/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-nonblocking-cntr.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 16:06:33,786 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 16:06:33,848 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 16:06:33,851 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 16:06:33,852 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 16:06:33,875 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 16:06:33,876 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 16:06:33,879 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 16:06:33,880 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 16:06:33,883 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 16:06:33,883 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 16:06:33,883 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 16:06:33,883 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 16:06:33,884 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 16:06:33,884 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 16:06:33,884 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 16:06:33,885 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 16:06:33,885 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 16:06:33,885 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 16:06:33,885 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 16:06:33,885 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 16:06:33,886 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 16:06:33,886 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 16:06:33,886 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 16:06:33,887 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 16:06:33,887 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 16:06:33,887 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 16:06:33,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 16:06:33,887 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 16:06:33,887 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 16:06:33,888 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 16:06:33,888 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 16:06:33,888 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 16:06:33,888 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 16:06:33,889 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 16:06:33,889 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 16:06:34,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 16:06:34,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 16:06:34,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 16:06:34,154 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 16:06:34,154 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 16:06:34,155 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-08-24 16:06:35,147 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 16:06:35,349 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 16:06:35,349 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-08-24 16:06:35,357 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9934bf5c0/8c73a4d0d7b4429b80b40642e4c4b7fd/FLAG3cf456a4b [2023-08-24 16:06:35,365 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9934bf5c0/8c73a4d0d7b4429b80b40642e4c4b7fd [2023-08-24 16:06:35,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 16:06:35,368 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 16:06:35,368 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 16:06:35,369 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 16:06:35,370 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 16:06:35,371 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:06:35" (1/1) ... [2023-08-24 16:06:35,371 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9a3e49c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:06:35, skipping insertion in model container [2023-08-24 16:06:35,371 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:06:35" (1/1) ... [2023-08-24 16:06:35,388 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 16:06:35,513 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-nonblocking-cntr.wvr.c[2037,2050] [2023-08-24 16:06:35,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 16:06:35,519 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 16:06:35,536 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-nonblocking-cntr.wvr.c[2037,2050] [2023-08-24 16:06:35,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 16:06:35,546 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 16:06:35,546 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 16:06:35,550 INFO L206 MainTranslator]: Completed translation [2023-08-24 16:06:35,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:06:35 WrapperNode [2023-08-24 16:06:35,551 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 16:06:35,551 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 16:06:35,551 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 16:06:35,551 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 16:06:35,555 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:06:35" (1/1) ... [2023-08-24 16:06:35,561 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:06:35" (1/1) ... [2023-08-24 16:06:35,575 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2023-08-24 16:06:35,575 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 16:06:35,576 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 16:06:35,576 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 16:06:35,576 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 16:06:35,581 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:06:35" (1/1) ... [2023-08-24 16:06:35,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:06:35" (1/1) ... [2023-08-24 16:06:35,589 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:06:35" (1/1) ... [2023-08-24 16:06:35,589 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:06:35" (1/1) ... [2023-08-24 16:06:35,597 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:06:35" (1/1) ... [2023-08-24 16:06:35,599 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:06:35" (1/1) ... [2023-08-24 16:06:35,600 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:06:35" (1/1) ... [2023-08-24 16:06:35,603 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:06:35" (1/1) ... [2023-08-24 16:06:35,604 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 16:06:35,605 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 16:06:35,605 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 16:06:35,605 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 16:06:35,605 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:06:35" (1/1) ... [2023-08-24 16:06:35,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 16:06:35,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:35,646 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 16:06:35,657 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 16:06:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 16:06:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 16:06:35,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 16:06:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 16:06:35,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 16:06:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 16:06:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 16:06:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 16:06:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 16:06:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 16:06:35,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 16:06:35,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 16:06:35,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 16:06:35,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 16:06:35,690 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 16:06:35,743 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 16:06:35,744 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 16:06:35,839 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 16:06:35,859 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 16:06:35,859 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 16:06:35,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:06:35 BoogieIcfgContainer [2023-08-24 16:06:35,860 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 16:06:35,862 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 16:06:35,862 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 16:06:35,864 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 16:06:35,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 04:06:35" (1/3) ... [2023-08-24 16:06:35,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1902c90d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:06:35, skipping insertion in model container [2023-08-24 16:06:35,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:06:35" (2/3) ... [2023-08-24 16:06:35,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1902c90d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:06:35, skipping insertion in model container [2023-08-24 16:06:35,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:06:35" (3/3) ... [2023-08-24 16:06:35,865 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-08-24 16:06:35,875 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 16:06:35,875 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 16:06:35,876 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 16:06:35,938 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 16:06:35,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 77 transitions, 170 flow [2023-08-24 16:06:36,010 INFO L124 PetriNetUnfolderBase]: 6/75 cut-off events. [2023-08-24 16:06:36,010 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:06:36,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 6/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-08-24 16:06:36,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 77 transitions, 170 flow [2023-08-24 16:06:36,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 67 transitions, 146 flow [2023-08-24 16:06:36,024 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 16:06:36,029 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 67 transitions, 146 flow [2023-08-24 16:06:36,031 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 67 transitions, 146 flow [2023-08-24 16:06:36,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 67 transitions, 146 flow [2023-08-24 16:06:36,069 INFO L124 PetriNetUnfolderBase]: 6/67 cut-off events. [2023-08-24 16:06:36,069 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:06:36,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 67 events. 6/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-08-24 16:06:36,071 INFO L119 LiptonReduction]: Number of co-enabled transitions 436 [2023-08-24 16:06:37,998 INFO L134 LiptonReduction]: Checked pairs total: 452 [2023-08-24 16:06:37,999 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-24 16:06:38,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 16:06:38,013 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;@57336185, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 16:06:38,013 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 16:06:38,017 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 16:06:38,017 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-24 16:06:38,017 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:06:38,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:38,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:38,018 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 16:06:38,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:38,021 INFO L85 PathProgramCache]: Analyzing trace with hash 86937769, now seen corresponding path program 1 times [2023-08-24 16:06:38,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:38,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918962413] [2023-08-24 16:06:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:38,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:38,252 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 16:06:38,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:38,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918962413] [2023-08-24 16:06:38,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918962413] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:06:38,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:06:38,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 16:06:38,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918551825] [2023-08-24 16:06:38,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:06:38,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 16:06:38,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:38,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 16:06:38,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 16:06:38,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 138 [2023-08-24 16:06:38,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 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 16:06:38,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:38,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 138 [2023-08-24 16:06:38,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:38,323 INFO L124 PetriNetUnfolderBase]: 59/100 cut-off events. [2023-08-24 16:06:38,323 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-24 16:06:38,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 243 event pairs, 23 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2023-08-24 16:06:38,324 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-24 16:06:38,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-08-24 16:06:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 16:06:38,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 16:06:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 253 transitions. [2023-08-24 16:06:38,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-24 16:06:38,334 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 253 transitions. [2023-08-24 16:06:38,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 253 transitions. [2023-08-24 16:06:38,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:38,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 253 transitions. [2023-08-24 16:06:38,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 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 16:06:38,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 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 16:06:38,342 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 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 16:06:38,343 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 253 transitions. [2023-08-24 16:06:38,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-08-24 16:06:38,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 16:06:38,346 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-08-24 16:06:38,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-08-24 16:06:38,349 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-08-24 16:06:38,349 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-08-24 16:06:38,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 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 16:06:38,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:38,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:38,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 16:06:38,350 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 16:06:38,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:38,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1441172027, now seen corresponding path program 1 times [2023-08-24 16:06:38,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:38,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710949897] [2023-08-24 16:06:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:38,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:38,414 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 16:06:38,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:38,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710949897] [2023-08-24 16:06:38,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710949897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:06:38,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:06:38,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:06:38,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960426757] [2023-08-24 16:06:38,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:06:38,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:06:38,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:38,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:06:38,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:06:38,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 138 [2023-08-24 16:06:38,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 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 16:06:38,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:38,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 138 [2023-08-24 16:06:38,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:38,477 INFO L124 PetriNetUnfolderBase]: 86/161 cut-off events. [2023-08-24 16:06:38,478 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-08-24 16:06:38,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 161 events. 86/161 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 488 event pairs, 33 based on Foata normal form. 4/131 useless extension candidates. Maximal degree in co-relation 89. Up to 93 conditions per place. [2023-08-24 16:06:38,480 INFO L140 encePairwiseOnDemand]: 133/138 looper letters, 30 selfloop transitions, 3 changer transitions 6/39 dead transitions. [2023-08-24 16:06:38,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 39 transitions, 197 flow [2023-08-24 16:06:38,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:06:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:06:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 307 transitions. [2023-08-24 16:06:38,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4449275362318841 [2023-08-24 16:06:38,484 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 307 transitions. [2023-08-24 16:06:38,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 307 transitions. [2023-08-24 16:06:38,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:38,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 307 transitions. [2023-08-24 16:06:38,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 61.4) internal successors, (307), 5 states have internal predecessors, (307), 0 states have call successors, (0), 0 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 16:06:38,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 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 16:06:38,490 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 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 16:06:38,490 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 5 states and 307 transitions. [2023-08-24 16:06:38,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 39 transitions, 197 flow [2023-08-24 16:06:38,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 183 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-24 16:06:38,491 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 64 flow [2023-08-24 16:06:38,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=42, 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=64, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-24 16:06:38,492 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-24 16:06:38,492 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 64 flow [2023-08-24 16:06:38,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 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 16:06:38,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:38,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:38,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 16:06:38,493 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 16:06:38,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1846837317, now seen corresponding path program 2 times [2023-08-24 16:06:38,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:38,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370327198] [2023-08-24 16:06:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:38,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:38,558 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 16:06:38,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:38,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370327198] [2023-08-24 16:06:38,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370327198] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:38,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424235956] [2023-08-24 16:06:38,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:06:38,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:38,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:38,561 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 16:06:38,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 16:06:38,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 16:06:38,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:06:38,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-24 16:06:38,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:06:38,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 16:06:38,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424235956] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:06:38,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 16:06:38,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-24 16:06:38,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811412554] [2023-08-24 16:06:38,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:06:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 16:06:38,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:38,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 16:06:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 16:06:38,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 138 [2023-08-24 16:06:38,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:06:38,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:38,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 138 [2023-08-24 16:06:38,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:38,684 INFO L124 PetriNetUnfolderBase]: 51/94 cut-off events. [2023-08-24 16:06:38,684 INFO L125 PetriNetUnfolderBase]: For 66/73 co-relation queries the response was YES. [2023-08-24 16:06:38,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 94 events. 51/94 cut-off events. For 66/73 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 216 event pairs, 16 based on Foata normal form. 15/89 useless extension candidates. Maximal degree in co-relation 170. Up to 73 conditions per place. [2023-08-24 16:06:38,685 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-08-24 16:06:38,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 121 flow [2023-08-24 16:06:38,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 16:06:38,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 16:06:38,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2023-08-24 16:06:38,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365942028985507 [2023-08-24 16:06:38,686 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 241 transitions. [2023-08-24 16:06:38,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 241 transitions. [2023-08-24 16:06:38,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:38,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 241 transitions. [2023-08-24 16:06:38,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 16:06:38,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 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 16:06:38,688 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 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 16:06:38,688 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 64 flow. Second operand 4 states and 241 transitions. [2023-08-24 16:06:38,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 121 flow [2023-08-24 16:06:38,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-24 16:06:38,689 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2023-08-24 16:06:38,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-24 16:06:38,689 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-24 16:06:38,689 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2023-08-24 16:06:38,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:06:38,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:38,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:38,697 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 16:06:38,894 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 16:06:38,895 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 16:06:38,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:38,895 INFO L85 PathProgramCache]: Analyzing trace with hash -200595888, now seen corresponding path program 1 times [2023-08-24 16:06:38,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:38,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332898909] [2023-08-24 16:06:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:38,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:38,975 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 16:06:38,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:38,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332898909] [2023-08-24 16:06:38,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332898909] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:38,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244548786] [2023-08-24 16:06:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:38,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:38,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:38,993 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 16:06:39,001 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 16:06:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:39,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 16:06:39,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:39,090 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 16:06:39,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:39,113 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 16:06:39,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244548786] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:39,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:39,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-24 16:06:39,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78324008] [2023-08-24 16:06:39,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:39,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:06:39,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:39,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:06:39,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:06:39,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 138 [2023-08-24 16:06:39,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:06:39,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:39,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 138 [2023-08-24 16:06:39,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:39,151 INFO L124 PetriNetUnfolderBase]: 56/102 cut-off events. [2023-08-24 16:06:39,151 INFO L125 PetriNetUnfolderBase]: For 29/36 co-relation queries the response was YES. [2023-08-24 16:06:39,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 102 events. 56/102 cut-off events. For 29/36 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 215 event pairs, 9 based on Foata normal form. 7/91 useless extension candidates. Maximal degree in co-relation 94. Up to 79 conditions per place. [2023-08-24 16:06:39,152 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 25 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-08-24 16:06:39,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 31 transitions, 158 flow [2023-08-24 16:06:39,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:06:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:06:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 311 transitions. [2023-08-24 16:06:39,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45072463768115945 [2023-08-24 16:06:39,153 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 311 transitions. [2023-08-24 16:06:39,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 311 transitions. [2023-08-24 16:06:39,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:39,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 311 transitions. [2023-08-24 16:06:39,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 62.2) internal successors, (311), 5 states have internal predecessors, (311), 0 states have call successors, (0), 0 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 16:06:39,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 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 16:06:39,155 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 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 16:06:39,155 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 5 states and 311 transitions. [2023-08-24 16:06:39,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 31 transitions, 158 flow [2023-08-24 16:06:39,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 31 transitions, 150 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 16:06:39,156 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 83 flow [2023-08-24 16:06:39,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=83, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-24 16:06:39,156 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-08-24 16:06:39,157 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 83 flow [2023-08-24 16:06:39,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:06:39,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:39,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:39,164 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 16:06:39,361 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,SelfDestructingSolverStorable3 [2023-08-24 16:06:39,362 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 16:06:39,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:39,362 INFO L85 PathProgramCache]: Analyzing trace with hash -324422196, now seen corresponding path program 2 times [2023-08-24 16:06:39,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:39,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373142464] [2023-08-24 16:06:39,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:39,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:06:39,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:39,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373142464] [2023-08-24 16:06:39,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373142464] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:39,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674095473] [2023-08-24 16:06:39,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:06:39,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:39,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:39,501 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 16:06:39,541 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 16:06:39,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:06:39,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:06:39,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 16:06:39,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:06:39,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:06:39,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674095473] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:39,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:39,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 4 [2023-08-24 16:06:39,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677974190] [2023-08-24 16:06:39,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:39,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 16:06:39,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:39,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 16:06:39,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-24 16:06:39,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 138 [2023-08-24 16:06:39,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 83 flow. Second operand has 6 states, 6 states have (on average 67.5) internal successors, (405), 6 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 16:06:39,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:39,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 138 [2023-08-24 16:06:39,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:39,842 INFO L124 PetriNetUnfolderBase]: 97/179 cut-off events. [2023-08-24 16:06:39,842 INFO L125 PetriNetUnfolderBase]: For 277/306 co-relation queries the response was YES. [2023-08-24 16:06:39,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 179 events. 