 12:26:51,501 INFO L125 PetriNetUnfolderBase]: For 50039/50039 co-relation queries the response was YES. [2023-11-17 12:26:51,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39632 conditions, 5673 events. 3900/5673 cut-off events. For 50039/50039 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28123 event pairs, 634 based on Foata normal form. 2/5675 useless extension candidates. Maximal degree in co-relation 38679. Up to 5049 conditions per place. [2023-11-17 12:26:51,536 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 498 selfloop transitions, 161 changer transitions 2/661 dead transitions. [2023-11-17 12:26:51,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 661 transitions, 10774 flow [2023-11-17 12:26:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:26:51,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:26:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 171 transitions. [2023-11-17 12:26:51,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2023-11-17 12:26:51,538 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 171 transitions. [2023-11-17 12:26:51,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 171 transitions. [2023-11-17 12:26:51,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:51,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 171 transitions. [2023-11-17 12:26:51,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 12.214285714285714) internal successors, (171), 14 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:51,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 30.0) internal successors, (450), 15 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:51,539 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 30.0) internal successors, (450), 15 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:51,539 INFO L175 Difference]: Start difference. First operand has 139 places, 535 transitions, 8044 flow. Second operand 14 states and 171 transitions. [2023-11-17 12:26:51,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 661 transitions, 10774 flow [2023-11-17 12:26:51,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 661 transitions, 10401 flow, removed 142 selfloop flow, removed 4 redundant places. [2023-11-17 12:26:51,693 INFO L231 Difference]: Finished difference. Result has 154 places, 589 transitions, 8949 flow [2023-11-17 12:26:51,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=7735, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8949, PETRI_PLACES=154, PETRI_TRANSITIONS=589} [2023-11-17 12:26:51,694 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2023-11-17 12:26:51,694 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 589 transitions, 8949 flow [2023-11-17 12:26:51,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:51,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:51,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:51,699 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 12:26:51,899 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,SelfDestructingSolverStorable16 [2023-11-17 12:26:51,899 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:51,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:51,900 INFO L85 PathProgramCache]: Analyzing trace with hash -493260042, now seen corresponding path program 3 times [2023-11-17 12:26:51,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:51,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742297205] [2023-11-17 12:26:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:51,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:52,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:52,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742297205] [2023-11-17 12:26:52,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742297205] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:52,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867916372] [2023-11-17 12:26:52,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:26:52,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:52,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:52,121 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 12:26:52,147 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 12:26:52,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:26:52,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:52,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:26:52,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:52,272 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 15 treesize of output 7 [2023-11-17 12:26:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:52,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:52,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:26:52,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-11-17 12:26:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:52,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867916372] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:52,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:52,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 10 [2023-11-17 12:26:52,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973338751] [2023-11-17 12:26:52,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:52,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:26:52,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:52,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:26:52,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:26:52,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:52,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 589 transitions, 8949 flow. Second operand has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 12 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:52,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:52,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:52,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:53,527 INFO L124 PetriNetUnfolderBase]: 4248/6158 cut-off events. [2023-11-17 12:26:53,528 INFO L125 PetriNetUnfolderBase]: For 55677/55677 co-relation queries the response was YES. [2023-11-17 12:26:53,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43351 conditions, 6158 events. 4248/6158 cut-off events. For 55677/55677 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30790 event pairs, 767 based on Foata normal form. 1/6159 useless extension candidates. Maximal degree in co-relation 42465. Up to 5425 conditions per place. [2023-11-17 12:26:53,566 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 514 selfloop transitions, 194 changer transitions 1/709 dead transitions. [2023-11-17 12:26:53,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 709 transitions, 11818 flow [2023-11-17 12:26:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:26:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:26:53,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2023-11-17 12:26:53,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2023-11-17 12:26:53,568 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 117 transitions. [2023-11-17 12:26:53,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 117 transitions. [2023-11-17 12:26:53,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:53,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 117 transitions. [2023-11-17 12:26:53,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:53,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:53,569 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:53,569 INFO L175 Difference]: Start difference. First operand has 154 places, 589 transitions, 8949 flow. Second operand 8 states and 117 transitions. [2023-11-17 12:26:53,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 709 transitions, 11818 flow [2023-11-17 12:26:53,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 709 transitions, 11579 flow, removed 39 selfloop flow, removed 4 redundant places. [2023-11-17 12:26:53,760 INFO L231 Difference]: Finished difference. Result has 159 places, 640 transitions, 10081 flow [2023-11-17 12:26:53,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=8710, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10081, PETRI_PLACES=159, PETRI_TRANSITIONS=640} [2023-11-17 12:26:53,760 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 129 predicate places. [2023-11-17 12:26:53,761 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 640 transitions, 10081 flow [2023-11-17 12:26:53,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 12 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:53,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:53,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:53,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-17 12:26:53,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:53,965 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:53,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:53,965 INFO L85 PathProgramCache]: Analyzing trace with hash 480125587, now seen corresponding path program 5 times [2023-11-17 12:26:53,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:53,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626138641] [2023-11-17 12:26:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:53,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:54,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626138641] [2023-11-17 12:26:54,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626138641] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345797954] [2023-11-17 12:26:54,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:26:54,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:54,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:54,475 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 12:26:54,489 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 12:26:54,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:26:54,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:54,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 12:26:54,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:54,769 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 15 treesize of output 7 [2023-11-17 12:26:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:54,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:54,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:26:54,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-11-17 12:26:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:55,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345797954] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:55,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:55,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 22 [2023-11-17 12:26:55,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90069005] [2023-11-17 12:26:55,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:55,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:26:55,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:26:55,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:26:55,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:55,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 640 transitions, 10081 flow. Second operand has 24 states, 24 states have (on average 6.791666666666667) internal successors, (163), 24 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 12:26:55,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:55,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:55,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:56,405 INFO L124 PetriNetUnfolderBase]: 4372/6361 cut-off events. [2023-11-17 12:26:56,406 INFO L125 PetriNetUnfolderBase]: For 62887/62887 co-relation queries the response was YES. [2023-11-17 12:26:56,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45918 conditions, 6361 events. 4372/6361 cut-off events. For 62887/62887 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 32150 event pairs, 828 based on Foata normal form. 2/6363 useless extension candidates. Maximal degree in co-relation 45014. Up to 5700 conditions per place. [2023-11-17 12:26:56,451 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 585 selfloop transitions, 156 changer transitions 2/743 dead transitions. [2023-11-17 12:26:56,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 743 transitions, 12791 flow [2023-11-17 12:26:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:26:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:26:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 160 transitions. [2023-11-17 12:26:56,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-17 12:26:56,453 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 160 transitions. [2023-11-17 12:26:56,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 160 transitions. [2023-11-17 12:26:56,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:56,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 160 transitions. [2023-11-17 12:26:56,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 13.333333333333334) internal successors, (160), 12 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:56,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 30.0) internal successors, (390), 13 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:56,454 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 30.0) internal successors, (390), 13 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:56,454 INFO L175 Difference]: Start difference. First operand has 159 places, 640 transitions, 10081 flow. Second operand 12 states and 160 transitions. [2023-11-17 12:26:56,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 743 transitions, 12791 flow [2023-11-17 12:26:56,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 743 transitions, 12381 flow, removed 46 selfloop flow, removed 5 redundant places. [2023-11-17 12:26:56,801 INFO L231 Difference]: Finished difference. Result has 169 places, 653 transitions, 10286 flow [2023-11-17 12:26:56,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=9687, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10286, PETRI_PLACES=169, PETRI_TRANSITIONS=653} [2023-11-17 12:26:56,802 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2023-11-17 12:26:56,802 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 653 transitions, 10286 flow [2023-11-17 12:26:56,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.791666666666667) internal successors, (163), 24 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 12:26:56,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:56,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:56,840 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 12:26:57,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:57,006 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:26:57,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:57,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1407721672, now seen corresponding path program 4 times [2023-11-17 12:26:57,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:57,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737487401] [2023-11-17 12:26:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:57,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:57,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:57,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737487401] [2023-11-17 12:26:57,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737487401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:57,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654002912] [2023-11-17 12:26:57,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:26:57,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:57,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:57,313 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 12:26:57,332 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 12:26:57,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:26:57,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:57,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 12:26:57,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:57,449 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 12:26:57,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:26:57,523 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 12:26:57,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:26:57,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 12:26:57,649 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 15 treesize of output 7 [2023-11-17 12:26:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:57,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:57,749 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_586 (Array Int Int))) (= (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_586) c_~A~0.base) (+ c_~A~0.offset (* c_thread2Thread1of1ForFork2_~i~1 4))) c_~sum3~0 c_~sum2~0) 4294967296) (mod c_~sum1~0 4294967296))) is different from false [2023-11-17 12:26:57,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:26:57,904 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 59 treesize of output 48 [2023-11-17 12:26:57,907 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 3414 treesize of output 3222 [2023-11-17 12:26:57,915 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 192 treesize of output 184 [2023-11-17 12:26:57,917 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 184 treesize of output 172 [2023-11-17 12:26:57,923 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 88 treesize of output 82 [2023-11-17 12:26:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:58,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654002912] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:58,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:58,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2023-11-17 12:26:58,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40759830] [2023-11-17 12:26:58,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:58,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:26:58,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:58,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:26:58,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=417, Unknown=20, NotChecked=44, Total=600 [2023-11-17 12:26:58,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:26:58,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 653 transitions, 10286 flow. Second operand has 25 states, 25 states have (on average 6.24) internal successors, (156), 25 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:58,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:58,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:26:58,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:00,415 INFO L124 PetriNetUnfolderBase]: 4688/6811 cut-off events. [2023-11-17 12:27:00,415 INFO L125 PetriNetUnfolderBase]: For 66163/66163 co-relation queries the response was YES. [2023-11-17 12:27:00,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48784 conditions, 6811 events. 4688/6811 cut-off events. For 66163/66163 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 34861 event pairs, 876 based on Foata normal form. 1/6812 useless extension candidates. Maximal degree in co-relation 48045. Up to 5774 conditions per place. [2023-11-17 12:27:00,463 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 540 selfloop transitions, 226 changer transitions 2/768 dead transitions. [2023-11-17 12:27:00,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 768 transitions, 13035 flow [2023-11-17 12:27:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:27:00,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:27:00,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2023-11-17 12:27:00,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-11-17 12:27:00,464 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 140 transitions. [2023-11-17 12:27:00,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 140 transitions. [2023-11-17 12:27:00,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:00,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 140 transitions. [2023-11-17 12:27:00,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 14.0) internal successors, (140), 10 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:00,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:27:00,465 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:27:00,465 INFO L175 Difference]: Start difference. First operand has 169 places, 653 transitions, 10286 flow. Second operand 10 states and 140 transitions. [2023-11-17 12:27:00,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 768 transitions, 13035 flow [2023-11-17 12:27:00,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 768 transitions, 12828 flow, removed 41 selfloop flow, removed 6 redundant places. [2023-11-17 12:27:00,725 INFO L231 Difference]: Finished difference. Result has 174 places, 685 transitions, 11167 flow [2023-11-17 12:27:00,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=10083, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11167, PETRI_PLACES=174, PETRI_TRANSITIONS=685} [2023-11-17 12:27:00,726 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2023-11-17 12:27:00,726 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 685 transitions, 11167 flow [2023-11-17 12:27:00,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.24) internal successors, (156), 25 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:00,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:00,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:00,731 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 12:27:00,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:00,927 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:27:00,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:00,927 INFO L85 PathProgramCache]: Analyzing trace with hash 611836458, now seen corresponding path program 5 times [2023-11-17 12:27:00,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:00,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955064747] [2023-11-17 12:27:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:00,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:01,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:01,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955064747] [2023-11-17 12:27:01,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955064747] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:01,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500324927] [2023-11-17 12:27:01,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:27:01,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:01,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:01,186 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 12:27:01,212 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 12:27:01,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:27:01,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:01,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:27:01,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:01,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:27:01,433 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 12:27:01,455 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 15 treesize of output 7 [2023-11-17 12:27:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:01,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:01,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:27:01,550 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 64 treesize of output 48 [2023-11-17 12:27:01,553 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 22 treesize of output 16 [2023-11-17 12:27:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:01,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500324927] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:01,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:01,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-17 12:27:01,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210862595] [2023-11-17 12:27:01,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:01,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:27:01,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:01,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:27:01,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=353, Unknown=1, NotChecked=0, Total=462 [2023-11-17 12:27:01,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:27:01,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 685 transitions, 11167 flow. Second operand has 22 states, 22 states have (on average 7.045454545454546) internal successors, (155), 22 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:01,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:01,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:27:01,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:02,985 INFO L124 PetriNetUnfolderBase]: 4786/6956 cut-off events. [2023-11-17 12:27:02,985 INFO L125 PetriNetUnfolderBase]: For 75775/75775 co-relation queries the response was YES. [2023-11-17 12:27:03,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51229 conditions, 6956 events. 4786/6956 cut-off events. For 75775/75775 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 35731 event pairs, 943 based on Foata normal form. 1/6957 useless extension candidates. Maximal degree in co-relation 50515. Up to 6279 conditions per place. [2023-11-17 12:27:03,120 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 586 selfloop transitions, 153 changer transitions 1/740 dead transitions. [2023-11-17 12:27:03,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 740 transitions, 13207 flow [2023-11-17 12:27:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:27:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:27:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2023-11-17 12:27:03,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-11-17 12:27:03,121 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 114 transitions. [2023-11-17 12:27:03,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 114 transitions. [2023-11-17 12:27:03,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:03,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 114 transitions. [2023-11-17 12:27:03,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.25) internal successors, (114), 8 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 12:27:03,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:03,122 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:03,122 INFO L175 Difference]: Start difference. First operand has 174 places, 685 transitions, 11167 flow. Second operand 8 states and 114 transitions. [2023-11-17 12:27:03,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 740 transitions, 13207 flow [2023-11-17 12:27:03,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 740 transitions, 12803 flow, removed 41 selfloop flow, removed 6 redundant places. [2023-11-17 12:27:03,478 INFO L231 Difference]: Finished difference. Result has 176 places, 689 transitions, 11181 flow [2023-11-17 12:27:03,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=10763, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11181, PETRI_PLACES=176, PETRI_TRANSITIONS=689} [2023-11-17 12:27:03,479 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 146 predicate places. [2023-11-17 12:27:03,479 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 689 transitions, 11181 flow [2023-11-17 12:27:03,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.045454545454546) internal successors, (155), 22 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:03,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:03,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:03,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-17 12:27:03,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:03,685 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:27:03,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:03,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1170567050, now seen corresponding path program 6 times [2023-11-17 12:27:03,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:03,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106724219] [2023-11-17 12:27:03,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:03,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:27:04,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:04,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106724219] [2023-11-17 12:27:04,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106724219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:04,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722648106] [2023-11-17 12:27:04,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:27:04,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:04,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:04,150 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 12:27:04,150 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 12:27:04,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:27:04,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:04,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:27:04,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:04,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:27:04,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-17 12:27:04,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:27:04,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 12:27:04,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 12:27:04,418 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 15 treesize of output 7 [2023-11-17 12:27:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:04,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:04,597 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_656 (Array Int Int)) (v_ArrVal_655 (Array Int Int))) (= (mod (+ c_~sum3~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_655) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_656) c_~A~0.base) c_~A~0.offset) c_~sum2~0) 4294967296) (mod c_~sum1~0 4294967296))) is different from false [2023-11-17 12:27:04,605 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:27:04,606 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 250 treesize of output 186 [2023-11-17 12:27:04,610 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 41 treesize of output 39 [2023-11-17 12:27:04,613 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 42 treesize of output 38 [2023-11-17 12:27:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:04,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722648106] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:04,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:04,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-17 12:27:04,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193168250] [2023-11-17 12:27:04,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:04,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:27:04,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:04,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:27:04,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=371, Unknown=2, NotChecked=40, Total=506 [2023-11-17 12:27:04,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:27:04,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 689 transitions, 11181 flow. Second operand has 23 states, 23 states have (on average 6.391304347826087) internal successors, (147), 23 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:04,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:04,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:27:04,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:06,397 INFO L124 PetriNetUnfolderBase]: 5096/7417 cut-off events. [2023-11-17 12:27:06,397 INFO L125 PetriNetUnfolderBase]: For 82429/82429 co-relation queries the response was YES. [2023-11-17 12:27:06,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54450 conditions, 7417 events. 5096/7417 cut-off events. For 82429/82429 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 38710 event pairs, 788 based on Foata normal form. 1/7418 useless extension candidates. Maximal degree in co-relation 53735. Up to 4514 conditions per place. [2023-11-17 12:27:06,459 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 333 selfloop transitions, 495 changer transitions 1/829 dead transitions. [2023-11-17 12:27:06,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 829 transitions, 14565 flow [2023-11-17 12:27:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:27:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:27:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2023-11-17 12:27:06,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-17 12:27:06,460 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 130 transitions. [2023-11-17 12:27:06,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 130 transitions. [2023-11-17 12:27:06,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:06,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 130 transitions. [2023-11-17 12:27:06,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:06,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:06,461 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:06,461 INFO L175 Difference]: Start difference. First operand has 176 places, 689 transitions, 11181 flow. Second operand 9 states and 130 transitions. [2023-11-17 12:27:06,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 829 transitions, 14565 flow [2023-11-17 12:27:06,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 829 transitions, 14199 flow, removed 35 selfloop flow, removed 6 redundant places. [2023-11-17 12:27:06,828 INFO L231 Difference]: Finished difference. Result has 181 places, 733 transitions, 13135 flow [2023-11-17 12:27:06,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=10825, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13135, PETRI_PLACES=181, PETRI_TRANSITIONS=733} [2023-11-17 12:27:06,829 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2023-11-17 12:27:06,829 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 733 transitions, 13135 flow [2023-11-17 12:27:06,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.391304347826087) internal successors, (147), 23 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:06,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:06,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:06,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 12:27:07,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:07,035 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:27:07,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:07,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1919477939, now seen corresponding path program 6 times [2023-11-17 12:27:07,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:07,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122088941] [2023-11-17 12:27:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:07,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:27:07,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:07,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122088941] [2023-11-17 12:27:07,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122088941] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:07,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984611049] [2023-11-17 12:27:07,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:27:07,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:07,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:07,529 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 12:27:07,533 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 12:27:07,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:27:07,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:07,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 12:27:07,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:07,835 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 15 treesize of output 7 [2023-11-17 12:27:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:27:07,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:07,916 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:27:07,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-11-17 12:27:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:27:08,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984611049] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:08,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:08,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-11-17 12:27:08,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776260440] [2023-11-17 12:27:08,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:08,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:27:08,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:08,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:27:08,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:27:08,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:27:08,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 733 transitions, 13135 flow. Second operand has 25 states, 25 states have (on average 6.76) internal successors, (169), 25 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:08,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:08,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:27:08,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:10,219 INFO L124 PetriNetUnfolderBase]: 5526/8026 cut-off events. [2023-11-17 12:27:10,219 INFO L125 PetriNetUnfolderBase]: For 108247/108247 co-relation queries the response was YES. [2023-11-17 12:27:10,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62785 conditions, 8026 events. 