/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 15:12:07,139 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 15:12:07,187 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-VariableLbe.epf [2023-08-24 15:12:07,191 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 15:12:07,192 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 15:12:07,211 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 15:12:07,212 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 15:12:07,212 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 15:12:07,213 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 15:12:07,213 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 15:12:07,213 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 15:12:07,214 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 15:12:07,214 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 15:12:07,214 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 15:12:07,215 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 15:12:07,215 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 15:12:07,215 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 15:12:07,216 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 15:12:07,216 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 15:12:07,216 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 15:12:07,217 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 15:12:07,217 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 15:12:07,217 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 15:12:07,217 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 15:12:07,218 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 15:12:07,218 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 15:12:07,218 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 15:12:07,219 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 15:12:07,219 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 15:12:07,219 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 15:12:07,219 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 15:12:07,220 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 15:12:07,220 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 15:12:07,220 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 15:12:07,221 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 15:12:07,221 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 15:12:07,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 15:12:07,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 15:12:07,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 15:12:07,550 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 15:12:07,550 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 15:12:07,552 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-08-24 15:12:08,653 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 15:12:08,885 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 15:12:08,886 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-08-24 15:12:08,893 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b7263e7/d169c76d9faa4708a5d6e3b4c7c708f2/FLAGa54bf7110 [2023-08-24 15:12:08,915 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b7263e7/d169c76d9faa4708a5d6e3b4c7c708f2 [2023-08-24 15:12:08,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 15:12:08,923 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 15:12:08,927 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 15:12:08,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 15:12:08,930 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 15:12:08,932 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:12:08" (1/1) ... [2023-08-24 15:12:08,933 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ada0709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:08, skipping insertion in model container [2023-08-24 15:12:08,933 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:12:08" (1/1) ... [2023-08-24 15:12:08,953 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 15:12:09,110 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-figure1.wvr.c[1991,2004] [2023-08-24 15:12:09,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 15:12:09,120 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 15:12:09,140 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-figure1.wvr.c[1991,2004] [2023-08-24 15:12:09,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 15:12:09,155 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 15:12:09,155 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 15:12:09,161 INFO L206 MainTranslator]: Completed translation [2023-08-24 15:12:09,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:09 WrapperNode [2023-08-24 15:12:09,163 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 15:12:09,164 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 15:12:09,164 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 15:12:09,164 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 15:12:09,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:09" (1/1) ... [2023-08-24 15:12:09,177 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:09" (1/1) ... [2023-08-24 15:12:09,199 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2023-08-24 15:12:09,199 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 15:12:09,200 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 15:12:09,201 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 15:12:09,201 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 15:12:09,208 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:09" (1/1) ... [2023-08-24 15:12:09,208 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:09" (1/1) ... [2023-08-24 15:12:09,217 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:09" (1/1) ... [2023-08-24 15:12:09,217 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:09" (1/1) ... [2023-08-24 15:12:09,226 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:09" (1/1) ... [2023-08-24 15:12:09,228 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:09" (1/1) ... [2023-08-24 15:12:09,229 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:09" (1/1) ... [2023-08-24 15:12:09,234 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:09" (1/1) ... [2023-08-24 15:12:09,237 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 15:12:09,238 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 15:12:09,238 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 15:12:09,238 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 15:12:09,239 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:09" (1/1) ... [2023-08-24 15:12:09,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 15:12:09,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:09,274 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) [2023-08-24 15:12:09,276 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 [2023-08-24 15:12:09,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 15:12:09,301 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 15:12:09,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 15:12:09,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 15:12:09,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 15:12:09,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 15:12:09,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 15:12:09,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 15:12:09,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 15:12:09,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 15:12:09,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 15:12:09,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 15:12:09,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 15:12:09,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 15:12:09,304 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 15:12:09,385 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 15:12:09,387 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 15:12:09,586 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 15:12:09,614 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 15:12:09,615 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 15:12:09,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:12:09 BoogieIcfgContainer [2023-08-24 15:12:09,616 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 15:12:09,618 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 15:12:09,618 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 15:12:09,621 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 15:12:09,621 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 03:12:08" (1/3) ... [2023-08-24 15:12:09,621 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acdb3eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:12:09, skipping insertion in model container [2023-08-24 15:12:09,621 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:09" (2/3) ... [2023-08-24 15:12:09,622 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acdb3eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:12:09, skipping insertion in model container [2023-08-24 15:12:09,622 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:12:09" (3/3) ... [2023-08-24 15:12:09,623 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-08-24 15:12:09,641 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 15:12:09,641 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 15:12:09,642 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 15:12:09,713 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 15:12:09,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 75 transitions, 166 flow [2023-08-24 15:12:09,814 INFO L124 PetriNetUnfolderBase]: 5/73 cut-off events. [2023-08-24 15:12:09,814 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 15:12:09,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 5/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-08-24 15:12:09,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 75 transitions, 166 flow [2023-08-24 15:12:09,823 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 65 transitions, 142 flow [2023-08-24 15:12:09,826 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 15:12:09,836 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 65 transitions, 142 flow [2023-08-24 15:12:09,840 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 65 transitions, 142 flow [2023-08-24 15:12:09,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 65 transitions, 142 flow [2023-08-24 15:12:09,866 INFO L124 PetriNetUnfolderBase]: 5/65 cut-off events. [2023-08-24 15:12:09,867 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 15:12:09,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 65 events. 5/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-08-24 15:12:09,869 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-24 15:12:11,579 INFO L134 LiptonReduction]: Checked pairs total: 591 [2023-08-24 15:12:11,579 INFO L136 LiptonReduction]: Total number of compositions: 55 [2023-08-24 15:12:11,591 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 15:12:11,596 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=LoopsAndPotentialCycles, 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;@73ab75ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 15:12:11,597 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 15:12:11,600 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 15:12:11,601 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-24 15:12:11,601 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 15:12:11,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:11,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:11,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:11,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:11,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1462205477, now seen corresponding path program 1 times [2023-08-24 15:12:11,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:11,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559898414] [2023-08-24 15:12:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:11,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:11,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:11,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559898414] [2023-08-24 15:12:11,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559898414] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:12:11,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:12:11,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 15:12:11,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401403423] [2023-08-24 15:12:11,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:12:11,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 15:12:11,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:11,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 15:12:11,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 15:12:11,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 130 [2023-08-24 15:12:11,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:11,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:11,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 130 [2023-08-24 15:12:11,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:11,993 INFO L124 PetriNetUnfolderBase]: 49/94 cut-off events. [2023-08-24 15:12:11,993 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-24 15:12:11,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 259 event pairs, 13 based on Foata normal form. 1/68 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2023-08-24 15:12:11,997 INFO L140 encePairwiseOnDemand]: 126/130 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-08-24 15:12:11,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2023-08-24 15:12:11,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 15:12:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 15:12:12,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-08-24 15:12:12,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461538461538461 [2023-08-24 15:12:12,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-08-24 15:12:12,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-08-24 15:12:12,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:12,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-08-24 15:12:12,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 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) [2023-08-24 15:12:12,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:12,026 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:12,028 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 213 transitions. [2023-08-24 15:12:12,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2023-08-24 15:12:12,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 15:12:12,032 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-08-24 15:12:12,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-08-24 15:12:12,037 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-24 15:12:12,037 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-08-24 15:12:12,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:12,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:12,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:12,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 15:12:12,039 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:12,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:12,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1937715720, now seen corresponding path program 1 times [2023-08-24 15:12:12,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:12,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098184493] [2023-08-24 15:12:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:12,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:12,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:12,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098184493] [2023-08-24 15:12:12,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098184493] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:12:12,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:12:12,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:12:12,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539611917] [2023-08-24 15:12:12,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:12:12,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:12:12,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:12,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:12:12,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:12:12,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:12,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:12,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:12,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:12,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:12,312 INFO L124 PetriNetUnfolderBase]: 77/149 cut-off events. [2023-08-24 15:12:12,312 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 15:12:12,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 149 events. 77/149 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 439 event pairs, 24 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 172. Up to 78 conditions per place. [2023-08-24 15:12:12,313 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 30 selfloop transitions, 3 changer transitions 3/36 dead transitions. [2023-08-24 15:12:12,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 36 transitions, 177 flow [2023-08-24 15:12:12,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:12:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:12:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 289 transitions. [2023-08-24 15:12:12,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44461538461538463 [2023-08-24 15:12:12,318 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 289 transitions. [2023-08-24 15:12:12,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 289 transitions. [2023-08-24 15:12:12,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:12,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 289 transitions. [2023-08-24 15:12:12,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:12,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:12,321 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:12,322 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 289 transitions. [2023-08-24 15:12:12,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 36 transitions, 177 flow [2023-08-24 15:12:12,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 36 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 15:12:12,323 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 72 flow [2023-08-24 15:12:12,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-24 15:12:12,324 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-24 15:12:12,324 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 72 flow [2023-08-24 15:12:12,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:12,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:12,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:12,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 15:12:12,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:12,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:12,326 INFO L85 PathProgramCache]: Analyzing trace with hash 207767600, now seen corresponding path program 2 times [2023-08-24 15:12:12,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:12,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305248057] [2023-08-24 15:12:12,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:12,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:12,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:12,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305248057] [2023-08-24 15:12:12,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305248057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:12,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196479502] [2023-08-24 15:12:12,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:12:12,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:12,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:12,457 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) [2023-08-24 15:12:12,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 15:12:12,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:12:12,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:12,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 15:12:12,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:12,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:12,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196479502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:12,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:12,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-24 15:12:12,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14412703] [2023-08-24 15:12:12,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:12,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 15:12:12,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:12,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 15:12:12,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-24 15:12:12,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:12,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 72 flow. Second operand has 8 states, 8 states have (on average 53.625) internal successors, (429), 8 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:12,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:12,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:12,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:12,843 INFO L124 PetriNetUnfolderBase]: 82/158 cut-off events. [2023-08-24 15:12:12,844 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2023-08-24 15:12:12,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 158 events. 82/158 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 499 event pairs, 13 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 148. Up to 53 conditions per place. [2023-08-24 15:12:12,848 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 35 selfloop transitions, 8 changer transitions 5/48 dead transitions. [2023-08-24 15:12:12,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 48 transitions, 282 flow [2023-08-24 15:12:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:12:12,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:12:12,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 403 transitions. [2023-08-24 15:12:12,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2023-08-24 15:12:12,852 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 403 transitions. [2023-08-24 15:12:12,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 403 transitions. [2023-08-24 15:12:12,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:12,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 403 transitions. [2023-08-24 15:12:12,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 57.57142857142857) internal successors, (403), 7 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:12,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 130.0) internal successors, (1040), 8 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:12,857 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 130.0) internal successors, (1040), 8 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:12,857 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 72 flow. Second operand 7 states and 403 transitions. [2023-08-24 15:12:12,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 48 transitions, 282 flow [2023-08-24 15:12:12,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 48 transitions, 258 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-24 15:12:12,861 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 123 flow [2023-08-24 15:12:12,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=123, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-24 15:12:12,862 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-08-24 15:12:12,862 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 123 flow [2023-08-24 15:12:12,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 53.625) internal successors, (429), 8 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:12,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:12,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:12,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:13,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:13,070 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:13,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:13,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1133264402, now seen corresponding path program 3 times [2023-08-24 15:12:13,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:13,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351749029] [2023-08-24 15:12:13,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:13,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:13,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:13,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351749029] [2023-08-24 15:12:13,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351749029] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:12:13,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:12:13,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:12:13,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106478712] [2023-08-24 15:12:13,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:12:13,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:12:13,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:13,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:12:13,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:12:13,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:13,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:13,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:13,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:13,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:13,281 INFO L124 PetriNetUnfolderBase]: 71/136 cut-off events. [2023-08-24 15:12:13,281 INFO L125 PetriNetUnfolderBase]: For 261/261 co-relation queries the response was YES. [2023-08-24 15:12:13,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 136 events. 71/136 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 361 event pairs, 21 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 297. Up to 99 conditions per place. [2023-08-24 15:12:13,284 INFO L140 encePairwiseOnDemand]: 125/130 looper letters, 23 selfloop transitions, 9 changer transitions 2/34 dead transitions. [2023-08-24 15:12:13,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 242 flow [2023-08-24 15:12:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:12:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:12:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 283 transitions. [2023-08-24 15:12:13,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43538461538461537 [2023-08-24 15:12:13,286 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 283 transitions. [2023-08-24 15:12:13,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 283 transitions. [2023-08-24 15:12:13,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:13,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 283 transitions. [2023-08-24 15:12:13,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 56.6) internal successors, (283), 5 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:13,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:13,289 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:13,289 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 123 flow. Second operand 5 states and 283 transitions. [2023-08-24 15:12:13,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 242 flow [2023-08-24 15:12:13,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 34 transitions, 226 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-24 15:12:13,296 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 158 flow [2023-08-24 15:12:13,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2023-08-24 15:12:13,297 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 17 predicate places. [2023-08-24 15:12:13,297 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 158 flow [2023-08-24 15:12:13,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:13,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:13,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:13,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 15:12:13,298 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:13,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:13,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1019723230, now seen corresponding path program 4 times [2023-08-24 15:12:13,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:13,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331499599] [2023-08-24 15:12:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:13,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:13,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331499599] [2023-08-24 15:12:13,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331499599] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:12:13,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:12:13,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:12:13,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190447105] [2023-08-24 15:12:13,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:12:13,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:12:13,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:13,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:12:13,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:12:13,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:13,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:13,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:13,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:13,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:13,445 INFO L124 PetriNetUnfolderBase]: 68/131 cut-off events. [2023-08-24 15:12:13,445 INFO L125 PetriNetUnfolderBase]: For 407/407 co-relation queries the response was YES. [2023-08-24 15:12:13,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 131 events. 68/131 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 342 event pairs, 28 based on Foata normal form. 2/133 useless extension candidates. Maximal degree in co-relation 313. Up to 116 conditions per place. [2023-08-24 15:12:13,447 INFO L140 encePairwiseOnDemand]: 126/130 looper letters, 25 selfloop transitions, 6 changer transitions 2/33 dead transitions. [2023-08-24 15:12:13,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 267 flow [2023-08-24 15:12:13,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:12:13,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:12:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 280 transitions. [2023-08-24 15:12:13,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2023-08-24 15:12:13,449 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 280 transitions. [2023-08-24 15:12:13,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 280 transitions. [2023-08-24 15:12:13,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:13,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 280 transitions. [2023-08-24 15:12:13,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:13,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:13,452 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:13,452 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 158 flow. Second operand 5 states and 280 transitions. [2023-08-24 15:12:13,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 267 flow [2023-08-24 15:12:13,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 243 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-24 15:12:13,455 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 178 flow [2023-08-24 15:12:13,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-24 15:12:13,458 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2023-08-24 15:12:13,458 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 178 flow [2023-08-24 15:12:13,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:13,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:13,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:13,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 15:12:13,459 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:13,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:13,459 INFO L85 PathProgramCache]: Analyzing trace with hash -898431814, now seen corresponding path program 5 times [2023-08-24 15:12:13,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:13,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348314509] [2023-08-24 15:12:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:13,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:13,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:13,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348314509] [2023-08-24 15:12:13,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348314509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:13,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612845951] [2023-08-24 15:12:13,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:12:13,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:13,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:13,538 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) [2023-08-24 15:12:13,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 15:12:13,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:12:13,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:13,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 15:12:13,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:13,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:13,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612845951] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:13,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:13,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-24 15:12:13,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162689724] [2023-08-24 15:12:13,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:13,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:12:13,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:13,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:12:13,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-24 15:12:13,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:13,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 178 flow. Second operand has 10 states, 10 states have (on average 53.5) internal successors, (535), 10 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:13,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:13,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:13,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:13,775 INFO L124 PetriNetUnfolderBase]: 83/156 cut-off events. [2023-08-24 15:12:13,775 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2023-08-24 15:12:13,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 156 events. 