97/179 cut-off events. For 277/306 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 556 event pairs, 13 based on Foata normal form. 30/184 useless extension candidates. Maximal degree in co-relation 285. Up to 77 conditions per place. [2023-08-24 16:06:39,843 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 29 selfloop transitions, 8 changer transitions 4/43 dead transitions. [2023-08-24 16:06:39,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 43 transitions, 252 flow [2023-08-24 16:06:39,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 16:06:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 16:06:39,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2023-08-24 16:06:39,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271739130434783 [2023-08-24 16:06:39,845 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 291 transitions. [2023-08-24 16:06:39,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 291 transitions. [2023-08-24 16:06:39,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:39,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 291 transitions. [2023-08-24 16:06:39,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 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 16:06:39,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 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 16:06:39,846 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 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 16:06:39,846 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 83 flow. Second operand 4 states and 291 transitions. [2023-08-24 16:06:39,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 43 transitions, 252 flow [2023-08-24 16:06:39,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 43 transitions, 240 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-24 16:06:39,848 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 136 flow [2023-08-24 16:06:39,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2023-08-24 16:06:39,849 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2023-08-24 16:06:39,849 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 136 flow [2023-08-24 16:06:39,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.5) internal successors, (405), 6 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 16:06:39,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:39,849 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:39,873 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 16:06:40,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:40,055 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 16:06:40,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:40,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1927789895, now seen corresponding path program 3 times [2023-08-24 16:06:40,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:40,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479642487] [2023-08-24 16:06:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:40,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:40,162 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 16:06:40,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:40,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479642487] [2023-08-24 16:06:40,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479642487] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:40,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862263228] [2023-08-24 16:06:40,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:06:40,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:40,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:40,164 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 16:06:40,181 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 16:06:40,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 16:06:40,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:06:40,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 16:06:40,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:40,288 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 16:06:40,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:40,373 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 16:06:40,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862263228] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:40,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:40,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-24 16:06:40,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853560371] [2023-08-24 16:06:40,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:40,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 16:06:40,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:40,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 16:06:40,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-24 16:06:40,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:06:40,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 136 flow. Second operand has 16 states, 16 states have (on average 54.1875) internal successors, (867), 16 states have internal predecessors, (867), 0 states have call successors, (0), 0 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 16:06:40,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:40,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:06:40,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:40,575 INFO L124 PetriNetUnfolderBase]: 217/363 cut-off events. [2023-08-24 16:06:40,575 INFO L125 PetriNetUnfolderBase]: For 575/575 co-relation queries the response was YES. [2023-08-24 16:06:40,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1319 conditions, 363 events. 217/363 cut-off events. For 575/575 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1191 event pairs, 25 based on Foata normal form. 16/379 useless extension candidates. Maximal degree in co-relation 767. Up to 189 conditions per place. [2023-08-24 16:06:40,577 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 46 selfloop transitions, 40 changer transitions 0/86 dead transitions. [2023-08-24 16:06:40,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 86 transitions, 628 flow [2023-08-24 16:06:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 16:06:40,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 16:06:40,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 901 transitions. [2023-08-24 16:06:40,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40806159420289856 [2023-08-24 16:06:40,579 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 901 transitions. [2023-08-24 16:06:40,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 901 transitions. [2023-08-24 16:06:40,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:40,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 901 transitions. [2023-08-24 16:06:40,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.3125) internal successors, (901), 16 states have internal predecessors, (901), 0 states have call successors, (0), 0 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 16:06:40,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 138.0) internal successors, (2346), 17 states have internal predecessors, (2346), 0 states have call successors, (0), 0 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 16:06:40,583 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 138.0) internal successors, (2346), 17 states have internal predecessors, (2346), 0 states have call successors, (0), 0 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 16:06:40,583 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 136 flow. Second operand 16 states and 901 transitions. [2023-08-24 16:06:40,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 86 transitions, 628 flow [2023-08-24 16:06:40,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 86 transitions, 624 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-24 16:06:40,602 INFO L231 Difference]: Finished difference. Result has 53 places, 60 transitions, 502 flow [2023-08-24 16:06:40,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=502, PETRI_PLACES=53, PETRI_TRANSITIONS=60} [2023-08-24 16:06:40,603 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-08-24 16:06:40,603 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 60 transitions, 502 flow [2023-08-24 16:06:40,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.1875) internal successors, (867), 16 states have internal predecessors, (867), 0 states have call successors, (0), 0 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 16:06:40,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:40,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:40,621 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 16:06:40,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:40,808 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 16:06:40,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:40,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2089851327, now seen corresponding path program 4 times [2023-08-24 16:06:40,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:40,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33062204] [2023-08-24 16:06:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:40,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:40,925 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 16:06:40,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:40,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33062204] [2023-08-24 16:06:40,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33062204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:40,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934324427] [2023-08-24 16:06:40,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:06:40,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:40,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:40,930 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 16:06:40,931 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 16:06:40,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:06:40,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:06:40,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 16:06:40,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:41,018 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 16:06:41,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:41,074 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 16:06:41,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934324427] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:41,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:41,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-24 16:06:41,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353067250] [2023-08-24 16:06:41,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:41,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 16:06:41,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:41,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 16:06:41,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-08-24 16:06:41,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:06:41,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 60 transitions, 502 flow. Second operand has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 0 states have call successors, (0), 0 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 16:06:41,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:41,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:06:41,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:41,424 INFO L124 PetriNetUnfolderBase]: 307/514 cut-off events. [2023-08-24 16:06:41,424 INFO L125 PetriNetUnfolderBase]: For 1720/1720 co-relation queries the response was YES. [2023-08-24 16:06:41,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2527 conditions, 514 events. 307/514 cut-off events. For 1720/1720 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1893 event pairs, 7 based on Foata normal form. 12/526 useless extension candidates. Maximal degree in co-relation 1916. Up to 208 conditions per place. [2023-08-24 16:06:41,428 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 85 selfloop transitions, 68 changer transitions 24/177 dead transitions. [2023-08-24 16:06:41,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 177 transitions, 1605 flow [2023-08-24 16:06:41,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 16:06:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 16:06:41,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1316 transitions. [2023-08-24 16:06:41,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41461877756773785 [2023-08-24 16:06:41,431 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1316 transitions. [2023-08-24 16:06:41,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1316 transitions. [2023-08-24 16:06:41,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:41,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1316 transitions. [2023-08-24 16:06:41,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 57.21739130434783) internal successors, (1316), 23 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 16:06:41,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 138.0) internal successors, (3312), 24 states have internal predecessors, (3312), 0 states have call successors, (0), 0 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 16:06:41,451 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 138.0) internal successors, (3312), 24 states have internal predecessors, (3312), 0 states have call successors, (0), 0 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 16:06:41,451 INFO L175 Difference]: Start difference. First operand has 53 places, 60 transitions, 502 flow. Second operand 23 states and 1316 transitions. [2023-08-24 16:06:41,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 177 transitions, 1605 flow [2023-08-24 16:06:41,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 177 transitions, 1304 flow, removed 141 selfloop flow, removed 4 redundant places. [2023-08-24 16:06:41,477 INFO L231 Difference]: Finished difference. Result has 78 places, 100 transitions, 852 flow [2023-08-24 16:06:41,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=852, PETRI_PLACES=78, PETRI_TRANSITIONS=100} [2023-08-24 16:06:41,478 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 58 predicate places. [2023-08-24 16:06:41,479 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 100 transitions, 852 flow [2023-08-24 16:06:41,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 0 states have call successors, (0), 0 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 16:06:41,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:41,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:41,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 16:06:41,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:41,682 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 16:06:41,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:41,682 INFO L85 PathProgramCache]: Analyzing trace with hash -198914523, now seen corresponding path program 5 times [2023-08-24 16:06:41,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:41,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507376801] [2023-08-24 16:06:41,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:41,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:41,802 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 16:06:41,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:41,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507376801] [2023-08-24 16:06:41,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507376801] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:41,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371774248] [2023-08-24 16:06:41,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:06:41,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:41,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:41,803 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 16:06:41,805 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 16:06:41,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:06:41,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:06:41,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 16:06:41,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:41,912 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 16:06:41,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:41,993 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 16:06:41,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371774248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:41,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:41,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 16:06:41,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379776071] [2023-08-24 16:06:41,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:41,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:06:41,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:41,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:06:41,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:06:41,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:06:41,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 100 transitions, 852 flow. Second operand has 17 states, 17 states have (on average 54.529411764705884) internal successors, (927), 17 states have internal predecessors, (927), 0 states have call successors, (0), 0 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 16:06:41,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:41,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:06:41,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:42,363 INFO L124 PetriNetUnfolderBase]: 365/615 cut-off events. [2023-08-24 16:06:42,364 INFO L125 PetriNetUnfolderBase]: For 2763/2763 co-relation queries the response was YES. [2023-08-24 16:06:42,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3279 conditions, 615 events. 365/615 cut-off events. For 2763/2763 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2424 event pairs, 7 based on Foata normal form. 30/645 useless extension candidates. Maximal degree in co-relation 2662. Up to 266 conditions per place. [2023-08-24 16:06:42,368 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 73 selfloop transitions, 105 changer transitions 1/179 dead transitions. [2023-08-24 16:06:42,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 179 transitions, 1833 flow [2023-08-24 16:06:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 16:06:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 16:06:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1135 transitions. [2023-08-24 16:06:42,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.411231884057971 [2023-08-24 16:06:42,370 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1135 transitions. [2023-08-24 16:06:42,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1135 transitions. [2023-08-24 16:06:42,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:42,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1135 transitions. [2023-08-24 16:06:42,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 56.75) internal successors, (1135), 20 states have internal predecessors, (1135), 0 states have call successors, (0), 0 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 16:06:42,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 138.0) internal successors, (2898), 21 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:06:42,376 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 138.0) internal successors, (2898), 21 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:06:42,376 INFO L175 Difference]: Start difference. First operand has 78 places, 100 transitions, 852 flow. Second operand 20 states and 1135 transitions. [2023-08-24 16:06:42,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 179 transitions, 1833 flow [2023-08-24 16:06:42,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 179 transitions, 1573 flow, removed 117 selfloop flow, removed 5 redundant places. [2023-08-24 16:06:42,387 INFO L231 Difference]: Finished difference. Result has 103 places, 140 transitions, 1446 flow [2023-08-24 16:06:42,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1446, PETRI_PLACES=103, PETRI_TRANSITIONS=140} [2023-08-24 16:06:42,387 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 83 predicate places. [2023-08-24 16:06:42,387 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 140 transitions, 1446 flow [2023-08-24 16:06:42,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.529411764705884) internal successors, (927), 17 states have internal predecessors, (927), 0 states have call successors, (0), 0 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 16:06:42,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:42,388 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:42,395 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 16:06:42,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:42,593 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 16:06:42,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:42,593 INFO L85 PathProgramCache]: Analyzing trace with hash -254558235, now seen corresponding path program 6 times [2023-08-24 16:06:42,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:42,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203771162] [2023-08-24 16:06:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:42,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:42,669 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 16:06:42,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:42,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203771162] [2023-08-24 16:06:42,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203771162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:42,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776133679] [2023-08-24 16:06:42,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:06:42,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:42,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:42,686 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 16:06:42,687 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 16:06:42,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 16:06:42,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:06:42,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 16:06:42,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:42,799 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 16:06:42,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:42,879 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 16:06:42,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776133679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:42,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:42,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 16:06:42,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566485175] [2023-08-24 16:06:42,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:42,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 16:06:42,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:42,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 16:06:42,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-24 16:06:42,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:06:42,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 140 transitions, 1446 flow. Second operand has 16 states, 16 states have (on average 54.25) internal successors, (868), 16 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 16:06:42,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:42,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:06:42,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:43,244 INFO L124 PetriNetUnfolderBase]: 425/711 cut-off events. [2023-08-24 16:06:43,244 INFO L125 PetriNetUnfolderBase]: For 8479/8479 co-relation queries the response was YES. [2023-08-24 16:06:43,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4651 conditions, 711 events. 425/711 cut-off events. For 8479/8479 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2921 event pairs, 10 based on Foata normal form. 22/733 useless extension candidates. Maximal degree in co-relation 4347. Up to 307 conditions per place. [2023-08-24 16:06:43,250 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 82 selfloop transitions, 121 changer transitions 0/203 dead transitions. [2023-08-24 16:06:43,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 203 transitions, 2533 flow [2023-08-24 16:06:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 16:06:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 16:06:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1016 transitions. [2023-08-24 16:06:43,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40901771336553944 [2023-08-24 16:06:43,253 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1016 transitions. [2023-08-24 16:06:43,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1016 transitions. [2023-08-24 16:06:43,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:43,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1016 transitions. [2023-08-24 16:06:43,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 56.44444444444444) internal successors, (1016), 18 states have internal predecessors, (1016), 0 states have call successors, (0), 0 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 16:06:43,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 138.0) internal successors, (2622), 19 states have internal predecessors, (2622), 0 states have call successors, (0), 0 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 16:06:43,257 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 138.0) internal successors, (2622), 19 states have internal predecessors, (2622), 0 states have call successors, (0), 0 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 16:06:43,257 INFO L175 Difference]: Start difference. First operand has 103 places, 140 transitions, 1446 flow. Second operand 18 states and 1016 transitions. [2023-08-24 16:06:43,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 203 transitions, 2533 flow [2023-08-24 16:06:43,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 203 transitions, 2372 flow, removed 71 selfloop flow, removed 5 redundant places. [2023-08-24 16:06:43,296 INFO L231 Difference]: Finished difference. Result has 120 places, 172 transitions, 2083 flow [2023-08-24 16:06:43,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2083, PETRI_PLACES=120, PETRI_TRANSITIONS=172} [2023-08-24 16:06:43,296 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 100 predicate places. [2023-08-24 16:06:43,296 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 172 transitions, 2083 flow [2023-08-24 16:06:43,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.25) internal successors, (868), 16 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 16:06:43,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:43,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:43,307 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 16:06:43,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:43,502 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 16:06:43,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:43,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1973496587, now seen corresponding path program 7 times [2023-08-24 16:06:43,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:43,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022637861] [2023-08-24 16:06:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:43,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:43,592 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 16:06:43,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:43,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022637861] [2023-08-24 16:06:43,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022637861] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:43,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893466986] [2023-08-24 16:06:43,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:06:43,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:43,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:43,594 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 16:06:43,609 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 16:06:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:43,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 16:06:43,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:43,696 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 16:06:43,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:43,761 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 16:06:43,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893466986] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:43,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:43,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 16:06:43,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267447818] [2023-08-24 16:06:43,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:43,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 16:06:43,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:43,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 16:06:43,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-08-24 16:06:43,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:06:43,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 172 transitions, 2083 flow. Second operand has 16 states, 16 states have (on average 54.25) internal successors, (868), 16 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 16:06:43,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:43,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:06:43,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:44,139 INFO L124 PetriNetUnfolderBase]: 426/738 cut-off events. [2023-08-24 16:06:44,139 INFO L125 PetriNetUnfolderBase]: For 11501/11501 co-relation queries the response was YES. [2023-08-24 16:06:44,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4826 conditions, 738 events. 426/738 cut-off events. For 11501/11501 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3218 event pairs, 9 based on Foata normal form. 38/776 useless extension candidates. Maximal degree in co-relation 4466. Up to 262 conditions per place. [2023-08-24 16:06:44,144 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 77 selfloop transitions, 136 changer transitions 1/214 dead transitions. [2023-08-24 16:06:44,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 214 transitions, 2721 flow [2023-08-24 16:06:44,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 16:06:44,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 16:06:44,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1299 transitions. [2023-08-24 16:06:44,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40926275992438566 [2023-08-24 16:06:44,147 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1299 transitions. [2023-08-24 16:06:44,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1299 transitions. [2023-08-24 16:06:44,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:44,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1299 transitions. [2023-08-24 16:06:44,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 56.47826086956522) internal successors, (1299), 23 states have internal predecessors, (1299), 0 states have call successors, (0), 0 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 16:06:44,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 138.0) internal successors, (3312), 24 states have internal predecessors, (3312), 0 states have call successors, (0), 0 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 16:06:44,152 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 138.0) internal successors, (3312), 24 states have internal predecessors, (3312), 0 states have call successors, (0), 0 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 16:06:44,152 INFO L175 Difference]: Start difference. First operand has 120 places, 172 transitions, 2083 flow. Second operand 23 states and 1299 transitions. [2023-08-24 16:06:44,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 214 transitions, 2721 flow [2023-08-24 16:06:44,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 214 transitions, 2404 flow, removed 145 selfloop flow, removed 7 redundant places. [2023-08-24 16:06:44,182 INFO L231 Difference]: Finished difference. Result has 136 places, 175 transitions, 2103 flow [2023-08-24 16:06:44,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=1702, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2103, PETRI_PLACES=136, PETRI_TRANSITIONS=175} [2023-08-24 16:06:44,182 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 116 predicate places. [2023-08-24 16:06:44,182 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 175 transitions, 2103 flow [2023-08-24 16:06:44,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.25) internal successors, (868), 16 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 16:06:44,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:44,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:44,201 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 16:06:44,387 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,SelfDestructingSolverStorable9 [2023-08-24 16:06:44,387 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 16:06:44,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash 396752969, now seen corresponding path program 8 times [2023-08-24 16:06:44,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:44,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462008794] [2023-08-24 16:06:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:44,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:44,472 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 16:06:44,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:44,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462008794] [2023-08-24 16:06:44,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462008794] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:44,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69839694] [2023-08-24 16:06:44,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:06:44,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:44,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:44,473 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 16:06:44,475 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 16:06:44,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:06:44,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:06:44,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 16:06:44,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:44,602 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 16:06:44,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:44,679 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 16:06:44,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69839694] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:44,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:44,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-24 16:06:44,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57378956] [2023-08-24 16:06:44,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:44,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:06:44,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:44,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:06:44,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:06:44,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:06:44,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 175 transitions, 2103 flow. Second operand has 18 states, 18 states have (on average 54.27777777777778) internal successors, (977), 18 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:06:44,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:44,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:06:44,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:45,120 INFO L124 PetriNetUnfolderBase]: 605/1055 cut-off events. [2023-08-24 16:06:45,120 INFO L125 PetriNetUnfolderBase]: For 5731/5731 co-relation queries the response was YES. [2023-08-24 16:06:45,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6455 conditions, 1055 events. 