5526/8026 cut-off events. For 108247/108247 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 42373 event pairs, 1036 based on Foata normal form. 3/8029 useless extension candidates. Maximal degree in co-relation 61822. Up to 6830 conditions per place. [2023-11-17 12:27:10,279 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 691 selfloop transitions, 219 changer transitions 6/916 dead transitions. [2023-11-17 12:27:10,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 916 transitions, 17401 flow [2023-11-17 12:27:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:27:10,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:27:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 212 transitions. [2023-11-17 12:27:10,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4711111111111111 [2023-11-17 12:27:10,280 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 212 transitions. [2023-11-17 12:27:10,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 212 transitions. [2023-11-17 12:27:10,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:10,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 212 transitions. [2023-11-17 12:27:10,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 14.133333333333333) internal successors, (212), 15 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:10,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 30.0) internal successors, (480), 16 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:10,281 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 30.0) internal successors, (480), 16 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:10,281 INFO L175 Difference]: Start difference. First operand has 181 places, 733 transitions, 13135 flow. Second operand 15 states and 212 transitions. [2023-11-17 12:27:10,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 916 transitions, 17401 flow [2023-11-17 12:27:10,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 916 transitions, 16942 flow, removed 146 selfloop flow, removed 4 redundant places. [2023-11-17 12:27:10,800 INFO L231 Difference]: Finished difference. Result has 201 places, 784 transitions, 14411 flow [2023-11-17 12:27:10,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=12738, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=14411, PETRI_PLACES=201, PETRI_TRANSITIONS=784} [2023-11-17 12:27:10,801 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2023-11-17 12:27:10,801 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 784 transitions, 14411 flow [2023-11-17 12:27:10,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.76) internal successors, (169), 25 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:10,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:10,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:10,808 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 12:27:11,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:11,002 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:27:11,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:11,002 INFO L85 PathProgramCache]: Analyzing trace with hash -643831430, now seen corresponding path program 7 times [2023-11-17 12:27:11,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:11,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109118867] [2023-11-17 12:27:11,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:11,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:11,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:11,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109118867] [2023-11-17 12:27:11,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109118867] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:11,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199697770] [2023-11-17 12:27:11,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:27:11,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:11,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:11,229 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 12:27:11,248 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 12:27:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:11,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 12:27:11,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:11,372 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 12:27:11,403 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 12:27:11,441 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 12:27:11,491 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 12:27:11,528 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 15 treesize of output 7 [2023-11-17 12:27:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:27:11,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:11,661 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_725 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_725) c_~A~0.base))) (= (mod (+ c_~sum1~0 (select .cse0 c_~A~0.offset)) 4294967296) (mod (+ (select .cse0 (+ c_~A~0.offset (* c_thread2Thread1of1ForFork2_~i~1 4))) c_~sum3~0 c_~sum2~0) 4294967296)))) is different from false [2023-11-17 12:27:11,665 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_725 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_725) c_~A~0.base) c_~A~0.offset))) (= (mod (+ c_~sum1~0 .cse0) 4294967296) (mod (+ .cse0 c_~sum3~0 c_~sum2~0) 4294967296)))) is different from false [2023-11-17 12:27:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:11,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199697770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:11,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:11,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 17 [2023-11-17 12:27:11,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137789929] [2023-11-17 12:27:11,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:11,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:27:11,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:11,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:27:11,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=207, Unknown=2, NotChecked=62, Total=342 [2023-11-17 12:27:11,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:27:11,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 784 transitions, 14411 flow. Second operand has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:11,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:11,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:27:11,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:13,442 INFO L124 PetriNetUnfolderBase]: 5632/8183 cut-off events. [2023-11-17 12:27:13,442 INFO L125 PetriNetUnfolderBase]: For 115635/115635 co-relation queries the response was YES. [2023-11-17 12:27:13,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65952 conditions, 8183 events. 5632/8183 cut-off events. For 115635/115635 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 43193 event pairs, 1212 based on Foata normal form. 1/8184 useless extension candidates. Maximal degree in co-relation 65252. Up to 7450 conditions per place. [2023-11-17 12:27:13,504 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 670 selfloop transitions, 197 changer transitions 1/868 dead transitions. [2023-11-17 12:27:13,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 868 transitions, 17241 flow [2023-11-17 12:27:13,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:27:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:27:13,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2023-11-17 12:27:13,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44074074074074077 [2023-11-17 12:27:13,505 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 119 transitions. [2023-11-17 12:27:13,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 119 transitions. [2023-11-17 12:27:13,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:13,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 119 transitions. [2023-11-17 12:27:13,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:13,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:13,506 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:13,506 INFO L175 Difference]: Start difference. First operand has 201 places, 784 transitions, 14411 flow. Second operand 9 states and 119 transitions. [2023-11-17 12:27:13,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 868 transitions, 17241 flow [2023-11-17 12:27:13,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 868 transitions, 16676 flow, removed 256 selfloop flow, removed 3 redundant places. [2023-11-17 12:27:13,966 INFO L231 Difference]: Finished difference. Result has 208 places, 800 transitions, 14712 flow [2023-11-17 12:27:13,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=13866, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14712, PETRI_PLACES=208, PETRI_TRANSITIONS=800} [2023-11-17 12:27:13,966 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2023-11-17 12:27:13,966 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 800 transitions, 14712 flow [2023-11-17 12:27:13,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:13,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:13,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:13,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 12:27:14,170 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,SelfDestructingSolverStorable23 [2023-11-17 12:27:14,170 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:27:14,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:14,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1865227606, now seen corresponding path program 8 times [2023-11-17 12:27:14,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:14,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829817002] [2023-11-17 12:27:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:14,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:14,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:14,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829817002] [2023-11-17 12:27:14,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829817002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:14,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288255078] [2023-11-17 12:27:14,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:27:14,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:14,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:14,403 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 12:27:14,404 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 12:27:14,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:27:14,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:14,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:27:14,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:14,560 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 15 treesize of output 7 [2023-11-17 12:27:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:14,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:14,660 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:27:14,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-11-17 12:27:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:14,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288255078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:14,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:14,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 10 [2023-11-17 12:27:14,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472116907] [2023-11-17 12:27:14,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:14,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:27:14,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:14,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:27:14,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:27:14,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:27:14,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 800 transitions, 14712 flow. Second operand has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 12 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:14,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:14,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:27:14,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:16,427 INFO L124 PetriNetUnfolderBase]: 5844/8490 cut-off events. [2023-11-17 12:27:16,427 INFO L125 PetriNetUnfolderBase]: For 119244/119244 co-relation queries the response was YES. [2023-11-17 12:27:16,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67351 conditions, 8490 events. 5844/8490 cut-off events. For 119244/119244 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 45086 event pairs, 1123 based on Foata normal form. 1/8491 useless extension candidates. Maximal degree in co-relation 66867. Up to 7803 conditions per place. [2023-11-17 12:27:16,626 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 713 selfloop transitions, 150 changer transitions 1/864 dead transitions. [2023-11-17 12:27:16,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 864 transitions, 17162 flow [2023-11-17 12:27:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:27:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:27:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2023-11-17 12:27:16,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-11-17 12:27:16,627 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 112 transitions. [2023-11-17 12:27:16,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 112 transitions. [2023-11-17 12:27:16,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:16,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 112 transitions. [2023-11-17 12:27:16,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:16,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:16,627 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:16,627 INFO L175 Difference]: Start difference. First operand has 208 places, 800 transitions, 14712 flow. Second operand 8 states and 112 transitions. [2023-11-17 12:27:16,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 864 transitions, 17162 flow [2023-11-17 12:27:17,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 864 transitions, 16622 flow, removed 113 selfloop flow, removed 6 redundant places. [2023-11-17 12:27:17,141 INFO L231 Difference]: Finished difference. Result has 212 places, 816 transitions, 14786 flow [2023-11-17 12:27:17,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=14172, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14786, PETRI_PLACES=212, PETRI_TRANSITIONS=816} [2023-11-17 12:27:17,141 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2023-11-17 12:27:17,141 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 816 transitions, 14786 flow [2023-11-17 12:27:17,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 12 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:17,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:17,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:17,153 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 12:27:17,346 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,SelfDestructingSolverStorable24 [2023-11-17 12:27:17,346 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:27:17,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1215520500, now seen corresponding path program 9 times [2023-11-17 12:27:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:17,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530658431] [2023-11-17 12:27:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:17,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:17,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:17,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530658431] [2023-11-17 12:27:17,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530658431] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:17,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764726219] [2023-11-17 12:27:17,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:27:17,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:17,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:17,563 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 12:27:17,568 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 12:27:17,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:27:17,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:17,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:27:17,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:17,725 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 15 treesize of output 7 [2023-11-17 12:27:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:17,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:17,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:27:17,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-11-17 12:27:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:17,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764726219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:17,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:17,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 10 [2023-11-17 12:27:17,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376308831] [2023-11-17 12:27:17,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:17,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:27:17,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:17,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:27:17,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:27:17,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:27:17,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 816 transitions, 14786 flow. Second operand has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 12 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:17,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:17,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:27:17,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:19,759 INFO L124 PetriNetUnfolderBase]: 5950/8647 cut-off events. [2023-11-17 12:27:19,759 INFO L125 PetriNetUnfolderBase]: For 119605/119605 co-relation queries the response was YES. [2023-11-17 12:27:19,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67795 conditions, 8647 events. 5950/8647 cut-off events. For 119605/119605 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 46066 event pairs, 1312 based on Foata normal form. 1/8648 useless extension candidates. Maximal degree in co-relation 67306. Up to 8106 conditions per place. [2023-11-17 12:27:19,845 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 723 selfloop transitions, 148 changer transitions 1/872 dead transitions. [2023-11-17 12:27:19,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 872 transitions, 17220 flow [2023-11-17 12:27:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:27:19,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:27:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2023-11-17 12:27:19,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2023-11-17 12:27:19,846 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 111 transitions. [2023-11-17 12:27:19,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 111 transitions. [2023-11-17 12:27:19,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:19,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 111 transitions. [2023-11-17 12:27:19,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:19,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:19,847 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:19,847 INFO L175 Difference]: Start difference. First operand has 212 places, 816 transitions, 14786 flow. Second operand 8 states and 111 transitions. [2023-11-17 12:27:19,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 872 transitions, 17220 flow [2023-11-17 12:27:20,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 872 transitions, 16963 flow, removed 55 selfloop flow, removed 3 redundant places. [2023-11-17 12:27:20,524 INFO L231 Difference]: Finished difference. Result has 218 places, 822 transitions, 15003 flow [2023-11-17 12:27:20,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=14535, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15003, PETRI_PLACES=218, PETRI_TRANSITIONS=822} [2023-11-17 12:27:20,524 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 188 predicate places. [2023-11-17 12:27:20,525 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 822 transitions, 15003 flow [2023-11-17 12:27:20,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 12 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:20,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:20,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:20,529 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 12:27:20,725 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,SelfDestructingSolverStorable25 [2023-11-17 12:27:20,725 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:27:20,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:20,725 INFO L85 PathProgramCache]: Analyzing trace with hash -469338601, now seen corresponding path program 7 times [2023-11-17 12:27:20,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:20,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687209834] [2023-11-17 12:27:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:20,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:27:21,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:21,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687209834] [2023-11-17 12:27:21,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687209834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:21,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704781908] [2023-11-17 12:27:21,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:27:21,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:21,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:21,125 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 12:27:21,126 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 12:27:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:21,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:27:21,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:21,324 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 15 treesize of output 7 [2023-11-17 12:27:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:21,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:21,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:27:21,395 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 24 treesize of output 21 [2023-11-17 12:27:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:21,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704781908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:21,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:21,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2023-11-17 12:27:21,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187764925] [2023-11-17 12:27:21,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:21,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:27:21,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:21,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:27:21,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:27:21,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:27:21,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 822 transitions, 15003 flow. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:21,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:21,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:27:21,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:23,699 INFO L124 PetriNetUnfolderBase]: 6027/8771 cut-off events. [2023-11-17 12:27:23,699 INFO L125 PetriNetUnfolderBase]: For 119170/119170 co-relation queries the response was YES. [2023-11-17 12:27:23,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68719 conditions, 8771 events. 6027/8771 cut-off events. For 119170/119170 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 46965 event pairs, 1072 based on Foata normal form. 1/8772 useless extension candidates. Maximal degree in co-relation 68224. Up to 7887 conditions per place. [2023-11-17 12:27:23,765 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 725 selfloop transitions, 193 changer transitions 2/920 dead transitions. [2023-11-17 12:27:23,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 920 transitions, 17922 flow [2023-11-17 12:27:23,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:27:23,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:27:23,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 180 transitions. [2023-11-17 12:27:23,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-17 12:27:23,766 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 180 transitions. [2023-11-17 12:27:23,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 180 transitions. [2023-11-17 12:27:23,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:23,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 180 transitions. [2023-11-17 12:27:23,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 12.0) internal successors, (180), 15 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:23,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 30.0) internal successors, (480), 16 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:23,767 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 30.0) internal successors, (480), 16 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:23,767 INFO L175 Difference]: Start difference. First operand has 218 places, 822 transitions, 15003 flow. Second operand 15 states and 180 transitions. [2023-11-17 12:27:23,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 920 transitions, 17922 flow [2023-11-17 12:27:24,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 920 transitions, 17536 flow, removed 52 selfloop flow, removed 5 redundant places. [2023-11-17 12:27:24,325 INFO L231 Difference]: Finished difference. Result has 230 places, 844 transitions, 15469 flow [2023-11-17 12:27:24,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=14633, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=15469, PETRI_PLACES=230, PETRI_TRANSITIONS=844} [2023-11-17 12:27:24,326 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 200 predicate places. [2023-11-17 12:27:24,326 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 844 transitions, 15469 flow [2023-11-17 12:27:24,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:24,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:24,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:24,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-17 12:27:24,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:24,531 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:27:24,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:24,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1972341609, now seen corresponding path program 8 times [2023-11-17 12:27:24,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:24,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634546655] [2023-11-17 12:27:24,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:24,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:24,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:24,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634546655] [2023-11-17 12:27:24,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634546655] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:24,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593165021] [2023-11-17 12:27:24,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:27:24,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:24,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:24,775 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 12:27:24,776 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 12:27:24,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:27:24,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:24,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:27:24,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:24,991 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 15 treesize of output 7 [2023-11-17 12:27:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:25,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:25,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:27:25,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-11-17 12:27:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:25,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593165021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:25,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:25,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-17 12:27:25,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72171275] [2023-11-17 12:27:25,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:25,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:27:25,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:25,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:27:25,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:27:25,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:27:25,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 844 transitions, 15469 flow. Second operand has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 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 12:27:25,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:25,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:27:25,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:27,063 INFO L124 PetriNetUnfolderBase]: 6071/8844 cut-off events. [2023-11-17 12:27:27,063 INFO L125 PetriNetUnfolderBase]: For 119234/119234 co-relation queries the response was YES. [2023-11-17 12:27:27,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69311 conditions, 8844 events. 6071/8844 cut-off events. For 119234/119234 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 47481 event pairs, 1111 based on Foata normal form. 1/8845 useless extension candidates. Maximal degree in co-relation 68810. Up to 8129 conditions per place. [2023-11-17 12:27:27,137 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 725 selfloop transitions, 170 changer transitions 1/896 dead transitions. [2023-11-17 12:27:27,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 896 transitions, 17819 flow [2023-11-17 12:27:27,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:27:27,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:27:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2023-11-17 12:27:27,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2023-11-17 12:27:27,138 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 128 transitions. [2023-11-17 12:27:27,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 128 transitions. [2023-11-17 12:27:27,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:27,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 128 transitions. [2023-11-17 12:27:27,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:27,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 30.0) internal successors, (360), 12 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:27,139 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 30.0) internal successors, (360), 12 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:27,139 INFO L175 Difference]: Start difference. First operand has 230 places, 844 transitions, 15469 flow. Second operand 11 states and 128 transitions. [2023-11-17 12:27:27,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 896 transitions, 17819 flow [2023-11-17 12:27:27,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 896 transitions, 17383 flow, removed 61 selfloop flow, removed 9 redundant places. [2023-11-17 12:27:27,774 INFO L231 Difference]: Finished difference. Result has 233 places, 851 transitions, 15533 flow [2023-11-17 12:27:27,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=15045, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15533, PETRI_PLACES=233, PETRI_TRANSITIONS=851} [2023-11-17 12:27:27,775 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2023-11-17 12:27:27,775 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 851 transitions, 15533 flow [2023-11-17 12:27:27,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 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 12:27:27,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:27,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:27,783 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 12:27:27,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 12:27:27,981 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:27:27,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:27,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2009894133, now seen corresponding path program 9 times [2023-11-17 12:27:27,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:27,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014347033] [2023-11-17 12:27:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:27,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:27:28,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:28,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014347033] [2023-11-17 12:27:28,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014347033] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:28,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063407156] [2023-11-17 12:27:28,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:27:28,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:28,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:28,371 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 12:27:28,373 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 12:27:28,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:27:28,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:28,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:27:28,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:28,623 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 15 treesize of output 7 [2023-11-17 12:27:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:28,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:28,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:27:28,720 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 24 treesize of output 21 [2023-11-17 12:27:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:29,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063407156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:29,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:29,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-11-17 12:27:29,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385103486] [2023-11-17 12:27:29,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:29,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:27:29,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:29,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:27:29,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:27:29,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:27:29,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 851 transitions, 15533 flow. Second operand has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:29,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:29,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:27:29,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:32,021 INFO L124 PetriNetUnfolderBase]: 6735/9810 cut-off events. [2023-11-17 12:27:32,021 INFO L125 PetriNetUnfolderBase]: For 141026/141026 co-relation queries the response was YES. [2023-11-17 12:27:32,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76934 conditions, 9810 events. 