83/156 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 443 event pairs, 14 based on Foata normal form. 6/162 useless extension candidates. Maximal degree in co-relation 441. Up to 82 conditions per place. [2023-08-24 15:12:13,777 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 39 selfloop transitions, 17 changer transitions 0/56 dead transitions. [2023-08-24 15:12:13,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 416 flow [2023-08-24 15:12:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:12:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:12:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 560 transitions. [2023-08-24 15:12:13,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2023-08-24 15:12:13,779 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 560 transitions. [2023-08-24 15:12:13,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 560 transitions. [2023-08-24 15:12:13,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:13,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 560 transitions. [2023-08-24 15:12:13,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.0) internal successors, (560), 10 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:13,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 130.0) internal successors, (1430), 11 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:13,783 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 130.0) internal successors, (1430), 11 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:13,783 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 178 flow. Second operand 10 states and 560 transitions. [2023-08-24 15:12:13,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 416 flow [2023-08-24 15:12:13,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 400 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-24 15:12:13,787 INFO L231 Difference]: Finished difference. Result has 49 places, 34 transitions, 269 flow [2023-08-24 15:12:13,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=269, PETRI_PLACES=49, PETRI_TRANSITIONS=34} [2023-08-24 15:12:13,787 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-08-24 15:12:13,788 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 34 transitions, 269 flow [2023-08-24 15:12:13,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.5) internal successors, (535), 10 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:13,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:13,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:13,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:13,993 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 [2023-08-24 15:12:13,993 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:13,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:13,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1965622594, now seen corresponding path program 6 times [2023-08-24 15:12:13,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:13,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598140315] [2023-08-24 15:12:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:13,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:14,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:14,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598140315] [2023-08-24 15:12:14,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598140315] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:14,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748633654] [2023-08-24 15:12:14,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:12:14,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:14,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:14,049 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) [2023-08-24 15:12:14,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 15:12:14,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:12:14,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:14,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 15:12:14,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:14,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:14,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748633654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:14,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:14,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-24 15:12:14,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425480884] [2023-08-24 15:12:14,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:14,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:12:14,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:14,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:12:14,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-24 15:12:14,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:14,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 269 flow. Second operand has 10 states, 10 states have (on average 53.4) internal successors, (534), 10 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:14,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:14,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:14,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:14,280 INFO L124 PetriNetUnfolderBase]: 75/140 cut-off events. [2023-08-24 15:12:14,280 INFO L125 PetriNetUnfolderBase]: For 560/560 co-relation queries the response was YES. [2023-08-24 15:12:14,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 140 events. 75/140 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 372 event pairs, 18 based on Foata normal form. 6/146 useless extension candidates. Maximal degree in co-relation 559. Up to 90 conditions per place. [2023-08-24 15:12:14,282 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 30 selfloop transitions, 15 changer transitions 1/46 dead transitions. [2023-08-24 15:12:14,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 412 flow [2023-08-24 15:12:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 15:12:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 15:12:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 341 transitions. [2023-08-24 15:12:14,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371794871794872 [2023-08-24 15:12:14,284 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 341 transitions. [2023-08-24 15:12:14,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 341 transitions. [2023-08-24 15:12:14,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:14,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 341 transitions. [2023-08-24 15:12:14,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.833333333333336) internal successors, (341), 6 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:14,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:14,286 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:14,286 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 269 flow. Second operand 6 states and 341 transitions. [2023-08-24 15:12:14,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 412 flow [2023-08-24 15:12:14,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 368 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-24 15:12:14,290 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 264 flow [2023-08-24 15:12:14,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-08-24 15:12:14,290 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-08-24 15:12:14,290 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 264 flow [2023-08-24 15:12:14,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.4) internal successors, (534), 10 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:14,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:14,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:14,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:14,496 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 [2023-08-24 15:12:14,497 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:14,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:14,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2145235587, now seen corresponding path program 1 times [2023-08-24 15:12:14,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:14,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935370233] [2023-08-24 15:12:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:14,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:12:14,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:14,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935370233] [2023-08-24 15:12:14,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935370233] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:14,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481555964] [2023-08-24 15:12:14,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:14,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:14,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:14,610 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) [2023-08-24 15:12:14,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 15:12:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:14,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 15:12:14,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:12:14,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:12:14,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481555964] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:14,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:14,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2023-08-24 15:12:14,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291324179] [2023-08-24 15:12:14,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:14,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 15:12:14,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:14,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 15:12:14,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 15:12:14,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 130 [2023-08-24 15:12:14,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:14,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:14,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 130 [2023-08-24 15:12:14,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:14,806 INFO L124 PetriNetUnfolderBase]: 122/230 cut-off events. [2023-08-24 15:12:14,806 INFO L125 PetriNetUnfolderBase]: For 643/655 co-relation queries the response was YES. [2023-08-24 15:12:14,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 230 events. 122/230 cut-off events. For 643/655 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 791 event pairs, 8 based on Foata normal form. 16/244 useless extension candidates. Maximal degree in co-relation 840. Up to 113 conditions per place. [2023-08-24 15:12:14,808 INFO L140 encePairwiseOnDemand]: 126/130 looper letters, 38 selfloop transitions, 11 changer transitions 10/65 dead transitions. [2023-08-24 15:12:14,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 553 flow [2023-08-24 15:12:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 15:12:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 15:12:14,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2023-08-24 15:12:14,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551923076923077 [2023-08-24 15:12:14,809 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 287 transitions. [2023-08-24 15:12:14,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 287 transitions. [2023-08-24 15:12:14,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:14,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 287 transitions. [2023-08-24 15:12:14,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.75) internal successors, (287), 4 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) [2023-08-24 15:12:14,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:14,811 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:14,811 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 264 flow. Second operand 4 states and 287 transitions. [2023-08-24 15:12:14,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 553 flow [2023-08-24 15:12:14,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 450 flow, removed 19 selfloop flow, removed 9 redundant places. [2023-08-24 15:12:14,816 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 303 flow [2023-08-24 15:12:14,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=303, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-08-24 15:12:14,816 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-08-24 15:12:14,817 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 303 flow [2023-08-24 15:12:14,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:14,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:14,817 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:14,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:15,022 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 [2023-08-24 15:12:15,022 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:15,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:15,023 INFO L85 PathProgramCache]: Analyzing trace with hash 705404704, now seen corresponding path program 2 times [2023-08-24 15:12:15,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:15,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496145751] [2023-08-24 15:12:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:15,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:15,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:15,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496145751] [2023-08-24 15:12:15,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496145751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:15,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676256065] [2023-08-24 15:12:15,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:12:15,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:15,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:15,091 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) [2023-08-24 15:12:15,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 15:12:15,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:12:15,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:15,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:12:15,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:15,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:15,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676256065] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:15,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:15,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-24 15:12:15,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145408127] [2023-08-24 15:12:15,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:15,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 15:12:15,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:15,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 15:12:15,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-24 15:12:15,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:15,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 303 flow. Second operand has 11 states, 11 states have (on average 53.27272727272727) internal successors, (586), 11 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:15,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:15,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:15,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:15,427 INFO L124 PetriNetUnfolderBase]: 150/293 cut-off events. [2023-08-24 15:12:15,427 INFO L125 PetriNetUnfolderBase]: For 536/536 co-relation queries the response was YES. [2023-08-24 15:12:15,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 293 events. 150/293 cut-off events. For 536/536 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1138 event pairs, 11 based on Foata normal form. 6/299 useless extension candidates. Maximal degree in co-relation 1060. Up to 95 conditions per place. [2023-08-24 15:12:15,430 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 53 selfloop transitions, 23 changer transitions 10/86 dead transitions. [2023-08-24 15:12:15,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 86 transitions, 692 flow [2023-08-24 15:12:15,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:12:15,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:12:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 570 transitions. [2023-08-24 15:12:15,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43846153846153846 [2023-08-24 15:12:15,432 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 570 transitions. [2023-08-24 15:12:15,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 570 transitions. [2023-08-24 15:12:15,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:15,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 570 transitions. [2023-08-24 15:12:15,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.0) internal successors, (570), 10 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) [2023-08-24 15:12:15,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 130.0) internal successors, (1430), 11 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:15,437 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 130.0) internal successors, (1430), 11 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:15,437 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 303 flow. Second operand 10 states and 570 transitions. [2023-08-24 15:12:15,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 86 transitions, 692 flow [2023-08-24 15:12:15,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 676 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-24 15:12:15,442 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 464 flow [2023-08-24 15:12:15,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=464, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2023-08-24 15:12:15,443 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-08-24 15:12:15,443 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 464 flow [2023-08-24 15:12:15,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.27272727272727) internal successors, (586), 11 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:15,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:15,444 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:15,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:15,649 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 [2023-08-24 15:12:15,649 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:15,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:15,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1190488878, now seen corresponding path program 3 times [2023-08-24 15:12:15,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:15,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201949347] [2023-08-24 15:12:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:15,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:15,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:15,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201949347] [2023-08-24 15:12:15,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201949347] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:15,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079987084] [2023-08-24 15:12:15,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:12:15,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:15,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:15,725 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) [2023-08-24 15:12:15,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 15:12:15,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:12:15,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:15,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:12:15,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:15,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:15,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079987084] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:15,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:15,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-24 15:12:15,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480265088] [2023-08-24 15:12:15,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:15,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 15:12:15,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:15,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 15:12:15,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-24 15:12:15,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:15,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 464 flow. Second operand has 13 states, 13 states have (on average 52.92307692307692) internal successors, (688), 13 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:15,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:15,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:15,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:16,096 INFO L124 PetriNetUnfolderBase]: 184/334 cut-off events. [2023-08-24 15:12:16,097 INFO L125 PetriNetUnfolderBase]: For 1483/1483 co-relation queries the response was YES. [2023-08-24 15:12:16,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1723 conditions, 334 events. 184/334 cut-off events. For 1483/1483 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1212 event pairs, 20 based on Foata normal form. 20/354 useless extension candidates. Maximal degree in co-relation 1467. Up to 125 conditions per place. [2023-08-24 15:12:16,100 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 58 selfloop transitions, 43 changer transitions 1/102 dead transitions. [2023-08-24 15:12:16,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 102 transitions, 1038 flow [2023-08-24 15:12:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 15:12:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 15:12:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 787 transitions. [2023-08-24 15:12:16,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43241758241758244 [2023-08-24 15:12:16,103 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 787 transitions. [2023-08-24 15:12:16,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 787 transitions. [2023-08-24 15:12:16,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:16,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 787 transitions. [2023-08-24 15:12:16,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.214285714285715) internal successors, (787), 14 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:16,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 130.0) internal successors, (1950), 15 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:16,109 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 130.0) internal successors, (1950), 15 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:16,109 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 464 flow. Second operand 14 states and 787 transitions. [2023-08-24 15:12:16,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 102 transitions, 1038 flow [2023-08-24 15:12:16,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 102 transitions, 942 flow, removed 41 selfloop flow, removed 3 redundant places. [2023-08-24 15:12:16,117 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 794 flow [2023-08-24 15:12:16,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=794, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2023-08-24 15:12:16,117 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 57 predicate places. [2023-08-24 15:12:16,118 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 794 flow [2023-08-24 15:12:16,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 52.92307692307692) internal successors, (688), 13 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:16,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:16,118 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:16,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-24 15:12:16,323 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 [2023-08-24 15:12:16,323 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:16,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:16,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1707029492, now seen corresponding path program 4 times [2023-08-24 15:12:16,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:16,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996470882] [2023-08-24 15:12:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:16,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:16,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:16,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996470882] [2023-08-24 15:12:16,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996470882] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:16,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246337847] [2023-08-24 15:12:16,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:12:16,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:16,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:16,396 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) [2023-08-24 15:12:16,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 15:12:16,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:12:16,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:16,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:12:16,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:16,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:16,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246337847] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:16,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:16,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 15:12:16,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547399871] [2023-08-24 15:12:16,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:16,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 15:12:16,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:16,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 15:12:16,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 15:12:16,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:16,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 794 flow. Second operand has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:16,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:16,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:16,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:16,711 INFO L124 PetriNetUnfolderBase]: 248/430 cut-off events. [2023-08-24 15:12:16,711 INFO L125 PetriNetUnfolderBase]: For 3986/3986 co-relation queries the response was YES. [2023-08-24 15:12:16,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2664 conditions, 430 events. 248/430 cut-off events. For 3986/3986 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1607 event pairs, 33 based on Foata normal form. 12/442 useless extension candidates. Maximal degree in co-relation 2417. Up to 208 conditions per place. [2023-08-24 15:12:16,715 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 59 selfloop transitions, 61 changer transitions 1/121 dead transitions. [2023-08-24 15:12:16,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 121 transitions, 1513 flow [2023-08-24 15:12:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:12:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:12:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 725 transitions. [2023-08-24 15:12:16,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289940828402367 [2023-08-24 15:12:16,718 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 725 transitions. [2023-08-24 15:12:16,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 725 transitions. [2023-08-24 15:12:16,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:16,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 725 transitions. [2023-08-24 15:12:16,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 55.76923076923077) internal successors, (725), 13 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:16,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 130.0) internal successors, (1820), 14 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:16,723 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 130.0) internal successors, (1820), 14 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:16,723 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 794 flow. Second operand 13 states and 725 transitions. [2023-08-24 15:12:16,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 121 transitions, 1513 flow [2023-08-24 15:12:16,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 121 transitions, 1365 flow, removed 63 selfloop flow, removed 4 redundant places. [2023-08-24 15:12:16,736 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 1199 flow [2023-08-24 15:12:16,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1199, PETRI_PLACES=89, PETRI_TRANSITIONS=98} [2023-08-24 15:12:16,736 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 69 predicate places. [2023-08-24 15:12:16,737 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 1199 flow [2023-08-24 15:12:16,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:16,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:16,737 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:16,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:16,947 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 [2023-08-24 15:12:16,948 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:16,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:16,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1695763098, now seen corresponding path program 5 times [2023-08-24 15:12:16,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:16,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373459165] [2023-08-24 15:12:16,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:16,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:17,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:17,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373459165] [2023-08-24 15:12:17,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373459165] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:17,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640012410] [2023-08-24 15:12:17,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:12:17,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:17,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:17,014 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) [2023-08-24 15:12:17,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 15:12:17,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:12:17,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:17,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:12:17,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:17,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:17,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640012410] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:17,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:17,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 15:12:17,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516848351] [2023-08-24 15:12:17,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:17,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 15:12:17,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:17,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 15:12:17,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-24 15:12:17,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:17,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 98 transitions, 1199 flow. Second operand has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:17,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:17,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:17,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:17,401 INFO L124 PetriNetUnfolderBase]: 247/455 cut-off events. [2023-08-24 15:12:17,401 INFO L125 PetriNetUnfolderBase]: For 5812/5812 co-relation queries the response was YES. [2023-08-24 15:12:17,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2831 conditions, 455 events. 