605/1055 cut-off events. For 5731/5731 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5139 event pairs, 7 based on Foata normal form. 12/1067 useless extension candidates. Maximal degree in co-relation 6206. Up to 333 conditions per place. [2023-08-24 16:06:45,128 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 127 selfloop transitions, 175 changer transitions 1/303 dead transitions. [2023-08-24 16:06:45,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 303 transitions, 3878 flow [2023-08-24 16:06:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 16:06:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 16:06:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1631 transitions. [2023-08-24 16:06:45,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40754622688655673 [2023-08-24 16:06:45,130 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1631 transitions. [2023-08-24 16:06:45,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1631 transitions. [2023-08-24 16:06:45,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:45,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1631 transitions. [2023-08-24 16:06:45,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 56.241379310344826) internal successors, (1631), 29 states have internal predecessors, (1631), 0 states have call successors, (0), 0 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 16:06:45,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 138.0) internal successors, (4140), 30 states have internal predecessors, (4140), 0 states have call successors, (0), 0 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 16:06:45,136 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 138.0) internal successors, (4140), 30 states have internal predecessors, (4140), 0 states have call successors, (0), 0 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 16:06:45,136 INFO L175 Difference]: Start difference. First operand has 136 places, 175 transitions, 2103 flow. Second operand 29 states and 1631 transitions. [2023-08-24 16:06:45,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 303 transitions, 3878 flow [2023-08-24 16:06:45,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 303 transitions, 3570 flow, removed 15 selfloop flow, removed 18 redundant places. [2023-08-24 16:06:45,158 INFO L231 Difference]: Finished difference. Result has 153 places, 251 transitions, 3302 flow [2023-08-24 16:06:45,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3302, PETRI_PLACES=153, PETRI_TRANSITIONS=251} [2023-08-24 16:06:45,158 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-08-24 16:06:45,159 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 251 transitions, 3302 flow [2023-08-24 16:06:45,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.27777777777778) internal successors, (977), 18 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:06:45,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:45,159 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:45,176 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 16:06:45,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:45,364 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 16:06:45,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:45,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1674747507, now seen corresponding path program 9 times [2023-08-24 16:06:45,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:45,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760608415] [2023-08-24 16:06:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:45,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:45,473 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 16:06:45,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:45,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760608415] [2023-08-24 16:06:45,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760608415] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:45,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674574989] [2023-08-24 16:06:45,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:06:45,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:45,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:45,488 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 16:06:45,511 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 16:06:45,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 16:06:45,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:06:45,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 16:06:45,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:45,642 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 16:06:45,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:45,711 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 16:06:45,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674574989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:45,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:45,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-24 16:06:45,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141684786] [2023-08-24 16:06:45,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:45,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:06:45,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:45,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:06:45,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:06:45,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:06:45,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 251 transitions, 3302 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 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 16:06:45,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:45,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:06:45,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:46,246 INFO L124 PetriNetUnfolderBase]: 622/1086 cut-off events. [2023-08-24 16:06:46,246 INFO L125 PetriNetUnfolderBase]: For 8368/8368 co-relation queries the response was YES. [2023-08-24 16:06:46,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7325 conditions, 1086 events. 622/1086 cut-off events. For 8368/8368 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5295 event pairs, 15 based on Foata normal form. 56/1142 useless extension candidates. Maximal degree in co-relation 7098. Up to 791 conditions per place. [2023-08-24 16:06:46,255 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 218 selfloop transitions, 89 changer transitions 2/309 dead transitions. [2023-08-24 16:06:46,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 309 transitions, 4371 flow [2023-08-24 16:06:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 16:06:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 16:06:46,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1360 transitions. [2023-08-24 16:06:46,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106280193236715 [2023-08-24 16:06:46,258 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1360 transitions. [2023-08-24 16:06:46,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1360 transitions. [2023-08-24 16:06:46,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:46,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1360 transitions. [2023-08-24 16:06:46,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 56.666666666666664) internal successors, (1360), 24 states have internal predecessors, (1360), 0 states have call successors, (0), 0 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 16:06:46,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 138.0) internal successors, (3450), 25 states have internal predecessors, (3450), 0 states have call successors, (0), 0 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 16:06:46,263 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 138.0) internal successors, (3450), 25 states have internal predecessors, (3450), 0 states have call successors, (0), 0 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 16:06:46,263 INFO L175 Difference]: Start difference. First operand has 153 places, 251 transitions, 3302 flow. Second operand 24 states and 1360 transitions. [2023-08-24 16:06:46,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 309 transitions, 4371 flow [2023-08-24 16:06:46,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 309 transitions, 4134 flow, removed 77 selfloop flow, removed 17 redundant places. [2023-08-24 16:06:46,301 INFO L231 Difference]: Finished difference. Result has 165 places, 265 transitions, 3556 flow [2023-08-24 16:06:46,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=3005, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3556, PETRI_PLACES=165, PETRI_TRANSITIONS=265} [2023-08-24 16:06:46,302 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 145 predicate places. [2023-08-24 16:06:46,302 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 265 transitions, 3556 flow [2023-08-24 16:06:46,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 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 16:06:46,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:46,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:46,309 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 16:06:46,507 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,SelfDestructingSolverStorable11 [2023-08-24 16:06:46,507 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 16:06:46,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:46,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1742915027, now seen corresponding path program 10 times [2023-08-24 16:06:46,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:46,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844700585] [2023-08-24 16:06:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:46,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:06:46,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:46,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844700585] [2023-08-24 16:06:46,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844700585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:46,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551376271] [2023-08-24 16:06:46,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:06:46,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:46,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:46,598 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 16:06:46,599 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 16:06:46,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:06:46,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:06:46,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 16:06:46,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:06:46,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:06:46,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551376271] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:46,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:46,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 8 [2023-08-24 16:06:46,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821906167] [2023-08-24 16:06:46,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:46,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 16:06:46,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:46,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 16:06:46,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-08-24 16:06:46,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 138 [2023-08-24 16:06:46,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 265 transitions, 3556 flow. Second operand has 10 states, 10 states have (on average 59.2) internal successors, (592), 10 states have internal predecessors, (592), 0 states have call successors, (0), 0 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 16:06:46,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:46,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 138 [2023-08-24 16:06:46,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:47,054 INFO L124 PetriNetUnfolderBase]: 924/1606 cut-off events. [2023-08-24 16:06:47,054 INFO L125 PetriNetUnfolderBase]: For 12191/12195 co-relation queries the response was YES. [2023-08-24 16:06:47,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11143 conditions, 1606 events. 924/1606 cut-off events. For 12191/12195 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 8621 event pairs, 26 based on Foata normal form. 1/1607 useless extension candidates. Maximal degree in co-relation 10640. Up to 833 conditions per place. [2023-08-24 16:06:47,070 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 270 selfloop transitions, 109 changer transitions 54/436 dead transitions. [2023-08-24 16:06:47,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 436 transitions, 6601 flow [2023-08-24 16:06:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 16:06:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 16:06:47,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 389 transitions. [2023-08-24 16:06:47,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46980676328502413 [2023-08-24 16:06:47,071 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 389 transitions. [2023-08-24 16:06:47,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 389 transitions. [2023-08-24 16:06:47,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:47,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 389 transitions. [2023-08-24 16:06:47,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.83333333333333) internal successors, (389), 6 states have internal predecessors, (389), 0 states have call successors, (0), 0 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 16:06:47,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 138.0) internal successors, (966), 7 states have internal predecessors, (966), 0 states have call successors, (0), 0 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 16:06:47,073 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 138.0) internal successors, (966), 7 states have internal predecessors, (966), 0 states have call successors, (0), 0 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 16:06:47,073 INFO L175 Difference]: Start difference. First operand has 165 places, 265 transitions, 3556 flow. Second operand 6 states and 389 transitions. [2023-08-24 16:06:47,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 436 transitions, 6601 flow [2023-08-24 16:06:47,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 436 transitions, 6283 flow, removed 128 selfloop flow, removed 6 redundant places. [2023-08-24 16:06:47,131 INFO L231 Difference]: Finished difference. Result has 166 places, 326 transitions, 4691 flow [2023-08-24 16:06:47,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=3374, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4691, PETRI_PLACES=166, PETRI_TRANSITIONS=326} [2023-08-24 16:06:47,132 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 146 predicate places. [2023-08-24 16:06:47,132 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 326 transitions, 4691 flow [2023-08-24 16:06:47,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.2) internal successors, (592), 10 states have internal predecessors, (592), 0 states have call successors, (0), 0 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 16:06:47,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:47,132 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:47,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-24 16:06:47,337 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,SelfDestructingSolverStorable12 [2023-08-24 16:06:47,337 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 16:06:47,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:47,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1056493565, now seen corresponding path program 11 times [2023-08-24 16:06:47,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:47,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657832408] [2023-08-24 16:06:47,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:47,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:06:47,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:47,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657832408] [2023-08-24 16:06:47,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657832408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:47,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570154005] [2023-08-24 16:06:47,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:06:47,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:47,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:47,472 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 16:06:47,473 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 16:06:47,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 16:06:47,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:06:47,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 16:06:47,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:06:47,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:06:47,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570154005] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:47,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:47,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 12 [2023-08-24 16:06:47,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888770011] [2023-08-24 16:06:47,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:47,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 16:06:47,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:47,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 16:06:47,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-08-24 16:06:47,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:06:47,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 326 transitions, 4691 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 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 16:06:47,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:47,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:06:47,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:48,114 INFO L124 PetriNetUnfolderBase]: 900/1599 cut-off events. [2023-08-24 16:06:48,114 INFO L125 PetriNetUnfolderBase]: For 14244/14244 co-relation queries the response was YES. [2023-08-24 16:06:48,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11662 conditions, 1599 events. 900/1599 cut-off events. For 14244/14244 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 8792 event pairs, 41 based on Foata normal form. 34/1633 useless extension candidates. Maximal degree in co-relation 11174. Up to 1238 conditions per place. [2023-08-24 16:06:48,133 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 301 selfloop transitions, 83 changer transitions 26/410 dead transitions. [2023-08-24 16:06:48,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 410 transitions, 6394 flow [2023-08-24 16:06:48,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 16:06:48,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 16:06:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1092 transitions. [2023-08-24 16:06:48,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41647597254004576 [2023-08-24 16:06:48,135 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1092 transitions. [2023-08-24 16:06:48,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1092 transitions. [2023-08-24 16:06:48,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:48,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1092 transitions. [2023-08-24 16:06:48,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 57.473684210526315) internal successors, (1092), 19 states have internal predecessors, (1092), 0 states have call successors, (0), 0 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 16:06:48,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 138.0) internal successors, (2760), 20 states have internal predecessors, (2760), 0 states have call successors, (0), 0 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 16:06:48,140 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 138.0) internal successors, (2760), 20 states have internal predecessors, (2760), 0 states have call successors, (0), 0 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 16:06:48,140 INFO L175 Difference]: Start difference. First operand has 166 places, 326 transitions, 4691 flow. Second operand 19 states and 1092 transitions. [2023-08-24 16:06:48,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 410 transitions, 6394 flow [2023-08-24 16:06:48,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 410 transitions, 6327 flow, removed 30 selfloop flow, removed 1 redundant places. [2023-08-24 16:06:48,201 INFO L231 Difference]: Finished difference. Result has 190 places, 343 transitions, 5214 flow [2023-08-24 16:06:48,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=4644, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5214, PETRI_PLACES=190, PETRI_TRANSITIONS=343} [2023-08-24 16:06:48,203 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 170 predicate places. [2023-08-24 16:06:48,203 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 343 transitions, 5214 flow [2023-08-24 16:06:48,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 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 16:06:48,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:48,203 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:48,211 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 16:06:48,405 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,SelfDestructingSolverStorable13 [2023-08-24 16:06:48,405 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 16:06:48,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:48,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1295051786, now seen corresponding path program 12 times [2023-08-24 16:06:48,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:48,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634652137] [2023-08-24 16:06:48,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:48,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:48,508 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 16:06:48,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:48,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634652137] [2023-08-24 16:06:48,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634652137] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:48,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986357379] [2023-08-24 16:06:48,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:06:48,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:48,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:48,509 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 16:06:48,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 16:06:48,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 16:06:48,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:06:48,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:06:48,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:48,640 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 16:06:48,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:48,825 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 16:06:48,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986357379] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:48,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:48,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-24 16:06:48,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041658488] [2023-08-24 16:06:48,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:48,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 16:06:48,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:48,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 16:06:48,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-08-24 16:06:48,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:06:48,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 343 transitions, 5214 flow. Second operand has 21 states, 21 states have (on average 54.19047619047619) internal successors, (1138), 21 states have internal predecessors, (1138), 0 states have call successors, (0), 0 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 16:06:48,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:48,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:06:48,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:49,625 INFO L124 PetriNetUnfolderBase]: 1163/2054 cut-off events. [2023-08-24 16:06:49,625 INFO L125 PetriNetUnfolderBase]: For 21763/21763 co-relation queries the response was YES. [2023-08-24 16:06:49,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15544 conditions, 2054 events. 1163/2054 cut-off events. For 21763/21763 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 11836 event pairs, 14 based on Foata normal form. 18/2072 useless extension candidates. Maximal degree in co-relation 14864. Up to 628 conditions per place. [2023-08-24 16:06:49,641 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 141 selfloop transitions, 395 changer transitions 48/584 dead transitions. [2023-08-24 16:06:49,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 584 transitions, 9353 flow [2023-08-24 16:06:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 16:06:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 16:06:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1927 transitions. [2023-08-24 16:06:49,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106990622335891 [2023-08-24 16:06:49,643 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1927 transitions. [2023-08-24 16:06:49,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1927 transitions. [2023-08-24 16:06:49,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:49,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1927 transitions. [2023-08-24 16:06:49,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 56.6764705882353) internal successors, (1927), 34 states have internal predecessors, (1927), 0 states have call successors, (0), 0 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 16:06:49,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 138.0) internal successors, (4830), 35 states have internal predecessors, (4830), 0 states have call successors, (0), 0 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 16:06:49,650 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 138.0) internal successors, (4830), 35 states have internal predecessors, (4830), 0 states have call successors, (0), 0 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 16:06:49,650 INFO L175 Difference]: Start difference. First operand has 190 places, 343 transitions, 5214 flow. Second operand 34 states and 1927 transitions. [2023-08-24 16:06:49,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 584 transitions, 9353 flow [2023-08-24 16:06:49,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 584 transitions, 9114 flow, removed 49 selfloop flow, removed 9 redundant places. [2023-08-24 16:06:49,750 INFO L231 Difference]: Finished difference. Result has 224 places, 460 transitions, 8211 flow [2023-08-24 16:06:49,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=5021, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8211, PETRI_PLACES=224, PETRI_TRANSITIONS=460} [2023-08-24 16:06:49,750 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 204 predicate places. [2023-08-24 16:06:49,750 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 460 transitions, 8211 flow [2023-08-24 16:06:49,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.19047619047619) internal successors, (1138), 21 states have internal predecessors, (1138), 0 states have call successors, (0), 0 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 16:06:49,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:49,751 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:49,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-24 16:06:49,955 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,SelfDestructingSolverStorable14 [2023-08-24 16:06:49,955 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 16:06:49,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:49,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1723121364, now seen corresponding path program 13 times [2023-08-24 16:06:49,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:49,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369100199] [2023-08-24 16:06:49,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:49,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:50,058 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 16:06:50,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:50,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369100199] [2023-08-24 16:06:50,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369100199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:50,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549201732] [2023-08-24 16:06:50,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:06:50,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:50,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:50,059 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 16:06:50,062 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 16:06:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:50,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:06:50,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:50,188 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 16:06:50,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:50,318 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 16:06:50,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549201732] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:50,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:50,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-24 16:06:50,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69390128] [2023-08-24 16:06:50,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:50,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 16:06:50,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:50,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 16:06:50,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-08-24 16:06:50,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:06:50,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 460 transitions, 8211 flow. Second operand has 22 states, 22 states have (on average 54.04545454545455) internal successors, (1189), 22 states have internal predecessors, (1189), 0 states have call successors, (0), 0 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 16:06:50,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:50,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:06:50,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:51,164 INFO L124 PetriNetUnfolderBase]: 1294/2233 cut-off events. [2023-08-24 16:06:51,164 INFO L125 PetriNetUnfolderBase]: For 34360/34360 co-relation queries the response was YES. [2023-08-24 16:06:51,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19576 conditions, 2233 events. 