6735/9810 cut-off events. For 141026/141026 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 53500 event pairs, 1298 based on Foata normal form. 4/9814 useless extension candidates. Maximal degree in co-relation 76428. Up to 8481 conditions per place. [2023-11-17 12:27:32,098 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 796 selfloop transitions, 336 changer transitions 10/1142 dead transitions. [2023-11-17 12:27:32,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 1142 transitions, 21560 flow [2023-11-17 12:27:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-17 12:27:32,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-17 12:27:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 450 transitions. [2023-11-17 12:27:32,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2023-11-17 12:27:32,100 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 450 transitions. [2023-11-17 12:27:32,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 450 transitions. [2023-11-17 12:27:32,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:32,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 450 transitions. [2023-11-17 12:27:32,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 11.538461538461538) internal successors, (450), 39 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:32,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 30.0) internal successors, (1200), 40 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:32,102 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 30.0) internal successors, (1200), 40 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:32,102 INFO L175 Difference]: Start difference. First operand has 233 places, 851 transitions, 15533 flow. Second operand 39 states and 450 transitions. [2023-11-17 12:27:32,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 1142 transitions, 21560 flow [2023-11-17 12:27:32,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 1142 transitions, 21163 flow, removed 42 selfloop flow, removed 6 redundant places. [2023-11-17 12:27:32,762 INFO L231 Difference]: Finished difference. Result has 279 places, 995 transitions, 18580 flow [2023-11-17 12:27:32,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=15177, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=18580, PETRI_PLACES=279, PETRI_TRANSITIONS=995} [2023-11-17 12:27:32,763 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 249 predicate places. [2023-11-17 12:27:32,763 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 995 transitions, 18580 flow [2023-11-17 12:27:32,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:32,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:32,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:32,777 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 12:27:32,969 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,SelfDestructingSolverStorable28 [2023-11-17 12:27:32,970 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:27:32,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:32,970 INFO L85 PathProgramCache]: Analyzing trace with hash -837242741, now seen corresponding path program 10 times [2023-11-17 12:27:32,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:32,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820695943] [2023-11-17 12:27:32,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:32,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:27:33,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:33,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820695943] [2023-11-17 12:27:33,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820695943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:33,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799269925] [2023-11-17 12:27:33,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:27:33,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:33,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:33,413 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 12:27:33,417 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 12:27:33,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:27:33,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:33,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:27:33,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:33,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:27:33,687 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 17 treesize of output 15 [2023-11-17 12:27:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:33,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:33,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:27:33,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-11-17 12:27:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:34,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799269925] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:34,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:34,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 25 [2023-11-17 12:27:34,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282647110] [2023-11-17 12:27:34,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:34,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 12:27:34,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:34,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 12:27:34,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2023-11-17 12:27:34,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:27:34,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 995 transitions, 18580 flow. Second operand has 27 states, 27 states have (on average 6.481481481481482) internal successors, (175), 27 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:34,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:34,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:27:34,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:37,062 INFO L124 PetriNetUnfolderBase]: 7014/10226 cut-off events. [2023-11-17 12:27:37,062 INFO L125 PetriNetUnfolderBase]: For 169904/169904 co-relation queries the response was YES. [2023-11-17 12:27:37,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83185 conditions, 10226 events. 7014/10226 cut-off events. For 169904/169904 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 56301 event pairs, 1244 based on Foata normal form. 1/10227 useless extension candidates. Maximal degree in co-relation 82597. Up to 9220 conditions per place. [2023-11-17 12:27:37,156 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 868 selfloop transitions, 263 changer transitions 5/1136 dead transitions. [2023-11-17 12:27:37,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 1136 transitions, 22637 flow [2023-11-17 12:27:37,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:27:37,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:27:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 259 transitions. [2023-11-17 12:27:37,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597222222222222 [2023-11-17 12:27:37,157 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 259 transitions. [2023-11-17 12:27:37,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 259 transitions. [2023-11-17 12:27:37,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:37,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 259 transitions. [2023-11-17 12:27:37,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 10.791666666666666) internal successors, (259), 24 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:37,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 30.0) internal successors, (750), 25 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:37,159 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 30.0) internal successors, (750), 25 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:37,159 INFO L175 Difference]: Start difference. First operand has 279 places, 995 transitions, 18580 flow. Second operand 24 states and 259 transitions. [2023-11-17 12:27:37,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 1136 transitions, 22637 flow [2023-11-17 12:27:38,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1136 transitions, 21343 flow, removed 550 selfloop flow, removed 7 redundant places. [2023-11-17 12:27:38,041 INFO L231 Difference]: Finished difference. Result has 301 places, 1044 transitions, 18987 flow [2023-11-17 12:27:38,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=17419, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=995, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=18987, PETRI_PLACES=301, PETRI_TRANSITIONS=1044} [2023-11-17 12:27:38,042 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 271 predicate places. [2023-11-17 12:27:38,042 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 1044 transitions, 18987 flow [2023-11-17 12:27:38,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.481481481481482) internal successors, (175), 27 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:38,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:38,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:38,048 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 12:27:38,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:38,248 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:27:38,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:38,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1549855883, now seen corresponding path program 11 times [2023-11-17 12:27:38,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:38,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996433215] [2023-11-17 12:27:38,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:38,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:38,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:38,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996433215] [2023-11-17 12:27:38,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996433215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:38,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469947702] [2023-11-17 12:27:38,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:27:38,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:38,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:38,507 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 12:27:38,507 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 12:27:38,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:27:38,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:38,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 12:27:38,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:38,803 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 15 treesize of output 7 [2023-11-17 12:27:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:27:38,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:38,853 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:27:38,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-11-17 12:27:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:27:39,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469947702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:39,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:39,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-11-17 12:27:39,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836444883] [2023-11-17 12:27:39,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:39,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:27:39,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:39,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:27:39,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:27:39,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:27:39,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 1044 transitions, 18987 flow. Second operand has 22 states, 22 states have (on average 6.7272727272727275) internal successors, (148), 22 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 12:27:39,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:39,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:27:39,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:42,817 INFO L124 PetriNetUnfolderBase]: 8111/11837 cut-off events. [2023-11-17 12:27:42,817 INFO L125 PetriNetUnfolderBase]: For 197741/197741 co-relation queries the response was YES. [2023-11-17 12:27:42,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94844 conditions, 11837 events. 8111/11837 cut-off events. For 197741/197741 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 66854 event pairs, 1328 based on Foata normal form. 4/11841 useless extension candidates. Maximal degree in co-relation 94313. Up to 9914 conditions per place. [2023-11-17 12:27:42,922 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 903 selfloop transitions, 399 changer transitions 5/1307 dead transitions. [2023-11-17 12:27:42,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1307 transitions, 25153 flow [2023-11-17 12:27:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 12:27:42,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 12:27:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 382 transitions. [2023-11-17 12:27:42,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37450980392156863 [2023-11-17 12:27:42,923 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 382 transitions. [2023-11-17 12:27:42,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 382 transitions. [2023-11-17 12:27:42,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:42,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 382 transitions. [2023-11-17 12:27:42,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 11.235294117647058) internal successors, (382), 34 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:42,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 30.0) internal successors, (1050), 35 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:42,926 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 30.0) internal successors, (1050), 35 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:42,926 INFO L175 Difference]: Start difference. First operand has 301 places, 1044 transitions, 18987 flow. Second operand 34 states and 382 transitions. [2023-11-17 12:27:42,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1307 transitions, 25153 flow [2023-11-17 12:27:43,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1307 transitions, 24188 flow, removed 334 selfloop flow, removed 9 redundant places. [2023-11-17 12:27:44,007 INFO L231 Difference]: Finished difference. Result has 335 places, 1168 transitions, 21261 flow [2023-11-17 12:27:44,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=18296, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1044, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=21261, PETRI_PLACES=335, PETRI_TRANSITIONS=1168} [2023-11-17 12:27:44,008 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 305 predicate places. [2023-11-17 12:27:44,008 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 1168 transitions, 21261 flow [2023-11-17 12:27:44,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.7272727272727275) internal successors, (148), 22 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 12:27:44,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:44,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:44,015 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 12:27:44,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:44,213 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:27:44,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash -927437296, now seen corresponding path program 10 times [2023-11-17 12:27:44,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:44,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225387032] [2023-11-17 12:27:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:44,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:44,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:44,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225387032] [2023-11-17 12:27:44,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225387032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:44,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775442225] [2023-11-17 12:27:44,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:27:44,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:44,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:44,442 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 12:27:44,442 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 12:27:44,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:27:44,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:44,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 12:27:44,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:44,580 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 12:27:44,601 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 12:27:44,630 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 12:27:44,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:27:44,732 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 12:27:44,739 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 15 treesize of output 7 [2023-11-17 12:27:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:27:44,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:44,826 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_985 (Array Int Int))) (= (mod (+ c_~sum1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_985) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4)))) 4294967296) (mod (+ c_~sum3~0 c_~sum2~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_thread2Thread1of1ForFork2_~i~1 4)))) 4294967296))) is different from false [2023-11-17 12:27:44,830 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_985 (Array Int Int))) (= (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_985) c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296) (mod (+ c_~sum3~0 c_~sum2~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_thread2Thread1of1ForFork2_~i~1 4)))) 4294967296))) is different from false [2023-11-17 12:27:44,858 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_985 (Array Int Int)) (v_ArrVal_984 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_984))) (= (mod (+ c_~sum1~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_985) c_~A~0.base) c_~A~0.offset)) 4294967296) (mod (+ c_~sum3~0 c_~sum2~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) 4294967296)))) is different from false [2023-11-17 12:27:44,905 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:27:44,905 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 59 treesize of output 48 [2023-11-17 12:27:44,908 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 3414 treesize of output 3222 [2023-11-17 12:27:44,915 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 93 treesize of output 87 [2023-11-17 12:27:44,917 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 186 treesize of output 178 [2023-11-17 12:27:44,922 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 94 treesize of output 82 [2023-11-17 12:27:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-17 12:27:46,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775442225] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:46,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:46,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-11-17 12:27:46,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373913775] [2023-11-17 12:27:46,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:46,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:27:46,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:46,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:27:46,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=377, Unknown=19, NotChecked=132, Total=650 [2023-11-17 12:27:46,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:27:46,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 1168 transitions, 21261 flow. Second operand has 26 states, 26 states have (on average 6.653846153846154) internal successors, (173), 26 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 12:27:46,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:46,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:27:46,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:46,691 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_985 (Array Int Int))) (= (mod (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~sum3~0 c_~sum2~0) 4294967296) (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_985) c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296))) (= c_~sum3~0 0) (= c_~sum1~0 c_~sum2~0)) is different from false [2023-11-17 12:27:49,694 INFO L124 PetriNetUnfolderBase]: 8567/12508 cut-off events. [2023-11-17 12:27:49,695 INFO L125 PetriNetUnfolderBase]: For 219909/219909 co-relation queries the response was YES. [2023-11-17 12:27:49,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102640 conditions, 12508 events. 8567/12508 cut-off events. For 219909/219909 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 71421 event pairs, 1729 based on Foata normal form. 1/12509 useless extension candidates. Maximal degree in co-relation 102120. Up to 11389 conditions per place. [2023-11-17 12:27:49,827 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 1005 selfloop transitions, 258 changer transitions 1/1264 dead transitions. [2023-11-17 12:27:49,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 1264 transitions, 25103 flow [2023-11-17 12:27:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:27:49,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:27:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2023-11-17 12:27:49,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-17 12:27:49,828 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 130 transitions. [2023-11-17 12:27:49,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 130 transitions. [2023-11-17 12:27:49,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:49,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 130 transitions. [2023-11-17 12:27:49,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:49,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:27:49,829 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:27:49,829 INFO L175 Difference]: Start difference. First operand has 335 places, 1168 transitions, 21261 flow. Second operand 10 states and 130 transitions. [2023-11-17 12:27:49,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 1264 transitions, 25103 flow [2023-11-17 12:27:51,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1264 transitions, 24273 flow, removed 266 selfloop flow, removed 13 redundant places. [2023-11-17 12:27:51,211 INFO L231 Difference]: Finished difference. Result has 334 places, 1218 transitions, 21951 flow [2023-11-17 12:27:51,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=20484, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=21951, PETRI_PLACES=334, PETRI_TRANSITIONS=1218} [2023-11-17 12:27:51,212 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 304 predicate places. [2023-11-17 12:27:51,212 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 1218 transitions, 21951 flow [2023-11-17 12:27:51,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.653846153846154) internal successors, (173), 26 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 12:27:51,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:51,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:51,217 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 12:27:51,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:51,417 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:27:51,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:51,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2047372362, now seen corresponding path program 11 times [2023-11-17 12:27:51,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:51,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170501224] [2023-11-17 12:27:51,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:51,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:51,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:51,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170501224] [2023-11-17 12:27:51,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170501224] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:51,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321030019] [2023-11-17 12:27:51,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:27:51,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:51,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:51,658 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 12:27:51,659 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 12:27:51,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:27:51,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:51,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 12:27:51,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:51,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2023-11-17 12:27:51,828 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 12:27:51,834 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 15 treesize of output 7 [2023-11-17 12:27:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:51,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:51,898 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1021 (Array Int Int))) (= (mod (+ c_~sum3~0 c_~sum2~0) 4294967296) (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1021) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4))) c_~sum1~0) 4294967296))) is different from false [2023-11-17 12:27:51,904 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:27:51,904 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 64 treesize of output 48 [2023-11-17 12:27:51,907 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 22 treesize of output 16 [2023-11-17 12:27:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:52,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321030019] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:52,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:52,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:27:52,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070849380] [2023-11-17 12:27:52,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:52,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:27:52,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:52,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:27:52,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=178, Unknown=1, NotChecked=28, Total=272 [2023-11-17 12:27:52,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:27:52,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 1218 transitions, 21951 flow. Second operand has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 17 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:52,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:52,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:27:52,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:55,460 INFO L124 PetriNetUnfolderBase]: 8599/12567 cut-off events. [2023-11-17 12:27:55,460 INFO L125 PetriNetUnfolderBase]: For 219795/219795 co-relation queries the response was YES. [2023-11-17 12:27:55,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105574 conditions, 12567 events. 8599/12567 cut-off events. For 219795/219795 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 72016 event pairs, 1731 based on Foata normal form. 1/12568 useless extension candidates. Maximal degree in co-relation 105041. Up to 11200 conditions per place. [2023-11-17 12:27:55,588 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 1003 selfloop transitions, 263 changer transitions 1/1267 dead transitions. [2023-11-17 12:27:55,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1267 transitions, 25144 flow [2023-11-17 12:27:55,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:27:55,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:27:55,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2023-11-17 12:27:55,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2023-11-17 12:27:55,589 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 111 transitions. [2023-11-17 12:27:55,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 111 transitions. [2023-11-17 12:27:55,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:55,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 111 transitions. [2023-11-17 12:27:55,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:55,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:55,590 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:55,590 INFO L175 Difference]: Start difference. First operand has 334 places, 1218 transitions, 21951 flow. Second operand 8 states and 111 transitions. [2023-11-17 12:27:55,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1267 transitions, 25144 flow [2023-11-17 12:27:56,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1267 transitions, 24616 flow, removed 150 selfloop flow, removed 5 redundant places. [2023-11-17 12:27:56,999 INFO L231 Difference]: Finished difference. Result has 337 places, 1221 transitions, 22143 flow [2023-11-17 12:27:56,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=21423, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=955, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=22143, PETRI_PLACES=337, PETRI_TRANSITIONS=1221} [2023-11-17 12:27:57,000 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 307 predicate places. [2023-11-17 12:27:57,000 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 1221 transitions, 22143 flow [2023-11-17 12:27:57,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 17 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:57,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:57,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:57,004 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 12:27:57,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:57,200 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:27:57,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:57,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1868975864, now seen corresponding path program 12 times [2023-11-17 12:27:57,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:57,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101688058] [2023-11-17 12:27:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:57,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:57,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:57,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101688058] [2023-11-17 12:27:57,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101688058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:57,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794910834] [2023-11-17 12:27:57,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:27:57,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:57,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:57,485 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 12:27:57,508 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 12:27:57,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:27:57,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:57,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:27:57,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:57,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:27:57,724 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 12:27:57,742 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 15 treesize of output 7 [2023-11-17 12:27:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:27:57,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:57,834 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1054 (Array Int Int))) (= (mod (+ c_~sum1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1054) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4)))) 4294967296) (mod (+ c_~sum3~0 c_~sum2~0) 4294967296))) is different from false [2023-11-17 12:27:57,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:27:57,861 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 56 treesize of output 44 [2023-11-17 12:27:57,864 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 18 treesize of output 16 [2023-11-17 12:27:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-11-17 12:27:58,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794910834] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:58,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:58,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-17 12:27:58,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256413627] [2023-11-17 12:27:58,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:58,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:27:58,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:58,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:27:58,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=299, Unknown=2, NotChecked=36, Total=420 [2023-11-17 12:27:58,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:27:58,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 1221 transitions, 22143 flow. Second operand has 21 states, 21 states have (on average 6.714285714285714) internal successors, (141), 21 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:58,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:58,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:27:58,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:01,690 INFO L124 PetriNetUnfolderBase]: 8697/12712 cut-off events. [2023-11-17 12:28:01,690 INFO L125 PetriNetUnfolderBase]: For 222055/222055 co-relation queries the response was YES. [2023-11-17 12:28:01,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107045 conditions, 12712 events. 