247/455 cut-off events. For 5812/5812 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1840 event pairs, 24 based on Foata normal form. 26/481 useless extension candidates. Maximal degree in co-relation 2603. Up to 175 conditions per place. [2023-08-24 15:12:17,406 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 58 selfloop transitions, 72 changer transitions 1/131 dead transitions. [2023-08-24 15:12:17,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 131 transitions, 1624 flow [2023-08-24 15:12:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 15:12:17,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 15:12:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 894 transitions. [2023-08-24 15:12:17,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42980769230769234 [2023-08-24 15:12:17,409 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 894 transitions. [2023-08-24 15:12:17,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 894 transitions. [2023-08-24 15:12:17,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:17,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 894 transitions. [2023-08-24 15:12:17,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.875) internal successors, (894), 16 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:17,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 130.0) internal successors, (2210), 17 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:17,415 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 130.0) internal successors, (2210), 17 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:17,415 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 1199 flow. Second operand 16 states and 894 transitions. [2023-08-24 15:12:17,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 131 transitions, 1624 flow [2023-08-24 15:12:17,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 131 transitions, 1394 flow, removed 89 selfloop flow, removed 6 redundant places. [2023-08-24 15:12:17,434 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 1172 flow [2023-08-24 15:12:17,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1172, PETRI_PLACES=101, PETRI_TRANSITIONS=102} [2023-08-24 15:12:17,434 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 81 predicate places. [2023-08-24 15:12:17,434 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 1172 flow [2023-08-24 15:12:17,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:17,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:17,435 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:17,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:17,640 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 [2023-08-24 15:12:17,640 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:17,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:17,641 INFO L85 PathProgramCache]: Analyzing trace with hash 301002758, now seen corresponding path program 6 times [2023-08-24 15:12:17,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:17,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008522425] [2023-08-24 15:12:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:17,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:17,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:17,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008522425] [2023-08-24 15:12:17,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008522425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:17,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222614928] [2023-08-24 15:12:17,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:12:17,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:17,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:17,723 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) [2023-08-24 15:12:17,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 15:12:17,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:12:17,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:17,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:12:17,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:17,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:17,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222614928] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:17,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:17,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 15:12:17,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041557675] [2023-08-24 15:12:17,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:17,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 15:12:17,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:17,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 15:12:17,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-24 15:12:17,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:17,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 102 transitions, 1172 flow. Second operand has 15 states, 15 states have (on average 53.06666666666667) internal successors, (796), 15 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:17,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:17,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:17,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:18,325 INFO L124 PetriNetUnfolderBase]: 396/722 cut-off events. [2023-08-24 15:12:18,326 INFO L125 PetriNetUnfolderBase]: For 5267/5267 co-relation queries the response was YES. [2023-08-24 15:12:18,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4438 conditions, 722 events. 396/722 cut-off events. For 5267/5267 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3385 event pairs, 30 based on Foata normal form. 10/732 useless extension candidates. Maximal degree in co-relation 4132. Up to 237 conditions per place. [2023-08-24 15:12:18,334 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 86 selfloop transitions, 120 changer transitions 1/207 dead transitions. [2023-08-24 15:12:18,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 207 transitions, 2572 flow [2023-08-24 15:12:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 15:12:18,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 15:12:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1276 transitions. [2023-08-24 15:12:18,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42675585284280937 [2023-08-24 15:12:18,338 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1276 transitions. [2023-08-24 15:12:18,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1276 transitions. [2023-08-24 15:12:18,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:18,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1276 transitions. [2023-08-24 15:12:18,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.47826086956522) internal successors, (1276), 23 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:18,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 130.0) internal successors, (3120), 24 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:18,345 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 130.0) internal successors, (3120), 24 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:18,345 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 1172 flow. Second operand 23 states and 1276 transitions. [2023-08-24 15:12:18,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 207 transitions, 2572 flow [2023-08-24 15:12:18,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 207 transitions, 2318 flow, removed 42 selfloop flow, removed 12 redundant places. [2023-08-24 15:12:18,365 INFO L231 Difference]: Finished difference. Result has 117 places, 165 transitions, 2132 flow [2023-08-24 15:12:18,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2132, PETRI_PLACES=117, PETRI_TRANSITIONS=165} [2023-08-24 15:12:18,366 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 97 predicate places. [2023-08-24 15:12:18,366 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 165 transitions, 2132 flow [2023-08-24 15:12:18,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.06666666666667) internal successors, (796), 15 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:18,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:18,367 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:18,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:18,575 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 [2023-08-24 15:12:18,575 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:18,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:18,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1047082884, now seen corresponding path program 7 times [2023-08-24 15:12:18,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:18,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762849574] [2023-08-24 15:12:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:18,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:18,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:18,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762849574] [2023-08-24 15:12:18,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762849574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:18,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346524664] [2023-08-24 15:12:18,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:12:18,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:18,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:18,643 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) [2023-08-24 15:12:18,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 15:12:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:18,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:12:18,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:18,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:18,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346524664] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:18,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:18,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 15:12:18,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697490257] [2023-08-24 15:12:18,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:18,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 15:12:18,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:18,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 15:12:18,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-24 15:12:18,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:18,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 165 transitions, 2132 flow. Second operand has 15 states, 15 states have (on average 52.8) internal successors, (792), 15 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:18,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:18,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:18,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:19,116 INFO L124 PetriNetUnfolderBase]: 438/790 cut-off events. [2023-08-24 15:12:19,117 INFO L125 PetriNetUnfolderBase]: For 7634/7634 co-relation queries the response was YES. [2023-08-24 15:12:19,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5396 conditions, 790 events. 438/790 cut-off events. For 7634/7634 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3703 event pairs, 97 based on Foata normal form. 34/824 useless extension candidates. Maximal degree in co-relation 4979. Up to 620 conditions per place. [2023-08-24 15:12:19,126 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 171 selfloop transitions, 54 changer transitions 0/225 dead transitions. [2023-08-24 15:12:19,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 225 transitions, 3199 flow [2023-08-24 15:12:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 15:12:19,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 15:12:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1008 transitions. [2023-08-24 15:12:19,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2023-08-24 15:12:19,130 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1008 transitions. [2023-08-24 15:12:19,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1008 transitions. [2023-08-24 15:12:19,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:19,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1008 transitions. [2023-08-24 15:12:19,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 56.0) internal successors, (1008), 18 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:19,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 130.0) internal successors, (2470), 19 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:19,137 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 130.0) internal successors, (2470), 19 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:19,137 INFO L175 Difference]: Start difference. First operand has 117 places, 165 transitions, 2132 flow. Second operand 18 states and 1008 transitions. [2023-08-24 15:12:19,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 225 transitions, 3199 flow [2023-08-24 15:12:19,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 225 transitions, 3037 flow, removed 56 selfloop flow, removed 8 redundant places. [2023-08-24 15:12:19,172 INFO L231 Difference]: Finished difference. Result has 138 places, 193 transitions, 2638 flow [2023-08-24 15:12:19,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2638, PETRI_PLACES=138, PETRI_TRANSITIONS=193} [2023-08-24 15:12:19,173 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 118 predicate places. [2023-08-24 15:12:19,173 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 193 transitions, 2638 flow [2023-08-24 15:12:19,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.8) internal successors, (792), 15 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:19,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:19,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:19,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:19,378 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 [2023-08-24 15:12:19,379 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:19,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:19,379 INFO L85 PathProgramCache]: Analyzing trace with hash 499970178, now seen corresponding path program 8 times [2023-08-24 15:12:19,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:19,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647810456] [2023-08-24 15:12:19,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:19,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:19,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:19,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647810456] [2023-08-24 15:12:19,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647810456] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:19,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785908412] [2023-08-24 15:12:19,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:12:19,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:19,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:19,448 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) [2023-08-24 15:12:19,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 15:12:19,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:12:19,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:19,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:12:19,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:19,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:19,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785908412] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:19,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:19,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 15:12:19,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908294266] [2023-08-24 15:12:19,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:19,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 15:12:19,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 15:12:19,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-24 15:12:19,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:19,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 193 transitions, 2638 flow. Second operand has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:19,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:19,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:19,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:19,808 INFO L124 PetriNetUnfolderBase]: 443/793 cut-off events. [2023-08-24 15:12:19,808 INFO L125 PetriNetUnfolderBase]: For 10446/10446 co-relation queries the response was YES. [2023-08-24 15:12:19,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5778 conditions, 793 events. 443/793 cut-off events. For 10446/10446 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3708 event pairs, 100 based on Foata normal form. 6/799 useless extension candidates. Maximal degree in co-relation 5502. Up to 645 conditions per place. [2023-08-24 15:12:19,819 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 160 selfloop transitions, 50 changer transitions 3/213 dead transitions. [2023-08-24 15:12:19,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 213 transitions, 3314 flow [2023-08-24 15:12:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 15:12:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 15:12:19,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 612 transitions. [2023-08-24 15:12:19,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427972027972028 [2023-08-24 15:12:19,820 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 612 transitions. [2023-08-24 15:12:19,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 612 transitions. [2023-08-24 15:12:19,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:19,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 612 transitions. [2023-08-24 15:12:19,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 55.63636363636363) internal successors, (612), 11 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:19,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 130.0) internal successors, (1560), 12 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:19,824 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 130.0) internal successors, (1560), 12 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:19,824 INFO L175 Difference]: Start difference. First operand has 138 places, 193 transitions, 2638 flow. Second operand 11 states and 612 transitions. [2023-08-24 15:12:19,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 213 transitions, 3314 flow [2023-08-24 15:12:19,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 213 transitions, 2920 flow, removed 181 selfloop flow, removed 5 redundant places. [2023-08-24 15:12:19,867 INFO L231 Difference]: Finished difference. Result has 144 places, 195 transitions, 2410 flow [2023-08-24 15:12:19,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=2254, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2410, PETRI_PLACES=144, PETRI_TRANSITIONS=195} [2023-08-24 15:12:19,868 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 124 predicate places. [2023-08-24 15:12:19,868 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 195 transitions, 2410 flow [2023-08-24 15:12:19,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:19,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:19,869 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:19,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:20,073 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 [2023-08-24 15:12:20,074 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:20,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:20,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1757439449, now seen corresponding path program 9 times [2023-08-24 15:12:20,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:20,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580598913] [2023-08-24 15:12:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:20,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:12:20,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:20,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580598913] [2023-08-24 15:12:20,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580598913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:20,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989104879] [2023-08-24 15:12:20,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:12:20,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:20,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:20,184 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) [2023-08-24 15:12:20,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 15:12:20,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:12:20,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:20,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 15:12:20,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:12:20,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:12:20,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989104879] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:20,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:20,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-24 15:12:20,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289267886] [2023-08-24 15:12:20,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:20,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:12:20,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:20,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:12:20,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:12:20,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 130 [2023-08-24 15:12:20,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 195 transitions, 2410 flow. Second operand has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 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) [2023-08-24 15:12:20,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:20,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 130 [2023-08-24 15:12:20,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:20,550 INFO L124 PetriNetUnfolderBase]: 654/1167 cut-off events. [2023-08-24 15:12:20,550 INFO L125 PetriNetUnfolderBase]: For 14409/14421 co-relation queries the response was YES. [2023-08-24 15:12:20,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8257 conditions, 1167 events. 654/1167 cut-off events. For 14409/14421 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6098 event pairs, 32 based on Foata normal form. 16/1180 useless extension candidates. Maximal degree in co-relation 7813. Up to 620 conditions per place. [2023-08-24 15:12:20,565 INFO L140 encePairwiseOnDemand]: 126/130 looper letters, 192 selfloop transitions, 81 changer transitions 47/327 dead transitions. [2023-08-24 15:12:20,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 327 transitions, 4619 flow [2023-08-24 15:12:20,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:12:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:12:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 361 transitions. [2023-08-24 15:12:20,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5553846153846154 [2023-08-24 15:12:20,567 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 361 transitions. [2023-08-24 15:12:20,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 361 transitions. [2023-08-24 15:12:20,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:20,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 361 transitions. [2023-08-24 15:12:20,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:20,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:20,569 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:20,569 INFO L175 Difference]: Start difference. First operand has 144 places, 195 transitions, 2410 flow. Second operand 5 states and 361 transitions. [2023-08-24 15:12:20,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 327 transitions, 4619 flow [2023-08-24 15:12:20,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 327 transitions, 4524 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-24 15:12:20,627 INFO L231 Difference]: Finished difference. Result has 146 places, 241 transitions, 3234 flow [2023-08-24 15:12:20,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3234, PETRI_PLACES=146, PETRI_TRANSITIONS=241} [2023-08-24 15:12:20,629 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 126 predicate places. [2023-08-24 15:12:20,629 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 241 transitions, 3234 flow [2023-08-24 15:12:20,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 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) [2023-08-24 15:12:20,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:20,629 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:20,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:20,834 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 [2023-08-24 15:12:20,835 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:20,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:20,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1059430198, now seen corresponding path program 10 times [2023-08-24 15:12:20,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:20,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448192831] [2023-08-24 15:12:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:20,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:20,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:20,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448192831] [2023-08-24 15:12:20,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448192831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:20,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966064601] [2023-08-24 15:12:20,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:12:20,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:20,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:20,931 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) [2023-08-24 15:12:20,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 15:12:21,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:12:21,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:21,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:12:21,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:21,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:21,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966064601] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:21,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:21,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-24 15:12:21,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833666341] [2023-08-24 15:12:21,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:21,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 15:12:21,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:21,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 15:12:21,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-24 15:12:21,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:21,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 241 transitions, 3234 flow. Second operand has 14 states, 14 states have (on average 52.857142857142854) internal successors, (740), 14 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:21,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:21,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:21,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:21,486 INFO L124 PetriNetUnfolderBase]: 775/1418 cut-off events. [2023-08-24 15:12:21,486 INFO L125 PetriNetUnfolderBase]: For 19974/19974 co-relation queries the response was YES. [2023-08-24 15:12:21,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10724 conditions, 1418 events. 775/1418 cut-off events. For 19974/19974 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7890 event pairs, 31 based on Foata normal form. 10/1428 useless extension candidates. Maximal degree in co-relation 10128. Up to 564 conditions per place. [2023-08-24 15:12:21,506 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 214 selfloop transitions, 129 changer transitions 21/364 dead transitions. [2023-08-24 15:12:21,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 364 transitions, 5482 flow [2023-08-24 15:12:21,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:12:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:12:21,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 737 transitions. [2023-08-24 15:12:21,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43609467455621304 [2023-08-24 15:12:21,508 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 737 transitions. [2023-08-24 15:12:21,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 737 transitions. [2023-08-24 15:12:21,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:21,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 737 transitions. [2023-08-24 15:12:21,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 56.69230769230769) internal successors, (737), 13 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:21,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 130.0) internal successors, (1820), 14 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:21,513 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 130.0) internal successors, (1820), 14 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:21,513 INFO L175 Difference]: Start difference. First operand has 146 places, 241 transitions, 3234 flow. Second operand 13 states and 737 transitions. [2023-08-24 15:12:21,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 364 transitions, 5482 flow [2023-08-24 15:12:21,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 364 transitions, 5388 flow, removed 47 selfloop flow, removed 0 redundant places. [2023-08-24 15:12:21,604 INFO L231 Difference]: Finished difference. Result has 166 places, 303 transitions, 4631 flow [2023-08-24 15:12:21,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=3158, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4631, PETRI_PLACES=166, PETRI_TRANSITIONS=303} [2023-08-24 15:12:21,605 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 146 predicate places. [2023-08-24 15:12:21,605 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 303 transitions, 4631 flow [2023-08-24 15:12:21,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.857142857142854) internal successors, (740), 14 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:21,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:21,606 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:21,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:21,811 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 [2023-08-24 15:12:21,811 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:21,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:21,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2111509370, now seen corresponding path program 11 times [2023-08-24 15:12:21,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:21,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232618204] [2023-08-24 15:12:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:21,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:21,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:21,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232618204] [2023-08-24 15:12:21,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232618204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:21,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464765390] [2023-08-24 15:12:21,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:12:21,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:21,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:21,924 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) [2023-08-24 15:12:21,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 15:12:21,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:12:21,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:21,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:12:21,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:22,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:22,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464765390] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:22,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:22,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-24 15:12:22,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510118728] [2023-08-24 15:12:22,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:22,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 15:12:22,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:22,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 15:12:22,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-24 15:12:22,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:22,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 303 transitions, 4631 flow. Second operand has 16 states, 16 states have (on average 52.75) internal successors, (844), 16 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:22,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:22,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:22,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:22,683 INFO L124 PetriNetUnfolderBase]: 841/1502 cut-off events. [2023-08-24 15:12:22,684 INFO L125 PetriNetUnfolderBase]: For 24502/24502 co-relation queries the response was YES. [2023-08-24 15:12:22,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12260 conditions, 1502 events. 