1294/2233 cut-off events. For 34360/34360 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 12611 event pairs, 15 based on Foata normal form. 54/2287 useless extension candidates. Maximal degree in co-relation 18879. Up to 627 conditions per place. [2023-08-24 16:06:51,184 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 153 selfloop transitions, 449 changer transitions 15/617 dead transitions. [2023-08-24 16:06:51,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 617 transitions, 11789 flow [2023-08-24 16:06:51,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 16:06:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 16:06:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1866 transitions. [2023-08-24 16:06:51,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40974967061923584 [2023-08-24 16:06:51,187 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1866 transitions. [2023-08-24 16:06:51,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1866 transitions. [2023-08-24 16:06:51,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:51,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1866 transitions. [2023-08-24 16:06:51,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 56.54545454545455) internal successors, (1866), 33 states have internal predecessors, (1866), 0 states have call successors, (0), 0 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 16:06:51,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 138.0) internal successors, (4692), 34 states have internal predecessors, (4692), 0 states have call successors, (0), 0 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 16:06:51,194 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 138.0) internal successors, (4692), 34 states have internal predecessors, (4692), 0 states have call successors, (0), 0 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 16:06:51,194 INFO L175 Difference]: Start difference. First operand has 224 places, 460 transitions, 8211 flow. Second operand 33 states and 1866 transitions. [2023-08-24 16:06:51,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 617 transitions, 11789 flow [2023-08-24 16:06:51,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 617 transitions, 10958 flow, removed 377 selfloop flow, removed 11 redundant places. [2023-08-24 16:06:51,358 INFO L231 Difference]: Finished difference. Result has 254 places, 536 transitions, 10318 flow [2023-08-24 16:06:51,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=7662, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10318, PETRI_PLACES=254, PETRI_TRANSITIONS=536} [2023-08-24 16:06:51,359 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 234 predicate places. [2023-08-24 16:06:51,359 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 536 transitions, 10318 flow [2023-08-24 16:06:51,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.04545454545455) internal successors, (1189), 22 states have internal predecessors, (1189), 0 states have call successors, (0), 0 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 16:06:51,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:51,359 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:51,364 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 16:06:51,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:51,564 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 16:06:51,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:51,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1898634790, now seen corresponding path program 14 times [2023-08-24 16:06:51,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:51,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642872056] [2023-08-24 16:06:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:51,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:51,654 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 16:06:51,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:51,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642872056] [2023-08-24 16:06:51,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642872056] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:51,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892746534] [2023-08-24 16:06:51,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:06:51,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:51,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:51,656 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 16:06:51,658 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 16:06:51,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:06:51,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:06:51,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 16:06:51,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:51,782 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 16:06:51,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:51,940 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 16:06:51,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892746534] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:51,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:51,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-24 16:06:51,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582817056] [2023-08-24 16:06:51,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:51,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 16:06:51,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 16:06:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-08-24 16:06:51,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:06:51,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 536 transitions, 10318 flow. Second operand has 21 states, 21 states have (on average 53.95238095238095) internal successors, (1133), 21 states have internal predecessors, (1133), 0 states have call successors, (0), 0 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 16:06:51,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:51,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:06:51,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:52,815 INFO L124 PetriNetUnfolderBase]: 1426/2423 cut-off events. [2023-08-24 16:06:52,816 INFO L125 PetriNetUnfolderBase]: For 41123/41123 co-relation queries the response was YES. [2023-08-24 16:06:52,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22361 conditions, 2423 events. 1426/2423 cut-off events. For 41123/41123 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 13656 event pairs, 44 based on Foata normal form. 32/2455 useless extension candidates. Maximal degree in co-relation 21495. Up to 1145 conditions per place. [2023-08-24 16:06:52,839 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 187 selfloop transitions, 464 changer transitions 7/658 dead transitions. [2023-08-24 16:06:52,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 658 transitions, 13639 flow [2023-08-24 16:06:52,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 16:06:52,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 16:06:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1519 transitions. [2023-08-24 16:06:52,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076757917337627 [2023-08-24 16:06:52,842 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1519 transitions. [2023-08-24 16:06:52,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1519 transitions. [2023-08-24 16:06:52,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:52,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1519 transitions. [2023-08-24 16:06:52,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 56.25925925925926) internal successors, (1519), 27 states have internal predecessors, (1519), 0 states have call successors, (0), 0 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 16:06:52,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 138.0) internal successors, (3864), 28 states have internal predecessors, (3864), 0 states have call successors, (0), 0 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 16:06:52,847 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 138.0) internal successors, (3864), 28 states have internal predecessors, (3864), 0 states have call successors, (0), 0 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 16:06:52,847 INFO L175 Difference]: Start difference. First operand has 254 places, 536 transitions, 10318 flow. Second operand 27 states and 1519 transitions. [2023-08-24 16:06:52,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 658 transitions, 13639 flow [2023-08-24 16:06:53,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 658 transitions, 13262 flow, removed 123 selfloop flow, removed 14 redundant places. [2023-08-24 16:06:53,152 INFO L231 Difference]: Finished difference. Result has 271 places, 609 transitions, 12747 flow [2023-08-24 16:06:53,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=9955, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12747, PETRI_PLACES=271, PETRI_TRANSITIONS=609} [2023-08-24 16:06:53,152 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 251 predicate places. [2023-08-24 16:06:53,152 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 609 transitions, 12747 flow [2023-08-24 16:06:53,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.95238095238095) internal successors, (1133), 21 states have internal predecessors, (1133), 0 states have call successors, (0), 0 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 16:06:53,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:53,153 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:53,157 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 16:06:53,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 16:06:53,357 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 16:06:53,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:53,357 INFO L85 PathProgramCache]: Analyzing trace with hash -808241108, now seen corresponding path program 15 times [2023-08-24 16:06:53,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:53,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989820731] [2023-08-24 16:06:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:53,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:53,459 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 16:06:53,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:53,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989820731] [2023-08-24 16:06:53,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989820731] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:53,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589361949] [2023-08-24 16:06:53,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:06:53,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:53,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:53,460 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 16:06:53,488 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 16:06:53,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 16:06:53,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:06:53,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 16:06:53,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:53,637 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 16:06:53,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:53,709 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 16:06:53,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589361949] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:53,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:53,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-24 16:06:53,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841130932] [2023-08-24 16:06:53,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:53,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 16:06:53,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:53,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 16:06:53,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-08-24 16:06:53,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:06:53,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 609 transitions, 12747 flow. Second operand has 20 states, 20 states have (on average 54.05) internal successors, (1081), 20 states have internal predecessors, (1081), 0 states have call successors, (0), 0 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 16:06:53,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:53,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:06:53,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:54,694 INFO L124 PetriNetUnfolderBase]: 1527/2632 cut-off events. [2023-08-24 16:06:54,694 INFO L125 PetriNetUnfolderBase]: For 51105/51105 co-relation queries the response was YES. [2023-08-24 16:06:54,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25624 conditions, 2632 events. 1527/2632 cut-off events. For 51105/51105 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15268 event pairs, 23 based on Foata normal form. 18/2650 useless extension candidates. Maximal degree in co-relation 24759. Up to 766 conditions per place. [2023-08-24 16:06:54,719 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 329 selfloop transitions, 446 changer transitions 0/775 dead transitions. [2023-08-24 16:06:54,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 775 transitions, 16838 flow [2023-08-24 16:06:54,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 16:06:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 16:06:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2081 transitions. [2023-08-24 16:06:54,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075597336466902 [2023-08-24 16:06:54,723 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2081 transitions. [2023-08-24 16:06:54,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2081 transitions. [2023-08-24 16:06:54,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:54,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2081 transitions. [2023-08-24 16:06:54,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 56.24324324324324) internal successors, (2081), 37 states have internal predecessors, (2081), 0 states have call successors, (0), 0 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 16:06:54,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 138.0) internal successors, (5244), 38 states have internal predecessors, (5244), 0 states have call successors, (0), 0 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 16:06:54,731 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 138.0) internal successors, (5244), 38 states have internal predecessors, (5244), 0 states have call successors, (0), 0 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 16:06:54,731 INFO L175 Difference]: Start difference. First operand has 271 places, 609 transitions, 12747 flow. Second operand 37 states and 2081 transitions. [2023-08-24 16:06:54,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 775 transitions, 16838 flow [2023-08-24 16:06:55,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 775 transitions, 16113 flow, removed 308 selfloop flow, removed 8 redundant places. [2023-08-24 16:06:55,082 INFO L231 Difference]: Finished difference. Result has 302 places, 685 transitions, 15045 flow [2023-08-24 16:06:55,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=12230, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=15045, PETRI_PLACES=302, PETRI_TRANSITIONS=685} [2023-08-24 16:06:55,082 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 282 predicate places. [2023-08-24 16:06:55,082 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 685 transitions, 15045 flow [2023-08-24 16:06:55,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.05) internal successors, (1081), 20 states have internal predecessors, (1081), 0 states have call successors, (0), 0 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 16:06:55,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:55,083 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:55,089 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 16:06:55,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 16:06:55,289 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 16:06:55,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:55,289 INFO L85 PathProgramCache]: Analyzing trace with hash 110879228, now seen corresponding path program 16 times [2023-08-24 16:06:55,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:55,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073714964] [2023-08-24 16:06:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:55,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:55,377 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 16:06:55,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:55,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073714964] [2023-08-24 16:06:55,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073714964] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:55,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940480027] [2023-08-24 16:06:55,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:06:55,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:55,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:55,378 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 16:06:55,380 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 16:06:55,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:06:55,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:06:55,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 16:06:55,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:55,536 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 16:06:55,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:06:55,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940480027] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:55,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:55,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-24 16:06:55,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931577162] [2023-08-24 16:06:55,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:55,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 16:06:55,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 16:06:55,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-08-24 16:06:55,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:06:55,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 685 transitions, 15045 flow. Second operand has 20 states, 20 states have (on average 53.9) internal successors, (1078), 20 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:06:55,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:55,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:06:55,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:56,627 INFO L124 PetriNetUnfolderBase]: 1597/2776 cut-off events. [2023-08-24 16:06:56,628 INFO L125 PetriNetUnfolderBase]: For 60526/60526 co-relation queries the response was YES. [2023-08-24 16:06:56,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27532 conditions, 2776 events. 1597/2776 cut-off events. For 60526/60526 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 16515 event pairs, 27 based on Foata normal form. 46/2822 useless extension candidates. Maximal degree in co-relation 26625. Up to 987 conditions per place. [2023-08-24 16:06:56,679 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 279 selfloop transitions, 500 changer transitions 2/781 dead transitions. [2023-08-24 16:06:56,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 781 transitions, 17825 flow [2023-08-24 16:06:56,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 16:06:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 16:06:56,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1916 transitions. [2023-08-24 16:06:56,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083546462063086 [2023-08-24 16:06:56,684 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1916 transitions. [2023-08-24 16:06:56,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1916 transitions. [2023-08-24 16:06:56,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:56,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1916 transitions. [2023-08-24 16:06:56,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 56.35294117647059) internal successors, (1916), 34 states have internal predecessors, (1916), 0 states have call successors, (0), 0 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 16:06:56,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 138.0) internal successors, (4830), 35 states have internal predecessors, (4830), 0 states have call successors, (0), 0 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 16:06:56,690 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 138.0) internal successors, (4830), 35 states have internal predecessors, (4830), 0 states have call successors, (0), 0 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 16:06:56,690 INFO L175 Difference]: Start difference. First operand has 302 places, 685 transitions, 15045 flow. Second operand 34 states and 1916 transitions. [2023-08-24 16:06:56,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 781 transitions, 17825 flow [2023-08-24 16:06:57,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 781 transitions, 17234 flow, removed 162 selfloop flow, removed 21 redundant places. [2023-08-24 16:06:57,120 INFO L231 Difference]: Finished difference. Result has 315 places, 710 transitions, 16392 flow [2023-08-24 16:06:57,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=14331, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=16392, PETRI_PLACES=315, PETRI_TRANSITIONS=710} [2023-08-24 16:06:57,121 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 295 predicate places. [2023-08-24 16:06:57,121 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 710 transitions, 16392 flow [2023-08-24 16:06:57,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.9) internal successors, (1078), 20 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:06:57,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:57,121 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:57,126 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 16:06:57,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:57,325 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 16:06:57,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:57,325 INFO L85 PathProgramCache]: Analyzing trace with hash 255936920, now seen corresponding path program 17 times [2023-08-24 16:06:57,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:57,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365269912] [2023-08-24 16:06:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:57,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:57,489 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 16:06:57,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:57,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365269912] [2023-08-24 16:06:57,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365269912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:57,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218215434] [2023-08-24 16:06:57,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:06:57,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:57,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:57,492 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 16:06:57,512 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 16:06:57,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 16:06:57,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:06:57,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:06:57,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:06:57,652 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 16:06:57,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:06:57,788 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 16:06:57,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218215434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:06:57,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:06:57,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 16:06:57,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690064307] [2023-08-24 16:06:57,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:06:57,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 16:06:57,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:06:57,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 16:06:57,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-08-24 16:06:57,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:06:57,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 710 transitions, 16392 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 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 16:06:57,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:06:57,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:06:57,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:06:59,119 INFO L124 PetriNetUnfolderBase]: 1872/3263 cut-off events. [2023-08-24 16:06:59,119 INFO L125 PetriNetUnfolderBase]: For 66348/66348 co-relation queries the response was YES. [2023-08-24 16:06:59,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33149 conditions, 3263 events. 1872/3263 cut-off events. For 66348/66348 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 20127 event pairs, 29 based on Foata normal form. 12/3275 useless extension candidates. Maximal degree in co-relation 32915. Up to 1031 conditions per place. [2023-08-24 16:06:59,150 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 280 selfloop transitions, 621 changer transitions 0/901 dead transitions. [2023-08-24 16:06:59,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 901 transitions, 21440 flow [2023-08-24 16:06:59,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 16:06:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 16:06:59,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2083 transitions. [2023-08-24 16:06:59,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40795142969056014 [2023-08-24 16:06:59,152 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2083 transitions. [2023-08-24 16:06:59,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2083 transitions. [2023-08-24 16:06:59,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:06:59,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2083 transitions. [2023-08-24 16:06:59,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 56.2972972972973) internal successors, (2083), 37 states have internal predecessors, (2083), 0 states have call successors, (0), 0 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 16:06:59,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 138.0) internal successors, (5244), 38 states have internal predecessors, (5244), 0 states have call successors, (0), 0 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 16:06:59,158 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 138.0) internal successors, (5244), 38 states have internal predecessors, (5244), 0 states have call successors, (0), 0 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 16:06:59,159 INFO L175 Difference]: Start difference. First operand has 315 places, 710 transitions, 16392 flow. Second operand 37 states and 2083 transitions. [2023-08-24 16:06:59,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 901 transitions, 21440 flow [2023-08-24 16:06:59,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 901 transitions, 20838 flow, removed 79 selfloop flow, removed 23 redundant places. [2023-08-24 16:06:59,665 INFO L231 Difference]: Finished difference. Result has 334 places, 826 transitions, 20347 flow [2023-08-24 16:06:59,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=15912, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=514, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=20347, PETRI_PLACES=334, PETRI_TRANSITIONS=826} [2023-08-24 16:06:59,665 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 314 predicate places. [2023-08-24 16:06:59,665 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 826 transitions, 20347 flow [2023-08-24 16:06:59,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 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 16:06:59,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:06:59,666 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:06:59,672 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 16:06:59,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:59,870 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 16:06:59,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:06:59,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1391443388, now seen corresponding path program 18 times [2023-08-24 16:06:59,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:06:59,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2991219] [2023-08-24 16:06:59,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:06:59,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:06:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:06:59,984 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 16:06:59,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:06:59,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2991219] [2023-08-24 16:06:59,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2991219] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:06:59,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301090439] [2023-08-24 16:06:59,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:06:59,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:06:59,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:06:59,985 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 16:07:00,009 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 16:07:00,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 16:07:00,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:07:00,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:07:00,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:07:00,153 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 16:07:00,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:07:00,295 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 16:07:00,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301090439] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:07:00,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:07:00,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 16:07:00,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245552136] [2023-08-24 16:07:00,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:07:00,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 16:07:00,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:07:00,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 16:07:00,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2023-08-24 16:07:00,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:07:00,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 826 transitions, 20347 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 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 16:07:00,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:07:00,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:07:00,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:07:01,671 INFO L124 PetriNetUnfolderBase]: 2236/3893 cut-off events. [2023-08-24 16:07:01,671 INFO L125 PetriNetUnfolderBase]: For 86375/86375 co-relation queries the response was YES. [2023-08-24 16:07:01,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41775 conditions, 3893 events. 