8697/12712 cut-off events. For 222055/222055 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 73056 event pairs, 1612 based on Foata normal form. 1/12713 useless extension candidates. Maximal degree in co-relation 106507. Up to 11424 conditions per place. [2023-11-17 12:28:01,824 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 1008 selfloop transitions, 266 changer transitions 1/1275 dead transitions. [2023-11-17 12:28:01,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 1275 transitions, 25455 flow [2023-11-17 12:28:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:28:01,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:28:01,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2023-11-17 12:28:01,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-11-17 12:28:01,825 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 112 transitions. [2023-11-17 12:28:01,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 112 transitions. [2023-11-17 12:28:01,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:01,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 112 transitions. [2023-11-17 12:28:01,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:01,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:01,826 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:01,826 INFO L175 Difference]: Start difference. First operand has 337 places, 1221 transitions, 22143 flow. Second operand 8 states and 112 transitions. [2023-11-17 12:28:01,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 1275 transitions, 25455 flow [2023-11-17 12:28:03,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1275 transitions, 24911 flow, removed 42 selfloop flow, removed 6 redundant places. [2023-11-17 12:28:03,144 INFO L231 Difference]: Finished difference. Result has 340 places, 1231 transitions, 22508 flow [2023-11-17 12:28:03,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=21601, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=958, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=22508, PETRI_PLACES=340, PETRI_TRANSITIONS=1231} [2023-11-17 12:28:03,145 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 310 predicate places. [2023-11-17 12:28:03,145 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1231 transitions, 22508 flow [2023-11-17 12:28:03,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.714285714285714) internal successors, (141), 21 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:03,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:03,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:03,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-17 12:28:03,346 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,SelfDestructingSolverStorable33 [2023-11-17 12:28:03,346 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:28:03,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:03,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1605997068, now seen corresponding path program 13 times [2023-11-17 12:28:03,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:03,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427404443] [2023-11-17 12:28:03,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:03,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:03,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:03,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427404443] [2023-11-17 12:28:03,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427404443] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:03,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463292433] [2023-11-17 12:28:03,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:28:03,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:03,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:03,580 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 12:28:03,580 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 12:28:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:03,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 12:28:03,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:03,715 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 12:28:03,744 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 12:28:03,767 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 12:28:03,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:28:03,859 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 12:28:03,888 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 15 treesize of output 7 [2023-11-17 12:28:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:03,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:04,005 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1091 (Array Int Int))) (= (mod (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4))) c_~sum1~0) 4294967296) (mod (+ c_~sum3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1091) c_~A~0.base) (+ c_~A~0.offset (* c_thread2Thread1of1ForFork2_~i~1 4))) c_~sum2~0) 4294967296))) is different from false [2023-11-17 12:28:04,035 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1091 (Array Int Int))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1091) c_~A~0.base) c_~A~0.offset)) 4294967296) (mod (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296))) is different from false [2023-11-17 12:28:04,077 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1091 (Array Int Int)) (v_ArrVal_1090 (Array Int Int)) (v_ArrVal_1089 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1089) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1090))) (= (mod (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1091) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|) c_~sum3~0 c_~sum2~0) 4294967296) (mod (+ c_~sum1~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|)) 4294967296)))) is different from false [2023-11-17 12:28:04,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:28:04,083 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 48 [2023-11-17 12:28:04,086 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 3414 treesize of output 3222 [2023-11-17 12:28:04,090 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 192 treesize of output 184 [2023-11-17 12:28:04,094 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 89 treesize of output 83 [2023-11-17 12:28:04,099 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 94 treesize of output 82 [2023-11-17 12:28:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-17 12:28:06,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463292433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:06,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:06,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2023-11-17 12:28:06,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071370823] [2023-11-17 12:28:06,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:06,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:28:06,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:06,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:28:06,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=347, Unknown=19, NotChecked=126, Total=600 [2023-11-17 12:28:06,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:28:06,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1231 transitions, 22508 flow. Second operand has 25 states, 25 states have (on average 6.24) internal successors, (156), 25 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:06,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:06,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:28:06,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:06,719 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (div c_~sum2~0 4294967296)) (.cse1 (div c_~sum1~0 4294967296))) (and (<= .cse0 .cse1) (forall ((v_ArrVal_1091 (Array Int Int)) (v_ArrVal_1090 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1090))) (= (mod (+ c_~sum1~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)) 4294967296) (mod (+ c_~sum3~0 (select (select (store .cse2 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1091) c_~A~0.base) c_~A~0.offset) c_~sum2~0) 4294967296)))) (= c_~sum3~0 0) (= (+ (* .cse0 4294967296) c_~sum1~0) (+ (* 4294967296 .cse1) c_~sum2~0)) (<= c_~sum1~0 c_~sum2~0))) is different from false [2023-11-17 12:28:09,973 INFO L124 PetriNetUnfolderBase]: 9001/13145 cut-off events. [2023-11-17 12:28:09,973 INFO L125 PetriNetUnfolderBase]: For 240348/240348 co-relation queries the response was YES. [2023-11-17 12:28:10,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111269 conditions, 13145 events. 9001/13145 cut-off events. For 240348/240348 co-relation queries the response was YES. Maximal size of possible extension queue 679. Compared 75809 event pairs, 1901 based on Foata normal form. 1/13146 useless extension candidates. Maximal degree in co-relation 110729. Up to 12127 conditions per place. [2023-11-17 12:28:10,108 INFO L140 encePairwiseOnDemand]: 12/30 looper letters, 1044 selfloop transitions, 284 changer transitions 1/1329 dead transitions. [2023-11-17 12:28:10,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1329 transitions, 26604 flow [2023-11-17 12:28:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:28:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:28:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2023-11-17 12:28:10,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-11-17 12:28:10,110 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 135 transitions. [2023-11-17 12:28:10,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 135 transitions. [2023-11-17 12:28:10,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:10,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 135 transitions. [2023-11-17 12:28:10,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:10,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:28:10,110 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:28:10,110 INFO L175 Difference]: Start difference. First operand has 340 places, 1231 transitions, 22508 flow. Second operand 10 states and 135 transitions. [2023-11-17 12:28:10,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1329 transitions, 26604 flow [2023-11-17 12:28:11,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1329 transitions, 26047 flow, removed 88 selfloop flow, removed 4 redundant places. [2023-11-17 12:28:11,545 INFO L231 Difference]: Finished difference. Result has 348 places, 1267 transitions, 23452 flow [2023-11-17 12:28:11,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=21967, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=955, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23452, PETRI_PLACES=348, PETRI_TRANSITIONS=1267} [2023-11-17 12:28:11,546 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 318 predicate places. [2023-11-17 12:28:11,546 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 1267 transitions, 23452 flow [2023-11-17 12:28:11,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.24) internal successors, (156), 25 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:11,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:11,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:11,552 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 12:28:11,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:11,747 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:28:11,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:11,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1527288394, now seen corresponding path program 14 times [2023-11-17 12:28:11,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:11,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165564049] [2023-11-17 12:28:11,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:11,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:12,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:12,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165564049] [2023-11-17 12:28:12,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165564049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:12,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649377927] [2023-11-17 12:28:12,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:28:12,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:12,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:12,010 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 12:28:12,011 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 12:28:12,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:28:12,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:12,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:28:12,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:12,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:28:12,256 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 12:28:12,261 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 15 treesize of output 7 [2023-11-17 12:28:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:12,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:12,328 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1124 (Array Int Int))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1124) c_~A~0.base) (+ c_~A~0.offset (* c_thread2Thread1of1ForFork2_~i~1 4)))) 4294967296) (mod c_~sum1~0 4294967296))) is different from false [2023-11-17 12:28:12,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:28:12,335 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 64 treesize of output 48 [2023-11-17 12:28:12,338 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 22 treesize of output 16 [2023-11-17 12:28:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:12,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649377927] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:12,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:12,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-17 12:28:12,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726911100] [2023-11-17 12:28:12,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:12,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:28:12,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:12,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:28:12,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=317, Unknown=1, NotChecked=38, Total=462 [2023-11-17 12:28:12,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:28:12,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 1267 transitions, 23452 flow. Second operand has 22 states, 22 states have (on average 7.136363636363637) internal successors, (157), 22 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:12,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:12,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:28:12,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:16,318 INFO L124 PetriNetUnfolderBase]: 9091/13278 cut-off events. [2023-11-17 12:28:16,319 INFO L125 PetriNetUnfolderBase]: For 255137/255137 co-relation queries the response was YES. [2023-11-17 12:28:16,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117337 conditions, 13278 events. 9091/13278 cut-off events. For 255137/255137 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 76770 event pairs, 1922 based on Foata normal form. 1/13279 useless extension candidates. Maximal degree in co-relation 116778. Up to 12056 conditions per place. [2023-11-17 12:28:16,450 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 1054 selfloop transitions, 278 changer transitions 1/1333 dead transitions. [2023-11-17 12:28:16,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1333 transitions, 27060 flow [2023-11-17 12:28:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:28:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:28:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2023-11-17 12:28:16,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-11-17 12:28:16,451 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 114 transitions. [2023-11-17 12:28:16,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 114 transitions. [2023-11-17 12:28:16,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:16,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 114 transitions. [2023-11-17 12:28:16,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.25) internal successors, (114), 8 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 12:28:16,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:16,452 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:16,452 INFO L175 Difference]: Start difference. First operand has 348 places, 1267 transitions, 23452 flow. Second operand 8 states and 114 transitions. [2023-11-17 12:28:16,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1333 transitions, 27060 flow [2023-11-17 12:28:17,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 1333 transitions, 26370 flow, removed 231 selfloop flow, removed 5 redundant places. [2023-11-17 12:28:17,982 INFO L231 Difference]: Finished difference. Result has 351 places, 1271 transitions, 23550 flow [2023-11-17 12:28:17,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=22762, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=989, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23550, PETRI_PLACES=351, PETRI_TRANSITIONS=1271} [2023-11-17 12:28:17,983 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 321 predicate places. [2023-11-17 12:28:17,983 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1271 transitions, 23550 flow [2023-11-17 12:28:17,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.136363636363637) internal successors, (157), 22 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:17,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:17,983 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:17,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-17 12:28:18,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:18,184 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:28:18,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:18,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1389015291, now seen corresponding path program 12 times [2023-11-17 12:28:18,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:18,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500137608] [2023-11-17 12:28:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:18,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:18,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:18,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500137608] [2023-11-17 12:28:18,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500137608] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:18,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295960185] [2023-11-17 12:28:18,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:28:18,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:18,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:18,238 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 12:28:18,245 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 12:28:18,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:28:18,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:18,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:28:18,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:18,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:18,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295960185] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:18,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:18,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 12:28:18,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403349511] [2023-11-17 12:28:18,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:18,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:28:18,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:18,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:28:18,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:28:18,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:28:18,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1271 transitions, 23550 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:18,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:18,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:28:18,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:22,886 INFO L124 PetriNetUnfolderBase]: 10495/15748 cut-off events. [2023-11-17 12:28:22,886 INFO L125 PetriNetUnfolderBase]: For 326041/326041 co-relation queries the response was YES. [2023-11-17 12:28:22,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135744 conditions, 15748 events. 10495/15748 cut-off events. For 326041/326041 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 99218 event pairs, 2913 based on Foata normal form. 781/16529 useless extension candidates. Maximal degree in co-relation 135405. Up to 6660 conditions per place. [2023-11-17 12:28:23,048 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 1350 selfloop transitions, 128 changer transitions 10/1488 dead transitions. [2023-11-17 12:28:23,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1488 transitions, 29582 flow [2023-11-17 12:28:23,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:28:23,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:28:23,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 99 transitions. [2023-11-17 12:28:23,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2023-11-17 12:28:23,049 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 99 transitions. [2023-11-17 12:28:23,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 99 transitions. [2023-11-17 12:28:23,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:23,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 99 transitions. [2023-11-17 12:28:23,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:23,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:23,049 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:23,049 INFO L175 Difference]: Start difference. First operand has 351 places, 1271 transitions, 23550 flow. Second operand 7 states and 99 transitions. [2023-11-17 12:28:23,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1488 transitions, 29582 flow [2023-11-17 12:28:24,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1488 transitions, 28661 flow, removed 118 selfloop flow, removed 13 redundant places. [2023-11-17 12:28:24,986 INFO L231 Difference]: Finished difference. Result has 345 places, 1204 transitions, 22430 flow [2023-11-17 12:28:24,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=21543, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1054, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22430, PETRI_PLACES=345, PETRI_TRANSITIONS=1204} [2023-11-17 12:28:24,987 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 315 predicate places. [2023-11-17 12:28:24,987 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 1204 transitions, 22430 flow [2023-11-17 12:28:24,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:24,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:24,987 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:24,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-17 12:28:25,188 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,SelfDestructingSolverStorable36 [2023-11-17 12:28:25,188 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:28:25,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:25,188 INFO L85 PathProgramCache]: Analyzing trace with hash 472187478, now seen corresponding path program 13 times [2023-11-17 12:28:25,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:25,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335827498] [2023-11-17 12:28:25,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:25,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:25,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:25,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335827498] [2023-11-17 12:28:25,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335827498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:25,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097559759] [2023-11-17 12:28:25,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:28:25,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:25,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:25,252 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 12:28:25,254 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 12:28:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:25,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:28:25,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:25,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:25,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097559759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:25,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:25,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-17 12:28:25,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757530941] [2023-11-17 12:28:25,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:25,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:28:25,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:25,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:28:25,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:28:25,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:28:25,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 1204 transitions, 22430 flow. Second operand has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 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 12:28:25,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:25,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:28:25,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:29,023 INFO L124 PetriNetUnfolderBase]: 8510/12736 cut-off events. [2023-11-17 12:28:29,023 INFO L125 PetriNetUnfolderBase]: For 274232/274232 co-relation queries the response was YES. [2023-11-17 12:28:29,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114699 conditions, 12736 events. 8510/12736 cut-off events. For 274232/274232 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 77507 event pairs, 2679 based on Foata normal form. 523/13259 useless extension candidates. Maximal degree in co-relation 114227. Up to 9068 conditions per place. [2023-11-17 12:28:29,149 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 1181 selfloop transitions, 117 changer transitions 0/1298 dead transitions. [2023-11-17 12:28:29,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1298 transitions, 26266 flow [2023-11-17 12:28:29,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:28:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:28:29,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2023-11-17 12:28:29,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-11-17 12:28:29,154 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 105 transitions. [2023-11-17 12:28:29,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 105 transitions. [2023-11-17 12:28:29,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:29,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 105 transitions. [2023-11-17 12:28:29,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:29,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:29,155 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:29,155 INFO L175 Difference]: Start difference. First operand has 345 places, 1204 transitions, 22430 flow. Second operand 8 states and 105 transitions. [2023-11-17 12:28:29,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1298 transitions, 26266 flow [2023-11-17 12:28:30,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 1298 transitions, 26239 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-11-17 12:28:30,736 INFO L231 Difference]: Finished difference. Result has 349 places, 1133 transitions, 21431 flow [2023-11-17 12:28:30,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=21034, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1015, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=21431, PETRI_PLACES=349, PETRI_TRANSITIONS=1133} [2023-11-17 12:28:30,736 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 319 predicate places. [2023-11-17 12:28:30,737 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 1133 transitions, 21431 flow [2023-11-17 12:28:30,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 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 12:28:30,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:30,737 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:30,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-17 12:28:30,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-17 12:28:30,937 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:28:30,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:30,938 INFO L85 PathProgramCache]: Analyzing trace with hash -901603989, now seen corresponding path program 15 times [2023-11-17 12:28:30,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:30,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137647200] [2023-11-17 12:28:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:30,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:30,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:30,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137647200] [2023-11-17 12:28:30,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137647200] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:30,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958983781] [2023-11-17 12:28:30,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:28:30,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:30,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:30,998 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:28:31,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 12:28:31,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:28:31,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:31,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:28:31,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:31,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:31,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958983781] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:31,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:31,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-17 12:28:31,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714648055] [2023-11-17 12:28:31,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:31,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:28:31,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:31,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:28:31,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:28:31,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:28:31,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 1133 transitions, 21431 flow. Second operand has 15 states, 15 states have (on average 6.933333333333334) internal successors, (104), 15 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 12:28:31,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:31,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:28:31,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:34,462 INFO L124 PetriNetUnfolderBase]: 7783/11925 cut-off events. [2023-11-17 12:28:34,462 INFO L125 PetriNetUnfolderBase]: For 261719/261719 co-relation queries the response was YES. [2023-11-17 12:28:34,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108533 conditions, 11925 events. 7783/11925 cut-off events. For 261719/261719 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 75368 event pairs, 2030 based on Foata normal form. 561/12486 useless extension candidates. Maximal degree in co-relation 108056. Up to 4787 conditions per place. [2023-11-17 12:28:34,587 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 1048 selfloop transitions, 229 changer transitions 107/1384 dead transitions. [2023-11-17 12:28:34,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1384 transitions, 27842 flow [2023-11-17 12:28:34,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:28:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:28:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2023-11-17 12:28:34,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-17 12:28:34,588 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 100 transitions. [2023-11-17 12:28:34,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 100 transitions. [2023-11-17 12:28:34,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:34,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 100 transitions. [2023-11-17 12:28:34,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 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 12:28:34,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:34,589 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:34,589 INFO L175 Difference]: Start difference. First operand has 349 places, 1133 transitions, 21431 flow. Second operand 7 states and 100 transitions. [2023-11-17 12:28:34,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1384 transitions, 27842 flow [2023-11-17 12:28:36,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 1384 transitions, 27102 flow, removed 141 selfloop flow, removed 9 redundant places. [2023-11-17 12:28:36,217 INFO L231 Difference]: Finished difference. Result has 349 places, 1055 transitions, 20361 flow [2023-11-17 12:28:36,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=20373, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=878, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20361, PETRI_PLACES=349, PETRI_TRANSITIONS=1055} [2023-11-17 12:28:36,218 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 319 predicate places. [2023-11-17 12:28:36,218 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 1055 transitions, 20361 flow [2023-11-17 12:28:36,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.933333333333334) internal successors, (104), 15 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 12:28:36,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:36,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:36,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-17 12:28:36,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 12:28:36,421 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:28:36,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:36,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1835585576, now seen corresponding path program 1 times [2023-11-17 12:28:36,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:36,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680703711] [2023-11-17 12:28:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:36,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:36,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:36,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680703711] [2023-11-17 12:28:36,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680703711] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:36,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618530608] [2023-11-17 12:28:36,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:36,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:36,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:36,488 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:28:36,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 12:28:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:36,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:28:36,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:36,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:36,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618530608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:36,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:36,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:28:36,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496069668] [2023-11-17 12:28:36,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:36,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:28:36,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:36,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:28:36,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:28:36,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:28:36,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 1055 transitions, 20361 flow. Second operand has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 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 12:28:36,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:36,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:28:36,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:39,846 INFO L124 PetriNetUnfolderBase]: 7327/11424 cut-off events. [2023-11-17 12:28:39,847 INFO L125 PetriNetUnfolderBase]: For 267269/267269 co-relation queries the response was YES. [2023-11-17 12:28:40,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106504 conditions, 11424 events. 