841/1502 cut-off events. For 24502/24502 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8169 event pairs, 79 based on Foata normal form. 16/1518 useless extension candidates. Maximal degree in co-relation 11775. Up to 557 conditions per place. [2023-08-24 15:12:22,713 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 223 selfloop transitions, 166 changer transitions 0/389 dead transitions. [2023-08-24 15:12:22,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 389 transitions, 6413 flow [2023-08-24 15:12:22,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 15:12:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 15:12:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1061 transitions. [2023-08-24 15:12:22,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42955465587044533 [2023-08-24 15:12:22,716 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1061 transitions. [2023-08-24 15:12:22,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1061 transitions. [2023-08-24 15:12:22,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:22,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1061 transitions. [2023-08-24 15:12:22,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.8421052631579) internal successors, (1061), 19 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:22,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 130.0) internal successors, (2600), 20 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:22,721 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 130.0) internal successors, (2600), 20 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:22,721 INFO L175 Difference]: Start difference. First operand has 166 places, 303 transitions, 4631 flow. Second operand 19 states and 1061 transitions. [2023-08-24 15:12:22,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 389 transitions, 6413 flow [2023-08-24 15:12:22,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 389 transitions, 6280 flow, removed 58 selfloop flow, removed 3 redundant places. [2023-08-24 15:12:22,830 INFO L231 Difference]: Finished difference. Result has 189 places, 342 transitions, 5685 flow [2023-08-24 15:12:22,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=4532, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5685, PETRI_PLACES=189, PETRI_TRANSITIONS=342} [2023-08-24 15:12:22,831 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 169 predicate places. [2023-08-24 15:12:22,831 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 342 transitions, 5685 flow [2023-08-24 15:12:22,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 52.75) internal successors, (844), 16 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:22,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:22,832 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:22,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:23,037 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 [2023-08-24 15:12:23,037 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:23,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:23,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1640336812, now seen corresponding path program 12 times [2023-08-24 15:12:23,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:23,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738973068] [2023-08-24 15:12:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:23,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:23,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:23,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738973068] [2023-08-24 15:12:23,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738973068] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:23,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661195131] [2023-08-24 15:12:23,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:12:23,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:23,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:23,125 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) [2023-08-24 15:12:23,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 15:12:23,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 15:12:23,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:23,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:12:23,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:23,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:23,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661195131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:23,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:23,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 15:12:23,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166623080] [2023-08-24 15:12:23,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:23,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 15:12:23,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:23,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 15:12:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-08-24 15:12:23,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:23,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 342 transitions, 5685 flow. Second operand has 15 states, 15 states have (on average 52.8) internal successors, (792), 15 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:23,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:23,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:23,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:23,926 INFO L124 PetriNetUnfolderBase]: 979/1708 cut-off events. [2023-08-24 15:12:23,926 INFO L125 PetriNetUnfolderBase]: For 32569/32569 co-relation queries the response was YES. [2023-08-24 15:12:23,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15388 conditions, 1708 events. 979/1708 cut-off events. For 32569/32569 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 9340 event pairs, 137 based on Foata normal form. 18/1726 useless extension candidates. Maximal degree in co-relation 14817. Up to 885 conditions per place. [2023-08-24 15:12:23,953 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 174 selfloop transitions, 257 changer transitions 7/438 dead transitions. [2023-08-24 15:12:23,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 438 transitions, 8318 flow [2023-08-24 15:12:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 15:12:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 15:12:23,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1056 transitions. [2023-08-24 15:12:23,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42753036437246966 [2023-08-24 15:12:23,956 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1056 transitions. [2023-08-24 15:12:23,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1056 transitions. [2023-08-24 15:12:23,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:23,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1056 transitions. [2023-08-24 15:12:23,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.578947368421055) internal successors, (1056), 19 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:23,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 130.0) internal successors, (2600), 20 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:23,962 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 130.0) internal successors, (2600), 20 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:23,962 INFO L175 Difference]: Start difference. First operand has 189 places, 342 transitions, 5685 flow. Second operand 19 states and 1056 transitions. [2023-08-24 15:12:23,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 438 transitions, 8318 flow [2023-08-24 15:12:24,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 438 transitions, 8059 flow, removed 105 selfloop flow, removed 5 redundant places. [2023-08-24 15:12:24,116 INFO L231 Difference]: Finished difference. Result has 208 places, 399 transitions, 7464 flow [2023-08-24 15:12:24,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=5478, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7464, PETRI_PLACES=208, PETRI_TRANSITIONS=399} [2023-08-24 15:12:24,117 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 188 predicate places. [2023-08-24 15:12:24,117 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 399 transitions, 7464 flow [2023-08-24 15:12:24,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.8) internal successors, (792), 15 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:24,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:24,118 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:24,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:24,318 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 [2023-08-24 15:12:24,318 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:24,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:24,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1541102426, now seen corresponding path program 13 times [2023-08-24 15:12:24,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:24,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539904796] [2023-08-24 15:12:24,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:24,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:24,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:24,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539904796] [2023-08-24 15:12:24,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539904796] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:24,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785674042] [2023-08-24 15:12:24,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:12:24,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:24,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:24,404 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) [2023-08-24 15:12:24,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 15:12:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:24,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:12:24,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:24,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:24,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785674042] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:24,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:24,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 15:12:24,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650885294] [2023-08-24 15:12:24,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:24,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 15:12:24,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:24,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 15:12:24,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-08-24 15:12:24,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:24,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 399 transitions, 7464 flow. Second operand has 15 states, 15 states have (on average 53.06666666666667) internal successors, (796), 15 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:24,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:24,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:24,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:25,323 INFO L124 PetriNetUnfolderBase]: 994/1765 cut-off events. [2023-08-24 15:12:25,324 INFO L125 PetriNetUnfolderBase]: For 43546/43546 co-relation queries the response was YES. [2023-08-24 15:12:25,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16661 conditions, 1765 events. 994/1765 cut-off events. For 43546/43546 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 9831 event pairs, 66 based on Foata normal form. 42/1807 useless extension candidates. Maximal degree in co-relation 16093. Up to 622 conditions per place. [2023-08-24 15:12:25,348 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 136 selfloop transitions, 317 changer transitions 1/454 dead transitions. [2023-08-24 15:12:25,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 454 transitions, 9027 flow [2023-08-24 15:12:25,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 15:12:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 15:12:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1334 transitions. [2023-08-24 15:12:25,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42756410256410254 [2023-08-24 15:12:25,351 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1334 transitions. [2023-08-24 15:12:25,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1334 transitions. [2023-08-24 15:12:25,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:25,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1334 transitions. [2023-08-24 15:12:25,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.583333333333336) internal successors, (1334), 24 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:25,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 130.0) internal successors, (3250), 25 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:25,364 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 130.0) internal successors, (3250), 25 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:25,364 INFO L175 Difference]: Start difference. First operand has 208 places, 399 transitions, 7464 flow. Second operand 24 states and 1334 transitions. [2023-08-24 15:12:25,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 454 transitions, 9027 flow [2023-08-24 15:12:25,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 454 transitions, 7919 flow, removed 347 selfloop flow, removed 14 redundant places. [2023-08-24 15:12:25,510 INFO L231 Difference]: Finished difference. Result has 218 places, 412 transitions, 7380 flow [2023-08-24 15:12:25,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=6318, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7380, PETRI_PLACES=218, PETRI_TRANSITIONS=412} [2023-08-24 15:12:25,511 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 198 predicate places. [2023-08-24 15:12:25,511 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 412 transitions, 7380 flow [2023-08-24 15:12:25,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.06666666666667) internal successors, (796), 15 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:25,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:25,511 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:25,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:25,716 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 [2023-08-24 15:12:25,717 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:25,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1098685802, now seen corresponding path program 14 times [2023-08-24 15:12:25,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:25,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057790243] [2023-08-24 15:12:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:25,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:25,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:25,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057790243] [2023-08-24 15:12:25,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057790243] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:25,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299518059] [2023-08-24 15:12:25,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:12:25,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:25,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:25,830 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) [2023-08-24 15:12:25,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 15:12:25,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:12:25,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:25,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:12:25,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:25,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:26,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299518059] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:26,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:26,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 15:12:26,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83364161] [2023-08-24 15:12:26,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:26,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 15:12:26,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 15:12:26,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-24 15:12:26,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:26,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 412 transitions, 7380 flow. Second operand has 15 states, 15 states have (on average 53.06666666666667) internal successors, (796), 15 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:26,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:26,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:26,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:26,728 INFO L124 PetriNetUnfolderBase]: 1101/1972 cut-off events. [2023-08-24 15:12:26,728 INFO L125 PetriNetUnfolderBase]: For 43172/43172 co-relation queries the response was YES. [2023-08-24 15:12:26,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17838 conditions, 1972 events. 1101/1972 cut-off events. For 43172/43172 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 11430 event pairs, 79 based on Foata normal form. 26/1998 useless extension candidates. Maximal degree in co-relation 17237. Up to 583 conditions per place. [2023-08-24 15:12:26,755 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 224 selfloop transitions, 271 changer transitions 6/501 dead transitions. [2023-08-24 15:12:26,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 501 transitions, 9584 flow [2023-08-24 15:12:26,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 15:12:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 15:12:26,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1169 transitions. [2023-08-24 15:12:26,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4282051282051282 [2023-08-24 15:12:26,758 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1169 transitions. [2023-08-24 15:12:26,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1169 transitions. [2023-08-24 15:12:26,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:26,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1169 transitions. [2023-08-24 15:12:26,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.666666666666664) internal successors, (1169), 21 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:26,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 130.0) internal successors, (2860), 22 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:26,764 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 130.0) internal successors, (2860), 22 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:26,764 INFO L175 Difference]: Start difference. First operand has 218 places, 412 transitions, 7380 flow. Second operand 21 states and 1169 transitions. [2023-08-24 15:12:26,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 501 transitions, 9584 flow [2023-08-24 15:12:26,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 501 transitions, 8900 flow, removed 83 selfloop flow, removed 21 redundant places. [2023-08-24 15:12:26,976 INFO L231 Difference]: Finished difference. Result has 223 places, 450 transitions, 8259 flow [2023-08-24 15:12:26,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=6790, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8259, PETRI_PLACES=223, PETRI_TRANSITIONS=450} [2023-08-24 15:12:26,977 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 203 predicate places. [2023-08-24 15:12:26,977 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 450 transitions, 8259 flow [2023-08-24 15:12:26,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.06666666666667) internal successors, (796), 15 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:26,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:26,979 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:26,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:27,183 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 [2023-08-24 15:12:27,184 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:27,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:27,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1999442078, now seen corresponding path program 15 times [2023-08-24 15:12:27,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:27,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738143781] [2023-08-24 15:12:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:27,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:27,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:27,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738143781] [2023-08-24 15:12:27,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738143781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:27,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413778479] [2023-08-24 15:12:27,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:12:27,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:27,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:27,273 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) [2023-08-24 15:12:27,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 15:12:27,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:12:27,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:27,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:12:27,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:27,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:27,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413778479] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:27,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:27,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-24 15:12:27,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976789095] [2023-08-24 15:12:27,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:27,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:12:27,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:27,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:12:27,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:12:27,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:27,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 450 transitions, 8259 flow. Second operand has 18 states, 18 states have (on average 52.94444444444444) internal successors, (953), 18 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:27,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:27,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:27,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:28,282 INFO L124 PetriNetUnfolderBase]: 1335/2402 cut-off events. [2023-08-24 15:12:28,282 INFO L125 PetriNetUnfolderBase]: For 54631/54631 co-relation queries the response was YES. [2023-08-24 15:12:28,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22428 conditions, 2402 events. 1335/2402 cut-off events. For 54631/54631 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 14661 event pairs, 101 based on Foata normal form. 12/2414 useless extension candidates. Maximal degree in co-relation 21791. Up to 747 conditions per place. [2023-08-24 15:12:28,312 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 284 selfloop transitions, 329 changer transitions 0/613 dead transitions. [2023-08-24 15:12:28,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 613 transitions, 12091 flow [2023-08-24 15:12:28,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 15:12:28,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 15:12:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1609 transitions. [2023-08-24 15:12:28,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42679045092838197 [2023-08-24 15:12:28,316 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1609 transitions. [2023-08-24 15:12:28,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1609 transitions. [2023-08-24 15:12:28,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:28,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1609 transitions. [2023-08-24 15:12:28,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.48275862068966) internal successors, (1609), 29 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:28,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 130.0) internal successors, (3900), 30 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:28,323 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 130.0) internal successors, (3900), 30 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:28,323 INFO L175 Difference]: Start difference. First operand has 223 places, 450 transitions, 8259 flow. Second operand 29 states and 1609 transitions. [2023-08-24 15:12:28,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 613 transitions, 12091 flow [2023-08-24 15:12:28,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 613 transitions, 11799 flow, removed 89 selfloop flow, removed 9 redundant places. [2023-08-24 15:12:28,588 INFO L231 Difference]: Finished difference. Result has 247 places, 552 transitions, 10989 flow [2023-08-24 15:12:28,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=8064, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10989, PETRI_PLACES=247, PETRI_TRANSITIONS=552} [2023-08-24 15:12:28,589 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-08-24 15:12:28,589 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 552 transitions, 10989 flow [2023-08-24 15:12:28,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.94444444444444) internal successors, (953), 18 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:28,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:28,589 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:28,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:28,790 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 [2023-08-24 15:12:28,790 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:28,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:28,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1545090306, now seen corresponding path program 16 times [2023-08-24 15:12:28,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:28,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463819030] [2023-08-24 15:12:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:28,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:28,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:28,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463819030] [2023-08-24 15:12:28,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463819030] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:28,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167229702] [2023-08-24 15:12:28,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:12:28,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:28,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:28,869 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) [2023-08-24 15:12:28,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 15:12:28,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:12:28,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:28,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:12:28,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:29,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:29,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167229702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:29,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:29,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-08-24 15:12:29,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555604038] [2023-08-24 15:12:29,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:29,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 15:12:29,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:29,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 15:12:29,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-24 15:12:29,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:29,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 552 transitions, 10989 flow. Second operand has 15 states, 15 states have (on average 53.13333333333333) internal successors, (797), 15 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:29,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:29,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:29,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:30,007 INFO L124 PetriNetUnfolderBase]: 1659/2972 cut-off events. [2023-08-24 15:12:30,007 INFO L125 PetriNetUnfolderBase]: For 72580/72580 co-relation queries the response was YES. [2023-08-24 15:12:30,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28789 conditions, 2972 events. 