2236/3893 cut-off events. For 86375/86375 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 24876 event pairs, 17 based on Foata normal form. 36/3929 useless extension candidates. Maximal degree in co-relation 41533. Up to 1088 conditions per place. [2023-08-24 16:07:01,709 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 214 selfloop transitions, 838 changer transitions 12/1064 dead transitions. [2023-08-24 16:07:01,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1064 transitions, 27418 flow [2023-08-24 16:07:01,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 16:07:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 16:07:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2025 transitions. [2023-08-24 16:07:01,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076086956521739 [2023-08-24 16:07:01,712 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2025 transitions. [2023-08-24 16:07:01,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2025 transitions. [2023-08-24 16:07:01,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:07:01,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2025 transitions. [2023-08-24 16:07:01,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 56.25) internal successors, (2025), 36 states have internal predecessors, (2025), 0 states have call successors, (0), 0 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 16:07:01,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 138.0) internal successors, (5106), 37 states have internal predecessors, (5106), 0 states have call successors, (0), 0 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 16:07:01,717 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 138.0) internal successors, (5106), 37 states have internal predecessors, (5106), 0 states have call successors, (0), 0 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 16:07:01,717 INFO L175 Difference]: Start difference. First operand has 334 places, 826 transitions, 20347 flow. Second operand 36 states and 2025 transitions. [2023-08-24 16:07:01,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1064 transitions, 27418 flow [2023-08-24 16:07:02,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1064 transitions, 27035 flow, removed 131 selfloop flow, removed 11 redundant places. [2023-08-24 16:07:02,421 INFO L231 Difference]: Finished difference. Result has 369 places, 988 transitions, 26686 flow [2023-08-24 16:07:02,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=20022, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=680, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=26686, PETRI_PLACES=369, PETRI_TRANSITIONS=988} [2023-08-24 16:07:02,422 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 349 predicate places. [2023-08-24 16:07:02,422 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 988 transitions, 26686 flow [2023-08-24 16:07:02,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 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 16:07:02,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:07:02,423 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:07:02,427 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 16:07:02,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:07:02,627 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 16:07:02,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:07:02,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2134486084, now seen corresponding path program 19 times [2023-08-24 16:07:02,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:07:02,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456270806] [2023-08-24 16:07:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:07:02,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:07:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:07:02,734 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 16:07:02,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:07:02,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456270806] [2023-08-24 16:07:02,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456270806] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:07:02,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080181904] [2023-08-24 16:07:02,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:07:02,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:07:02,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:07:02,735 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 16:07:02,737 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 16:07:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:07:02,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:07:02,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:07:02,892 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 16:07:02,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:07:03,024 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 16:07:03,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080181904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:07:03,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:07:03,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 16:07:03,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083048676] [2023-08-24 16:07:03,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:07:03,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 16:07:03,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:07:03,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 16:07:03,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-08-24 16:07:03,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:07:03,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 988 transitions, 26686 flow. Second operand has 24 states, 24 states have (on average 53.958333333333336) internal successors, (1295), 24 states have internal predecessors, (1295), 0 states have call successors, (0), 0 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 16:07:03,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:07:03,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:07:03,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:07:05,136 INFO L124 PetriNetUnfolderBase]: 3057/5328 cut-off events. [2023-08-24 16:07:05,136 INFO L125 PetriNetUnfolderBase]: For 145748/145748 co-relation queries the response was YES. [2023-08-24 16:07:05,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61867 conditions, 5328 events. 3057/5328 cut-off events. For 145748/145748 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 36120 event pairs, 37 based on Foata normal form. 68/5396 useless extension candidates. Maximal degree in co-relation 61611. Up to 1390 conditions per place. [2023-08-24 16:07:05,203 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 483 selfloop transitions, 943 changer transitions 20/1446 dead transitions. [2023-08-24 16:07:05,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 1446 transitions, 40652 flow [2023-08-24 16:07:05,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-24 16:07:05,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-24 16:07:05,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2420 transitions. [2023-08-24 16:07:05,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40781934614088305 [2023-08-24 16:07:05,214 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2420 transitions. [2023-08-24 16:07:05,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2420 transitions. [2023-08-24 16:07:05,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:07:05,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2420 transitions. [2023-08-24 16:07:05,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 56.27906976744186) internal successors, (2420), 43 states have internal predecessors, (2420), 0 states have call successors, (0), 0 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 16:07:05,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 138.0) internal successors, (6072), 44 states have internal predecessors, (6072), 0 states have call successors, (0), 0 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 16:07:05,247 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 138.0) internal successors, (6072), 44 states have internal predecessors, (6072), 0 states have call successors, (0), 0 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 16:07:05,248 INFO L175 Difference]: Start difference. First operand has 369 places, 988 transitions, 26686 flow. Second operand 43 states and 2420 transitions. [2023-08-24 16:07:05,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 1446 transitions, 40652 flow [2023-08-24 16:07:06,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 1446 transitions, 39959 flow, removed 242 selfloop flow, removed 14 redundant places. [2023-08-24 16:07:06,864 INFO L231 Difference]: Finished difference. Result has 409 places, 1348 transitions, 39341 flow [2023-08-24 16:07:06,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=26070, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=39341, PETRI_PLACES=409, PETRI_TRANSITIONS=1348} [2023-08-24 16:07:06,865 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 389 predicate places. [2023-08-24 16:07:06,865 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 1348 transitions, 39341 flow [2023-08-24 16:07:06,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.958333333333336) internal successors, (1295), 24 states have internal predecessors, (1295), 0 states have call successors, (0), 0 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 16:07:06,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:07:06,865 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:07:06,872 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 16:07:07,069 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,SelfDestructingSolverStorable21 [2023-08-24 16:07:07,070 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 16:07:07,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:07:07,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2056386340, now seen corresponding path program 20 times [2023-08-24 16:07:07,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:07:07,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257575795] [2023-08-24 16:07:07,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:07:07,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:07:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:07:07,191 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 16:07:07,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:07:07,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257575795] [2023-08-24 16:07:07,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257575795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:07:07,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126336486] [2023-08-24 16:07:07,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:07:07,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:07:07,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:07:07,192 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 16:07:07,194 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 16:07:07,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:07:07,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:07:07,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:07:07,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:07:07,347 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 16:07:07,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:07:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:07:07,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126336486] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:07:07,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:07:07,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-08-24 16:07:07,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989463495] [2023-08-24 16:07:07,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:07:07,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 16:07:07,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:07:07,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 16:07:07,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2023-08-24 16:07:07,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:07:07,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 1348 transitions, 39341 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 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 16:07:07,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:07:07,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:07:07,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:07:09,809 INFO L124 PetriNetUnfolderBase]: 3133/5482 cut-off events. [2023-08-24 16:07:09,810 INFO L125 PetriNetUnfolderBase]: For 173272/173272 co-relation queries the response was YES. [2023-08-24 16:07:09,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67502 conditions, 5482 events. 3133/5482 cut-off events. For 173272/173272 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 37545 event pairs, 121 based on Foata normal form. 58/5540 useless extension candidates. Maximal degree in co-relation 67223. Up to 4808 conditions per place. [2023-08-24 16:07:09,884 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 1277 selfloop transitions, 174 changer transitions 18/1469 dead transitions. [2023-08-24 16:07:09,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1469 transitions, 44481 flow [2023-08-24 16:07:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 16:07:09,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 16:07:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1641 transitions. [2023-08-24 16:07:09,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41004497751124436 [2023-08-24 16:07:09,886 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1641 transitions. [2023-08-24 16:07:09,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1641 transitions. [2023-08-24 16:07:09,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:07:09,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1641 transitions. [2023-08-24 16:07:09,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 56.58620689655172) internal successors, (1641), 29 states have internal predecessors, (1641), 0 states have call successors, (0), 0 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 16:07:09,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 138.0) internal successors, (4140), 30 states have internal predecessors, (4140), 0 states have call successors, (0), 0 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 16:07:09,891 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 138.0) internal successors, (4140), 30 states have internal predecessors, (4140), 0 states have call successors, (0), 0 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 16:07:09,891 INFO L175 Difference]: Start difference. First operand has 409 places, 1348 transitions, 39341 flow. Second operand 29 states and 1641 transitions. [2023-08-24 16:07:09,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1469 transitions, 44481 flow [2023-08-24 16:07:11,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 1469 transitions, 43819 flow, removed 250 selfloop flow, removed 17 redundant places. [2023-08-24 16:07:11,971 INFO L231 Difference]: Finished difference. Result has 430 places, 1390 transitions, 40544 flow [2023-08-24 16:07:11,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=38542, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=40544, PETRI_PLACES=430, PETRI_TRANSITIONS=1390} [2023-08-24 16:07:11,972 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 410 predicate places. [2023-08-24 16:07:11,972 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 1390 transitions, 40544 flow [2023-08-24 16:07:11,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 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 16:07:11,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:07:11,973 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:07:11,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-24 16:07:12,177 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,SelfDestructingSolverStorable22 [2023-08-24 16:07:12,178 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 16:07:12,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:07:12,178 INFO L85 PathProgramCache]: Analyzing trace with hash -2112030052, now seen corresponding path program 21 times [2023-08-24 16:07:12,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:07:12,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918541864] [2023-08-24 16:07:12,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:07:12,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:07:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:07:12,265 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 16:07:12,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:07:12,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918541864] [2023-08-24 16:07:12,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918541864] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:07:12,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227630980] [2023-08-24 16:07:12,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:07:12,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:07:12,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:07:12,267 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 16:07:12,269 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 16:07:12,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 16:07:12,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:07:12,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 16:07:12,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:07:12,406 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 16:07:12,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:07:12,512 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 16:07:12,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227630980] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:07:12,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:07:12,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-08-24 16:07:12,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371320429] [2023-08-24 16:07:12,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:07:12,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 16:07:12,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:07:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 16:07:12,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-08-24 16:07:12,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:07:12,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1390 transitions, 40544 flow. Second operand has 22 states, 22 states have (on average 53.90909090909091) internal successors, (1186), 22 states have internal predecessors, (1186), 0 states have call successors, (0), 0 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 16:07:12,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:07:12,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:07:12,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:07:14,730 INFO L124 PetriNetUnfolderBase]: 3204/5553 cut-off events. [2023-08-24 16:07:14,730 INFO L125 PetriNetUnfolderBase]: For 169415/169415 co-relation queries the response was YES. [2023-08-24 16:07:14,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68516 conditions, 5553 events. 3204/5553 cut-off events. For 169415/169415 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 37751 event pairs, 123 based on Foata normal form. 28/5581 useless extension candidates. Maximal degree in co-relation 68227. Up to 5003 conditions per place. [2023-08-24 16:07:14,804 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 1270 selfloop transitions, 199 changer transitions 4/1473 dead transitions. [2023-08-24 16:07:14,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1473 transitions, 45245 flow [2023-08-24 16:07:14,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 16:07:14,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 16:07:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1347 transitions. [2023-08-24 16:07:14,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067028985507246 [2023-08-24 16:07:14,806 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1347 transitions. [2023-08-24 16:07:14,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1347 transitions. [2023-08-24 16:07:14,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:07:14,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1347 transitions. [2023-08-24 16:07:14,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 56.125) internal successors, (1347), 24 states have internal predecessors, (1347), 0 states have call successors, (0), 0 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 16:07:14,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 138.0) internal successors, (3450), 25 states have internal predecessors, (3450), 0 states have call successors, (0), 0 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 16:07:14,809 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 138.0) internal successors, (3450), 25 states have internal predecessors, (3450), 0 states have call successors, (0), 0 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 16:07:14,809 INFO L175 Difference]: Start difference. First operand has 430 places, 1390 transitions, 40544 flow. Second operand 24 states and 1347 transitions. [2023-08-24 16:07:14,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1473 transitions, 45245 flow [2023-08-24 16:07:17,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1473 transitions, 44598 flow, removed 132 selfloop flow, removed 19 redundant places. [2023-08-24 16:07:17,157 INFO L231 Difference]: Finished difference. Result has 441 places, 1436 transitions, 41897 flow [2023-08-24 16:07:17,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=39692, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=41897, PETRI_PLACES=441, PETRI_TRANSITIONS=1436} [2023-08-24 16:07:17,158 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 421 predicate places. [2023-08-24 16:07:17,158 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 1436 transitions, 41897 flow [2023-08-24 16:07:17,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.90909090909091) internal successors, (1186), 22 states have internal predecessors, (1186), 0 states have call successors, (0), 0 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 16:07:17,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:07:17,159 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:07:17,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-24 16:07:17,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:07:17,363 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 16:07:17,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:07:17,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1701325342, now seen corresponding path program 22 times [2023-08-24 16:07:17,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:07:17,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725622960] [2023-08-24 16:07:17,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:07:17,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:07:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:07:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:07:17,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:07:17,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725622960] [2023-08-24 16:07:17,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725622960] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:07:17,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189031989] [2023-08-24 16:07:17,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:07:17,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:07:17,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:07:17,446 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 16:07:17,448 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 16:07:17,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:07:17,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:07:17,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 16:07:17,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:07:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:07:17,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:07:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:07:17,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189031989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:07:17,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:07:17,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 10 [2023-08-24 16:07:17,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129972399] [2023-08-24 16:07:17,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:07:17,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 16:07:17,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:07:17,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 16:07:17,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-08-24 16:07:17,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 138 [2023-08-24 16:07:17,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 1436 transitions, 41897 flow. Second operand has 12 states, 12 states have (on average 59.0) internal successors, (708), 12 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 16:07:17,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:07:17,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 138 [2023-08-24 16:07:17,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:07:20,750 INFO L124 PetriNetUnfolderBase]: 4340/7493 cut-off events. [2023-08-24 16:07:20,751 INFO L125 PetriNetUnfolderBase]: For 215363/215363 co-relation queries the response was YES. [2023-08-24 16:07:20,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92868 conditions, 7493 events. 4340/7493 cut-off events. For 215363/215363 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 53471 event pairs, 128 based on Foata normal form. 1/7493 useless extension candidates. Maximal degree in co-relation 92481. Up to 4210 conditions per place. [2023-08-24 16:07:20,942 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 1303 selfloop transitions, 610 changer transitions 100/2016 dead transitions. [2023-08-24 16:07:20,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 2016 transitions, 62115 flow [2023-08-24 16:07:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 16:07:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 16:07:20,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 457 transitions. [2023-08-24 16:07:20,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4730848861283644 [2023-08-24 16:07:20,944 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 457 transitions. [2023-08-24 16:07:20,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 457 transitions. [2023-08-24 16:07:20,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:07:20,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 457 transitions. [2023-08-24 16:07:20,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.28571428571429) internal successors, (457), 7 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:07:20,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 138.0) internal successors, (1104), 8 states have internal predecessors, (1104), 0 states have call successors, (0), 0 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 16:07:20,947 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 138.0) internal successors, (1104), 8 states have internal predecessors, (1104), 0 states have call successors, (0), 0 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 16:07:20,947 INFO L175 Difference]: Start difference. First operand has 441 places, 1436 transitions, 41897 flow. Second operand 7 states and 457 transitions. [2023-08-24 16:07:20,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 2016 transitions, 62115 flow [2023-08-24 16:07:24,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 2016 transitions, 61557 flow, removed 216 selfloop flow, removed 11 redundant places. [2023-08-24 16:07:24,390 INFO L231 Difference]: Finished difference. Result has 439 places, 1725 transitions, 52346 flow [2023-08-24 16:07:24,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=41537, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=826, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=52346, PETRI_PLACES=439, PETRI_TRANSITIONS=1725} [2023-08-24 16:07:24,391 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 419 predicate places. [2023-08-24 16:07:24,391 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 1725 transitions, 52346 flow [2023-08-24 16:07:24,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 59.0) internal successors, (708), 12 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 16:07:24,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:07:24,392 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:07:24,397 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 16:07:24,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:07:24,597 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 16:07:24,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:07:24,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2001906576, now seen corresponding path program 23 times [2023-08-24 16:07:24,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:07:24,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007763111] [2023-08-24 16:07:24,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:07:24,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:07:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:07:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:07:24,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:07:24,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007763111] [2023-08-24 16:07:24,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007763111] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:07:24,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368269896] [2023-08-24 16:07:24,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:07:24,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:07:24,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:07:24,724 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 16:07:24,726 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 16:07:24,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 16:07:24,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:07:24,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 16:07:24,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:07:24,816 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 16:07:24,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:07:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:07:24,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368269896] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:07:24,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:07:24,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2023-08-24 16:07:24,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962262274] [2023-08-24 16:07:24,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:07:24,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 16:07:24,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:07:24,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 16:07:24,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-08-24 16:07:24,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:07:24,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 1725 transitions, 52346 flow. Second operand has 16 states, 16 states have (on average 54.625) internal successors, (874), 16 states have internal predecessors, (874), 0 states have call successors, (0), 0 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 16:07:24,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:07:24,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:07:24,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:07:28,538 INFO L124 PetriNetUnfolderBase]: 4359/7605 cut-off events. [2023-08-24 16:07:28,538 INFO L125 PetriNetUnfolderBase]: For 254649/254649 co-relation queries the response was YES. [2023-08-24 16:07:28,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99048 conditions, 7605 events. 