7327/11424 cut-off events. For 267269/267269 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 74278 event pairs, 1581 based on Foata normal form. 294/11718 useless extension candidates. Maximal degree in co-relation 105882. Up to 4709 conditions per place. [2023-11-17 12:28:40,106 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 949 selfloop transitions, 212 changer transitions 112/1273 dead transitions. [2023-11-17 12:28:40,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1273 transitions, 25808 flow [2023-11-17 12:28:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:28:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:28:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 145 transitions. [2023-11-17 12:28:40,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2023-11-17 12:28:40,107 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 145 transitions. [2023-11-17 12:28:40,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 145 transitions. [2023-11-17 12:28:40,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:40,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 145 transitions. [2023-11-17 12:28:40,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:40,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:28:40,108 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:28:40,108 INFO L175 Difference]: Start difference. First operand has 349 places, 1055 transitions, 20361 flow. Second operand 10 states and 145 transitions. [2023-11-17 12:28:40,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1273 transitions, 25808 flow [2023-11-17 12:28:41,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1273 transitions, 25705 flow, removed 48 selfloop flow, removed 3 redundant places. [2023-11-17 12:28:41,687 INFO L231 Difference]: Finished difference. Result has 359 places, 1001 transitions, 19915 flow [2023-11-17 12:28:41,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=20009, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1038, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=826, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19915, PETRI_PLACES=359, PETRI_TRANSITIONS=1001} [2023-11-17 12:28:41,688 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 329 predicate places. [2023-11-17 12:28:41,688 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 1001 transitions, 19915 flow [2023-11-17 12:28:41,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 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 12:28:41,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:41,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:41,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-17 12:28:41,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 12:28:41,892 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:28:41,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:41,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1028394190, now seen corresponding path program 2 times [2023-11-17 12:28:41,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:41,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369309286] [2023-11-17 12:28:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:41,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:41,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:41,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369309286] [2023-11-17 12:28:41,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369309286] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:41,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065524040] [2023-11-17 12:28:41,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:28:41,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:41,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:41,955 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:28:41,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 12:28:42,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:28:42,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:42,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:28:42,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:42,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:42,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065524040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:42,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:42,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-17 12:28:42,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342498491] [2023-11-17 12:28:42,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:42,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:28:42,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:42,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:28:42,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:28:42,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:28:42,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 1001 transitions, 19915 flow. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 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 12:28:42,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:42,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:28:42,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:45,171 INFO L124 PetriNetUnfolderBase]: 6703/10234 cut-off events. [2023-11-17 12:28:45,171 INFO L125 PetriNetUnfolderBase]: For 291816/291816 co-relation queries the response was YES. [2023-11-17 12:28:45,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100843 conditions, 10234 events. 6703/10234 cut-off events. For 291816/291816 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 62847 event pairs, 1657 based on Foata normal form. 236/10470 useless extension candidates. Maximal degree in co-relation 100277. Up to 3826 conditions per place. [2023-11-17 12:28:45,277 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 938 selfloop transitions, 261 changer transitions 40/1239 dead transitions. [2023-11-17 12:28:45,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1239 transitions, 25752 flow [2023-11-17 12:28:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:28:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:28:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 172 transitions. [2023-11-17 12:28:45,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441025641025641 [2023-11-17 12:28:45,278 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 172 transitions. [2023-11-17 12:28:45,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 172 transitions. [2023-11-17 12:28:45,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:45,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 172 transitions. [2023-11-17 12:28:45,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 13.23076923076923) internal successors, (172), 13 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:45,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 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 12:28:45,279 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 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 12:28:45,279 INFO L175 Difference]: Start difference. First operand has 359 places, 1001 transitions, 19915 flow. Second operand 13 states and 172 transitions. [2023-11-17 12:28:45,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1239 transitions, 25752 flow [2023-11-17 12:28:47,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1239 transitions, 24877 flow, removed 249 selfloop flow, removed 12 redundant places. [2023-11-17 12:28:47,122 INFO L231 Difference]: Finished difference. Result has 358 places, 1012 transitions, 20294 flow [2023-11-17 12:28:47,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=18849, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=976, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=20294, PETRI_PLACES=358, PETRI_TRANSITIONS=1012} [2023-11-17 12:28:47,123 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 328 predicate places. [2023-11-17 12:28:47,123 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 1012 transitions, 20294 flow [2023-11-17 12:28:47,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 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 12:28:47,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:47,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:47,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-17 12:28:47,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:47,324 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:28:47,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:47,324 INFO L85 PathProgramCache]: Analyzing trace with hash -103988414, now seen corresponding path program 3 times [2023-11-17 12:28:47,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:47,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418924162] [2023-11-17 12:28:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:47,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:47,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:47,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418924162] [2023-11-17 12:28:47,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418924162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:47,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448135897] [2023-11-17 12:28:47,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:28:47,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:47,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:47,388 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:28:47,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-17 12:28:47,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:28:47,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:47,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:28:47,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:47,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:47,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448135897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:47,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:47,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-17 12:28:47,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856026296] [2023-11-17 12:28:47,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:47,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:28:47,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:47,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:28:47,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:28:47,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:28:47,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 1012 transitions, 20294 flow. Second operand has 17 states, 17 states have (on average 6.294117647058823) internal successors, (107), 17 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 12:28:47,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:47,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:28:47,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:50,288 INFO L124 PetriNetUnfolderBase]: 6354/9855 cut-off events. [2023-11-17 12:28:50,288 INFO L125 PetriNetUnfolderBase]: For 263207/263207 co-relation queries the response was YES. [2023-11-17 12:28:50,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96019 conditions, 9855 events. 6354/9855 cut-off events. For 263207/263207 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 61538 event pairs, 1604 based on Foata normal form. 229/10084 useless extension candidates. Maximal degree in co-relation 95731. Up to 3668 conditions per place. [2023-11-17 12:28:50,390 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 903 selfloop transitions, 170 changer transitions 74/1147 dead transitions. [2023-11-17 12:28:50,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1147 transitions, 24033 flow [2023-11-17 12:28:50,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:28:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:28:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2023-11-17 12:28:50,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533333333333333 [2023-11-17 12:28:50,391 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 136 transitions. [2023-11-17 12:28:50,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 136 transitions. [2023-11-17 12:28:50,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:50,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 136 transitions. [2023-11-17 12:28:50,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:50,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:28:50,392 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:28:50,392 INFO L175 Difference]: Start difference. First operand has 358 places, 1012 transitions, 20294 flow. Second operand 10 states and 136 transitions. [2023-11-17 12:28:50,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1147 transitions, 24033 flow [2023-11-17 12:28:52,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1147 transitions, 23327 flow, removed 68 selfloop flow, removed 11 redundant places. [2023-11-17 12:28:52,027 INFO L231 Difference]: Finished difference. Result has 352 places, 929 transitions, 18119 flow [2023-11-17 12:28:52,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=18562, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=960, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18119, PETRI_PLACES=352, PETRI_TRANSITIONS=929} [2023-11-17 12:28:52,028 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 322 predicate places. [2023-11-17 12:28:52,028 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 929 transitions, 18119 flow [2023-11-17 12:28:52,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.294117647058823) internal successors, (107), 17 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 12:28:52,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:52,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:52,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-17 12:28:52,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-17 12:28:52,232 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:28:52,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:52,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2059477066, now seen corresponding path program 4 times [2023-11-17 12:28:52,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:52,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094384145] [2023-11-17 12:28:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:52,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:52,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:52,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094384145] [2023-11-17 12:28:52,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094384145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:52,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194982948] [2023-11-17 12:28:52,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:28:52,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:52,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:52,295 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:28:52,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-17 12:28:52,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:28:52,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:52,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 12:28:52,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:52,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:52,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194982948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:52,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:52,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2023-11-17 12:28:52,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798521021] [2023-11-17 12:28:52,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:52,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:28:52,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:52,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:28:52,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:28:52,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:28:52,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 929 transitions, 18119 flow. Second operand has 16 states, 16 states have (on average 6.8125) internal successors, (109), 16 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 12:28:52,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:52,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:28:52,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:55,581 INFO L124 PetriNetUnfolderBase]: 7113/10734 cut-off events. [2023-11-17 12:28:55,581 INFO L125 PetriNetUnfolderBase]: For 268469/268469 co-relation queries the response was YES. [2023-11-17 12:28:55,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102854 conditions, 10734 events. 7113/10734 cut-off events. For 268469/268469 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 64959 event pairs, 463 based on Foata normal form. 244/10978 useless extension candidates. Maximal degree in co-relation 102224. Up to 3394 conditions per place. [2023-11-17 12:28:55,693 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 863 selfloop transitions, 585 changer transitions 54/1502 dead transitions. [2023-11-17 12:28:55,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1502 transitions, 29948 flow [2023-11-17 12:28:55,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 12:28:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 12:28:55,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 445 transitions. [2023-11-17 12:28:55,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2023-11-17 12:28:55,695 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 445 transitions. [2023-11-17 12:28:55,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 445 transitions. [2023-11-17 12:28:55,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:55,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 445 transitions. [2023-11-17 12:28:55,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 11.125) internal successors, (445), 40 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:55,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 30.0) internal successors, (1230), 41 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:55,697 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 30.0) internal successors, (1230), 41 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:55,697 INFO L175 Difference]: Start difference. First operand has 352 places, 929 transitions, 18119 flow. Second operand 40 states and 445 transitions. [2023-11-17 12:28:55,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1502 transitions, 29948 flow [2023-11-17 12:28:57,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1502 transitions, 29136 flow, removed 138 selfloop flow, removed 10 redundant places. [2023-11-17 12:28:57,364 INFO L231 Difference]: Finished difference. Result has 396 places, 1116 transitions, 22730 flow [2023-11-17 12:28:57,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=17619, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=22730, PETRI_PLACES=396, PETRI_TRANSITIONS=1116} [2023-11-17 12:28:57,365 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 366 predicate places. [2023-11-17 12:28:57,365 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 1116 transitions, 22730 flow [2023-11-17 12:28:57,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.8125) internal successors, (109), 16 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 12:28:57,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:57,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:57,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-17 12:28:57,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-17 12:28:57,570 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:28:57,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash 800544736, now seen corresponding path program 5 times [2023-11-17 12:28:57,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:57,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351765500] [2023-11-17 12:28:57,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:57,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:57,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:57,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351765500] [2023-11-17 12:28:57,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351765500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:57,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713507896] [2023-11-17 12:28:57,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:28:57,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:57,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:57,634 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:28:57,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-17 12:28:57,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:28:57,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:57,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:28:57,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:57,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:57,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713507896] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:57,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:57,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-17 12:28:57,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995398812] [2023-11-17 12:28:57,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:57,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:28:57,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:57,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:28:57,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:28:57,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:28:57,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 1116 transitions, 22730 flow. Second operand has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 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 12:28:57,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:57,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:28:57,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:00,847 INFO L124 PetriNetUnfolderBase]: 6609/10051 cut-off events. [2023-11-17 12:29:00,847 INFO L125 PetriNetUnfolderBase]: For 282482/282482 co-relation queries the response was YES. [2023-11-17 12:29:00,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101794 conditions, 10051 events. 6609/10051 cut-off events. For 282482/282482 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 60966 event pairs, 1328 based on Foata normal form. 208/10259 useless extension candidates. Maximal degree in co-relation 101133. Up to 4175 conditions per place. [2023-11-17 12:29:00,964 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 1037 selfloop transitions, 143 changer transitions 60/1240 dead transitions. [2023-11-17 12:29:00,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 1240 transitions, 26896 flow [2023-11-17 12:29:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:29:00,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:29:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2023-11-17 12:29:00,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2023-11-17 12:29:00,965 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 123 transitions. [2023-11-17 12:29:00,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 123 transitions. [2023-11-17 12:29:00,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:00,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 123 transitions. [2023-11-17 12:29:00,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:00,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:00,966 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:00,966 INFO L175 Difference]: Start difference. First operand has 396 places, 1116 transitions, 22730 flow. Second operand 9 states and 123 transitions. [2023-11-17 12:29:00,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 1240 transitions, 26896 flow [2023-11-17 12:29:03,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1240 transitions, 25559 flow, removed 359 selfloop flow, removed 9 redundant places. [2023-11-17 12:29:03,230 INFO L231 Difference]: Finished difference. Result has 398 places, 1098 transitions, 21608 flow [2023-11-17 12:29:03,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=20971, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=956, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21608, PETRI_PLACES=398, PETRI_TRANSITIONS=1098} [2023-11-17 12:29:03,231 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 368 predicate places. [2023-11-17 12:29:03,231 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 1098 transitions, 21608 flow [2023-11-17 12:29:03,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 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 12:29:03,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:03,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:03,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-17 12:29:03,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-17 12:29:03,436 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:29:03,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:03,437 INFO L85 PathProgramCache]: Analyzing trace with hash 672385438, now seen corresponding path program 6 times [2023-11-17 12:29:03,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:03,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24975618] [2023-11-17 12:29:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:03,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:29:03,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:03,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24975618] [2023-11-17 12:29:03,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24975618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:03,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990860148] [2023-11-17 12:29:03,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:29:03,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:03,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:03,500 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:03,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-17 12:29:03,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:29:03,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:03,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:29:03,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:29:03,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:29:03,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990860148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:03,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:03,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-17 12:29:03,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028005308] [2023-11-17 12:29:03,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:03,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:29:03,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:03,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:29:03,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:29:03,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:29:03,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 1098 transitions, 21608 flow. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 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 12:29:03,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:03,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:29:03,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:06,528 INFO L124 PetriNetUnfolderBase]: 6282/9640 cut-off events. [2023-11-17 12:29:06,528 INFO L125 PetriNetUnfolderBase]: For 243157/243157 co-relation queries the response was YES. [2023-11-17 12:29:06,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92542 conditions, 9640 events. 6282/9640 cut-off events. For 243157/243157 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 58584 event pairs, 1193 based on Foata normal form. 244/9884 useless extension candidates. Maximal degree in co-relation 92048. Up to 4175 conditions per place. [2023-11-17 12:29:06,640 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 986 selfloop transitions, 136 changer transitions 36/1158 dead transitions. [2023-11-17 12:29:06,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1158 transitions, 23496 flow [2023-11-17 12:29:06,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:29:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:29:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2023-11-17 12:29:06,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2023-11-17 12:29:06,641 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 134 transitions. [2023-11-17 12:29:06,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 134 transitions. [2023-11-17 12:29:06,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:06,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 134 transitions. [2023-11-17 12:29:06,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:29:06,642 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:29:06,642 INFO L175 Difference]: Start difference. First operand has 398 places, 1098 transitions, 21608 flow. Second operand 10 states and 134 transitions. [2023-11-17 12:29:06,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1158 transitions, 23496 flow [2023-11-17 12:29:08,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1158 transitions, 22971 flow, removed 133 selfloop flow, removed 14 redundant places. [2023-11-17 12:29:08,090 INFO L231 Difference]: Finished difference. Result has 389 places, 1020 transitions, 19634 flow [2023-11-17 12:29:08,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=18958, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=878, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19634, PETRI_PLACES=389, PETRI_TRANSITIONS=1020} [2023-11-17 12:29:08,091 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 359 predicate places. [2023-11-17 12:29:08,091 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 1020 transitions, 19634 flow [2023-11-17 12:29:08,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 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 12:29:08,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:08,091 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:08,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:08,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:08,291 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:29:08,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:08,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1506293132, now seen corresponding path program 14 times [2023-11-17 12:29:08,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:08,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903889391] [2023-11-17 12:29:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:08,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:08,370 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 12:29:08,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:08,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903889391] [2023-11-17 12:29:08,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903889391] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:08,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873674752] [2023-11-17 12:29:08,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:29:08,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:08,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:08,481 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:08,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-17 12:29:08,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:29:08,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:08,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:29:08,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:08,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:08,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873674752] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:08,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:08,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-17 12:29:08,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694510233] [2023-11-17 12:29:08,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:08,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:29:08,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:08,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:29:08,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:29:08,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:29:08,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 1020 transitions, 19634 flow. Second operand has 19 states, 19 states have (on average 6.315789473684211) internal successors, (120), 19 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:08,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:08,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:29:08,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:11,450 INFO L124 PetriNetUnfolderBase]: 6155/9431 cut-off events. [2023-11-17 12:29:11,450 INFO L125 PetriNetUnfolderBase]: For 222130/222130 co-relation queries the response was YES. [2023-11-17 12:29:11,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91691 conditions, 9431 events. 