1659/2972 cut-off events. For 72580/72580 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 18897 event pairs, 68 based on Foata normal form. 34/3006 useless extension candidates. Maximal degree in co-relation 28105. Up to 799 conditions per place. [2023-08-24 15:12:30,045 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 180 selfloop transitions, 558 changer transitions 9/747 dead transitions. [2023-08-24 15:12:30,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 747 transitions, 15856 flow [2023-08-24 15:12:30,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 15:12:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 15:12:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1441 transitions. [2023-08-24 15:12:30,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42633136094674556 [2023-08-24 15:12:30,048 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1441 transitions. [2023-08-24 15:12:30,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1441 transitions. [2023-08-24 15:12:30,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:30,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1441 transitions. [2023-08-24 15:12:30,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.42307692307692) internal successors, (1441), 26 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:30,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 130.0) internal successors, (3510), 27 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:30,054 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 130.0) internal successors, (3510), 27 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:30,055 INFO L175 Difference]: Start difference. First operand has 247 places, 552 transitions, 10989 flow. Second operand 26 states and 1441 transitions. [2023-08-24 15:12:30,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 747 transitions, 15856 flow [2023-08-24 15:12:30,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 747 transitions, 15497 flow, removed 146 selfloop flow, removed 6 redundant places. [2023-08-24 15:12:30,470 INFO L231 Difference]: Finished difference. Result has 276 places, 693 transitions, 15230 flow [2023-08-24 15:12:30,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=10682, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=15230, PETRI_PLACES=276, PETRI_TRANSITIONS=693} [2023-08-24 15:12:30,471 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2023-08-24 15:12:30,471 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 693 transitions, 15230 flow [2023-08-24 15:12:30,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.13333333333333) internal successors, (797), 15 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:30,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:30,472 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:30,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:30,676 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 [2023-08-24 15:12:30,677 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:30,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:30,677 INFO L85 PathProgramCache]: Analyzing trace with hash -181271078, now seen corresponding path program 17 times [2023-08-24 15:12:30,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:30,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189347602] [2023-08-24 15:12:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:30,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:30,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:30,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189347602] [2023-08-24 15:12:30,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189347602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:30,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586990272] [2023-08-24 15:12:30,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:12:30,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:30,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:30,769 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) [2023-08-24 15:12:30,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 15:12:30,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:12:30,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:30,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:12:30,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:30,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:30,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586990272] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:30,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:30,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-24 15:12:30,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425980069] [2023-08-24 15:12:30,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:30,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:12:30,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:30,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:12:30,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:12:30,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:30,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 693 transitions, 15230 flow. Second operand has 20 states, 20 states have (on average 52.8) internal successors, (1056), 20 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:30,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:30,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:30,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:32,450 INFO L124 PetriNetUnfolderBase]: 2423/4340 cut-off events. [2023-08-24 15:12:32,450 INFO L125 PetriNetUnfolderBase]: For 123418/123418 co-relation queries the response was YES. [2023-08-24 15:12:32,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46052 conditions, 4340 events. 2423/4340 cut-off events. For 123418/123418 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 29719 event pairs, 139 based on Foata normal form. 32/4372 useless extension candidates. Maximal degree in co-relation 45319. Up to 1133 conditions per place. [2023-08-24 15:12:32,504 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 331 selfloop transitions, 753 changer transitions 10/1094 dead transitions. [2023-08-24 15:12:32,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1094 transitions, 25878 flow [2023-08-24 15:12:32,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 15:12:32,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 15:12:32,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1993 transitions. [2023-08-24 15:12:32,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42585470085470084 [2023-08-24 15:12:32,508 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1993 transitions. [2023-08-24 15:12:32,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1993 transitions. [2023-08-24 15:12:32,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:32,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1993 transitions. [2023-08-24 15:12:32,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.361111111111114) internal successors, (1993), 36 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:32,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 130.0) internal successors, (4810), 37 states have internal predecessors, (4810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:32,517 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 130.0) internal successors, (4810), 37 states have internal predecessors, (4810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:32,517 INFO L175 Difference]: Start difference. First operand has 276 places, 693 transitions, 15230 flow. Second operand 36 states and 1993 transitions. [2023-08-24 15:12:32,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1094 transitions, 25878 flow [2023-08-24 15:12:33,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1094 transitions, 24762 flow, removed 397 selfloop flow, removed 11 redundant places. [2023-08-24 15:12:33,383 INFO L231 Difference]: Finished difference. Result has 312 places, 1021 transitions, 24604 flow [2023-08-24 15:12:33,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=14478, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=24604, PETRI_PLACES=312, PETRI_TRANSITIONS=1021} [2023-08-24 15:12:33,384 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2023-08-24 15:12:33,385 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 1021 transitions, 24604 flow [2023-08-24 15:12:33,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.8) internal successors, (1056), 20 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:33,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:33,385 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:33,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:33,585 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 [2023-08-24 15:12:33,586 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:33,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:33,586 INFO L85 PathProgramCache]: Analyzing trace with hash 740432096, now seen corresponding path program 18 times [2023-08-24 15:12:33,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:33,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70366907] [2023-08-24 15:12:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:33,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:33,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:33,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70366907] [2023-08-24 15:12:33,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70366907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:33,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852397709] [2023-08-24 15:12:33,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:12:33,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:33,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:33,676 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) [2023-08-24 15:12:33,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 15:12:33,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 15:12:33,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:33,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:12:33,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:33,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:33,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852397709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:33,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:33,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-24 15:12:33,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172607024] [2023-08-24 15:12:33,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:33,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:12:33,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:33,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:12:33,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:12:33,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:33,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 1021 transitions, 24604 flow. Second operand has 20 states, 20 states have (on average 52.6) internal successors, (1052), 20 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:33,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:33,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:33,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:35,716 INFO L124 PetriNetUnfolderBase]: 2490/4449 cut-off events. [2023-08-24 15:12:35,717 INFO L125 PetriNetUnfolderBase]: For 153069/153069 co-relation queries the response was YES. [2023-08-24 15:12:35,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50191 conditions, 4449 events. 2490/4449 cut-off events. For 153069/153069 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 30261 event pairs, 689 based on Foata normal form. 60/4509 useless extension candidates. Maximal degree in co-relation 49363. Up to 3951 conditions per place. [2023-08-24 15:12:35,774 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 984 selfloop transitions, 141 changer transitions 11/1136 dead transitions. [2023-08-24 15:12:35,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1136 transitions, 29140 flow [2023-08-24 15:12:35,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 15:12:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 15:12:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1672 transitions. [2023-08-24 15:12:35,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4287179487179487 [2023-08-24 15:12:35,779 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1672 transitions. [2023-08-24 15:12:35,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1672 transitions. [2023-08-24 15:12:35,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:35,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1672 transitions. [2023-08-24 15:12:35,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.733333333333334) internal successors, (1672), 30 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:35,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 130.0) internal successors, (4030), 31 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:35,787 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 130.0) internal successors, (4030), 31 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:35,787 INFO L175 Difference]: Start difference. First operand has 312 places, 1021 transitions, 24604 flow. Second operand 30 states and 1672 transitions. [2023-08-24 15:12:35,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1136 transitions, 29140 flow [2023-08-24 15:12:36,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1136 transitions, 28514 flow, removed 267 selfloop flow, removed 10 redundant places. [2023-08-24 15:12:36,852 INFO L231 Difference]: Finished difference. Result has 348 places, 1077 transitions, 26388 flow [2023-08-24 15:12:36,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=23998, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=926, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=26388, PETRI_PLACES=348, PETRI_TRANSITIONS=1077} [2023-08-24 15:12:36,854 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 328 predicate places. [2023-08-24 15:12:36,854 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 1077 transitions, 26388 flow [2023-08-24 15:12:36,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.6) internal successors, (1052), 20 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:36,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:36,854 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:36,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:37,054 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 [2023-08-24 15:12:37,055 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:37,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:37,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1197540378, now seen corresponding path program 19 times [2023-08-24 15:12:37,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:37,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62964917] [2023-08-24 15:12:37,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:37,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:37,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:37,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62964917] [2023-08-24 15:12:37,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62964917] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:37,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552095897] [2023-08-24 15:12:37,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:12:37,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:37,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:37,143 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) [2023-08-24 15:12:37,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 15:12:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:37,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:12:37,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:37,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:37,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552095897] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:37,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:37,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-24 15:12:37,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783127738] [2023-08-24 15:12:37,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:37,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 15:12:37,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:37,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 15:12:37,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-08-24 15:12:37,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:37,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 1077 transitions, 26388 flow. Second operand has 17 states, 17 states have (on average 52.8235294117647) internal successors, (898), 17 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:37,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:37,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:37,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:38,991 INFO L124 PetriNetUnfolderBase]: 2496/4434 cut-off events. [2023-08-24 15:12:38,992 INFO L125 PetriNetUnfolderBase]: For 147896/147896 co-relation queries the response was YES. [2023-08-24 15:12:39,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49359 conditions, 4434 events. 2496/4434 cut-off events. For 147896/147896 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 29876 event pairs, 710 based on Foata normal form. 6/4440 useless extension candidates. Maximal degree in co-relation 48655. Up to 4069 conditions per place. [2023-08-24 15:12:39,048 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 975 selfloop transitions, 135 changer transitions 5/1115 dead transitions. [2023-08-24 15:12:39,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1115 transitions, 29231 flow [2023-08-24 15:12:39,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 15:12:39,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 15:12:39,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 886 transitions. [2023-08-24 15:12:39,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42596153846153845 [2023-08-24 15:12:39,051 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 886 transitions. [2023-08-24 15:12:39,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 886 transitions. [2023-08-24 15:12:39,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:39,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 886 transitions. [2023-08-24 15:12:39,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.375) internal successors, (886), 16 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:39,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 130.0) internal successors, (2210), 17 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:39,055 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 130.0) internal successors, (2210), 17 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:39,055 INFO L175 Difference]: Start difference. First operand has 348 places, 1077 transitions, 26388 flow. Second operand 16 states and 886 transitions. [2023-08-24 15:12:39,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1115 transitions, 29231 flow [2023-08-24 15:12:40,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1115 transitions, 27604 flow, removed 790 selfloop flow, removed 6 redundant places. [2023-08-24 15:12:40,238 INFO L231 Difference]: Finished difference. Result has 357 places, 1090 transitions, 25468 flow [2023-08-24 15:12:40,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=24885, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=25468, PETRI_PLACES=357, PETRI_TRANSITIONS=1090} [2023-08-24 15:12:40,239 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 337 predicate places. [2023-08-24 15:12:40,240 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 1090 transitions, 25468 flow [2023-08-24 15:12:40,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 52.8235294117647) internal successors, (898), 17 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:40,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:40,240 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:40,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:40,445 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 [2023-08-24 15:12:40,445 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:40,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:40,446 INFO L85 PathProgramCache]: Analyzing trace with hash -268277087, now seen corresponding path program 20 times [2023-08-24 15:12:40,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:40,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5073594] [2023-08-24 15:12:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:40,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:12:40,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:40,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5073594] [2023-08-24 15:12:40,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5073594] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:40,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313634634] [2023-08-24 15:12:40,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:12:40,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:40,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:40,549 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) [2023-08-24 15:12:40,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 15:12:40,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:12:40,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:40,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 15:12:40,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:12:40,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:12:40,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313634634] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:40,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:40,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-08-24 15:12:40,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352881861] [2023-08-24 15:12:40,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:40,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 15:12:40,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:40,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 15:12:40,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 15:12:40,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 130 [2023-08-24 15:12:40,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 1090 transitions, 25468 flow. Second operand has 6 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:40,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:40,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 130 [2023-08-24 15:12:40,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:42,719 INFO L124 PetriNetUnfolderBase]: 3355/5920 cut-off events. [2023-08-24 15:12:42,719 INFO L125 PetriNetUnfolderBase]: For 169814/169826 co-relation queries the response was YES. [2023-08-24 15:12:42,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62950 conditions, 5920 events. 3355/5920 cut-off events. For 169814/169826 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 41914 event pairs, 147 based on Foata normal form. 16/5934 useless extension candidates. Maximal degree in co-relation 61812. Up to 3546 conditions per place. [2023-08-24 15:12:42,800 INFO L140 encePairwiseOnDemand]: 126/130 looper letters, 994 selfloop transitions, 448 changer transitions 133/1583 dead transitions. [2023-08-24 15:12:42,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1583 transitions, 39564 flow [2023-08-24 15:12:42,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 15:12:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 15:12:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 435 transitions. [2023-08-24 15:12:42,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2023-08-24 15:12:42,806 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 435 transitions. [2023-08-24 15:12:42,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 435 transitions. [2023-08-24 15:12:42,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:42,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 435 transitions. [2023-08-24 15:12:42,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.5) internal successors, (435), 6 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:42,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:42,808 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:42,808 INFO L175 Difference]: Start difference. First operand has 357 places, 1090 transitions, 25468 flow. Second operand 6 states and 435 transitions. [2023-08-24 15:12:42,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1583 transitions, 39564 flow [2023-08-24 15:12:44,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1583 transitions, 39238 flow, removed 71 selfloop flow, removed 9 redundant places. [2023-08-24 15:12:44,360 INFO L231 Difference]: Finished difference. Result has 356 places, 1320 transitions, 31349 flow [2023-08-24 15:12:44,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=25266, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=31349, PETRI_PLACES=356, PETRI_TRANSITIONS=1320} [2023-08-24 15:12:44,361 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 336 predicate places. [2023-08-24 15:12:44,361 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 1320 transitions, 31349 flow [2023-08-24 15:12:44,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:44,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:44,361 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:44,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:44,566 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 [2023-08-24 15:12:44,566 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:44,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:44,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1769020758, now seen corresponding path program 21 times [2023-08-24 15:12:44,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:44,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870447453] [2023-08-24 15:12:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:44,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:44,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:44,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870447453] [2023-08-24 15:12:44,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870447453] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:44,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922423257] [2023-08-24 15:12:44,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:12:44,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:44,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:44,669 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) [2023-08-24 15:12:44,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 15:12:44,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 15:12:44,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:44,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:12:44,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:44,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:44,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922423257] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:44,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:44,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-08-24 15:12:44,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769123465] [2023-08-24 15:12:44,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:44,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 15:12:44,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:44,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 15:12:44,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-08-24 15:12:44,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:44,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 1320 transitions, 31349 flow. Second operand has 17 states, 17 states have (on average 52.705882352941174) internal successors, (896), 17 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:44,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:44,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:44,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:47,871 INFO L124 PetriNetUnfolderBase]: 4014/7171 cut-off events. [2023-08-24 15:12:47,871 INFO L125 PetriNetUnfolderBase]: For 217642/217642 co-relation queries the response was YES. [2023-08-24 15:12:47,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80496 conditions, 7171 events. 4014/7171 cut-off events. For 217642/217642 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 52780 event pairs, 149 based on Foata normal form. 16/7187 useless extension candidates. Maximal degree in co-relation 79074. Up to 3288 conditions per place. [2023-08-24 15:12:47,976 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 1092 selfloop transitions, 639 changer transitions 33/1764 dead transitions. [2023-08-24 15:12:47,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1764 transitions, 45786 flow [2023-08-24 15:12:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 15:12:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 15:12:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 905 transitions. [2023-08-24 15:12:47,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43509615384615385 [2023-08-24 15:12:47,982 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 905 transitions. [2023-08-24 15:12:47,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 905 transitions. [2023-08-24 15:12:47,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:47,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 905 transitions. [2023-08-24 15:12:47,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.5625) internal successors, (905), 16 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:47,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 130.0) internal successors, (2210), 17 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:47,986 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 130.0) internal successors, (2210), 17 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:47,986 INFO L175 Difference]: Start difference. First operand has 356 places, 1320 transitions, 31349 flow. Second operand 16 states and 905 transitions. [2023-08-24 15:12:47,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1764 transitions, 45786 flow [2023-08-24 15:12:50,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1764 transitions, 45314 flow, removed 236 selfloop flow, removed 0 redundant places. [2023-08-24 15:12:50,170 INFO L231 Difference]: Finished difference. Result has 381 places, 1631 transitions, 42174 flow [2023-08-24 15:12:50,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=30929, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=42174, PETRI_PLACES=381, PETRI_TRANSITIONS=1631} [2023-08-24 15:12:50,171 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 361 predicate places. [2023-08-24 15:12:50,171 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 1631 transitions, 42174 flow [2023-08-24 15:12:50,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 52.705882352941174) internal successors, (896), 17 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:50,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:50,172 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:50,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:50,377 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 [2023-08-24 15:12:50,377 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:50,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:50,378 INFO L85 PathProgramCache]: Analyzing trace with hash 924901992, now seen corresponding path program 22 times [2023-08-24 15:12:50,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:50,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258169834] [2023-08-24 15:12:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:50,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:50,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:50,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258169834] [2023-08-24 15:12:50,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258169834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:50,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235610028] [2023-08-24 15:12:50,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:12:50,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:50,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:50,489 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) [2023-08-24 15:12:50,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 15:12:50,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:12:50,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:50,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:12:50,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:50,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:50,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235610028] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:50,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:50,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-24 15:12:50,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148478889] [2023-08-24 15:12:50,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:50,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:12:50,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:50,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:12:50,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:12:50,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:50,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 1631 transitions, 42174 flow. Second operand has 18 states, 18 states have (on average 52.666666666666664) internal successors, (948), 18 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:50,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:50,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:50,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:54,348 INFO L124 PetriNetUnfolderBase]: 4365/7612 cut-off events. [2023-08-24 15:12:54,348 INFO L125 PetriNetUnfolderBase]: For 276515/276515 co-relation queries the response was YES. [2023-08-24 15:12:54,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91244 conditions, 7612 events. 