4359/7605 cut-off events. For 254649/254649 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 55099 event pairs, 175 based on Foata normal form. 58/7663 useless extension candidates. Maximal degree in co-relation 98635. Up to 5980 conditions per place. [2023-08-24 16:07:28,643 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 1473 selfloop transitions, 417 changer transitions 21/1911 dead transitions. [2023-08-24 16:07:28,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 1911 transitions, 60435 flow [2023-08-24 16:07:28,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 16:07:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 16:07:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1501 transitions. [2023-08-24 16:07:28,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41833890746934227 [2023-08-24 16:07:28,645 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1501 transitions. [2023-08-24 16:07:28,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1501 transitions. [2023-08-24 16:07:28,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:07:28,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1501 transitions. [2023-08-24 16:07:28,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 57.73076923076923) internal successors, (1501), 26 states have internal predecessors, (1501), 0 states have call successors, (0), 0 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 16:07:28,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 138.0) internal successors, (3726), 27 states have internal predecessors, (3726), 0 states have call successors, (0), 0 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 16:07:28,649 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 138.0) internal successors, (3726), 27 states have internal predecessors, (3726), 0 states have call successors, (0), 0 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 16:07:28,649 INFO L175 Difference]: Start difference. First operand has 439 places, 1725 transitions, 52346 flow. Second operand 26 states and 1501 transitions. [2023-08-24 16:07:28,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 1911 transitions, 60435 flow [2023-08-24 16:07:32,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 1911 transitions, 60017 flow, removed 126 selfloop flow, removed 3 redundant places. [2023-08-24 16:07:32,149 INFO L231 Difference]: Finished difference. Result has 471 places, 1802 transitions, 55787 flow [2023-08-24 16:07:32,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=51969, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=55787, PETRI_PLACES=471, PETRI_TRANSITIONS=1802} [2023-08-24 16:07:32,150 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 451 predicate places. [2023-08-24 16:07:32,150 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 1802 transitions, 55787 flow [2023-08-24 16:07:32,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.625) internal successors, (874), 16 states have internal predecessors, (874), 0 states have call successors, (0), 0 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 16:07:32,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:07:32,150 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:07:32,155 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 16:07:32,355 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,SelfDestructingSolverStorable25 [2023-08-24 16:07:32,355 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 16:07:32,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:07:32,355 INFO L85 PathProgramCache]: Analyzing trace with hash -953666512, now seen corresponding path program 24 times [2023-08-24 16:07:32,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:07:32,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666483898] [2023-08-24 16:07:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:07:32,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:07:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:07:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:07:32,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:07:32,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666483898] [2023-08-24 16:07:32,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666483898] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:07:32,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395210302] [2023-08-24 16:07:32,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:07:32,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:07:32,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:07:32,466 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 16:07:32,468 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 16:07:32,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 16:07:32,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:07:32,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 16:07:32,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:07:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:07:32,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:07:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:07:32,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395210302] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:07:32,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:07:32,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-08-24 16:07:32,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941997598] [2023-08-24 16:07:32,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:07:32,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 16:07:32,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:07:32,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 16:07:32,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-08-24 16:07:32,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:07:32,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1802 transitions, 55787 flow. Second operand has 24 states, 24 states have (on average 53.708333333333336) internal successors, (1289), 24 states have internal predecessors, (1289), 0 states have call successors, (0), 0 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 16:07:32,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:07:32,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:07:32,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:07:37,853 INFO L124 PetriNetUnfolderBase]: 4802/8414 cut-off events. [2023-08-24 16:07:37,853 INFO L125 PetriNetUnfolderBase]: For 341731/341731 co-relation queries the response was YES. [2023-08-24 16:07:37,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111146 conditions, 8414 events. 4802/8414 cut-off events. For 341731/341731 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 61930 event pairs, 28 based on Foata normal form. 154/8568 useless extension candidates. Maximal degree in co-relation 110957. Up to 2258 conditions per place. [2023-08-24 16:07:37,971 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 438 selfloop transitions, 1655 changer transitions 44/2137 dead transitions. [2023-08-24 16:07:37,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 2137 transitions, 68936 flow [2023-08-24 16:07:37,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-24 16:07:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-24 16:07:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2759 transitions. [2023-08-24 16:07:37,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080153800650695 [2023-08-24 16:07:37,974 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2759 transitions. [2023-08-24 16:07:37,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2759 transitions. [2023-08-24 16:07:37,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:07:37,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2759 transitions. [2023-08-24 16:07:37,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 56.30612244897959) internal successors, (2759), 49 states have internal predecessors, (2759), 0 states have call successors, (0), 0 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 16:07:37,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 138.0) internal successors, (6900), 50 states have internal predecessors, (6900), 0 states have call successors, (0), 0 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 16:07:37,980 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 138.0) internal successors, (6900), 50 states have internal predecessors, (6900), 0 states have call successors, (0), 0 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 16:07:37,980 INFO L175 Difference]: Start difference. First operand has 471 places, 1802 transitions, 55787 flow. Second operand 49 states and 2759 transitions. [2023-08-24 16:07:37,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 2137 transitions, 68936 flow [2023-08-24 16:07:41,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 2137 transitions, 67268 flow, removed 277 selfloop flow, removed 9 redundant places. [2023-08-24 16:07:41,867 INFO L231 Difference]: Finished difference. Result has 519 places, 1994 transitions, 65907 flow [2023-08-24 16:07:41,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=54331, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=65907, PETRI_PLACES=519, PETRI_TRANSITIONS=1994} [2023-08-24 16:07:41,868 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 499 predicate places. [2023-08-24 16:07:41,868 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 1994 transitions, 65907 flow [2023-08-24 16:07:41,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.708333333333336) internal successors, (1289), 24 states have internal predecessors, (1289), 0 states have call successors, (0), 0 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 16:07:41,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:07:41,868 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:07:41,877 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 16:07:42,073 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,SelfDestructingSolverStorable26 [2023-08-24 16:07:42,073 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 16:07:42,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:07:42,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2059207202, now seen corresponding path program 25 times [2023-08-24 16:07:42,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:07:42,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724696444] [2023-08-24 16:07:42,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:07:42,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:07:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:07:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:07:42,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:07:42,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724696444] [2023-08-24 16:07:42,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724696444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:07:42,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397491642] [2023-08-24 16:07:42,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:07:42,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:07:42,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:07:42,184 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 16:07:42,186 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 16:07:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:07:42,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 16:07:42,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:07:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:07:42,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:07:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:07:42,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397491642] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:07:42,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:07:42,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-08-24 16:07:42,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913955739] [2023-08-24 16:07:42,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:07:42,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 16:07:42,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:07:42,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 16:07:42,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-08-24 16:07:42,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:07:42,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1994 transitions, 65907 flow. Second operand has 24 states, 24 states have (on average 53.708333333333336) internal successors, (1289), 24 states have internal predecessors, (1289), 0 states have call successors, (0), 0 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 16:07:42,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:07:42,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:07:42,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:07:47,996 INFO L124 PetriNetUnfolderBase]: 5209/9146 cut-off events. [2023-08-24 16:07:47,996 INFO L125 PetriNetUnfolderBase]: For 401972/401972 co-relation queries the response was YES. [2023-08-24 16:07:48,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127298 conditions, 9146 events. 5209/9146 cut-off events. For 401972/401972 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 68250 event pairs, 165 based on Foata normal form. 160/9306 useless extension candidates. Maximal degree in co-relation 126910. Up to 7509 conditions per place. [2023-08-24 16:07:48,132 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 1789 selfloop transitions, 452 changer transitions 21/2262 dead transitions. [2023-08-24 16:07:48,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 2262 transitions, 78241 flow [2023-08-24 16:07:48,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 16:07:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 16:07:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1532 transitions. [2023-08-24 16:07:48,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111647879763822 [2023-08-24 16:07:48,134 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1532 transitions. [2023-08-24 16:07:48,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1532 transitions. [2023-08-24 16:07:48,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:07:48,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1532 transitions. [2023-08-24 16:07:48,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 56.74074074074074) internal successors, (1532), 27 states have internal predecessors, (1532), 0 states have call successors, (0), 0 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 16:07:48,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 138.0) internal successors, (3864), 28 states have internal predecessors, (3864), 0 states have call successors, (0), 0 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 16:07:48,138 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 138.0) internal successors, (3864), 28 states have internal predecessors, (3864), 0 states have call successors, (0), 0 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 16:07:48,138 INFO L175 Difference]: Start difference. First operand has 519 places, 1994 transitions, 65907 flow. Second operand 27 states and 1532 transitions. [2023-08-24 16:07:48,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 2262 transitions, 78241 flow [2023-08-24 16:07:54,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 2262 transitions, 75573 flow, removed 868 selfloop flow, removed 23 redundant places. [2023-08-24 16:07:54,768 INFO L231 Difference]: Finished difference. Result has 534 places, 2182 transitions, 71493 flow [2023-08-24 16:07:54,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=63173, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1986, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=71493, PETRI_PLACES=534, PETRI_TRANSITIONS=2182} [2023-08-24 16:07:54,774 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 514 predicate places. [2023-08-24 16:07:54,774 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 2182 transitions, 71493 flow [2023-08-24 16:07:54,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.708333333333336) internal successors, (1289), 24 states have internal predecessors, (1289), 0 states have call successors, (0), 0 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 16:07:54,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:07:54,775 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:07:54,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-24 16:07:54,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 16:07:54,979 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 16:07:54,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:07:54,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1398298695, now seen corresponding path program 26 times [2023-08-24 16:07:54,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:07:54,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424159850] [2023-08-24 16:07:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:07:54,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:07:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:07:55,117 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 16:07:55,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:07:55,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424159850] [2023-08-24 16:07:55,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424159850] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:07:55,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716974283] [2023-08-24 16:07:55,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:07:55,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:07:55,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:07:55,119 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 16:07:55,120 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 16:07:55,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:07:55,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:07:55,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 16:07:55,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:07:55,272 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 16:07:55,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:07:55,539 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 16:07:55,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716974283] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:07:55,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:07:55,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-08-24 16:07:55,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117803829] [2023-08-24 16:07:55,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:07:55,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 16:07:55,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:07:55,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 16:07:55,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2023-08-24 16:07:55,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:07:55,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 2182 transitions, 71493 flow. Second operand has 26 states, 26 states have (on average 53.96153846153846) internal successors, (1403), 26 states have internal predecessors, (1403), 0 states have call successors, (0), 0 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 16:07:55,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:07:55,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:07:55,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:08:02,755 INFO L124 PetriNetUnfolderBase]: 6310/11099 cut-off events. [2023-08-24 16:08:02,755 INFO L125 PetriNetUnfolderBase]: For 421872/421872 co-relation queries the response was YES. [2023-08-24 16:08:02,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152753 conditions, 11099 events. 6310/11099 cut-off events. For 421872/421872 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 85542 event pairs, 62 based on Foata normal form. 24/11123 useless extension candidates. Maximal degree in co-relation 151452. Up to 3810 conditions per place. [2023-08-24 16:08:03,068 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 520 selfloop transitions, 2492 changer transitions 50/3062 dead transitions. [2023-08-24 16:08:03,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 3062 transitions, 104514 flow [2023-08-24 16:08:03,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-24 16:08:03,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-24 16:08:03,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2602 transitions. [2023-08-24 16:08:03,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40989287964713295 [2023-08-24 16:08:03,071 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2602 transitions. [2023-08-24 16:08:03,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2602 transitions. [2023-08-24 16:08:03,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:08:03,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2602 transitions. [2023-08-24 16:08:03,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 56.56521739130435) internal successors, (2602), 46 states have internal predecessors, (2602), 0 states have call successors, (0), 0 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 16:08:03,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 138.0) internal successors, (6486), 47 states have internal predecessors, (6486), 0 states have call successors, (0), 0 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 16:08:03,078 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 138.0) internal successors, (6486), 47 states have internal predecessors, (6486), 0 states have call successors, (0), 0 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 16:08:03,078 INFO L175 Difference]: Start difference. First operand has 534 places, 2182 transitions, 71493 flow. Second operand 46 states and 2602 transitions. [2023-08-24 16:08:03,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 3062 transitions, 104514 flow [2023-08-24 16:08:10,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 3062 transitions, 103584 flow, removed 425 selfloop flow, removed 10 redundant places. [2023-08-24 16:08:10,802 INFO L231 Difference]: Finished difference. Result has 580 places, 2844 transitions, 101300 flow [2023-08-24 16:08:10,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=70647, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1831, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=101300, PETRI_PLACES=580, PETRI_TRANSITIONS=2844} [2023-08-24 16:08:10,804 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 560 predicate places. [2023-08-24 16:08:10,804 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 2844 transitions, 101300 flow [2023-08-24 16:08:10,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 53.96153846153846) internal successors, (1403), 26 states have internal predecessors, (1403), 0 states have call successors, (0), 0 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 16:08:10,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:08:10,805 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:08:10,809 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 16:08:11,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 16:08:11,009 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 16:08:11,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:08:11,010 INFO L85 PathProgramCache]: Analyzing trace with hash -18478395, now seen corresponding path program 27 times [2023-08-24 16:08:11,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:08:11,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825510856] [2023-08-24 16:08:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:08:11,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:08:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:08:11,148 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 16:08:11,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:08:11,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825510856] [2023-08-24 16:08:11,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825510856] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:08:11,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739929367] [2023-08-24 16:08:11,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:08:11,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:08:11,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:08:11,149 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 16:08:11,151 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 16:08:11,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 16:08:11,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:08:11,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 16:08:11,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:08:11,320 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 16:08:11,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:08:11,565 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 16:08:11,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739929367] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:08:11,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:08:11,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-24 16:08:11,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175739085] [2023-08-24 16:08:11,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:08:11,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 16:08:11,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:08:11,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 16:08:11,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2023-08-24 16:08:11,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:08:11,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 2844 transitions, 101300 flow. Second operand has 27 states, 27 states have (on average 53.96296296296296) internal successors, (1457), 27 states have internal predecessors, (1457), 0 states have call successors, (0), 0 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 16:08:11,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:08:11,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:08:11,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:08:20,481 INFO L124 PetriNetUnfolderBase]: 6839/11884 cut-off events. [2023-08-24 16:08:20,482 INFO L125 PetriNetUnfolderBase]: For 478529/478529 co-relation queries the response was YES. [2023-08-24 16:08:20,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174214 conditions, 11884 events. 6839/11884 cut-off events. For 478529/478529 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 90958 event pairs, 141 based on Foata normal form. 42/11926 useless extension candidates. Maximal degree in co-relation 173336. Up to 4544 conditions per place. [2023-08-24 16:08:20,754 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 658 selfloop transitions, 2582 changer transitions 3/3243 dead transitions. [2023-08-24 16:08:20,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 3243 transitions, 119466 flow [2023-08-24 16:08:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-24 16:08:20,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-24 16:08:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2650 transitions. [2023-08-24 16:08:20,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4085723095898859 [2023-08-24 16:08:20,756 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2650 transitions. [2023-08-24 16:08:20,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2650 transitions. [2023-08-24 16:08:20,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:08:20,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2650 transitions. [2023-08-24 16:08:20,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 56.38297872340426) internal successors, (2650), 47 states have internal predecessors, (2650), 0 states have call successors, (0), 0 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 16:08:20,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 138.0) internal successors, (6624), 48 states have internal predecessors, (6624), 0 states have call successors, (0), 0 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 16:08:20,762 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 138.0) internal successors, (6624), 48 states have internal predecessors, (6624), 0 states have call successors, (0), 0 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 16:08:20,762 INFO L175 Difference]: Start difference. First operand has 580 places, 2844 transitions, 101300 flow. Second operand 47 states and 2650 transitions. [2023-08-24 16:08:20,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 3243 transitions, 119466 flow [2023-08-24 16:08:31,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 3243 transitions, 117045 flow, removed 1127 selfloop flow, removed 13 redundant places. [2023-08-24 16:08:31,861 INFO L231 Difference]: Finished difference. Result has 625 places, 3115 transitions, 116306 flow [2023-08-24 16:08:31,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=99426, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=116306, PETRI_PLACES=625, PETRI_TRANSITIONS=3115} [2023-08-24 16:08:31,863 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 605 predicate places. [2023-08-24 16:08:31,863 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 3115 transitions, 116306 flow [2023-08-24 16:08:31,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 53.96296296296296) internal successors, (1457), 27 states have internal predecessors, (1457), 0 states have call successors, (0), 0 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 16:08:31,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:08:31,863 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:08:31,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-24 16:08:32,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:08:32,068 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 16:08:32,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:08:32,068 INFO L85 PathProgramCache]: Analyzing trace with hash 929866181, now seen corresponding path program 28 times [2023-08-24 16:08:32,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:08:32,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100423353] [2023-08-24 16:08:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:08:32,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:08:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:08:32,185 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 16:08:32,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:08:32,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100423353] [2023-08-24 16:08:32,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100423353] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:08:32,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591048367] [2023-08-24 16:08:32,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:08:32,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:08:32,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:08:32,186 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 16:08:32,188 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 16:08:32,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:08:32,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:08:32,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 16:08:32,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:08:32,413 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 16:08:32,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:08:32,515 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 16:08:32,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591048367] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:08:32,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:08:32,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-08-24 16:08:32,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100726277] [2023-08-24 16:08:32,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:08:32,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 16:08:32,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:08:32,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 16:08:32,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2023-08-24 16:08:32,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:08:32,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 3115 transitions, 116306 flow. Second operand has 25 states, 25 states have (on average 53.6) internal successors, (1340), 25 states have internal predecessors, (1340), 0 states have call successors, (0), 0 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 16:08:32,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:08:32,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:08:32,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:08:43,335 INFO L124 PetriNetUnfolderBase]: 7620/13035 cut-off events. [2023-08-24 16:08:43,335 INFO L125 PetriNetUnfolderBase]: For 545113/545113 co-relation queries the response was YES. [2023-08-24 16:08:43,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199694 conditions, 13035 events. 7620/13035 cut-off events. For 545113/545113 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 99097 event pairs, 237 based on Foata normal form. 52/13087 useless extension candidates. Maximal degree in co-relation 198766. Up to 6459 conditions per place. [2023-08-24 16:08:43,566 INFO L140 encePairwiseOnDemand]: 130/138 looper letters, 1350 selfloop transitions, 2311 changer transitions 6/3667 dead transitions. [2023-08-24 16:08:43,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 3667 transitions, 141387 flow [2023-08-24 16:08:43,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-08-24 16:08:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-08-24 16:08:43,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3683 transitions. [2023-08-24 16:08:43,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043697848045674 [2023-08-24 16:08:43,569 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3683 transitions. [2023-08-24 16:08:43,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3683 transitions. [2023-08-24 16:08:43,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:08:43,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3683 transitions. [2023-08-24 16:08:43,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 55.803030303030305) internal successors, (3683), 66 states have internal predecessors, (3683), 0 states have call successors, (0), 0 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 16:08:43,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 138.0) internal successors, (9246), 67 states have internal predecessors, (9246), 0 states have call successors, (0), 0 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 16:08:43,577 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 138.0) internal successors, (9246), 67 states have internal predecessors, (9246), 0 states have call successors, (0), 0 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 16:08:43,577 INFO L175 Difference]: Start difference. First operand has 625 places, 3115 transitions, 116306 flow. Second operand 66 states and 3683 transitions. [2023-08-24 16:08:43,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 690 places, 3667 transitions, 141387 flow [2023-08-24 16:08:58,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 677 places, 3667 transitions, 140537 flow, removed 338 selfloop flow, removed 13 redundant places. [2023-08-24 16:08:58,861 INFO L231 Difference]: Finished difference. Result has 693 places, 3513 transitions, 136886 flow [2023-08-24 16:08:58,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=115281, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1939, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1082, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=136886, PETRI_PLACES=693, PETRI_TRANSITIONS=3513} [2023-08-24 16:08:58,864 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 673 predicate places. [2023-08-24 16:08:58,864 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 3513 transitions, 136886 flow [2023-08-24 16:08:58,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.6) internal successors, (1340), 25 states have internal predecessors, (1340), 0 states have call successors, (0), 0 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 16:08:58,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:08:58,864 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:08:58,869 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 16:08:59,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:08:59,068 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 16:08:59,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:08:59,069 INFO L85 PathProgramCache]: Analyzing trace with hash -789072171, now seen corresponding path program 29 times [2023-08-24 16:08:59,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:08:59,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483885230] [2023-08-24 16:08:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:08:59,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:08:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:08:59,182 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 16:08:59,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:08:59,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483885230] [2023-08-24 16:08:59,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483885230] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:08:59,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126584259] [2023-08-24 16:08:59,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:08:59,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:08:59,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:08:59,183 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 16:08:59,184 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 16:08:59,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 16:08:59,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:08:59,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 16:08:59,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:08:59,430 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 16:08:59,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:08:59,539 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 16:08:59,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126584259] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:08:59,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:08:59,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-08-24 16:08:59,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320241053] [2023-08-24 16:08:59,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:08:59,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 16:08:59,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:08:59,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 16:08:59,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2023-08-24 16:08:59,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:08:59,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 3513 transitions, 136886 flow. Second operand has 25 states, 25 states have (on average 53.6) internal successors, (1340), 25 states have internal predecessors, (1340), 0 states have call successors, (0), 0 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 16:08:59,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:08:59,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:08:59,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:09:12,814 INFO L124 PetriNetUnfolderBase]: 7794/13487 cut-off events. [2023-08-24 16:09:12,814 INFO L125 PetriNetUnfolderBase]: For 611694/611694 co-relation queries the response was YES. [2023-08-24 16:09:13,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209042 conditions, 13487 events. 