6155/9431 cut-off events. For 222130/222130 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 57211 event pairs, 1720 based on Foata normal form. 30/9461 useless extension candidates. Maximal degree in co-relation 91468. Up to 5273 conditions per place. [2023-11-17 12:29:11,560 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 940 selfloop transitions, 164 changer transitions 0/1104 dead transitions. [2023-11-17 12:29:11,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1104 transitions, 23232 flow [2023-11-17 12:29:11,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:29:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:29:11,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2023-11-17 12:29:11,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2023-11-17 12:29:11,561 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 134 transitions. [2023-11-17 12:29:11,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 134 transitions. [2023-11-17 12:29:11,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:11,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 134 transitions. [2023-11-17 12:29:11,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:11,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:29:11,562 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:29:11,562 INFO L175 Difference]: Start difference. First operand has 389 places, 1020 transitions, 19634 flow. Second operand 10 states and 134 transitions. [2023-11-17 12:29:11,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1104 transitions, 23232 flow [2023-11-17 12:29:13,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1104 transitions, 22640 flow, removed 137 selfloop flow, removed 13 redundant places. [2023-11-17 12:29:13,030 INFO L231 Difference]: Finished difference. Result has 384 places, 1017 transitions, 19446 flow [2023-11-17 12:29:13,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=19057, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=852, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19446, PETRI_PLACES=384, PETRI_TRANSITIONS=1017} [2023-11-17 12:29:13,031 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 354 predicate places. [2023-11-17 12:29:13,031 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 1017 transitions, 19446 flow [2023-11-17 12:29:13,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.315789473684211) internal successors, (120), 19 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:13,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:13,031 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:13,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:13,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:13,236 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:29:13,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:13,236 INFO L85 PathProgramCache]: Analyzing trace with hash -762182471, now seen corresponding path program 15 times [2023-11-17 12:29:13,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:13,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159662308] [2023-11-17 12:29:13,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:13,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:29:13,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:13,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159662308] [2023-11-17 12:29:13,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159662308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:13,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923686383] [2023-11-17 12:29:13,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:29:13,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:13,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:13,300 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:13,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-17 12:29:13,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:29:13,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:13,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:29:13,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:29:13,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:29:13,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923686383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:13,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:13,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-17 12:29:13,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90258580] [2023-11-17 12:29:13,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:13,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:29:13,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:13,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:29:13,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:29:13,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:29:13,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 1017 transitions, 19446 flow. Second operand has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 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 12:29:13,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:13,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:29:13,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:15,205 INFO L124 PetriNetUnfolderBase]: 3886/5926 cut-off events. [2023-11-17 12:29:15,206 INFO L125 PetriNetUnfolderBase]: For 142900/142900 co-relation queries the response was YES. [2023-11-17 12:29:15,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60956 conditions, 5926 events. 3886/5926 cut-off events. For 142900/142900 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 33182 event pairs, 959 based on Foata normal form. 300/6226 useless extension candidates. Maximal degree in co-relation 60814. Up to 4158 conditions per place. [2023-11-17 12:29:15,264 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 561 selfloop transitions, 3 changer transitions 302/866 dead transitions. [2023-11-17 12:29:15,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 866 transitions, 18908 flow [2023-11-17 12:29:15,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:29:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:29:15,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2023-11-17 12:29:15,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2023-11-17 12:29:15,265 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 93 transitions. [2023-11-17 12:29:15,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 93 transitions. [2023-11-17 12:29:15,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:15,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 93 transitions. [2023-11-17 12:29:15,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:15,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:15,266 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:15,266 INFO L175 Difference]: Start difference. First operand has 384 places, 1017 transitions, 19446 flow. Second operand 7 states and 93 transitions. [2023-11-17 12:29:15,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 866 transitions, 18908 flow [2023-11-17 12:29:16,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 866 transitions, 18118 flow, removed 75 selfloop flow, removed 32 redundant places. [2023-11-17 12:29:16,052 INFO L231 Difference]: Finished difference. Result has 330 places, 564 transitions, 10161 flow [2023-11-17 12:29:16,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=16257, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=838, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10161, PETRI_PLACES=330, PETRI_TRANSITIONS=564} [2023-11-17 12:29:16,052 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 300 predicate places. [2023-11-17 12:29:16,053 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 564 transitions, 10161 flow [2023-11-17 12:29:16,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 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 12:29:16,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:16,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:16,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:16,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-17 12:29:16,254 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:29:16,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:16,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1813185515, now seen corresponding path program 16 times [2023-11-17 12:29:16,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:16,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732188962] [2023-11-17 12:29:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:16,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:29:16,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:16,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732188962] [2023-11-17 12:29:16,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732188962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:16,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866276794] [2023-11-17 12:29:16,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:29:16,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:16,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:16,341 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:16,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-17 12:29:16,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:29:16,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:16,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:29:16,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:16,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:16,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866276794] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:16,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:16,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-17 12:29:16,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430411322] [2023-11-17 12:29:16,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:16,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:29:16,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:16,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:29:16,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:29:16,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:29:16,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 564 transitions, 10161 flow. Second operand has 18 states, 18 states have (on average 6.388888888888889) internal successors, (115), 18 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 12:29:16,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:16,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:29:16,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:17,984 INFO L124 PetriNetUnfolderBase]: 3539/5115 cut-off events. [2023-11-17 12:29:17,985 INFO L125 PetriNetUnfolderBase]: For 134880/134880 co-relation queries the response was YES. [2023-11-17 12:29:18,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51575 conditions, 5115 events. 3539/5115 cut-off events. For 134880/134880 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 25422 event pairs, 184 based on Foata normal form. 111/5226 useless extension candidates. Maximal degree in co-relation 51458. Up to 1760 conditions per place. [2023-11-17 12:29:18,038 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 548 selfloop transitions, 595 changer transitions 0/1143 dead transitions. [2023-11-17 12:29:18,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 1143 transitions, 21516 flow [2023-11-17 12:29:18,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:29:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:29:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 378 transitions. [2023-11-17 12:29:18,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2023-11-17 12:29:18,039 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 378 transitions. [2023-11-17 12:29:18,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 378 transitions. [2023-11-17 12:29:18,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:18,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 378 transitions. [2023-11-17 12:29:18,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 10.8) internal successors, (378), 35 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 12:29:18,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 30.0) internal successors, (1080), 36 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:18,041 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 30.0) internal successors, (1080), 36 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:18,041 INFO L175 Difference]: Start difference. First operand has 330 places, 564 transitions, 10161 flow. Second operand 35 states and 378 transitions. [2023-11-17 12:29:18,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 1143 transitions, 21516 flow [2023-11-17 12:29:18,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 1143 transitions, 20217 flow, removed 311 selfloop flow, removed 26 redundant places. [2023-11-17 12:29:18,555 INFO L231 Difference]: Finished difference. Result has 295 places, 848 transitions, 15830 flow [2023-11-17 12:29:18,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=9328, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15830, PETRI_PLACES=295, PETRI_TRANSITIONS=848} [2023-11-17 12:29:18,555 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 265 predicate places. [2023-11-17 12:29:18,555 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 848 transitions, 15830 flow [2023-11-17 12:29:18,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.388888888888889) internal successors, (115), 18 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 12:29:18,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:18,556 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:18,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:18,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-17 12:29:18,756 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:29:18,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:18,756 INFO L85 PathProgramCache]: Analyzing trace with hash 177962249, now seen corresponding path program 17 times [2023-11-17 12:29:18,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:18,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382410094] [2023-11-17 12:29:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:18,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:18,832 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 12:29:18,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:18,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382410094] [2023-11-17 12:29:18,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382410094] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:18,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042623805] [2023-11-17 12:29:18,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:29:18,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:18,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:18,833 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:18,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-17 12:29:18,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:29:18,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:18,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:29:18,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:19,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:19,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042623805] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:19,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:19,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-17 12:29:19,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537044251] [2023-11-17 12:29:19,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:19,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:29:19,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:19,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:29:19,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:29:19,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:29:19,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 848 transitions, 15830 flow. Second operand has 17 states, 17 states have (on average 6.294117647058823) internal successors, (107), 17 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 12:29:19,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:19,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:29:19,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:20,622 INFO L124 PetriNetUnfolderBase]: 3602/5250 cut-off events. [2023-11-17 12:29:20,622 INFO L125 PetriNetUnfolderBase]: For 145822/145822 co-relation queries the response was YES. [2023-11-17 12:29:20,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55076 conditions, 5250 events. 3602/5250 cut-off events. For 145822/145822 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 26501 event pairs, 153 based on Foata normal form. 72/5322 useless extension candidates. Maximal degree in co-relation 54959. Up to 1784 conditions per place. [2023-11-17 12:29:20,673 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 578 selfloop transitions, 511 changer transitions 0/1089 dead transitions. [2023-11-17 12:29:20,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 1089 transitions, 21984 flow [2023-11-17 12:29:20,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:29:20,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:29:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 234 transitions. [2023-11-17 12:29:20,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2023-11-17 12:29:20,674 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 234 transitions. [2023-11-17 12:29:20,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 234 transitions. [2023-11-17 12:29:20,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:20,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 234 transitions. [2023-11-17 12:29:20,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 11.7) internal successors, (234), 20 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:20,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 30.0) internal successors, (630), 21 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:20,675 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 30.0) internal successors, (630), 21 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:20,675 INFO L175 Difference]: Start difference. First operand has 295 places, 848 transitions, 15830 flow. Second operand 20 states and 234 transitions. [2023-11-17 12:29:20,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 1089 transitions, 21984 flow [2023-11-17 12:29:21,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 1089 transitions, 20068 flow, removed 721 selfloop flow, removed 12 redundant places. [2023-11-17 12:29:21,232 INFO L231 Difference]: Finished difference. Result has 308 places, 873 transitions, 16045 flow [2023-11-17 12:29:21,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=14056, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=484, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=16045, PETRI_PLACES=308, PETRI_TRANSITIONS=873} [2023-11-17 12:29:21,233 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 278 predicate places. [2023-11-17 12:29:21,233 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 873 transitions, 16045 flow [2023-11-17 12:29:21,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.294117647058823) internal successors, (107), 17 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 12:29:21,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:21,234 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:21,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:21,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-17 12:29:21,436 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:29:21,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:21,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1952326437, now seen corresponding path program 18 times [2023-11-17 12:29:21,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:21,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359252792] [2023-11-17 12:29:21,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:21,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:21,520 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 12:29:21,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:21,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359252792] [2023-11-17 12:29:21,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359252792] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:21,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869432369] [2023-11-17 12:29:21,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:29:21,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:21,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:21,521 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:21,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-17 12:29:21,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:29:21,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:21,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:29:21,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:21,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:21,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869432369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:21,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:21,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-17 12:29:21,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388345989] [2023-11-17 12:29:21,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:21,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:29:21,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:21,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:29:21,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:29:21,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:29:21,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 873 transitions, 16045 flow. Second operand has 19 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 19 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:21,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:21,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:29:21,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:23,054 INFO L124 PetriNetUnfolderBase]: 3648/5328 cut-off events. [2023-11-17 12:29:23,054 INFO L125 PetriNetUnfolderBase]: For 127460/127460 co-relation queries the response was YES. [2023-11-17 12:29:23,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53004 conditions, 5328 events. 3648/5328 cut-off events. For 127460/127460 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 27060 event pairs, 485 based on Foata normal form. 32/5360 useless extension candidates. Maximal degree in co-relation 52886. Up to 2754 conditions per place. [2023-11-17 12:29:23,117 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 778 selfloop transitions, 296 changer transitions 0/1074 dead transitions. [2023-11-17 12:29:23,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1074 transitions, 21319 flow [2023-11-17 12:29:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:29:23,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:29:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2023-11-17 12:29:23,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3566666666666667 [2023-11-17 12:29:23,118 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 107 transitions. [2023-11-17 12:29:23,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 107 transitions. [2023-11-17 12:29:23,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:23,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 107 transitions. [2023-11-17 12:29:23,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 10.7) internal successors, (107), 10 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 12:29:23,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:29:23,118 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:29:23,118 INFO L175 Difference]: Start difference. First operand has 308 places, 873 transitions, 16045 flow. Second operand 10 states and 107 transitions. [2023-11-17 12:29:23,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1074 transitions, 21319 flow [2023-11-17 12:29:23,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 1074 transitions, 20445 flow, removed 117 selfloop flow, removed 11 redundant places. [2023-11-17 12:29:23,856 INFO L231 Difference]: Finished difference. Result has 307 places, 889 transitions, 16159 flow [2023-11-17 12:29:23,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=15272, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16159, PETRI_PLACES=307, PETRI_TRANSITIONS=889} [2023-11-17 12:29:23,857 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 277 predicate places. [2023-11-17 12:29:23,857 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 889 transitions, 16159 flow [2023-11-17 12:29:23,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 19 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:23,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:23,857 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:23,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:24,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:24,058 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:29:24,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1906374383, now seen corresponding path program 19 times [2023-11-17 12:29:24,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:24,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488361535] [2023-11-17 12:29:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:24,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:24,138 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 12:29:24,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:24,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488361535] [2023-11-17 12:29:24,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488361535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:24,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226256792] [2023-11-17 12:29:24,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:29:24,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:24,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:24,140 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:24,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-17 12:29:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:24,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:29:24,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:24,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:24,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226256792] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:24,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:24,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-11-17 12:29:24,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920568838] [2023-11-17 12:29:24,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:24,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:29:24,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:24,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:29:24,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:29:24,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:29:24,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 889 transitions, 16159 flow. Second operand has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:24,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:24,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:29:24,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:25,921 INFO L124 PetriNetUnfolderBase]: 3815/5619 cut-off events. [2023-11-17 12:29:25,921 INFO L125 PetriNetUnfolderBase]: For 137443/137443 co-relation queries the response was YES. [2023-11-17 12:29:25,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55985 conditions, 5619 events. 3815/5619 cut-off events. For 137443/137443 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 29227 event pairs, 489 based on Foata normal form. 62/5681 useless extension candidates. Maximal degree in co-relation 55867. Up to 2792 conditions per place. [2023-11-17 12:29:25,982 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 806 selfloop transitions, 420 changer transitions 0/1226 dead transitions. [2023-11-17 12:29:25,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1226 transitions, 24027 flow [2023-11-17 12:29:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:29:25,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:29:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 191 transitions. [2023-11-17 12:29:25,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39791666666666664 [2023-11-17 12:29:25,983 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 191 transitions. [2023-11-17 12:29:25,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 191 transitions. [2023-11-17 12:29:25,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:25,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 191 transitions. [2023-11-17 12:29:25,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 11.9375) internal successors, (191), 16 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 12:29:25,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 30.0) internal successors, (510), 17 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:25,984 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 30.0) internal successors, (510), 17 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:25,984 INFO L175 Difference]: Start difference. First operand has 307 places, 889 transitions, 16159 flow. Second operand 16 states and 191 transitions. [2023-11-17 12:29:25,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 1226 transitions, 24027 flow [2023-11-17 12:29:26,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1226 transitions, 23449 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-17 12:29:26,664 INFO L231 Difference]: Finished difference. Result has 319 places, 975 transitions, 18389 flow [2023-11-17 12:29:26,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=15627, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=18389, PETRI_PLACES=319, PETRI_TRANSITIONS=975} [2023-11-17 12:29:26,665 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 289 predicate places. [2023-11-17 12:29:26,665 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 975 transitions, 18389 flow [2023-11-17 12:29:26,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:26,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:26,665 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:26,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:26,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:26,866 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:29:26,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:26,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1008544526, now seen corresponding path program 16 times [2023-11-17 12:29:26,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:26,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318530350] [2023-11-17 12:29:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:26,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:26,946 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 12:29:26,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:26,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318530350] [2023-11-17 12:29:26,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318530350] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:26,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234922276] [2023-11-17 12:29:26,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:29:26,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:26,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:26,948 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:26,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-17 12:29:27,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:29:27,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:27,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:29:27,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:27,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:27,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234922276] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:27,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:27,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-17 12:29:27,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935423251] [2023-11-17 12:29:27,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:27,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:29:27,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:27,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:29:27,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:29:27,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:29:27,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 975 transitions, 18389 flow. Second operand has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:27,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:27,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:29:27,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:29,826 INFO L124 PetriNetUnfolderBase]: 4925/7190 cut-off events. [2023-11-17 12:29:29,826 INFO L125 PetriNetUnfolderBase]: For 197535/197535 co-relation queries the response was YES. [2023-11-17 12:29:29,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75641 conditions, 7190 events. 4925/7190 cut-off events. For 197535/197535 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 38108 event pairs, 206 based on Foata normal form. 65/7255 useless extension candidates. Maximal degree in co-relation 75519. Up to 2265 conditions per place. [2023-11-17 12:29:29,900 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 681 selfloop transitions, 794 changer transitions 0/1475 dead transitions. [2023-11-17 12:29:29,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1475 transitions, 29714 flow [2023-11-17 12:29:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 12:29:29,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 12:29:29,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 480 transitions. [2023-11-17 12:29:29,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2023-11-17 12:29:29,901 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 480 transitions. [2023-11-17 12:29:29,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 480 transitions. [2023-11-17 12:29:29,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:29,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 480 transitions. [2023-11-17 12:29:29,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 10.909090909090908) internal successors, (480), 44 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:29,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 30.0) internal successors, (1350), 45 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:29,903 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 30.0) internal successors, (1350), 45 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:29,903 INFO L175 Difference]: Start difference. First operand has 319 places, 975 transitions, 18389 flow. Second operand 44 states and 480 transitions. [2023-11-17 12:29:29,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1475 transitions, 29714 flow [2023-11-17 12:29:30,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1475 transitions, 28997 flow, removed 289 selfloop flow, removed 7 redundant places. [2023-11-17 12:29:30,975 INFO L231 Difference]: Finished difference. Result has 364 places, 1177 transitions, 23634 flow [2023-11-17 12:29:30,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=17691, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=604, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=23634, PETRI_PLACES=364, PETRI_TRANSITIONS=1177} [2023-11-17 12:29:30,976 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 334 predicate places. [2023-11-17 12:29:30,976 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 1177 transitions, 23634 flow [2023-11-17 12:29:30,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:30,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:30,976 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:30,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:31,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:31,181 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:29:31,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:31,181 INFO L85 PathProgramCache]: Analyzing trace with hash 808759363, now seen corresponding path program 20 times [2023-11-17 12:29:31,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:31,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007754389] [2023-11-17 12:29:31,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:31,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:31,262 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 12:29:31,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:31,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007754389] [2023-11-17 12:29:31,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007754389] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:31,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759585811] [2023-11-17 12:29:31,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:29:31,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:31,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:31,263 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:31,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-17 12:29:31,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:29:31,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:31,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:29:31,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:31,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:31,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759585811] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:31,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:31,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-11-17 12:29:31,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104219951] [2023-11-17 12:29:31,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:31,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:29:31,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:31,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:29:31,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:29:31,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:29:31,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 1177 transitions, 23634 flow. Second operand has 21 states, 21 states have (on average 5.904761904761905) internal successors, (124), 21 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 12:29:31,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:31,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:29:31,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:33,509 INFO L124 PetriNetUnfolderBase]: 4878/7105 cut-off events. [2023-11-17 12:29:33,510 INFO L125 PetriNetUnfolderBase]: For 203383/203383 co-relation queries the response was YES. [2023-11-17 12:29:33,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77179 conditions, 7105 events. 