4365/7612 cut-off events. For 276515/276515 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 55822 event pairs, 667 based on Foata normal form. 22/7634 useless extension candidates. Maximal degree in co-relation 89877. Up to 4255 conditions per place. [2023-08-24 15:12:54,456 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 665 selfloop transitions, 1222 changer transitions 32/1919 dead transitions. [2023-08-24 15:12:54,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1919 transitions, 53469 flow [2023-08-24 15:12:54,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 15:12:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 15:12:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1604 transitions. [2023-08-24 15:12:54,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42546419098143234 [2023-08-24 15:12:54,458 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1604 transitions. [2023-08-24 15:12:54,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1604 transitions. [2023-08-24 15:12:54,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:54,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1604 transitions. [2023-08-24 15:12:54,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.310344827586206) internal successors, (1604), 29 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:54,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 130.0) internal successors, (3900), 30 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:54,464 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 130.0) internal successors, (3900), 30 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:54,464 INFO L175 Difference]: Start difference. First operand has 381 places, 1631 transitions, 42174 flow. Second operand 29 states and 1604 transitions. [2023-08-24 15:12:54,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1919 transitions, 53469 flow [2023-08-24 15:12:57,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1919 transitions, 53096 flow, removed 165 selfloop flow, removed 4 redundant places. [2023-08-24 15:12:57,155 INFO L231 Difference]: Finished difference. Result has 408 places, 1831 transitions, 50369 flow [2023-08-24 15:12:57,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=41839, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=50369, PETRI_PLACES=408, PETRI_TRANSITIONS=1831} [2023-08-24 15:12:57,157 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 388 predicate places. [2023-08-24 15:12:57,157 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 1831 transitions, 50369 flow [2023-08-24 15:12:57,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.666666666666664) internal successors, (948), 18 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:57,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:57,157 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:57,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:57,359 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 [2023-08-24 15:12:57,360 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:57,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:57,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1155824126, now seen corresponding path program 23 times [2023-08-24 15:12:57,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:57,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240867478] [2023-08-24 15:12:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:57,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:57,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:57,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240867478] [2023-08-24 15:12:57,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240867478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:57,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269590115] [2023-08-24 15:12:57,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:12:57,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:57,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:57,469 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) [2023-08-24 15:12:57,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 15:12:57,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 15:12:57,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:57,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:12:57,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:57,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:57,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269590115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:57,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:57,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-24 15:12:57,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102731051] [2023-08-24 15:12:57,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:57,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:12:57,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:57,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:12:57,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:12:57,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:12:57,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 1831 transitions, 50369 flow. Second operand has 18 states, 18 states have (on average 52.888888888888886) internal successors, (952), 18 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:57,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:57,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:12:57,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:13:02,454 INFO L124 PetriNetUnfolderBase]: 4816/8425 cut-off events. [2023-08-24 15:13:02,454 INFO L125 PetriNetUnfolderBase]: For 311919/311919 co-relation queries the response was YES. [2023-08-24 15:13:02,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103463 conditions, 8425 events. 4816/8425 cut-off events. For 311919/311919 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 62291 event pairs, 206 based on Foata normal form. 86/8511 useless extension candidates. Maximal degree in co-relation 102125. Up to 2281 conditions per place. [2023-08-24 15:13:02,584 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 688 selfloop transitions, 1424 changer transitions 15/2127 dead transitions. [2023-08-24 15:13:02,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 2127 transitions, 61263 flow [2023-08-24 15:13:02,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 15:13:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 15:13:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1948 transitions. [2023-08-24 15:13:02,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42813186813186815 [2023-08-24 15:13:02,588 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1948 transitions. [2023-08-24 15:13:02,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1948 transitions. [2023-08-24 15:13:02,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:13:02,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1948 transitions. [2023-08-24 15:13:02,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.65714285714286) internal successors, (1948), 35 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:02,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 130.0) internal successors, (4680), 36 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:02,603 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 130.0) internal successors, (4680), 36 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:02,603 INFO L175 Difference]: Start difference. First operand has 408 places, 1831 transitions, 50369 flow. Second operand 35 states and 1948 transitions. [2023-08-24 15:13:02,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 2127 transitions, 61263 flow [2023-08-24 15:13:06,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 2127 transitions, 56703 flow, removed 1275 selfloop flow, removed 17 redundant places. [2023-08-24 15:13:06,512 INFO L231 Difference]: Finished difference. Result has 437 places, 2027 transitions, 56198 flow [2023-08-24 15:13:06,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=46415, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=56198, PETRI_PLACES=437, PETRI_TRANSITIONS=2027} [2023-08-24 15:13:06,514 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 417 predicate places. [2023-08-24 15:13:06,514 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 2027 transitions, 56198 flow [2023-08-24 15:13:06,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.888888888888886) internal successors, (952), 18 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:06,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:13:06,515 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:13:06,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 15:13:06,719 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 [2023-08-24 15:13:06,720 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:13:06,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:13:06,720 INFO L85 PathProgramCache]: Analyzing trace with hash -632607142, now seen corresponding path program 24 times [2023-08-24 15:13:06,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:13:06,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581756815] [2023-08-24 15:13:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:13:06,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:13:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:13:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:13:06,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:13:06,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581756815] [2023-08-24 15:13:06,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581756815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:13:06,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908324735] [2023-08-24 15:13:06,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:13:06,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:13:06,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:13:06,825 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) [2023-08-24 15:13:06,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 15:13:06,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 15:13:06,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:13:06,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:13:06,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:13:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:13:06,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:13:07,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:13:07,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908324735] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:13:07,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:13:07,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-24 15:13:07,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171239510] [2023-08-24 15:13:07,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:13:07,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:13:07,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:13:07,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:13:07,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:13:07,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:13:07,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 2027 transitions, 56198 flow. Second operand has 18 states, 18 states have (on average 52.666666666666664) internal successors, (948), 18 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:07,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:13:07,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:13:07,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:13:11,794 INFO L124 PetriNetUnfolderBase]: 4877/8614 cut-off events. [2023-08-24 15:13:11,794 INFO L125 PetriNetUnfolderBase]: For 314769/314769 co-relation queries the response was YES. [2023-08-24 15:13:11,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104256 conditions, 8614 events. 4877/8614 cut-off events. For 314769/314769 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 65088 event pairs, 278 based on Foata normal form. 52/8666 useless extension candidates. Maximal degree in co-relation 102943. Up to 3162 conditions per place. [2023-08-24 15:13:11,928 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 441 selfloop transitions, 1694 changer transitions 1/2136 dead transitions. [2023-08-24 15:13:11,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 2136 transitions, 62055 flow [2023-08-24 15:13:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 15:13:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 15:13:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2048 transitions. [2023-08-24 15:13:11,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257796257796258 [2023-08-24 15:13:11,931 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2048 transitions. [2023-08-24 15:13:11,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2048 transitions. [2023-08-24 15:13:11,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:13:11,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2048 transitions. [2023-08-24 15:13:11,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.351351351351354) internal successors, (2048), 37 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:11,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 130.0) internal successors, (4940), 38 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:11,937 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 130.0) internal successors, (4940), 38 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:11,937 INFO L175 Difference]: Start difference. First operand has 437 places, 2027 transitions, 56198 flow. Second operand 37 states and 2048 transitions. [2023-08-24 15:13:11,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 2136 transitions, 62055 flow [2023-08-24 15:13:16,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 2136 transitions, 60622 flow, removed 472 selfloop flow, removed 17 redundant places. [2023-08-24 15:13:16,646 INFO L231 Difference]: Finished difference. Result has 457 places, 2066 transitions, 59960 flow [2023-08-24 15:13:16,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=54788, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1652, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=59960, PETRI_PLACES=457, PETRI_TRANSITIONS=2066} [2023-08-24 15:13:16,648 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 437 predicate places. [2023-08-24 15:13:16,648 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 2066 transitions, 59960 flow [2023-08-24 15:13:16,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.666666666666664) internal successors, (948), 18 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:16,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:13:16,649 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:13:16,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 15:13:16,857 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 [2023-08-24 15:13:16,857 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:13:16,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:13:16,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1978128522, now seen corresponding path program 25 times [2023-08-24 15:13:16,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:13:16,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688780309] [2023-08-24 15:13:16,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:13:16,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:13:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:13:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:13:16,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:13:16,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688780309] [2023-08-24 15:13:16,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688780309] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:13:16,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611589571] [2023-08-24 15:13:16,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:13:16,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:13:16,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:13:16,969 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) [2023-08-24 15:13:16,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 15:13:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:13:17,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:13:17,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:13:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:13:17,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:13:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:13:17,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611589571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:13:17,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:13:17,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-08-24 15:13:17,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909662813] [2023-08-24 15:13:17,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:13:17,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:13:17,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:13:17,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:13:17,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:13:17,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:13:17,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 2066 transitions, 59960 flow. Second operand has 19 states, 19 states have (on average 52.89473684210526) internal successors, (1005), 19 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:17,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:13:17,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:13:17,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:13:23,251 INFO L124 PetriNetUnfolderBase]: 5091/8994 cut-off events. [2023-08-24 15:13:23,251 INFO L125 PetriNetUnfolderBase]: For 315817/315817 co-relation queries the response was YES. [2023-08-24 15:13:23,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112479 conditions, 8994 events. 5091/8994 cut-off events. For 315817/315817 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 68312 event pairs, 521 based on Foata normal form. 12/9006 useless extension candidates. Maximal degree in co-relation 111191. Up to 3657 conditions per place. [2023-08-24 15:13:23,761 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 1301 selfloop transitions, 935 changer transitions 0/2236 dead transitions. [2023-08-24 15:13:23,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 2236 transitions, 67983 flow [2023-08-24 15:13:23,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 15:13:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 15:13:23,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1337 transitions. [2023-08-24 15:13:23,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428525641025641 [2023-08-24 15:13:23,763 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1337 transitions. [2023-08-24 15:13:23,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1337 transitions. [2023-08-24 15:13:23,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:13:23,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1337 transitions. [2023-08-24 15:13:23,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.708333333333336) internal successors, (1337), 24 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:23,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 130.0) internal successors, (3250), 25 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:23,768 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 130.0) internal successors, (3250), 25 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:23,768 INFO L175 Difference]: Start difference. First operand has 457 places, 2066 transitions, 59960 flow. Second operand 24 states and 1337 transitions. [2023-08-24 15:13:23,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 2236 transitions, 67983 flow [2023-08-24 15:13:27,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 2236 transitions, 65370 flow, removed 130 selfloop flow, removed 28 redundant places. [2023-08-24 15:13:27,733 INFO L231 Difference]: Finished difference. Result has 458 places, 2148 transitions, 62446 flow [2023-08-24 15:13:27,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=57488, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2066, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=854, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=62446, PETRI_PLACES=458, PETRI_TRANSITIONS=2148} [2023-08-24 15:13:27,735 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 438 predicate places. [2023-08-24 15:13:27,735 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 2148 transitions, 62446 flow [2023-08-24 15:13:27,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 52.89473684210526) internal successors, (1005), 19 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:27,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:13:27,735 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:13:27,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-24 15:13:27,936 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 [2023-08-24 15:13:27,936 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:13:27,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:13:27,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1938741882, now seen corresponding path program 26 times [2023-08-24 15:13:27,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:13:27,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975645447] [2023-08-24 15:13:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:13:27,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:13:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:13:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:13:28,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:13:28,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975645447] [2023-08-24 15:13:28,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975645447] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:13:28,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322204827] [2023-08-24 15:13:28,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:13:28,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:13:28,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:13:28,033 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) [2023-08-24 15:13:28,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 15:13:28,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:13:28,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:13:28,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:13:28,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:13:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:13:28,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:13:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:13:28,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322204827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:13:28,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:13:28,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-24 15:13:28,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583541146] [2023-08-24 15:13:28,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:13:28,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:13:28,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:13:28,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:13:28,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:13:28,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:13:28,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 2148 transitions, 62446 flow. Second operand has 18 states, 18 states have (on average 52.888888888888886) internal successors, (952), 18 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:28,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:13:28,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:13:28,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:13:34,196 INFO L124 PetriNetUnfolderBase]: 5427/9604 cut-off events. [2023-08-24 15:13:34,197 INFO L125 PetriNetUnfolderBase]: For 359641/359641 co-relation queries the response was YES. [2023-08-24 15:13:34,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121595 conditions, 9604 events. 5427/9604 cut-off events. For 359641/359641 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 73654 event pairs, 371 based on Foata normal form. 22/9626 useless extension candidates. Maximal degree in co-relation 120269. Up to 2899 conditions per place. [2023-08-24 15:13:34,345 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 1099 selfloop transitions, 1260 changer transitions 24/2383 dead transitions. [2023-08-24 15:13:34,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 2383 transitions, 72563 flow [2023-08-24 15:13:34,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 15:13:34,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 15:13:34,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1666 transitions. [2023-08-24 15:13:34,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42717948717948717 [2023-08-24 15:13:34,348 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1666 transitions. [2023-08-24 15:13:34,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1666 transitions. [2023-08-24 15:13:34,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:13:34,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1666 transitions. [2023-08-24 15:13:34,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.53333333333333) internal successors, (1666), 30 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:34,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 130.0) internal successors, (4030), 31 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:34,353 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 130.0) internal successors, (4030), 31 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:34,353 INFO L175 Difference]: Start difference. First operand has 458 places, 2148 transitions, 62446 flow. Second operand 30 states and 1666 transitions. [2023-08-24 15:13:34,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 2383 transitions, 72563 flow [2023-08-24 15:13:39,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 2383 transitions, 71694 flow, removed 326 selfloop flow, removed 8 redundant places. [2023-08-24 15:13:39,159 INFO L231 Difference]: Finished difference. Result has 487 places, 2258 transitions, 68755 flow [2023-08-24 15:13:39,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=61680, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=924, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=68755, PETRI_PLACES=487, PETRI_TRANSITIONS=2258} [2023-08-24 15:13:39,161 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 467 predicate places. [2023-08-24 15:13:39,161 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 2258 transitions, 68755 flow [2023-08-24 15:13:39,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.888888888888886) internal successors, (952), 18 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:39,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:13:39,161 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:13:39,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 15:13:39,361 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 [2023-08-24 15:13:39,361 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:13:39,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:13:39,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1656576866, now seen corresponding path program 27 times [2023-08-24 15:13:39,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:13:39,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136839820] [2023-08-24 15:13:39,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:13:39,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:13:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:13:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:13:39,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:13:39,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136839820] [2023-08-24 15:13:39,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136839820] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:13:39,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445804282] [2023-08-24 15:13:39,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:13:39,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:13:39,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:13:39,457 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) [2023-08-24 15:13:39,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 15:13:39,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 15:13:39,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:13:39,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:13:39,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:13:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:13:39,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:13:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:13:39,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445804282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:13:39,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:13:39,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2023-08-24 15:13:39,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420432566] [2023-08-24 15:13:39,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:13:39,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:13:39,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:13:39,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:13:39,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:13:39,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:13:39,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 2258 transitions, 68755 flow. Second operand has 18 states, 18 states have (on average 52.94444444444444) internal successors, (953), 18 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:39,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:13:39,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:13:39,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:13:46,717 INFO L124 PetriNetUnfolderBase]: 6041/10712 cut-off events. [2023-08-24 15:13:46,717 INFO L125 PetriNetUnfolderBase]: For 434139/434139 co-relation queries the response was YES. [2023-08-24 15:13:46,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139461 conditions, 10712 events. 6041/10712 cut-off events. For 434139/434139 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 83585 event pairs, 152 based on Foata normal form. 70/10782 useless extension candidates. Maximal degree in co-relation 138455. Up to 2915 conditions per place. [2023-08-24 15:13:46,902 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 443 selfloop transitions, 2159 changer transitions 26/2628 dead transitions. [2023-08-24 15:13:46,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 2628 transitions, 83686 flow [2023-08-24 15:13:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 15:13:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 15:13:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1772 transitions. [2023-08-24 15:13:46,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42596153846153845 [2023-08-24 15:13:46,904 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1772 transitions. [2023-08-24 15:13:46,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1772 transitions. [2023-08-24 15:13:46,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:13:46,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1772 transitions. [2023-08-24 15:13:46,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.375) internal successors, (1772), 32 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:46,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 130.0) internal successors, (4290), 33 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:46,908 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 130.0) internal successors, (4290), 33 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:46,908 INFO L175 Difference]: Start difference. First operand has 487 places, 2258 transitions, 68755 flow. Second operand 32 states and 1772 transitions. [2023-08-24 15:13:46,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 2628 transitions, 83686 flow [2023-08-24 15:13:53,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 2628 transitions, 82146 flow, removed 423 selfloop flow, removed 14 redundant places. [2023-08-24 15:13:53,455 INFO L231 Difference]: Finished difference. Result has 510 places, 2518 transitions, 81830 flow [2023-08-24 15:13:53,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=67310, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1895, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=81830, PETRI_PLACES=510, PETRI_TRANSITIONS=2518} [2023-08-24 15:13:53,457 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 490 predicate places. [2023-08-24 15:13:53,457 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 2518 transitions, 81830 flow [2023-08-24 15:13:53,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.94444444444444) internal successors, (953), 18 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:53,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:13:53,457 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:13:53,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-24 15:13:53,657 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 [2023-08-24 15:13:53,658 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:13:53,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:13:53,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1887955518, now seen corresponding path program 28 times [2023-08-24 15:13:53,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:13:53,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972634060] [2023-08-24 15:13:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:13:53,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:13:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:13:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:13:53,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:13:53,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972634060] [2023-08-24 15:13:53,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972634060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:13:53,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958922866] [2023-08-24 15:13:53,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:13:53,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:13:53,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:13:53,757 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) [2023-08-24 15:13:53,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 15:13:53,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:13:53,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:13:53,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:13:53,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:13:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:13:53,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:13:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:13:53,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958922866] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:13:53,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:13:53,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2023-08-24 15:13:53,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288994626] [2023-08-24 15:13:53,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:13:53,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:13:53,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:13:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:13:53,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:13:53,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:13:53,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 2518 transitions, 81830 flow. Second operand has 18 states, 18 states have (on average 52.94444444444444) internal successors, (953), 18 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:13:53,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:13:53,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:13:53,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:14:02,130 INFO L124 PetriNetUnfolderBase]: 6299/11172 cut-off events. [2023-08-24 15:14:02,131 INFO L125 PetriNetUnfolderBase]: For 493236/493236 co-relation queries the response was YES. [2023-08-24 15:14:02,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153042 conditions, 11172 events. 