7794/13487 cut-off events. For 611694/611694 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 105080 event pairs, 79 based on Foata normal form. 72/13559 useless extension candidates. Maximal degree in co-relation 208827. Up to 4746 conditions per place. [2023-08-24 16:09:13,167 INFO L140 encePairwiseOnDemand]: 130/138 looper letters, 1022 selfloop transitions, 2700 changer transitions 3/3725 dead transitions. [2023-08-24 16:09:13,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 754 places, 3725 transitions, 147934 flow [2023-08-24 16:09:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-24 16:09:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-24 16:09:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3807 transitions. [2023-08-24 16:09:13,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40569053708439895 [2023-08-24 16:09:13,170 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3807 transitions. [2023-08-24 16:09:13,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3807 transitions. [2023-08-24 16:09:13,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:09:13,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3807 transitions. [2023-08-24 16:09:13,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 55.98529411764706) internal successors, (3807), 68 states have internal predecessors, (3807), 0 states have call successors, (0), 0 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 16:09:13,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 138.0) internal successors, (9522), 69 states have internal predecessors, (9522), 0 states have call successors, (0), 0 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 16:09:13,178 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 138.0) internal successors, (9522), 69 states have internal predecessors, (9522), 0 states have call successors, (0), 0 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 16:09:13,178 INFO L175 Difference]: Start difference. First operand has 693 places, 3513 transitions, 136886 flow. Second operand 68 states and 3807 transitions. [2023-08-24 16:09:13,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 754 places, 3725 transitions, 147934 flow [2023-08-24 16:09:29,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 724 places, 3725 transitions, 144549 flow, removed 664 selfloop flow, removed 30 redundant places. [2023-08-24 16:09:29,601 INFO L231 Difference]: Finished difference. Result has 726 places, 3566 transitions, 141148 flow [2023-08-24 16:09:29,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=132645, PETRI_DIFFERENCE_MINUEND_PLACES=657, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2629, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=141148, PETRI_PLACES=726, PETRI_TRANSITIONS=3566} [2023-08-24 16:09:29,603 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 706 predicate places. [2023-08-24 16:09:29,603 INFO L495 AbstractCegarLoop]: Abstraction has has 726 places, 3566 transitions, 141148 flow [2023-08-24 16:09:29,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.6) internal successors, (1340), 25 states have internal predecessors, (1340), 0 states have call successors, (0), 0 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 16:09:29,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:09:29,604 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:09:29,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-24 16:09:29,808 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,SelfDestructingSolverStorable31 [2023-08-24 16:09:29,808 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 16:09:29,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:09:29,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1602183593, now seen corresponding path program 30 times [2023-08-24 16:09:29,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:09:29,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031222887] [2023-08-24 16:09:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:09:29,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:09:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:09:29,939 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 16:09:29,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:09:29,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031222887] [2023-08-24 16:09:29,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031222887] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:09:29,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575919180] [2023-08-24 16:09:29,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:09:29,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:09:29,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:09:29,941 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 16:09:29,943 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 16:09:30,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 16:09:30,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:09:30,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 16:09:30,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:09:30,120 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 16:09:30,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:09:30,304 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 16:09:30,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575919180] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:09:30,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:09:30,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-24 16:09:30,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130376641] [2023-08-24 16:09:30,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:09:30,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 16:09:30,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:09:30,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 16:09:30,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2023-08-24 16:09:30,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:09:30,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 726 places, 3566 transitions, 141148 flow. Second operand has 27 states, 27 states have (on average 53.888888888888886) internal successors, (1455), 27 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 16:09:30,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:09:30,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:09:30,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:09:45,903 INFO L124 PetriNetUnfolderBase]: 8301/14394 cut-off events. [2023-08-24 16:09:45,903 INFO L125 PetriNetUnfolderBase]: For 640298/640298 co-relation queries the response was YES. [2023-08-24 16:09:46,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226397 conditions, 14394 events. 8301/14394 cut-off events. For 640298/640298 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 113221 event pairs, 79 based on Foata normal form. 66/14460 useless extension candidates. Maximal degree in co-relation 225446. Up to 3955 conditions per place. [2023-08-24 16:09:46,243 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 557 selfloop transitions, 3347 changer transitions 33/3937 dead transitions. [2023-08-24 16:09:46,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 778 places, 3937 transitions, 160164 flow [2023-08-24 16:09:46,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-24 16:09:46,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-24 16:09:46,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3090 transitions. [2023-08-24 16:09:46,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40711462450592883 [2023-08-24 16:09:46,246 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3090 transitions. [2023-08-24 16:09:46,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3090 transitions. [2023-08-24 16:09:46,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:09:46,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3090 transitions. [2023-08-24 16:09:46,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 56.18181818181818) internal successors, (3090), 55 states have internal predecessors, (3090), 0 states have call successors, (0), 0 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 16:09:46,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 138.0) internal successors, (7728), 56 states have internal predecessors, (7728), 0 states have call successors, (0), 0 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 16:09:46,252 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 138.0) internal successors, (7728), 56 states have internal predecessors, (7728), 0 states have call successors, (0), 0 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 16:09:46,253 INFO L175 Difference]: Start difference. First operand has 726 places, 3566 transitions, 141148 flow. Second operand 55 states and 3090 transitions. [2023-08-24 16:09:46,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 778 places, 3937 transitions, 160164 flow [2023-08-24 16:10:06,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 726 places, 3937 transitions, 156482 flow, removed 129 selfloop flow, removed 52 redundant places. [2023-08-24 16:10:06,246 INFO L231 Difference]: Finished difference. Result has 735 places, 3770 transitions, 153897 flow [2023-08-24 16:10:06,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=137298, PETRI_DIFFERENCE_MINUEND_PLACES=672, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=153897, PETRI_PLACES=735, PETRI_TRANSITIONS=3770} [2023-08-24 16:10:06,250 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 715 predicate places. [2023-08-24 16:10:06,250 INFO L495 AbstractCegarLoop]: Abstraction has has 735 places, 3770 transitions, 153897 flow [2023-08-24 16:10:06,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 53.888888888888886) internal successors, (1455), 27 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 16:10:06,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:10:06,251 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:10:06,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 16:10:06,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:10:06,455 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 16:10:06,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:10:06,456 INFO L85 PathProgramCache]: Analyzing trace with hash 555034459, now seen corresponding path program 31 times [2023-08-24 16:10:06,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:10:06,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025167557] [2023-08-24 16:10:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:10:06,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:10:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:10:06,647 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 16:10:06,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:10:06,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025167557] [2023-08-24 16:10:06,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025167557] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:10:06,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851077740] [2023-08-24 16:10:06,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:10:06,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:10:06,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:10:06,648 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 16:10:06,650 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 16:10:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:10:06,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 16:10:06,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:10:06,834 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 16:10:06,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:10:07,084 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 16:10:07,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851077740] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:10:07,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:10:07,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-24 16:10:07,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18588568] [2023-08-24 16:10:07,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:10:07,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 16:10:07,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:10:07,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 16:10:07,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2023-08-24 16:10:07,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:10:07,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 3770 transitions, 153897 flow. Second operand has 27 states, 27 states have (on average 53.888888888888886) internal successors, (1455), 27 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 16:10:07,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:10:07,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:10:07,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:10:21,287 INFO L124 PetriNetUnfolderBase]: 8516/14793 cut-off events. [2023-08-24 16:10:21,287 INFO L125 PetriNetUnfolderBase]: For 714392/714392 co-relation queries the response was YES. [2023-08-24 16:10:21,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240699 conditions, 14793 events. 8516/14793 cut-off events. For 714392/714392 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 117279 event pairs, 107 based on Foata normal form. 22/14815 useless extension candidates. Maximal degree in co-relation 239715. Up to 5005 conditions per place. [2023-08-24 16:10:21,574 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 684 selfloop transitions, 3319 changer transitions 29/4032 dead transitions. [2023-08-24 16:10:21,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 4032 transitions, 168868 flow [2023-08-24 16:10:21,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-24 16:10:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-24 16:10:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2867 transitions. [2023-08-24 16:10:21,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40736004546746235 [2023-08-24 16:10:21,576 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2867 transitions. [2023-08-24 16:10:21,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2867 transitions. [2023-08-24 16:10:21,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:10:21,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2867 transitions. [2023-08-24 16:10:21,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 56.21568627450981) internal successors, (2867), 51 states have internal predecessors, (2867), 0 states have call successors, (0), 0 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 16:10:21,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 138.0) internal successors, (7176), 52 states have internal predecessors, (7176), 0 states have call successors, (0), 0 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 16:10:21,582 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 138.0) internal successors, (7176), 52 states have internal predecessors, (7176), 0 states have call successors, (0), 0 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 16:10:21,582 INFO L175 Difference]: Start difference. First operand has 735 places, 3770 transitions, 153897 flow. Second operand 51 states and 2867 transitions. [2023-08-24 16:10:21,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 785 places, 4032 transitions, 168868 flow [2023-08-24 16:10:46,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 748 places, 4032 transitions, 163967 flow, removed 394 selfloop flow, removed 37 redundant places. [2023-08-24 16:10:46,185 INFO L231 Difference]: Finished difference. Result has 753 places, 3867 transitions, 160559 flow [2023-08-24 16:10:46,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=149172, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=160559, PETRI_PLACES=753, PETRI_TRANSITIONS=3867} [2023-08-24 16:10:46,188 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 733 predicate places. [2023-08-24 16:10:46,188 INFO L495 AbstractCegarLoop]: Abstraction has has 753 places, 3867 transitions, 160559 flow [2023-08-24 16:10:46,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 53.888888888888886) internal successors, (1455), 27 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 16:10:46,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:10:46,189 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:10:46,193 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 16:10:46,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:10:46,393 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 16:10:46,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:10:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1958287365, now seen corresponding path program 32 times [2023-08-24 16:10:46,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:10:46,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598903776] [2023-08-24 16:10:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:10:46,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:10:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:10:46,513 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 16:10:46,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:10:46,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598903776] [2023-08-24 16:10:46,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598903776] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:10:46,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825012751] [2023-08-24 16:10:46,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:10:46,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:10:46,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:10:46,515 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 16:10:46,516 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 16:10:46,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:10:46,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:10:46,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 16:10:46,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:10:46,692 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 16:10:46,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:10:46,899 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 16:10:46,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825012751] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:10:46,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:10:46,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-08-24 16:10:46,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725520522] [2023-08-24 16:10:46,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:10:46,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 16:10:46,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:10:46,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 16:10:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2023-08-24 16:10:46,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:10:46,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 753 places, 3867 transitions, 160559 flow. Second operand has 28 states, 28 states have (on average 53.92857142857143) internal successors, (1510), 28 states have internal predecessors, (1510), 0 states have call successors, (0), 0 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 16:10:46,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:10:46,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:10:46,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:11:03,283 INFO L124 PetriNetUnfolderBase]: 9088/15779 cut-off events. [2023-08-24 16:11:03,283 INFO L125 PetriNetUnfolderBase]: For 803580/803580 co-relation queries the response was YES. [2023-08-24 16:11:03,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261421 conditions, 15779 events. 9088/15779 cut-off events. For 803580/803580 co-relation queries the response was YES. Maximal size of possible extension queue 1129. Compared 126117 event pairs, 83 based on Foata normal form. 32/15811 useless extension candidates. Maximal degree in co-relation 260436. Up to 4647 conditions per place. [2023-08-24 16:11:03,591 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 721 selfloop transitions, 3532 changer transitions 20/4273 dead transitions. [2023-08-24 16:11:03,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 801 places, 4273 transitions, 182674 flow [2023-08-24 16:11:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-24 16:11:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-24 16:11:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2756 transitions. [2023-08-24 16:11:03,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075717243419107 [2023-08-24 16:11:03,593 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2756 transitions. [2023-08-24 16:11:03,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2756 transitions. [2023-08-24 16:11:03,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:11:03,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2756 transitions. [2023-08-24 16:11:03,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 56.244897959183675) internal successors, (2756), 49 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:11:03,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 138.0) internal successors, (6900), 50 states have internal predecessors, (6900), 0 states have call successors, (0), 0 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 16:11:03,599 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 138.0) internal successors, (6900), 50 states have internal predecessors, (6900), 0 states have call successors, (0), 0 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 16:11:03,599 INFO L175 Difference]: Start difference. First operand has 753 places, 3867 transitions, 160559 flow. Second operand 49 states and 2756 transitions. [2023-08-24 16:11:03,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 801 places, 4273 transitions, 182674 flow [2023-08-24 16:11:31,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 777 places, 4273 transitions, 181065 flow, removed 302 selfloop flow, removed 24 redundant places. [2023-08-24 16:11:31,505 INFO L231 Difference]: Finished difference. Result has 786 places, 4143 transitions, 180337 flow [2023-08-24 16:11:31,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=159085, PETRI_DIFFERENCE_MINUEND_PLACES=729, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=180337, PETRI_PLACES=786, PETRI_TRANSITIONS=4143} [2023-08-24 16:11:31,507 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 766 predicate places. [2023-08-24 16:11:31,507 INFO L495 AbstractCegarLoop]: Abstraction has has 786 places, 4143 transitions, 180337 flow [2023-08-24 16:11:31,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 53.92857142857143) internal successors, (1510), 28 states have internal predecessors, (1510), 0 states have call successors, (0), 0 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 16:11:31,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:11:31,508 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:11:31,512 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 16:11:31,712 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,SelfDestructingSolverStorable34 [2023-08-24 16:11:31,713 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 16:11:31,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:11:31,713 INFO L85 PathProgramCache]: Analyzing trace with hash -553947031, now seen corresponding path program 33 times [2023-08-24 16:11:31,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:11:31,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467790890] [2023-08-24 16:11:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:11:31,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:11:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:11:31,836 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 16:11:31,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:11:31,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467790890] [2023-08-24 16:11:31,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467790890] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:11:31,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038310541] [2023-08-24 16:11:31,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:11:31,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:11:31,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:11:31,837 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 16:11:31,838 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 16:11:31,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 16:11:31,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:11:31,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 16:11:31,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:11:32,008 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 16:11:32,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:11:32,205 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 16:11:32,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038310541] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:11:32,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:11:32,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-08-24 16:11:32,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6281509] [2023-08-24 16:11:32,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:11:32,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 16:11:32,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:11:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 16:11:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2023-08-24 16:11:32,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:11:32,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 786 places, 4143 transitions, 180337 flow. Second operand has 28 states, 28 states have (on average 53.857142857142854) internal successors, (1508), 28 states have internal predecessors, (1508), 0 states have call successors, (0), 0 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 16:11:32,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:11:32,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:11:32,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:11:53,205 INFO L124 PetriNetUnfolderBase]: 9731/17002 cut-off events. [2023-08-24 16:11:53,205 INFO L125 PetriNetUnfolderBase]: For 922028/922028 co-relation queries the response was YES. [2023-08-24 16:11:53,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292129 conditions, 17002 events. 9731/17002 cut-off events. For 922028/922028 co-relation queries the response was YES. Maximal size of possible extension queue 1196. Compared 138350 event pairs, 145 based on Foata normal form. 10/17012 useless extension candidates. Maximal degree in co-relation 291092. Up to 5589 conditions per place. [2023-08-24 16:11:53,538 INFO L140 encePairwiseOnDemand]: 130/138 looper letters, 974 selfloop transitions, 3644 changer transitions 0/4618 dead transitions. [2023-08-24 16:11:53,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 857 places, 4618 transitions, 205096 flow [2023-08-24 16:11:53,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-24 16:11:53,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-24 16:11:53,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4038 transitions. [2023-08-24 16:11:53,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40640096618357485 [2023-08-24 16:11:53,542 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4038 transitions. [2023-08-24 16:11:53,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4038 transitions. [2023-08-24 16:11:53,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:11:53,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4038 transitions. [2023-08-24 16:11:53,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 56.083333333333336) internal successors, (4038), 72 states have internal predecessors, (4038), 0 states have call successors, (0), 0 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 16:11:53,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 138.0) internal successors, (10074), 73 states have internal predecessors, (10074), 0 states have call successors, (0), 0 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 16:11:53,550 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 138.0) internal successors, (10074), 73 states have internal predecessors, (10074), 0 states have call successors, (0), 0 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 16:11:53,550 INFO L175 Difference]: Start difference. First operand has 786 places, 4143 transitions, 180337 flow. Second operand 72 states and 4038 transitions. [2023-08-24 16:11:53,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 857 places, 4618 transitions, 205096 flow [2023-08-24 16:12:27,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 841 places, 4618 transitions, 204143 flow, removed 402 selfloop flow, removed 16 redundant places. [2023-08-24 16:12:27,318 INFO L231 Difference]: Finished difference. Result has 847 places, 4445 transitions, 202719 flow [2023-08-24 16:12:27,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=179506, PETRI_DIFFERENCE_MINUEND_PLACES=770, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=202719, PETRI_PLACES=847, PETRI_TRANSITIONS=4445} [2023-08-24 16:12:27,320 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 827 predicate places. [2023-08-24 16:12:27,320 INFO L495 AbstractCegarLoop]: Abstraction has has 847 places, 4445 transitions, 202719 flow [2023-08-24 16:12:27,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 53.857142857142854) internal successors, (1508), 28 states have internal predecessors, (1508), 0 states have call successors, (0), 0 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 16:12:27,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:12:27,321 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:12:27,325 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 16:12:27,525 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,SelfDestructingSolverStorable35 [2023-08-24 16:12:27,525 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 16:12:27,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:12:27,525 INFO L85 PathProgramCache]: Analyzing trace with hash 2039114821, now seen corresponding path program 34 times [2023-08-24 16:12:27,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:12:27,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894663914] [2023-08-24 16:12:27,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:12:27,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:12:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:12:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:12:27,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:12:27,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894663914] [2023-08-24 16:12:27,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894663914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:12:27,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083359857] [2023-08-24 16:12:27,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:12:27,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:12:27,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:12:27,652 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 16:12:27,654 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 16:12:27,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:12:27,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:12:27,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 16:12:27,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:12:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:12:27,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:12:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:12:27,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083359857] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:12:27,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:12:27,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 24 [2023-08-24 16:12:27,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961200129] [2023-08-24 16:12:27,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:12:27,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 16:12:27,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:12:27,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 16:12:27,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2023-08-24 16:12:27,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:12:27,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 847 places, 4445 transitions, 202719 flow. Second operand has 24 states, 24 states have (on average 54.0) internal successors, (1296), 24 states have internal predecessors, (1296), 0 states have call successors, (0), 0 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 16:12:27,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:12:27,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:12:27,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:12:52,574 INFO L124 PetriNetUnfolderBase]: 11287/19702 cut-off events. [2023-08-24 16:12:52,574 INFO L125 PetriNetUnfolderBase]: For 1129100/1129100 co-relation queries the response was YES. [2023-08-24 16:12:52,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350746 conditions, 19702 events. 