4878/7105 cut-off events. For 203383/203383 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 37228 event pairs, 830 based on Foata normal form. 32/7137 useless extension candidates. Maximal degree in co-relation 77048. Up to 4469 conditions per place. [2023-11-17 12:29:33,714 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 969 selfloop transitions, 362 changer transitions 0/1331 dead transitions. [2023-11-17 12:29:33,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1331 transitions, 28403 flow [2023-11-17 12:29:33,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:29:33,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:29:33,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 145 transitions. [2023-11-17 12:29:33,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2023-11-17 12:29:33,717 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 145 transitions. [2023-11-17 12:29:33,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 145 transitions. [2023-11-17 12:29:33,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:33,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 145 transitions. [2023-11-17 12:29:33,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 11.153846153846153) internal successors, (145), 13 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:33,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 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 12:29:33,718 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 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 12:29:33,718 INFO L175 Difference]: Start difference. First operand has 364 places, 1177 transitions, 23634 flow. Second operand 13 states and 145 transitions. [2023-11-17 12:29:33,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1331 transitions, 28403 flow [2023-11-17 12:29:34,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1331 transitions, 26370 flow, removed 733 selfloop flow, removed 7 redundant places. [2023-11-17 12:29:34,929 INFO L231 Difference]: Finished difference. Result has 369 places, 1169 transitions, 22148 flow [2023-11-17 12:29:34,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=21424, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=22148, PETRI_PLACES=369, PETRI_TRANSITIONS=1169} [2023-11-17 12:29:34,929 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 339 predicate places. [2023-11-17 12:29:34,929 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1169 transitions, 22148 flow [2023-11-17 12:29:34,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.904761904761905) internal successors, (124), 21 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 12:29:34,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:34,929 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:34,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:35,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-17 12:29:35,134 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:29:35,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:35,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1359937466, now seen corresponding path program 17 times [2023-11-17 12:29:35,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:35,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4449048] [2023-11-17 12:29:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:35,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:35,213 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 12:29:35,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:35,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4449048] [2023-11-17 12:29:35,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4449048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:35,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527246400] [2023-11-17 12:29:35,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:29:35,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:35,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:35,214 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:35,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-17 12:29:35,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:29:35,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:35,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:29:35,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:35,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:35,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527246400] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:35,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:35,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-11-17 12:29:35,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544255816] [2023-11-17 12:29:35,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:35,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:29:35,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:29:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:29:35,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:29:35,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1169 transitions, 22148 flow. Second operand has 19 states, 19 states have (on average 6.315789473684211) internal successors, (120), 19 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:35,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:35,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:29:35,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:38,003 INFO L124 PetriNetUnfolderBase]: 4853/7060 cut-off events. [2023-11-17 12:29:38,004 INFO L125 PetriNetUnfolderBase]: For 158462/158462 co-relation queries the response was YES. [2023-11-17 12:29:38,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69599 conditions, 7060 events. 4853/7060 cut-off events. For 158462/158462 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 37055 event pairs, 206 based on Foata normal form. 18/7078 useless extension candidates. Maximal degree in co-relation 69469. Up to 2206 conditions per place. [2023-11-17 12:29:38,079 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 678 selfloop transitions, 789 changer transitions 0/1467 dead transitions. [2023-11-17 12:29:38,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 1467 transitions, 29251 flow [2023-11-17 12:29:38,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-17 12:29:38,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-17 12:29:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 493 transitions. [2023-11-17 12:29:38,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.349645390070922 [2023-11-17 12:29:38,080 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 493 transitions. [2023-11-17 12:29:38,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 493 transitions. [2023-11-17 12:29:38,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:38,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 493 transitions. [2023-11-17 12:29:38,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 10.48936170212766) internal successors, (493), 47 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:38,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 30.0) internal successors, (1440), 48 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:38,083 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 30.0) internal successors, (1440), 48 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:38,083 INFO L175 Difference]: Start difference. First operand has 369 places, 1169 transitions, 22148 flow. Second operand 47 states and 493 transitions. [2023-11-17 12:29:38,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 1467 transitions, 29251 flow [2023-11-17 12:29:39,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1467 transitions, 28310 flow, removed 73 selfloop flow, removed 15 redundant places. [2023-11-17 12:29:39,088 INFO L231 Difference]: Finished difference. Result has 403 places, 1162 transitions, 22906 flow [2023-11-17 12:29:39,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=21121, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=786, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=22906, PETRI_PLACES=403, PETRI_TRANSITIONS=1162} [2023-11-17 12:29:39,089 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 373 predicate places. [2023-11-17 12:29:39,089 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 1162 transitions, 22906 flow [2023-11-17 12:29:39,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.315789473684211) internal successors, (120), 19 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:39,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:39,089 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:39,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:39,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-17 12:29:39,289 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:29:39,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:39,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1112818460, now seen corresponding path program 18 times [2023-11-17 12:29:39,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:39,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338013257] [2023-11-17 12:29:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:39,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:39,380 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 12:29:39,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:39,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338013257] [2023-11-17 12:29:39,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338013257] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:39,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250640923] [2023-11-17 12:29:39,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:29:39,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:39,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:39,382 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:39,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-17 12:29:39,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:29:39,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:39,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:29:39,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:39,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:39,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250640923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:39,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:39,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-11-17 12:29:39,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496056692] [2023-11-17 12:29:39,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:39,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:29:39,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:39,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:29:39,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:29:39,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:29:39,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1162 transitions, 22906 flow. Second operand has 20 states, 20 states have (on average 6.05) internal successors, (121), 20 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:39,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:39,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:29:39,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:41,657 INFO L124 PetriNetUnfolderBase]: 4922/7181 cut-off events. [2023-11-17 12:29:41,657 INFO L125 PetriNetUnfolderBase]: For 167306/167306 co-relation queries the response was YES. [2023-11-17 12:29:41,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72331 conditions, 7181 events. 4922/7181 cut-off events. For 167306/167306 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 37809 event pairs, 506 based on Foata normal form. 16/7197 useless extension candidates. Maximal degree in co-relation 72202. Up to 2594 conditions per place. [2023-11-17 12:29:41,845 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 911 selfloop transitions, 397 changer transitions 0/1308 dead transitions. [2023-11-17 12:29:41,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1308 transitions, 27679 flow [2023-11-17 12:29:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:29:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:29:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2023-11-17 12:29:41,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37666666666666665 [2023-11-17 12:29:41,846 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 113 transitions. [2023-11-17 12:29:41,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 113 transitions. [2023-11-17 12:29:41,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:41,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 113 transitions. [2023-11-17 12:29:41,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:41,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:29:41,849 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 12:29:41,849 INFO L175 Difference]: Start difference. First operand has 403 places, 1162 transitions, 22906 flow. Second operand 10 states and 113 transitions. [2023-11-17 12:29:41,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1308 transitions, 27679 flow [2023-11-17 12:29:42,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1308 transitions, 25868 flow, removed 39 selfloop flow, removed 43 redundant places. [2023-11-17 12:29:42,786 INFO L231 Difference]: Finished difference. Result has 366 places, 1155 transitions, 21732 flow [2023-11-17 12:29:42,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=20938, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=758, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=21732, PETRI_PLACES=366, PETRI_TRANSITIONS=1155} [2023-11-17 12:29:42,787 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 336 predicate places. [2023-11-17 12:29:42,787 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 1155 transitions, 21732 flow [2023-11-17 12:29:42,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.05) internal successors, (121), 20 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:42,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:42,787 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:42,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:42,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:42,988 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:29:42,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:42,988 INFO L85 PathProgramCache]: Analyzing trace with hash 176024294, now seen corresponding path program 19 times [2023-11-17 12:29:42,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:42,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919505097] [2023-11-17 12:29:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:42,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:43,069 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 12:29:43,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:43,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919505097] [2023-11-17 12:29:43,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919505097] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:43,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761120185] [2023-11-17 12:29:43,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:29:43,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:43,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:43,071 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:43,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-17 12:29:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:43,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:29:43,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:43,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:43,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761120185] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:43,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:43,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-11-17 12:29:43,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250747708] [2023-11-17 12:29:43,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:43,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:29:43,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:43,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:29:43,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:29:43,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:29:43,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1155 transitions, 21732 flow. Second operand has 20 states, 20 states have (on average 6.05) internal successors, (121), 20 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:43,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:43,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:29:43,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:45,363 INFO L124 PetriNetUnfolderBase]: 4929/7194 cut-off events. [2023-11-17 12:29:45,364 INFO L125 PetriNetUnfolderBase]: For 163843/163843 co-relation queries the response was YES. [2023-11-17 12:29:45,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71343 conditions, 7194 events. 4929/7194 cut-off events. For 163843/163843 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 37798 event pairs, 878 based on Foata normal form. 18/7212 useless extension candidates. Maximal degree in co-relation 71217. Up to 4507 conditions per place. [2023-11-17 12:29:45,443 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 953 selfloop transitions, 349 changer transitions 0/1302 dead transitions. [2023-11-17 12:29:45,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1302 transitions, 26459 flow [2023-11-17 12:29:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:29:45,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:29:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2023-11-17 12:29:45,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2023-11-17 12:29:45,444 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 136 transitions. [2023-11-17 12:29:45,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 136 transitions. [2023-11-17 12:29:45,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:45,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 136 transitions. [2023-11-17 12:29:45,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:45,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 30.0) internal successors, (390), 13 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:45,444 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 30.0) internal successors, (390), 13 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:45,444 INFO L175 Difference]: Start difference. First operand has 366 places, 1155 transitions, 21732 flow. Second operand 12 states and 136 transitions. [2023-11-17 12:29:45,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1302 transitions, 26459 flow [2023-11-17 12:29:46,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1302 transitions, 25736 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-17 12:29:46,387 INFO L231 Difference]: Finished difference. Result has 370 places, 1158 transitions, 21802 flow [2023-11-17 12:29:46,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=21017, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21802, PETRI_PLACES=370, PETRI_TRANSITIONS=1158} [2023-11-17 12:29:46,388 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 340 predicate places. [2023-11-17 12:29:46,388 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1158 transitions, 21802 flow [2023-11-17 12:29:46,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.05) internal successors, (121), 20 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:46,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:46,388 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:46,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:46,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-11-17 12:29:46,593 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:29:46,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:46,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1800993637, now seen corresponding path program 21 times [2023-11-17 12:29:46,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:46,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806204723] [2023-11-17 12:29:46,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:46,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:46,728 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 12:29:46,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:46,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806204723] [2023-11-17 12:29:46,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806204723] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:46,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689470531] [2023-11-17 12:29:46,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:29:46,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:46,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:46,729 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:46,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-17 12:29:46,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:29:46,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:46,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:29:46,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:46,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:46,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689470531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:46,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:46,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-11-17 12:29:46,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708706743] [2023-11-17 12:29:46,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:46,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:29:46,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:46,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:29:46,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:29:46,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:29:46,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1158 transitions, 21802 flow. Second operand has 20 states, 20 states have (on average 6.1) internal successors, (122), 20 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:46,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:46,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:29:46,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:48,800 INFO L124 PetriNetUnfolderBase]: 4743/6860 cut-off events. [2023-11-17 12:29:48,801 INFO L125 PetriNetUnfolderBase]: For 157092/157092 co-relation queries the response was YES. [2023-11-17 12:29:48,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68769 conditions, 6860 events. 4743/6860 cut-off events. For 157092/157092 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 35201 event pairs, 677 based on Foata normal form. 123/6983 useless extension candidates. Maximal degree in co-relation 68642. Up to 4085 conditions per place. [2023-11-17 12:29:48,888 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 844 selfloop transitions, 524 changer transitions 0/1368 dead transitions. [2023-11-17 12:29:48,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1368 transitions, 26981 flow [2023-11-17 12:29:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:29:48,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:29:48,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 174 transitions. [2023-11-17 12:29:48,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2023-11-17 12:29:48,889 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 174 transitions. [2023-11-17 12:29:48,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 174 transitions. [2023-11-17 12:29:48,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:48,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 174 transitions. [2023-11-17 12:29:48,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 11.6) internal successors, (174), 15 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:48,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 30.0) internal successors, (480), 16 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:48,890 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 30.0) internal successors, (480), 16 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:48,890 INFO L175 Difference]: Start difference. First operand has 370 places, 1158 transitions, 21802 flow. Second operand 15 states and 174 transitions. [2023-11-17 12:29:48,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1368 transitions, 26981 flow [2023-11-17 12:29:49,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1368 transitions, 26279 flow, removed 9 selfloop flow, removed 10 redundant places. [2023-11-17 12:29:49,865 INFO L231 Difference]: Finished difference. Result has 374 places, 1140 transitions, 21675 flow [2023-11-17 12:29:49,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=20377, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=509, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=21675, PETRI_PLACES=374, PETRI_TRANSITIONS=1140} [2023-11-17 12:29:49,866 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 344 predicate places. [2023-11-17 12:29:49,866 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1140 transitions, 21675 flow [2023-11-17 12:29:49,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.1) internal successors, (122), 20 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:49,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:49,866 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:49,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:50,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-11-17 12:29:50,067 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:29:50,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:50,067 INFO L85 PathProgramCache]: Analyzing trace with hash -109263562, now seen corresponding path program 20 times [2023-11-17 12:29:50,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:50,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093359624] [2023-11-17 12:29:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:50,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:50,147 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 12:29:50,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:50,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093359624] [2023-11-17 12:29:50,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093359624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:50,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419286139] [2023-11-17 12:29:50,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:29:50,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:50,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:50,149 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:50,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-17 12:29:50,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:29:50,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:50,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:29:50,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:50,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:50,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419286139] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:50,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:50,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-11-17 12:29:50,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243015881] [2023-11-17 12:29:50,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:50,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:29:50,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:50,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:29:50,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:29:50,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:29:50,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1140 transitions, 21675 flow. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:50,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:50,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:29:50,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:52,393 INFO L124 PetriNetUnfolderBase]: 4703/6790 cut-off events. [2023-11-17 12:29:52,393 INFO L125 PetriNetUnfolderBase]: For 158103/158103 co-relation queries the response was YES. [2023-11-17 12:29:52,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69010 conditions, 6790 events. 4703/6790 cut-off events. For 158103/158103 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 34486 event pairs, 1058 based on Foata normal form. 28/6818 useless extension candidates. Maximal degree in co-relation 68883. Up to 5760 conditions per place. [2023-11-17 12:29:52,464 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 975 selfloop transitions, 221 changer transitions 0/1196 dead transitions. [2023-11-17 12:29:52,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1196 transitions, 24886 flow [2023-11-17 12:29:52,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:29:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:29:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2023-11-17 12:29:52,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3606060606060606 [2023-11-17 12:29:52,465 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 119 transitions. [2023-11-17 12:29:52,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 119 transitions. [2023-11-17 12:29:52,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:52,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 119 transitions. [2023-11-17 12:29:52,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:52,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 30.0) internal successors, (360), 12 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:52,466 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 30.0) internal successors, (360), 12 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:52,466 INFO L175 Difference]: Start difference. First operand has 374 places, 1140 transitions, 21675 flow. Second operand 11 states and 119 transitions. [2023-11-17 12:29:52,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1196 transitions, 24886 flow [2023-11-17 12:29:53,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 1196 transitions, 24068 flow, removed 37 selfloop flow, removed 11 redundant places. [2023-11-17 12:29:53,261 INFO L231 Difference]: Finished difference. Result has 374 places, 1137 transitions, 21285 flow [2023-11-17 12:29:53,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=20763, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=914, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21285, PETRI_PLACES=374, PETRI_TRANSITIONS=1137} [2023-11-17 12:29:53,262 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 344 predicate places. [2023-11-17 12:29:53,262 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1137 transitions, 21285 flow [2023-11-17 12:29:53,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:53,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:53,262 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:53,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:53,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:53,467 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:29:53,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:53,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1207528495, now seen corresponding path program 7 times [2023-11-17 12:29:53,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:53,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368934363] [2023-11-17 12:29:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:53,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:53,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:53,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368934363] [2023-11-17 12:29:53,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368934363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:53,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934690392] [2023-11-17 12:29:53,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:29:53,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:53,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:53,976 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:54,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-17 12:29:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:54,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-17 12:29:54,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:54,374 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 18 treesize of output 16 [2023-11-17 12:29:54,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 12:29:54,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2023-11-17 12:29:54,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 30 [2023-11-17 12:29:54,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 30 [2023-11-17 12:29:54,863 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 54 treesize of output 39 [2023-11-17 12:29:55,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:29:55,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 28 [2023-11-17 12:29:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:55,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:55,445 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1926 (Array Int Int))) (= (mod (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1926) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* c_~N~0 4) (- 4))) c_~sum3~0 (select .cse0 c_~A~0.offset) c_~sum2~0)) 4294967296) (mod (let ((.cse1 (select |c_#memory_int| c_~A~0.base))) (+ (select .cse1 c_~A~0.offset) c_~sum1~0 (select .cse1 (+ c_~A~0.offset 4)))) 4294967296))) is different from false [2023-11-17 12:29:55,645 INFO L349 Elim1Store]: treesize reduction 25, result has 51.0 percent of original size [2023-11-17 12:29:55,646 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 147 treesize of output 93 [2023-11-17 12:29:55,725 INFO L349 Elim1Store]: treesize reduction 10, result has 87.0 percent of original size [2023-11-17 12:29:55,726 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 20776 treesize of output 18696 [2023-11-17 12:29:55,754 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:29:55,755 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 144 treesize of output 117 [2023-11-17 12:29:55,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:29:55,788 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 245 treesize of output 240 [2023-11-17 12:29:55,813 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:29:55,814 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 224 treesize of output 198 [2023-11-17 12:30:00,253 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 12:30:02,461 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 12:30:07,549 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 12:30:38,166 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 12:30:39,039 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 12:31:06,377 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 12:31:57,650 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 12:32:06,464 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 12:32:29,958 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 12:34:19,633 WARN L293 SmtUtils]: Spent 1.52m on a formula simplification. DAG size of input: 2102 DAG size of output: 1845 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 12:34:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:19,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934690392] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:34:19,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:34:19,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-11-17 12:34:19,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546919475] [2023-11-17 12:34:19,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:34:19,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 12:34:19,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:34:19,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 12:34:19,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1296, Unknown=25, NotChecked=74, Total=1560 [2023-11-17 12:34:19,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:34:19,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1137 transitions, 21285 flow. Second operand has 40 states, 40 states have (on average 5.95) internal successors, (238), 40 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:19,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:34:19,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:34:19,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:34:22,623 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1926 (Array Int Int)) (v_ArrVal_1925 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1925))) (= (mod (let ((.cse0 (select .cse1 c_~A~0.base))) (+ (select .cse0 c_~A~0.offset) c_~sum1~0 (select .cse0 (+ c_~A~0.offset 4)))) 4294967296) (mod (let ((.cse2 (select (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1926) c_~A~0.base))) (+ (select .cse2 (+ c_~A~0.offset (* c_~N~0 4) (- 4))) c_~sum3~0 (select .cse2 c_~A~0.offset) c_~sum2~0)) 4294967296)))) (<= c_~sum2~0 2147483647) (<= c_~sum2~0 (+ c_~sum1~0 2147483648)) (= c_~sum1~0 (+ c_~sum3~0 c_~sum2~0)) (<= 0 (+ c_~sum2~0 2147483648)) (<= c_~sum1~0 (+ 2147483647 c_~sum2~0))) is different from false [2023-11-17 12:34:33,347 INFO L124 PetriNetUnfolderBase]: 6166/8932 cut-off events. [2023-11-17 12:34:33,347 INFO L125 PetriNetUnfolderBase]: For 207176/207176 co-relation queries the response was YES. [2023-11-17 12:34:33,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91873 conditions, 8932 events. 