6299/11172 cut-off events. For 493236/493236 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 88029 event pairs, 309 based on Foata normal form. 22/11194 useless extension candidates. Maximal degree in co-relation 151931. Up to 2817 conditions per place. [2023-08-24 15:14:02,310 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 986 selfloop transitions, 1748 changer transitions 12/2746 dead transitions. [2023-08-24 15:14:02,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 2746 transitions, 92969 flow [2023-08-24 15:14:02,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 15:14:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 15:14:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1884 transitions. [2023-08-24 15:14:02,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262443438914027 [2023-08-24 15:14:02,312 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1884 transitions. [2023-08-24 15:14:02,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1884 transitions. [2023-08-24 15:14:02,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:14:02,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1884 transitions. [2023-08-24 15:14:02,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.411764705882355) internal successors, (1884), 34 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:14:02,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 130.0) internal successors, (4550), 35 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:14:02,317 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 130.0) internal successors, (4550), 35 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:14:02,317 INFO L175 Difference]: Start difference. First operand has 510 places, 2518 transitions, 81830 flow. Second operand 34 states and 1884 transitions. [2023-08-24 15:14:02,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 2746 transitions, 92969 flow [2023-08-24 15:14:11,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 2746 transitions, 91405 flow, removed 524 selfloop flow, removed 13 redundant places. [2023-08-24 15:14:11,232 INFO L231 Difference]: Finished difference. Result has 540 places, 2640 transitions, 89487 flow [2023-08-24 15:14:11,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=80352, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1620, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=845, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=89487, PETRI_PLACES=540, PETRI_TRANSITIONS=2640} [2023-08-24 15:14:11,234 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 520 predicate places. [2023-08-24 15:14:11,234 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 2640 transitions, 89487 flow [2023-08-24 15:14:11,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.94444444444444) internal successors, (953), 18 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:14:11,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:14:11,234 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:14:11,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-24 15:14:11,434 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 [2023-08-24 15:14:11,434 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:14:11,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:14:11,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1041543878, now seen corresponding path program 29 times [2023-08-24 15:14:11,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:14:11,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377239334] [2023-08-24 15:14:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:14:11,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:14:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:14:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:14:11,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:14:11,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377239334] [2023-08-24 15:14:11,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377239334] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:14:11,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728685272] [2023-08-24 15:14:11,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:14:11,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:14:11,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:14:11,549 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) [2023-08-24 15:14:11,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 15:14:11,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:14:11,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:14:11,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:14:11,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:14:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:14:11,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:14:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:14:11,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728685272] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:14:11,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:14:11,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-08-24 15:14:11,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565374676] [2023-08-24 15:14:11,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:14:11,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 15:14:11,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:14:11,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 15:14:11,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2023-08-24 15:14:11,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:14:11,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 2640 transitions, 89487 flow. Second operand has 21 states, 21 states have (on average 52.80952380952381) internal successors, (1109), 21 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:14:11,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:14:11,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:14:11,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:14:20,913 INFO L124 PetriNetUnfolderBase]: 6729/11984 cut-off events. [2023-08-24 15:14:20,913 INFO L125 PetriNetUnfolderBase]: For 582236/582236 co-relation queries the response was YES. [2023-08-24 15:14:21,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170609 conditions, 11984 events. 6729/11984 cut-off events. For 582236/582236 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 96356 event pairs, 569 based on Foata normal form. 10/11994 useless extension candidates. Maximal degree in co-relation 169475. Up to 4213 conditions per place. [2023-08-24 15:14:21,144 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 1518 selfloop transitions, 1434 changer transitions 0/2952 dead transitions. [2023-08-24 15:14:21,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 2952 transitions, 104324 flow [2023-08-24 15:14:21,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 15:14:21,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 15:14:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2325 transitions. [2023-08-24 15:14:21,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258241758241758 [2023-08-24 15:14:21,148 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2325 transitions. [2023-08-24 15:14:21,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2325 transitions. [2023-08-24 15:14:21,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:14:21,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2325 transitions. [2023-08-24 15:14:21,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.357142857142854) internal successors, (2325), 42 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:14:21,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 130.0) internal successors, (5590), 43 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:14:21,154 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 130.0) internal successors, (5590), 43 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:14:21,155 INFO L175 Difference]: Start difference. First operand has 540 places, 2640 transitions, 89487 flow. Second operand 42 states and 2325 transitions. [2023-08-24 15:14:21,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 2952 transitions, 104324 flow [2023-08-24 15:14:32,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 2952 transitions, 103245 flow, removed 353 selfloop flow, removed 12 redundant places. [2023-08-24 15:14:32,320 INFO L231 Difference]: Finished difference. Result has 573 places, 2819 transitions, 98959 flow [2023-08-24 15:14:32,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=88490, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=98959, PETRI_PLACES=573, PETRI_TRANSITIONS=2819} [2023-08-24 15:14:32,322 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 553 predicate places. [2023-08-24 15:14:32,322 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 2819 transitions, 98959 flow [2023-08-24 15:14:32,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.80952380952381) internal successors, (1109), 21 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:14:32,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:14:32,322 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:14:32,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-24 15:14:32,522 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 [2023-08-24 15:14:32,523 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:14:32,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:14:32,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1712429018, now seen corresponding path program 30 times [2023-08-24 15:14:32,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:14:32,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955384752] [2023-08-24 15:14:32,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:14:32,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:14:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:14:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:14:32,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:14:32,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955384752] [2023-08-24 15:14:32,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955384752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:14:32,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173259306] [2023-08-24 15:14:32,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:14:32,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:14:32,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:14:32,612 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) [2023-08-24 15:14:32,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 15:14:32,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 15:14:32,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:14:32,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:14:32,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:14:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:14:32,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:14:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:14:32,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173259306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:14:32,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:14:32,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2023-08-24 15:14:32,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778279895] [2023-08-24 15:14:32,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:14:32,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:14:32,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:14:32,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:14:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:14:32,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:14:32,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 2819 transitions, 98959 flow. Second operand has 19 states, 19 states have (on average 52.68421052631579) internal successors, (1001), 19 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:14:32,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:14:32,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:14:32,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:14:45,660 INFO L124 PetriNetUnfolderBase]: 8611/15270 cut-off events. [2023-08-24 15:14:45,660 INFO L125 PetriNetUnfolderBase]: For 776196/776196 co-relation queries the response was YES. [2023-08-24 15:14:45,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220773 conditions, 15270 events. 8611/15270 cut-off events. For 776196/776196 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 125968 event pairs, 243 based on Foata normal form. 82/15352 useless extension candidates. Maximal degree in co-relation 219433. Up to 4083 conditions per place. [2023-08-24 15:14:45,942 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 604 selfloop transitions, 3084 changer transitions 41/3729 dead transitions. [2023-08-24 15:14:45,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 3729 transitions, 135364 flow [2023-08-24 15:14:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 15:14:45,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 15:14:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2214 transitions. [2023-08-24 15:14:45,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257692307692308 [2023-08-24 15:14:45,944 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2214 transitions. [2023-08-24 15:14:45,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2214 transitions. [2023-08-24 15:14:45,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:14:45,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2214 transitions. [2023-08-24 15:14:45,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.35) internal successors, (2214), 40 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:14:45,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 130.0) internal successors, (5330), 41 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:14:45,951 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 130.0) internal successors, (5330), 41 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:14:45,951 INFO L175 Difference]: Start difference. First operand has 573 places, 2819 transitions, 98959 flow. Second operand 40 states and 2214 transitions. [2023-08-24 15:14:45,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 3729 transitions, 135364 flow [2023-08-24 15:15:03,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 3729 transitions, 134139 flow, removed 534 selfloop flow, removed 9 redundant places. [2023-08-24 15:15:03,929 INFO L231 Difference]: Finished difference. Result has 615 places, 3614 transitions, 134575 flow [2023-08-24 15:15:03,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=98021, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=134575, PETRI_PLACES=615, PETRI_TRANSITIONS=3614} [2023-08-24 15:15:03,931 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 595 predicate places. [2023-08-24 15:15:03,931 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 3614 transitions, 134575 flow [2023-08-24 15:15:03,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 52.68421052631579) internal successors, (1001), 19 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:15:03,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:15:03,932 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:15:03,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 15:15:04,132 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 [2023-08-24 15:15:04,132 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:15:04,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:15:04,133 INFO L85 PathProgramCache]: Analyzing trace with hash -2136054518, now seen corresponding path program 31 times [2023-08-24 15:15:04,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:15:04,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949704684] [2023-08-24 15:15:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:15:04,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:15:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:15:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:15:04,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:15:04,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949704684] [2023-08-24 15:15:04,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949704684] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:15:04,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163354381] [2023-08-24 15:15:04,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:15:04,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:15:04,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:15:04,237 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) [2023-08-24 15:15:04,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 15:15:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:15:04,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:15:04,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:15:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:15:04,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:15:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:15:04,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163354381] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:15:04,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:15:04,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-24 15:15:04,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420876267] [2023-08-24 15:15:04,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:15:04,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 15:15:04,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:15:04,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 15:15:04,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-08-24 15:15:04,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:15:04,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 3614 transitions, 134575 flow. Second operand has 23 states, 23 states have (on average 52.73913043478261) internal successors, (1213), 23 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:15:04,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:15:04,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:15:04,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:15:20,864 INFO L124 PetriNetUnfolderBase]: 9154/16303 cut-off events. [2023-08-24 15:15:20,865 INFO L125 PetriNetUnfolderBase]: For 929477/929477 co-relation queries the response was YES. [2023-08-24 15:15:21,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250196 conditions, 16303 events. 9154/16303 cut-off events. For 929477/929477 co-relation queries the response was YES. Maximal size of possible extension queue 1205. Compared 137369 event pairs, 753 based on Foata normal form. 18/16321 useless extension candidates. Maximal degree in co-relation 248789. Up to 5057 conditions per place. [2023-08-24 15:15:21,210 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 1728 selfloop transitions, 2239 changer transitions 16/3983 dead transitions. [2023-08-24 15:15:21,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 3983 transitions, 154740 flow [2023-08-24 15:15:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 15:15:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 15:15:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2434 transitions. [2023-08-24 15:15:21,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42552447552447553 [2023-08-24 15:15:21,212 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2434 transitions. [2023-08-24 15:15:21,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2434 transitions. [2023-08-24 15:15:21,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:15:21,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2434 transitions. [2023-08-24 15:15:21,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.31818181818182) internal successors, (2434), 44 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:15:21,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 130.0) internal successors, (5850), 45 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:15:21,219 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 130.0) internal successors, (5850), 45 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:15:21,219 INFO L175 Difference]: Start difference. First operand has 615 places, 3614 transitions, 134575 flow. Second operand 44 states and 2434 transitions. [2023-08-24 15:15:21,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 3983 transitions, 154740 flow [2023-08-24 15:15:46,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 3983 transitions, 152199 flow, removed 985 selfloop flow, removed 14 redundant places. [2023-08-24 15:15:46,787 INFO L231 Difference]: Finished difference. Result has 652 places, 3873 transitions, 148408 flow [2023-08-24 15:15:46,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=132278, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1969, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=148408, PETRI_PLACES=652, PETRI_TRANSITIONS=3873} [2023-08-24 15:15:46,791 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 632 predicate places. [2023-08-24 15:15:46,792 INFO L495 AbstractCegarLoop]: Abstraction has has 652 places, 3873 transitions, 148408 flow [2023-08-24 15:15:46,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 52.73913043478261) internal successors, (1213), 23 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:15:46,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:15:46,792 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:15:46,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-24 15:15:46,997 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 [2023-08-24 15:15:46,997 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:15:46,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:15:46,997 INFO L85 PathProgramCache]: Analyzing trace with hash -524472968, now seen corresponding path program 32 times [2023-08-24 15:15:46,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:15:46,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83061682] [2023-08-24 15:15:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:15:46,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:15:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:15:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:15:47,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:15:47,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83061682] [2023-08-24 15:15:47,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83061682] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:15:47,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134562245] [2023-08-24 15:15:47,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:15:47,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:15:47,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:15:47,106 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) [2023-08-24 15:15:47,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 15:15:47,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:15:47,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:15:47,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:15:47,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:15:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:15:47,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:15:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:15:47,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134562245] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:15:47,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:15:47,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-08-24 15:15:47,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010281749] [2023-08-24 15:15:47,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:15:47,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 15:15:47,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:15:47,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 15:15:47,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-08-24 15:15:47,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:15:47,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 3873 transitions, 148408 flow. Second operand has 25 states, 25 states have (on average 52.72) internal successors, (1318), 25 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:15:47,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:15:47,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:15:47,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:16:11,805 INFO L124 PetriNetUnfolderBase]: 12707/22676 cut-off events. [2023-08-24 15:16:11,806 INFO L125 PetriNetUnfolderBase]: For 1413445/1413445 co-relation queries the response was YES. [2023-08-24 15:16:12,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358443 conditions, 22676 events. 12707/22676 cut-off events. For 1413445/1413445 co-relation queries the response was YES. Maximal size of possible extension queue 1573. Compared 200236 event pairs, 738 based on Foata normal form. 50/22726 useless extension candidates. Maximal degree in co-relation 357003. Up to 5881 conditions per place. [2023-08-24 15:16:12,334 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 1493 selfloop transitions, 3974 changer transitions 53/5520 dead transitions. [2023-08-24 15:16:12,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 5520 transitions, 225976 flow [2023-08-24 15:16:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-24 15:16:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-24 15:16:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2875 transitions. [2023-08-24 15:16:12,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42529585798816566 [2023-08-24 15:16:12,337 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2875 transitions. [2023-08-24 15:16:12,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2875 transitions. [2023-08-24 15:16:12,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:16:12,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2875 transitions. [2023-08-24 15:16:12,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 55.28846153846154) internal successors, (2875), 52 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:16:12,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 130.0) internal successors, (6890), 53 states have internal predecessors, (6890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:16:12,344 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 130.0) internal successors, (6890), 53 states have internal predecessors, (6890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:16:12,344 INFO L175 Difference]: Start difference. First operand has 652 places, 3873 transitions, 148408 flow. Second operand 52 states and 2875 transitions. [2023-08-24 15:16:12,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 5520 transitions, 225976 flow [2023-08-24 15:17:07,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 696 places, 5520 transitions, 224309 flow, removed 763 selfloop flow, removed 7 redundant places. [2023-08-24 15:17:07,355 INFO L231 Difference]: Finished difference. Result has 709 places, 5372 transitions, 223599 flow [2023-08-24 15:17:07,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=147532, PETRI_DIFFERENCE_MINUEND_PLACES=645, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=223599, PETRI_PLACES=709, PETRI_TRANSITIONS=5372} [2023-08-24 15:17:07,358 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 689 predicate places. [2023-08-24 15:17:07,358 INFO L495 AbstractCegarLoop]: Abstraction has has 709 places, 5372 transitions, 223599 flow [2023-08-24 15:17:07,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 52.72) internal successors, (1318), 25 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:17:07,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:17:07,359 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:17:07,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-24 15:17:07,560 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 [2023-08-24 15:17:07,560 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:17:07,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:17:07,561 INFO L85 PathProgramCache]: Analyzing trace with hash -689596014, now seen corresponding path program 33 times [2023-08-24 15:17:07,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:17:07,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856246663] [2023-08-24 15:17:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:17:07,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:17:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:17:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:17:07,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:17:07,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856246663] [2023-08-24 15:17:07,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856246663] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:17:07,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257959787] [2023-08-24 15:17:07,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:17:07,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:17:07,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:17:07,657 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) [2023-08-24 15:17:07,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 15:17:07,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-24 15:17:07,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:17:07,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:17:07,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:17:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:17:07,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:17:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:17:07,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257959787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:17:07,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:17:07,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2023-08-24 15:17:07,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236194680] [2023-08-24 15:17:07,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:17:07,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 15:17:07,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:17:07,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 15:17:07,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-08-24 15:17:07,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:17:07,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 5372 transitions, 223599 flow. Second operand has 21 states, 21 states have (on average 52.714285714285715) internal successors, (1107), 21 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:17:07,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:17:07,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:17:07,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:17:42,144 INFO L124 PetriNetUnfolderBase]: 12750/22657 cut-off events. [2023-08-24 15:17:42,144 INFO L125 PetriNetUnfolderBase]: For 1438018/1438018 co-relation queries the response was YES. [2023-08-24 15:17:42,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375683 conditions, 22657 events. 