6166/8932 cut-off events. For 207176/207176 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 47635 event pairs, 498 based on Foata normal form. 1/8933 useless extension candidates. Maximal degree in co-relation 91745. Up to 7319 conditions per place. [2023-11-17 12:34:33,472 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 1278 selfloop transitions, 469 changer transitions 2/1749 dead transitions. [2023-11-17 12:34:33,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1749 transitions, 36782 flow [2023-11-17 12:34:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:34:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:34:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 287 transitions. [2023-11-17 12:34:33,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2023-11-17 12:34:33,473 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 287 transitions. [2023-11-17 12:34:33,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 287 transitions. [2023-11-17 12:34:33,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:34:33,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 287 transitions. [2023-11-17 12:34:33,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 13.666666666666666) internal successors, (287), 21 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:33,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 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 12:34:33,475 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 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 12:34:33,475 INFO L175 Difference]: Start difference. First operand has 374 places, 1137 transitions, 21285 flow. Second operand 21 states and 287 transitions. [2023-11-17 12:34:33,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1749 transitions, 36782 flow [2023-11-17 12:34:34,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 1749 transitions, 35874 flow, removed 41 selfloop flow, removed 9 redundant places. [2023-11-17 12:34:34,956 INFO L231 Difference]: Finished difference. Result has 399 places, 1525 transitions, 31134 flow [2023-11-17 12:34:34,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=20832, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=822, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=31134, PETRI_PLACES=399, PETRI_TRANSITIONS=1525} [2023-11-17 12:34:34,957 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 369 predicate places. [2023-11-17 12:34:34,957 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 1525 transitions, 31134 flow [2023-11-17 12:34:34,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.95) internal successors, (238), 40 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:34,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:34:34,958 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:34:34,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-11-17 12:34:35,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:35,165 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:34:35,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:34:35,166 INFO L85 PathProgramCache]: Analyzing trace with hash 532780863, now seen corresponding path program 8 times [2023-11-17 12:34:35,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:34:35,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005297339] [2023-11-17 12:34:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:34:35,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:34:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:34:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:35,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:34:35,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005297339] [2023-11-17 12:34:35,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005297339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:34:35,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598644315] [2023-11-17 12:34:35,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:34:35,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:35,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:34:35,829 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:34:35,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-17 12:34:35,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:34:35,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:34:35,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 12:34:35,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:34:36,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:34:36,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:34:36,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2023-11-17 12:34:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:34:36,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:34:36,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:34:36,547 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 41 treesize of output 49 [2023-11-17 12:34:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:34:36,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598644315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:34:36,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:34:36,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 32 [2023-11-17 12:34:36,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312196501] [2023-11-17 12:34:36,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:34:36,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 12:34:36,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:34:36,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 12:34:36,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 12:34:36,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:34:36,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 1525 transitions, 31134 flow. Second operand has 34 states, 34 states have (on average 6.264705882352941) internal successors, (213), 34 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:36,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:34:36,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:34:36,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:34:42,033 INFO L124 PetriNetUnfolderBase]: 8044/11682 cut-off events. [2023-11-17 12:34:42,033 INFO L125 PetriNetUnfolderBase]: For 326745/326745 co-relation queries the response was YES. [2023-11-17 12:34:42,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126287 conditions, 11682 events. 8044/11682 cut-off events. For 326745/326745 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 65142 event pairs, 613 based on Foata normal form. 2/11684 useless extension candidates. Maximal degree in co-relation 126145. Up to 8909 conditions per place. [2023-11-17 12:34:42,208 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 1637 selfloop transitions, 688 changer transitions 4/2329 dead transitions. [2023-11-17 12:34:42,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 2329 transitions, 50651 flow [2023-11-17 12:34:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-17 12:34:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-17 12:34:42,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 532 transitions. [2023-11-17 12:34:42,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-11-17 12:34:42,209 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 532 transitions. [2023-11-17 12:34:42,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 532 transitions. [2023-11-17 12:34:42,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:34:42,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 532 transitions. [2023-11-17 12:34:42,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 14.0) internal successors, (532), 38 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:42,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 30.0) internal successors, (1170), 39 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:42,211 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 30.0) internal successors, (1170), 39 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:42,211 INFO L175 Difference]: Start difference. First operand has 399 places, 1525 transitions, 31134 flow. Second operand 38 states and 532 transitions. [2023-11-17 12:34:42,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 2329 transitions, 50651 flow [2023-11-17 12:34:44,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 2329 transitions, 48747 flow, removed 950 selfloop flow, removed 2 redundant places. [2023-11-17 12:34:44,913 INFO L231 Difference]: Finished difference. Result has 451 places, 1935 transitions, 40565 flow [2023-11-17 12:34:44,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=29750, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1096, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=40565, PETRI_PLACES=451, PETRI_TRANSITIONS=1935} [2023-11-17 12:34:44,915 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 421 predicate places. [2023-11-17 12:34:44,915 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 1935 transitions, 40565 flow [2023-11-17 12:34:44,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.264705882352941) internal successors, (213), 34 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:44,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:34:44,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:34:44,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-11-17 12:34:45,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-17 12:34:45,120 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:34:45,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:34:45,120 INFO L85 PathProgramCache]: Analyzing trace with hash -501669363, now seen corresponding path program 9 times [2023-11-17 12:34:45,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:34:45,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071769104] [2023-11-17 12:34:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:34:45,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:34:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:34:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:45,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:34:45,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071769104] [2023-11-17 12:34:45,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071769104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:34:45,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697623413] [2023-11-17 12:34:45,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:34:45,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:45,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:34:45,549 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:34:45,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-17 12:34:45,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:34:45,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:34:45,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-17 12:34:45,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:34:46,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:34:46,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2023-11-17 12:34:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:46,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:34:46,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:34:46,271 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 44 treesize of output 61 [2023-11-17 12:34:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:53,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697623413] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:34:53,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:34:53,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-17 12:34:53,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504778686] [2023-11-17 12:34:53,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:34:53,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 12:34:53,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:34:53,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 12:34:53,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2023-11-17 12:34:53,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:34:53,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 1935 transitions, 40565 flow. Second operand has 33 states, 33 states have (on average 6.212121212121212) internal successors, (205), 33 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:53,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:34:53,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:34:53,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:35:00,132 INFO L124 PetriNetUnfolderBase]: 8778/12724 cut-off events. [2023-11-17 12:35:00,132 INFO L125 PetriNetUnfolderBase]: For 362015/362015 co-relation queries the response was YES. [2023-11-17 12:35:00,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138403 conditions, 12724 events. 8778/12724 cut-off events. For 362015/362015 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 71528 event pairs, 774 based on Foata normal form. 3/12727 useless extension candidates. Maximal degree in co-relation 138243. Up to 10833 conditions per place. [2023-11-17 12:35:00,315 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 1801 selfloop transitions, 521 changer transitions 14/2336 dead transitions. [2023-11-17 12:35:00,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 2336 transitions, 52238 flow [2023-11-17 12:35:00,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 12:35:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 12:35:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 325 transitions. [2023-11-17 12:35:00,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47101449275362317 [2023-11-17 12:35:00,316 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 325 transitions. [2023-11-17 12:35:00,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 325 transitions. [2023-11-17 12:35:00,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:35:00,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 325 transitions. [2023-11-17 12:35:00,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 14.130434782608695) internal successors, (325), 23 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:35:00,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 30.0) internal successors, (720), 24 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:35:00,317 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 30.0) internal successors, (720), 24 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:35:00,317 INFO L175 Difference]: Start difference. First operand has 451 places, 1935 transitions, 40565 flow. Second operand 23 states and 325 transitions. [2023-11-17 12:35:00,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 2336 transitions, 52238 flow [2023-11-17 12:35:03,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 2336 transitions, 47911 flow, removed 2067 selfloop flow, removed 8 redundant places. [2023-11-17 12:35:03,941 INFO L231 Difference]: Finished difference. Result has 476 places, 2105 transitions, 41532 flow [2023-11-17 12:35:03,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=36400, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=41532, PETRI_PLACES=476, PETRI_TRANSITIONS=2105} [2023-11-17 12:35:03,942 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 446 predicate places. [2023-11-17 12:35:03,943 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 2105 transitions, 41532 flow [2023-11-17 12:35:03,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.212121212121212) internal successors, (205), 33 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:35:03,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:35:03,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:35:03,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-11-17 12:35:04,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:35:04,148 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:35:04,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:35:04,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1227377971, now seen corresponding path program 10 times [2023-11-17 12:35:04,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:35:04,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291515346] [2023-11-17 12:35:04,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:35:04,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:35:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:35:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:35:04,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:35:04,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291515346] [2023-11-17 12:35:04,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291515346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:35:04,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410580135] [2023-11-17 12:35:04,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:35:04,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:35:04,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:35:04,605 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:35:04,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-17 12:35:04,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:35:04,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:35:04,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 12:35:04,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:35:04,997 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 12:35:05,038 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 32 treesize of output 16 [2023-11-17 12:35:05,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:35:05,101 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 41 treesize of output 30 [2023-11-17 12:35:05,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:35:05,161 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 41 treesize of output 30 [2023-11-17 12:35:05,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:35:05,220 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 41 treesize of output 30 [2023-11-17 12:35:05,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:35:05,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 28 [2023-11-17 12:35:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:35:05,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:35:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:35:06,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410580135] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:35:06,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:35:06,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 8] total 33 [2023-11-17 12:35:06,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485301804] [2023-11-17 12:35:06,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:35:06,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:35:06,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:35:06,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:35:06,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:35:06,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-17 12:35:06,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 2105 transitions, 41532 flow. Second operand has 35 states, 35 states have (on average 6.2) internal successors, (217), 35 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:35:06,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:35:06,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-17 12:35:06,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:35:09,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:35:16,156 INFO L124 PetriNetUnfolderBase]: 10194/14737 cut-off events. [2023-11-17 12:35:16,156 INFO L125 PetriNetUnfolderBase]: For 383925/383925 co-relation queries the response was YES. [2023-11-17 12:35:16,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155820 conditions, 14737 events. 10194/14737 cut-off events. For 383925/383925 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 84402 event pairs, 639 based on Foata normal form. 4/14741 useless extension candidates. Maximal degree in co-relation 155649. Up to 10467 conditions per place. [2023-11-17 12:35:16,359 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 1476 selfloop transitions, 1195 changer transitions 7/2678 dead transitions. [2023-11-17 12:35:16,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 2678 transitions, 57262 flow [2023-11-17 12:35:16,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:35:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:35:16,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 423 transitions. [2023-11-17 12:35:16,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45483870967741935 [2023-11-17 12:35:16,361 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 423 transitions. [2023-11-17 12:35:16,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 423 transitions. [2023-11-17 12:35:16,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:35:16,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 423 transitions. [2023-11-17 12:35:16,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 13.64516129032258) internal successors, (423), 31 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:35:16,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 30.0) internal successors, (960), 32 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:35:16,363 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 30.0) internal successors, (960), 32 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:35:16,363 INFO L175 Difference]: Start difference. First operand has 476 places, 2105 transitions, 41532 flow. Second operand 31 states and 423 transitions. [2023-11-17 12:35:16,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 2678 transitions, 57262 flow [2023-11-17 12:35:20,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 2678 transitions, 55536 flow, removed 763 selfloop flow, removed 6 redundant places. [2023-11-17 12:35:20,428 INFO L231 Difference]: Finished difference. Result has 517 places, 2368 transitions, 49343 flow [2023-11-17 12:35:20,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=40152, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=944, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=949, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=49343, PETRI_PLACES=517, PETRI_TRANSITIONS=2368} [2023-11-17 12:35:20,429 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 487 predicate places. [2023-11-17 12:35:20,429 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 2368 transitions, 49343 flow [2023-11-17 12:35:20,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.2) internal successors, (217), 35 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:35:20,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:35:20,430 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:35:20,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-11-17 12:35:20,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-11-17 12:35:20,630 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:35:20,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:35:20,630 INFO L85 PathProgramCache]: Analyzing trace with hash -758137187, now seen corresponding path program 11 times [2023-11-17 12:35:20,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:35:20,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395843193] [2023-11-17 12:35:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:35:20,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:35:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:35:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:35:21,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:35:21,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395843193] [2023-11-17 12:35:21,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395843193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:35:21,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497361233] [2023-11-17 12:35:21,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:35:21,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:35:21,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:35:21,038 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:35:21,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-17 12:35:21,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:35:21,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:35:21,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 12:35:21,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:35:21,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:35:21,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2023-11-17 12:35:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:35:21,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:35:21,831 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 12:35:21,831 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 43 treesize of output 51 Received shutdown request... [2023-11-17 12:35:21,991 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-11-17 12:35:21,992 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:35:21,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-11-17 12:35:22,024 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 12:35:22,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-11-17 12:35:22,192 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while ExplicitLhsPolynomialRelations was build 0 of 4 xjuncts. [2023-11-17 12:35:22,194 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-11-17 12:35:22,194 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-17 12:35:22,194 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-11-17 12:35:22,194 INFO L445 BasicCegarLoop]: Path program histogram: [21, 20, 11, 6, 1, 1, 1, 1, 1] [2023-11-17 12:35:22,196 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:35:22,196 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:35:22,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:35:22 BasicIcfg [2023-11-17 12:35:22,198 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:35:22,198 INFO L158 Benchmark]: Toolchain (without parser) took 532178.32ms. Allocated memory was 272.6MB in the beginning and 5.9GB in the end (delta: 5.6GB). Free memory was 230.9MB in the beginning and 5.0GB in the end (delta: -4.8GB). Peak memory consumption was 868.5MB. Max. memory is 8.0GB. [2023-11-17 12:35:22,198 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 197.1MB. Free memory is still 146.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:35:22,199 INFO L158 Benchmark]: CACSL2BoogieTranslator took 163.72ms. Allocated memory is still 272.6MB. Free memory was 230.9MB in the beginning and 219.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 12:35:22,199 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.80ms. Allocated memory is still 272.6MB. Free memory was 219.3MB in the beginning and 217.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:35:22,199 INFO L158 Benchmark]: Boogie Preprocessor took 19.11ms. Allocated memory is still 272.6MB. Free memory was 217.2MB in the beginning and 215.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:35:22,199 INFO L158 Benchmark]: RCFGBuilder took 497.77ms. Allocated memory is still 272.6MB. Free memory was 215.7MB in the beginning and 173.7MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. [2023-11-17 12:35:22,199 INFO L158 Benchmark]: TraceAbstraction took 531469.24ms. Allocated memory was 272.6MB in the beginning and 5.9GB in the end (delta: 5.6GB). Free memory was 173.2MB in the beginning and 5.0GB in the end (delta: -4.8GB). Peak memory consumption was 810.8MB. Max. memory is 8.0GB. [2023-11-17 12:35:22,199 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 197.1MB. Free memory is still 146.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 163.72ms. Allocated memory is still 272.6MB. Free memory was 230.9MB in the beginning and 219.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.80ms. Allocated memory is still 272.6MB. Free memory was 219.3MB in the beginning and 217.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.11ms. Allocated memory is still 272.6MB. Free memory was 217.2MB in the beginning and 215.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 497.77ms. Allocated memory is still 272.6MB. Free memory was 215.7MB in the beginning and 173.7MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. * TraceAbstraction took 531469.24ms. Allocated memory was 272.6MB in the beginning and 5.9GB in the end (delta: 5.6GB). Free memory was 173.2MB in the beginning and 5.0GB in the end (delta: -4.8GB). Peak memory consumption was 810.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 31 PlacesBefore, 30 PlacesAfterwards, 25 TransitionsBefore, 24 TransitionsAfterwards, 144 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 138 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 128, independent: 124, independent conditional: 0, independent unconditional: 124, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 61, independent: 59, independent conditional: 0, independent unconditional: 59, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 61, independent: 59, independent conditional: 0, independent unconditional: 59, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 2, dependent conditional: 0, dependent unconditional: 2, 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: 128, independent: 65, independent conditional: 0, independent unconditional: 65, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 61, unknown conditional: 0, unknown unconditional: 61] , Statistics on independence cache: Total cache size (in pairs): 61, Positive cache size: 59, Positive conditional cache size: 0, Positive unconditional cache size: 59, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while ExplicitLhsPolynomialRelations was build 0 of 4 xjuncts. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while ExplicitLhsPolynomialRelations was build 0 of 4 xjuncts. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while ExplicitLhsPolynomialRelations was build 0 of 4 xjuncts. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while ExplicitLhsPolynomialRelations was build 0 of 4 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 531.4s, OverallIterations: 63, TraceHistogramMax: 3, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 200.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 40 mSolverCounterUnknown, 6319 SdHoareTripleChecker+Valid, 30.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6319 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 27.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2109 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 378 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 38999 IncrementalHoareTripleChecker+Invalid, 41526 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 378 mSolverCounterUnsat, 0 mSDtfsCounter, 38999 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3573 GetRequests, 1974 SyntacticMatches, 93 SemanticMatches, 1506 ConstructedPredicates, 17 IntricatePredicates, 0 DeprecatedPredicates, 12538 ImplicationChecksByTransitivity, 115.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49343occurred in iteration=62, InterpolantAutomatonStates: 883, 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: 0.7s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 309.2s InterpolantComputationTime, 2831 NumberOfCodeBlocks, 2805 NumberOfCodeBlocksAsserted, 166 NumberOfCheckSat, 4027 ConstructedInterpolants, 66 QuantifiedInterpolants, 68829 SizeOfPredicates, 376 NumberOfNonLiveVariables, 12698 ConjunctsInSsa, 1172 ConjunctsInUnsatCore, 178 InterpolantComputations, 9 PerfectInterpolantSequences, 319/759 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