12750/22657 cut-off events. For 1438018/1438018 co-relation queries the response was YES. Maximal size of possible extension queue 1563. Compared 197482 event pairs, 3946 based on Foata normal form. 20/22677 useless extension candidates. Maximal degree in co-relation 373801. Up to 21898 conditions per place. [2023-08-24 15:17:42,625 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 5202 selfloop transitions, 274 changer transitions 7/5483 dead transitions. [2023-08-24 15:17:42,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 5483 transitions, 237696 flow [2023-08-24 15:17:42,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 15:17:42,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 15:17:42,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1222 transitions. [2023-08-24 15:17:42,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2023-08-24 15:17:42,627 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1222 transitions. [2023-08-24 15:17:42,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1222 transitions. [2023-08-24 15:17:42,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:17:42,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1222 transitions. [2023-08-24 15:17:42,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 55.54545454545455) internal successors, (1222), 22 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:17:42,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 130.0) internal successors, (2990), 23 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:17:42,631 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 130.0) internal successors, (2990), 23 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:17:42,631 INFO L175 Difference]: Start difference. First operand has 709 places, 5372 transitions, 223599 flow. Second operand 22 states and 1222 transitions. [2023-08-24 15:17:42,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 730 places, 5483 transitions, 237696 flow [2023-08-24 15:18:53,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 717 places, 5483 transitions, 236397 flow, removed 539 selfloop flow, removed 13 redundant places. [2023-08-24 15:18:53,504 INFO L231 Difference]: Finished difference. Result has 719 places, 5447 transitions, 225465 flow [2023-08-24 15:18:53,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=222300, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=225465, PETRI_PLACES=719, PETRI_TRANSITIONS=5447} [2023-08-24 15:18:53,508 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 699 predicate places. [2023-08-24 15:18:53,508 INFO L495 AbstractCegarLoop]: Abstraction has has 719 places, 5447 transitions, 225465 flow [2023-08-24 15:18:53,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.714285714285715) internal successors, (1107), 21 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:18:53,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:18:53,509 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:18:53,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-24 15:18:53,713 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 [2023-08-24 15:18:53,714 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:18:53,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:18:53,714 INFO L85 PathProgramCache]: Analyzing trace with hash 837446760, now seen corresponding path program 34 times [2023-08-24 15:18:53,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:18:53,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360831915] [2023-08-24 15:18:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:18:53,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:18:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:18:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:18:53,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:18:53,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360831915] [2023-08-24 15:18:53,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360831915] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:18:53,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166303347] [2023-08-24 15:18:53,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:18:53,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:18:53,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:18:53,814 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) [2023-08-24 15:18:53,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-24 15:18:53,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:18:53,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:18:53,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:18:53,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:18:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:18:53,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:18:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:18:54,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166303347] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:18:54,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:18:54,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2023-08-24 15:18:54,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062700755] [2023-08-24 15:18:54,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:18:54,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 15:18:54,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:18:54,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 15:18:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2023-08-24 15:18:54,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:18:54,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 5447 transitions, 225465 flow. Second operand has 22 states, 22 states have (on average 52.59090909090909) internal successors, (1157), 22 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:18:54,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:18:54,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:18:54,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:19:26,504 INFO L124 PetriNetUnfolderBase]: 12829/22823 cut-off events. [2023-08-24 15:19:26,504 INFO L125 PetriNetUnfolderBase]: For 1473177/1473177 co-relation queries the response was YES. [2023-08-24 15:19:26,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373140 conditions, 22823 events. 12829/22823 cut-off events. For 1473177/1473177 co-relation queries the response was YES. Maximal size of possible extension queue 1585. Compared 199473 event pairs, 3915 based on Foata normal form. 76/22899 useless extension candidates. Maximal degree in co-relation 371751. Up to 21616 conditions per place. [2023-08-24 15:19:26,989 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 5205 selfloop transitions, 333 changer transitions 7/5545 dead transitions. [2023-08-24 15:19:26,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 5545 transitions, 237963 flow [2023-08-24 15:19:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 15:19:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 15:19:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1777 transitions. [2023-08-24 15:19:26,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4271634615384615 [2023-08-24 15:19:26,991 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1777 transitions. [2023-08-24 15:19:26,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1777 transitions. [2023-08-24 15:19:26,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:19:26,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1777 transitions. [2023-08-24 15:19:26,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.53125) internal successors, (1777), 32 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:19:26,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 130.0) internal successors, (4290), 33 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:19:26,995 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 130.0) internal successors, (4290), 33 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:19:26,995 INFO L175 Difference]: Start difference. First operand has 719 places, 5447 transitions, 225465 flow. Second operand 32 states and 1777 transitions. [2023-08-24 15:19:26,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 5545 transitions, 237963 flow [2023-08-24 15:20:38,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 5545 transitions, 236112 flow, removed 580 selfloop flow, removed 23 redundant places. [2023-08-24 15:20:38,858 INFO L231 Difference]: Finished difference. Result has 731 places, 5487 transitions, 225401 flow [2023-08-24 15:20:38,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=223506, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=225401, PETRI_PLACES=731, PETRI_TRANSITIONS=5487} [2023-08-24 15:20:38,862 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 711 predicate places. [2023-08-24 15:20:38,862 INFO L495 AbstractCegarLoop]: Abstraction has has 731 places, 5487 transitions, 225401 flow [2023-08-24 15:20:38,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 52.59090909090909) internal successors, (1157), 22 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:20:38,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:20:38,862 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:20:38,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-24 15:20:39,068 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 [2023-08-24 15:20:39,068 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:20:39,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:20:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1713500944, now seen corresponding path program 35 times [2023-08-24 15:20:39,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:20:39,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565379912] [2023-08-24 15:20:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:20:39,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:20:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:20:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:20:39,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:20:39,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565379912] [2023-08-24 15:20:39,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565379912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:20:39,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502937451] [2023-08-24 15:20:39,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:20:39,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:20:39,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:20:39,171 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) [2023-08-24 15:20:39,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-24 15:20:39,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:20:39,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:20:39,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:20:39,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:20:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:20:39,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:20:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:20:39,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502937451] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:20:39,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:20:39,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-08-24 15:20:39,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117747622] [2023-08-24 15:20:39,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:20:39,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 15:20:39,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:20:39,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 15:20:39,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-08-24 15:20:39,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:20:39,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 731 places, 5487 transitions, 225401 flow. Second operand has 25 states, 25 states have (on average 52.64) internal successors, (1316), 25 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:20:39,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:20:39,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:20:39,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:21:19,746 INFO L124 PetriNetUnfolderBase]: 12960/23080 cut-off events. [2023-08-24 15:21:19,747 INFO L125 PetriNetUnfolderBase]: For 1455402/1455402 co-relation queries the response was YES. [2023-08-24 15:21:20,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375233 conditions, 23080 events. 12960/23080 cut-off events. For 1455402/1455402 co-relation queries the response was YES. Maximal size of possible extension queue 1608. Compared 202468 event pairs, 3903 based on Foata normal form. 28/23102 useless extension candidates. Maximal degree in co-relation 373502. Up to 21536 conditions per place. [2023-08-24 15:21:20,239 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 5218 selfloop transitions, 407 changer transitions 29/5654 dead transitions. [2023-08-24 15:21:20,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 5654 transitions, 240323 flow [2023-08-24 15:21:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 15:21:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 15:21:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2487 transitions. [2023-08-24 15:21:20,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42512820512820515 [2023-08-24 15:21:20,242 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2487 transitions. [2023-08-24 15:21:20,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2487 transitions. [2023-08-24 15:21:20,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:21:20,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2487 transitions. [2023-08-24 15:21:20,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 55.266666666666666) internal successors, (2487), 45 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:21:20,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 130.0) internal successors, (5980), 46 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:21:20,248 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 130.0) internal successors, (5980), 46 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:21:20,249 INFO L175 Difference]: Start difference. First operand has 731 places, 5487 transitions, 225401 flow. Second operand 45 states and 2487 transitions. [2023-08-24 15:21:20,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 5654 transitions, 240323 flow [2023-08-24 15:22:33,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 757 places, 5654 transitions, 238621 flow, removed 595 selfloop flow, removed 16 redundant places. [2023-08-24 15:22:33,438 INFO L231 Difference]: Finished difference. Result has 762 places, 5548 transitions, 226926 flow [2023-08-24 15:22:33,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=224119, PETRI_DIFFERENCE_MINUEND_PLACES=713, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=226926, PETRI_PLACES=762, PETRI_TRANSITIONS=5548} [2023-08-24 15:22:33,443 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 742 predicate places. [2023-08-24 15:22:33,443 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 5548 transitions, 226926 flow [2023-08-24 15:22:33,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 52.64) internal successors, (1316), 25 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:22:33,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:22:33,443 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:22:33,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-24 15:22:33,648 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 [2023-08-24 15:22:33,649 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:22:33,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:22:33,649 INFO L85 PathProgramCache]: Analyzing trace with hash 159736193, now seen corresponding path program 36 times [2023-08-24 15:22:33,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:22:33,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191748986] [2023-08-24 15:22:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:22:33,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:22:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:22:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:22:33,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:22:33,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191748986] [2023-08-24 15:22:33,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191748986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:22:33,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575753574] [2023-08-24 15:22:33,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:22:33,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:22:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:22:33,761 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) [2023-08-24 15:22:33,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-24 15:22:33,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 15:22:33,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:22:33,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 15:22:33,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:22:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:22:33,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:22:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:22:33,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575753574] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:22:33,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:22:33,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-08-24 15:22:33,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853546184] [2023-08-24 15:22:33,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:22:33,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 15:22:33,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:22:33,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 15:22:33,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-24 15:22:33,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 130 [2023-08-24 15:22:33,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 5548 transitions, 226926 flow. Second operand has 7 states, 7 states have (on average 65.71428571428571) internal successors, (460), 7 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:22:33,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:22:33,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 130 [2023-08-24 15:22:33,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:23:20,425 INFO L124 PetriNetUnfolderBase]: 16063/28456 cut-off events. [2023-08-24 15:23:20,425 INFO L125 PetriNetUnfolderBase]: For 1682210/1682222 co-relation queries the response was YES. [2023-08-24 15:23:21,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451883 conditions, 28456 events. 16063/28456 cut-off events. For 1682210/1682222 co-relation queries the response was YES. Maximal size of possible extension queue 2045. Compared 255825 event pairs, 738 based on Foata normal form. 16/28432 useless extension candidates. Maximal degree in co-relation 449162. Up to 18797 conditions per place. [2023-08-24 15:23:21,538 INFO L140 encePairwiseOnDemand]: 126/130 looper letters, 4969 selfloop transitions, 1940 changer transitions 344/7262 dead transitions. [2023-08-24 15:23:21,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 768 places, 7262 transitions, 305601 flow [2023-08-24 15:23:21,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:23:21,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:23:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 509 transitions. [2023-08-24 15:23:21,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5593406593406594 [2023-08-24 15:23:21,539 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 509 transitions. [2023-08-24 15:23:21,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 509 transitions. [2023-08-24 15:23:21,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:23:21,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 509 transitions. [2023-08-24 15:23:21,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.71428571428571) internal successors, (509), 7 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:23:21,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 130.0) internal successors, (1040), 8 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:23:21,540 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 130.0) internal successors, (1040), 8 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:23:21,540 INFO L175 Difference]: Start difference. First operand has 762 places, 5548 transitions, 226926 flow. Second operand 7 states and 509 transitions. [2023-08-24 15:23:21,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 768 places, 7262 transitions, 305601 flow [2023-08-24 15:24:59,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 7262 transitions, 304056 flow, removed 598 selfloop flow, removed 15 redundant places. [2023-08-24 15:24:59,892 INFO L231 Difference]: Finished difference. Result has 758 places, 6462 transitions, 259540 flow [2023-08-24 15:24:59,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=226102, PETRI_DIFFERENCE_MINUEND_PLACES=747, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=952, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=259540, PETRI_PLACES=758, PETRI_TRANSITIONS=6462} [2023-08-24 15:24:59,897 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 738 predicate places. [2023-08-24 15:24:59,898 INFO L495 AbstractCegarLoop]: Abstraction has has 758 places, 6462 transitions, 259540 flow [2023-08-24 15:24:59,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 65.71428571428571) internal successors, (460), 7 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:24:59,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:59,898 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:24:59,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-24 15:25:00,103 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 [2023-08-24 15:25:00,103 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:25:00,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:25:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash 95359142, now seen corresponding path program 37 times [2023-08-24 15:25:00,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:25:00,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052856886] [2023-08-24 15:25:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:25:00,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:25:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:25:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:00,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:25:00,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052856886] [2023-08-24 15:25:00,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052856886] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:25:00,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635389970] [2023-08-24 15:25:00,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:25:00,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:00,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:25:00,224 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) [2023-08-24 15:25:00,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-24 15:25:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:25:00,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 15:25:00,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:25:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:00,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:25:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:00,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635389970] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:25:00,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:25:00,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-08-24 15:25:00,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953715806] [2023-08-24 15:25:00,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:25:00,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:25:00,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:25:00,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:25:00,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:25:00,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 15:25:00,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 758 places, 6462 transitions, 259540 flow. Second operand has 20 states, 20 states have (on average 52.75) internal successors, (1055), 20 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:25:00,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:25:00,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 15:25:00,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-24 15:25:56,058 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 15:25:56,069 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 [2023-08-24 15:25:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 15:25:56,725 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 15:25:56,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-24 15:25:56,925 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 [2023-08-24 15:25:56,925 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 51/130 universal loopers) in iteration 44,while PetriNetUnfolder was constructing finite prefix that currently has 529859 conditions, 32072 events (18085/32071 cut-off events. For 1927643/1927643 co-relation queries the response was YES. Maximal size of possible extension queue 2347. Compared 300909 event pairs, 903 based on Foata normal form. 22/32770 useless extension candidates. Maximal degree in co-relation 527289. Up to 15862 conditions per place.). [2023-08-24 15:25:56,926 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 15:25:56,926 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 15:25:56,927 INFO L445 BasicCegarLoop]: Path program histogram: [37, 6, 1] [2023-08-24 15:25:56,929 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 15:25:56,929 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 15:25:56,931 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 03:25:56 BasicIcfg [2023-08-24 15:25:56,931 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 15:25:56,932 INFO L158 Benchmark]: Toolchain (without parser) took 828008.84ms. Allocated memory was 348.1MB in the beginning and 8.5GB in the end (delta: 8.2GB). Free memory was 325.2MB in the beginning and 4.7GB in the end (delta: -4.3GB). Peak memory consumption was 5.7GB. Max. memory is 16.0GB. [2023-08-24 15:25:56,932 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 348.1MB. Free memory is still 325.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 15:25:56,932 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.07ms. Allocated memory is still 348.1MB. Free memory was 324.7MB in the beginning and 314.2MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 15:25:56,933 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.25ms. Allocated memory is still 348.1MB. Free memory was 314.2MB in the beginning and 312.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 15:25:56,933 INFO L158 Benchmark]: Boogie Preprocessor took 36.66ms. Allocated memory is still 348.1MB. Free memory was 312.7MB in the beginning and 311.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 15:25:56,933 INFO L158 Benchmark]: RCFGBuilder took 378.53ms. Allocated memory is still 348.1MB. Free memory was 311.1MB in the beginning and 297.5MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-24 15:25:56,933 INFO L158 Benchmark]: TraceAbstraction took 827313.44ms. Allocated memory was 348.1MB in the beginning and 8.5GB in the end (delta: 8.2GB). Free memory was 296.5MB in the beginning and 4.7GB in the end (delta: -4.4GB). Peak memory consumption was 5.7GB. Max. memory is 16.0GB. [2023-08-24 15:25:56,935 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 348.1MB. Free memory is still 325.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 236.07ms. Allocated memory is still 348.1MB. Free memory was 324.7MB in the beginning and 314.2MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 35.25ms. Allocated memory is still 348.1MB. Free memory was 314.2MB in the beginning and 312.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 36.66ms. Allocated memory is still 348.1MB. Free memory was 312.7MB in the beginning and 311.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 378.53ms. Allocated memory is still 348.1MB. Free memory was 311.1MB in the beginning and 297.5MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 827313.44ms. Allocated memory was 348.1MB in the beginning and 8.5GB in the end (delta: 8.2GB). Free memory was 296.5MB in the beginning and 4.7GB in the end (delta: -4.4GB). Peak memory consumption was 5.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 67 PlacesBefore, 20 PlacesAfterwards, 65 TransitionsBefore, 15 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 55 TotalNumberOfCompositions, 591 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 581, independent: 578, independent conditional: 0, independent unconditional: 578, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 310, independent: 308, independent conditional: 0, independent unconditional: 308, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 581, independent: 270, independent conditional: 0, independent unconditional: 270, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 310, unknown conditional: 0, unknown unconditional: 310] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 51/130 universal loopers) in iteration 44,while PetriNetUnfolder was constructing finite prefix that currently has 529859 conditions, 32072 events (18085/32071 cut-off events. For 1927643/1927643 co-relation queries the response was YES. Maximal size of possible extension queue 2347. Compared 300909 event pairs, 903 based on Foata normal form. 22/32770 useless extension candidates. Maximal degree in co-relation 527289. Up to 15862 conditions per place.). - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 51/130 universal loopers) in iteration 44,while PetriNetUnfolder was constructing finite prefix that currently has 529859 conditions, 32072 events (18085/32071 cut-off events. For 1927643/1927643 co-relation queries the response was YES. Maximal size of possible extension queue 2347. Compared 300909 event pairs, 903 based on Foata normal form. 22/32770 useless extension candidates. Maximal degree in co-relation 527289. Up to 15862 conditions per place.). - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 51/130 universal loopers) in iteration 44,while PetriNetUnfolder was constructing finite prefix that currently has 529859 conditions, 32072 events (18085/32071 cut-off events. For 1927643/1927643 co-relation queries the response was YES. Maximal size of possible extension queue 2347. Compared 300909 event pairs, 903 based on Foata normal form. 22/32770 useless extension candidates. Maximal degree in co-relation 527289. Up to 15862 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 827.2s, OverallIterations: 44, TraceHistogramMax: 5, PathProgramHistogramMax: 37, EmptinessCheckTime: 0.0s, AutomataDifference: 804.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2093 SdHoareTripleChecker+Valid, 6.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2093 mSDsluCounter, 505 SdHoareTripleChecker+Invalid, 5.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 336 mSDsCounter, 305 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13438 IncrementalHoareTripleChecker+Invalid, 13743 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 305 mSolverCounterUnsat, 169 mSDtfsCounter, 13438 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2296 GetRequests, 1028 SyntacticMatches, 210 SemanticMatches, 1058 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12089 ImplicationChecksByTransitivity, 8.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=259540occurred in iteration=43, InterpolantAutomatonStates: 915, 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: 0.4s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 1511 NumberOfCodeBlocks, 1493 NumberOfCodeBlocksAsserted, 137 NumberOfCheckSat, 2115 ConstructedInterpolants, 0 QuantifiedInterpolants, 6911 SizeOfPredicates, 36 NumberOfNonLiveVariables, 5332 ConjunctsInSsa, 364 ConjunctsInUnsatCore, 124 InterpolantComputations, 4 PerfectInterpolantSequences, 428/1281 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