11287/19702 cut-off events. For 1129100/1129100 co-relation queries the response was YES. Maximal size of possible extension queue 1388. Compared 164183 event pairs, 83 based on Foata normal form. 94/19796 useless extension candidates. Maximal degree in co-relation 349394. Up to 5252 conditions per place. [2023-08-24 16:12:52,989 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 1479 selfloop transitions, 3796 changer transitions 37/5312 dead transitions. [2023-08-24 16:12:52,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 897 places, 5312 transitions, 248867 flow [2023-08-24 16:12:52,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-24 16:12:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-24 16:12:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2921 transitions. [2023-08-24 16:12:52,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40705128205128205 [2023-08-24 16:12:52,991 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2921 transitions. [2023-08-24 16:12:52,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2921 transitions. [2023-08-24 16:12:52,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:12:52,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2921 transitions. [2023-08-24 16:12:52,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 56.17307692307692) internal successors, (2921), 52 states have internal predecessors, (2921), 0 states have call successors, (0), 0 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 16:12:52,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 138.0) internal successors, (7314), 53 states have internal predecessors, (7314), 0 states have call successors, (0), 0 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 16:12:52,997 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 138.0) internal successors, (7314), 53 states have internal predecessors, (7314), 0 states have call successors, (0), 0 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 16:12:52,997 INFO L175 Difference]: Start difference. First operand has 847 places, 4445 transitions, 202719 flow. Second operand 52 states and 2921 transitions. [2023-08-24 16:12:52,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 897 places, 5312 transitions, 248867 flow [2023-08-24 16:13:42,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 875 places, 5312 transitions, 243927 flow, removed 542 selfloop flow, removed 22 redundant places. [2023-08-24 16:13:42,462 INFO L231 Difference]: Finished difference. Result has 883 places, 5128 transitions, 240886 flow [2023-08-24 16:13:42,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=198097, PETRI_DIFFERENCE_MINUEND_PLACES=824, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=240886, PETRI_PLACES=883, PETRI_TRANSITIONS=5128} [2023-08-24 16:13:42,465 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 863 predicate places. [2023-08-24 16:13:42,465 INFO L495 AbstractCegarLoop]: Abstraction has has 883 places, 5128 transitions, 240886 flow [2023-08-24 16:13:42,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.0) internal successors, (1296), 24 states have internal predecessors, (1296), 0 states have call successors, (0), 0 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 16:13:42,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:13:42,465 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:13:42,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-24 16:13:42,670 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,SelfDestructingSolverStorable36 [2023-08-24 16:13:42,670 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 16:13:42,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:13:42,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1608639387, now seen corresponding path program 35 times [2023-08-24 16:13:42,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:13:42,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390502834] [2023-08-24 16:13:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:13:42,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:13:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:13:42,800 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 16:13:42,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:13:42,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390502834] [2023-08-24 16:13:42,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390502834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:13:42,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164779162] [2023-08-24 16:13:42,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:13:42,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:13:42,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:13:42,801 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 16:13:42,803 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 16:13:42,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 16:13:42,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:13:42,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 16:13:42,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:13:42,996 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 16:13:42,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:13:43,191 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 16:13:43,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164779162] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:13:43,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:13:43,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-24 16:13:43,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522032438] [2023-08-24 16:13:43,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:13:43,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 16:13:43,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:13:43,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 16:13:43,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2023-08-24 16:13:43,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:13:43,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 883 places, 5128 transitions, 240886 flow. Second operand has 29 states, 29 states have (on average 53.827586206896555) internal successors, (1561), 29 states have internal predecessors, (1561), 0 states have call successors, (0), 0 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 16:13:43,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:13:43,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:13:43,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:14,544 INFO L124 PetriNetUnfolderBase]: 11918/20817 cut-off events. [2023-08-24 16:14:14,545 INFO L125 PetriNetUnfolderBase]: For 1305417/1305417 co-relation queries the response was YES. [2023-08-24 16:14:15,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379315 conditions, 20817 events. 11918/20817 cut-off events. For 1305417/1305417 co-relation queries the response was YES. Maximal size of possible extension queue 1470. Compared 175304 event pairs, 87 based on Foata normal form. 36/20853 useless extension candidates. Maximal degree in co-relation 377986. Up to 5346 conditions per place. [2023-08-24 16:14:15,515 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 759 selfloop transitions, 4731 changer transitions 59/5549 dead transitions. [2023-08-24 16:14:15,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 934 places, 5549 transitions, 268195 flow [2023-08-24 16:14:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-24 16:14:15,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-24 16:14:15,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2918 transitions. [2023-08-24 16:14:15,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066332218506132 [2023-08-24 16:14:15,520 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2918 transitions. [2023-08-24 16:14:15,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2918 transitions. [2023-08-24 16:14:15,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:15,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2918 transitions. [2023-08-24 16:14:15,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 56.11538461538461) internal successors, (2918), 52 states have internal predecessors, (2918), 0 states have call successors, (0), 0 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 16:14:15,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 138.0) internal successors, (7314), 53 states have internal predecessors, (7314), 0 states have call successors, (0), 0 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 16:14:15,526 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 138.0) internal successors, (7314), 53 states have internal predecessors, (7314), 0 states have call successors, (0), 0 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 16:14:15,526 INFO L175 Difference]: Start difference. First operand has 883 places, 5128 transitions, 240886 flow. Second operand 52 states and 2918 transitions. [2023-08-24 16:14:15,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 934 places, 5549 transitions, 268195 flow [2023-08-24 16:15:20,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 912 places, 5549 transitions, 266178 flow, removed 650 selfloop flow, removed 22 redundant places. [2023-08-24 16:15:21,028 INFO L231 Difference]: Finished difference. Result has 917 places, 5398 transitions, 263016 flow [2023-08-24 16:15:21,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=239065, PETRI_DIFFERENCE_MINUEND_PLACES=861, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=263016, PETRI_PLACES=917, PETRI_TRANSITIONS=5398} [2023-08-24 16:15:21,032 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 897 predicate places. [2023-08-24 16:15:21,032 INFO L495 AbstractCegarLoop]: Abstraction has has 917 places, 5398 transitions, 263016 flow [2023-08-24 16:15:21,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 53.827586206896555) internal successors, (1561), 29 states have internal predecessors, (1561), 0 states have call successors, (0), 0 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 16:15:21,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:15:21,032 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:15:21,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-24 16:15:21,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:15:21,238 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 16:15:21,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:15:21,238 INFO L85 PathProgramCache]: Analyzing trace with hash 715335657, now seen corresponding path program 36 times [2023-08-24 16:15:21,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:15:21,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538067293] [2023-08-24 16:15:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:15:21,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:15:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:15:21,365 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 16:15:21,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:15:21,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538067293] [2023-08-24 16:15:21,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538067293] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:15:21,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633960087] [2023-08-24 16:15:21,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:15:21,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:15:21,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:15:21,366 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 16:15:21,368 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 16:15:21,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 16:15:21,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:15:21,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 16:15:21,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:15:21,559 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 16:15:21,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:15:21,778 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 16:15:21,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633960087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:15:21,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:15:21,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-24 16:15:21,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471647570] [2023-08-24 16:15:21,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:15:21,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 16:15:21,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:15:21,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 16:15:21,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2023-08-24 16:15:21,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:15:21,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 917 places, 5398 transitions, 263016 flow. Second operand has 29 states, 29 states have (on average 53.827586206896555) internal successors, (1561), 29 states have internal predecessors, (1561), 0 states have call successors, (0), 0 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 16:15:21,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:15:21,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:15:21,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:16:00,970 INFO L124 PetriNetUnfolderBase]: 12693/22230 cut-off events. [2023-08-24 16:16:00,970 INFO L125 PetriNetUnfolderBase]: For 1473542/1473542 co-relation queries the response was YES. [2023-08-24 16:16:01,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418710 conditions, 22230 events. 12693/22230 cut-off events. For 1473542/1473542 co-relation queries the response was YES. Maximal size of possible extension queue 1562. Compared 189765 event pairs, 225 based on Foata normal form. 22/22252 useless extension candidates. Maximal degree in co-relation 417348. Up to 7144 conditions per place. [2023-08-24 16:16:01,474 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 1587 selfloop transitions, 4289 changer transitions 41/5917 dead transitions. [2023-08-24 16:16:01,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 971 places, 5917 transitions, 295596 flow [2023-08-24 16:16:01,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-24 16:16:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-24 16:16:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3091 transitions. [2023-08-24 16:16:01,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4072463768115942 [2023-08-24 16:16:01,477 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3091 transitions. [2023-08-24 16:16:01,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3091 transitions. [2023-08-24 16:16:01,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:16:01,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3091 transitions. [2023-08-24 16:16:01,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 56.2) internal successors, (3091), 55 states have internal predecessors, (3091), 0 states have call successors, (0), 0 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 16:16:01,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 138.0) internal successors, (7728), 56 states have internal predecessors, (7728), 0 states have call successors, (0), 0 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 16:16:01,482 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 138.0) internal successors, (7728), 56 states have internal predecessors, (7728), 0 states have call successors, (0), 0 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 16:16:01,482 INFO L175 Difference]: Start difference. First operand has 917 places, 5398 transitions, 263016 flow. Second operand 55 states and 3091 transitions. [2023-08-24 16:16:01,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 971 places, 5917 transitions, 295596 flow [2023-08-24 16:17:25,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 945 places, 5917 transitions, 292969 flow, removed 641 selfloop flow, removed 26 redundant places. [2023-08-24 16:17:25,269 INFO L231 Difference]: Finished difference. Result has 954 places, 5759 transitions, 289645 flow [2023-08-24 16:17:25,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=260385, PETRI_DIFFERENCE_MINUEND_PLACES=891, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3888, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=289645, PETRI_PLACES=954, PETRI_TRANSITIONS=5759} [2023-08-24 16:17:25,274 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 934 predicate places. [2023-08-24 16:17:25,274 INFO L495 AbstractCegarLoop]: Abstraction has has 954 places, 5759 transitions, 289645 flow [2023-08-24 16:17:25,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 53.827586206896555) internal successors, (1561), 29 states have internal predecessors, (1561), 0 states have call successors, (0), 0 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 16:17:25,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:17:25,274 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:17:25,280 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 16:17:25,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 16:17:25,475 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 16:17:25,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:17:25,475 INFO L85 PathProgramCache]: Analyzing trace with hash -840141052, now seen corresponding path program 37 times [2023-08-24 16:17:25,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:17:25,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509745655] [2023-08-24 16:17:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:17:25,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:17:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:17:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:17:25,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:17:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509745655] [2023-08-24 16:17:25,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509745655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:17:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806606506] [2023-08-24 16:17:25,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:17:25,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:17:25,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:17:25,590 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 16:17:25,592 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 16:17:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:17:25,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 16:17:25,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:17:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:17:25,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:17:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:17:25,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806606506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:17:25,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:17:25,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-08-24 16:17:25,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867107420] [2023-08-24 16:17:25,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:17:25,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 16:17:25,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:17:25,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 16:17:25,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-08-24 16:17:25,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:17:25,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 954 places, 5759 transitions, 289645 flow. Second operand has 24 states, 24 states have (on average 53.791666666666664) internal successors, (1291), 24 states have internal predecessors, (1291), 0 states have call successors, (0), 0 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 16:17:25,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:17:25,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:17:25,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:18:08,950 INFO L124 PetriNetUnfolderBase]: 12882/22403 cut-off events. [2023-08-24 16:18:08,950 INFO L125 PetriNetUnfolderBase]: For 1577831/1577831 co-relation queries the response was YES. [2023-08-24 16:18:10,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433590 conditions, 22403 events. 12882/22403 cut-off events. For 1577831/1577831 co-relation queries the response was YES. Maximal size of possible extension queue 1572. Compared 189624 event pairs, 589 based on Foata normal form. 66/22469 useless extension candidates. Maximal degree in co-relation 432711. Up to 12082 conditions per place. [2023-08-24 16:18:10,199 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 1872 selfloop transitions, 4065 changer transitions 6/5943 dead transitions. [2023-08-24 16:18:10,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 990 places, 5943 transitions, 308289 flow [2023-08-24 16:18:10,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 16:18:10,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 16:18:10,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2185 transitions. [2023-08-24 16:18:10,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405982905982906 [2023-08-24 16:18:10,201 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2185 transitions. [2023-08-24 16:18:10,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2185 transitions. [2023-08-24 16:18:10,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:18:10,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2185 transitions. [2023-08-24 16:18:10,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.02564102564103) internal successors, (2185), 39 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:10,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 138.0) internal successors, (5520), 40 states have internal predecessors, (5520), 0 states have call successors, (0), 0 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 16:18:10,205 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 138.0) internal successors, (5520), 40 states have internal predecessors, (5520), 0 states have call successors, (0), 0 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 16:18:10,205 INFO L175 Difference]: Start difference. First operand has 954 places, 5759 transitions, 289645 flow. Second operand 39 states and 2185 transitions. [2023-08-24 16:18:10,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 990 places, 5943 transitions, 308289 flow [2023-08-24 16:19:38,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 978 places, 5943 transitions, 307224 flow, removed 473 selfloop flow, removed 12 redundant places. [2023-08-24 16:19:38,319 INFO L231 Difference]: Finished difference. Result has 990 places, 5870 transitions, 308291 flow [2023-08-24 16:19:38,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=287141, PETRI_DIFFERENCE_MINUEND_PLACES=940, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3928, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=308291, PETRI_PLACES=990, PETRI_TRANSITIONS=5870} [2023-08-24 16:19:38,323 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 970 predicate places. [2023-08-24 16:19:38,323 INFO L495 AbstractCegarLoop]: Abstraction has has 990 places, 5870 transitions, 308291 flow [2023-08-24 16:19:38,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.791666666666664) internal successors, (1291), 24 states have internal predecessors, (1291), 0 states have call successors, (0), 0 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 16:19:38,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:19:38,323 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:19:38,330 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 16:19:38,528 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,SelfDestructingSolverStorable39 [2023-08-24 16:19:38,528 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 16:19:38,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:19:38,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1512794197, now seen corresponding path program 38 times [2023-08-24 16:19:38,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:19:38,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490141598] [2023-08-24 16:19:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:19:38,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:19:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:19:38,653 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 16:19:38,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:19:38,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490141598] [2023-08-24 16:19:38,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490141598] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:19:38,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41194879] [2023-08-24 16:19:38,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:19:38,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:19:38,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:19:38,654 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 16:19:38,655 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 16:19:38,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:19:38,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:19:38,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 16:19:38,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:19:38,848 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 16:19:38,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:19:39,092 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 16:19:39,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41194879] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:19:39,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:19:39,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-08-24 16:19:39,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731456736] [2023-08-24 16:19:39,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:19:39,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 16:19:39,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:19:39,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 16:19:39,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2023-08-24 16:19:39,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 138 [2023-08-24 16:19:39,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 990 places, 5870 transitions, 308291 flow. Second operand has 30 states, 30 states have (on average 53.833333333333336) internal successors, (1615), 30 states have internal predecessors, (1615), 0 states have call successors, (0), 0 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 16:19:39,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:19:39,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 138 [2023-08-24 16:19:39,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:20:44,393 INFO L124 PetriNetUnfolderBase]: 16947/29594 cut-off events. [2023-08-24 16:20:44,394 INFO L125 PetriNetUnfolderBase]: For 2340385/2340385 co-relation queries the response was YES. Received shutdown request... [2023-08-24 16:20:44,832 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 16:20:44,832 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 16:20:45,848 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 16:20:45,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-24 16:20:46,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592141 conditions, 29594 events. 16947/29594 cut-off events. For 2340385/2340385 co-relation queries the response was YES. Maximal size of possible extension queue 1956. Compared 261393 event pairs, 223 based on Foata normal form. 108/29702 useless extension candidates. Maximal degree in co-relation 591668. Up to 7246 conditions per place. [2023-08-24 16:20:46,391 INFO L140 encePairwiseOnDemand]: 131/138 looper letters, 2518 selfloop transitions, 5225 changer transitions 99/7842 dead transitions. [2023-08-24 16:20:46,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1060 places, 7842 transitions, 422491 flow [2023-08-24 16:20:46,393 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 16:20:46,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-24 16:20:46,393 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-24 16:20:46,394 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 16:20:46,394 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 16:20:46,394 INFO L445 BasicCegarLoop]: Path program histogram: [38, 2, 1] [2023-08-24 16:20:46,396 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 16:20:46,396 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 16:20:46,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 04:20:46 BasicIcfg [2023-08-24 16:20:46,398 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 16:20:46,398 INFO L158 Benchmark]: Toolchain (without parser) took 851030.53ms. Allocated memory was 364.9MB in the beginning and 6.4GB in the end (delta: 6.1GB). Free memory was 341.8MB in the beginning and 4.7GB in the end (delta: -4.4GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. [2023-08-24 16:20:46,398 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 364.9MB. Free memory is still 341.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 16:20:46,398 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.32ms. Allocated memory is still 364.9MB. Free memory was 341.8MB in the beginning and 330.3MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 16:20:46,399 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.93ms. Allocated memory is still 364.9MB. Free memory was 330.3MB in the beginning and 328.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 16:20:46,399 INFO L158 Benchmark]: Boogie Preprocessor took 28.28ms. Allocated memory is still 364.9MB. Free memory was 328.8MB in the beginning and 327.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 16:20:46,399 INFO L158 Benchmark]: RCFGBuilder took 255.91ms. Allocated memory is still 364.9MB. Free memory was 327.6MB in the beginning and 313.3MB in the end (delta: 14.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 16:20:46,399 INFO L158 Benchmark]: TraceAbstraction took 850536.26ms. Allocated memory was 364.9MB in the beginning and 6.4GB in the end (delta: 6.1GB). Free memory was 312.9MB in the beginning and 4.7GB in the end (delta: -4.4GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. [2023-08-24 16:20:46,400 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 364.9MB. Free memory is still 341.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 182.32ms. Allocated memory is still 364.9MB. Free memory was 341.8MB in the beginning and 330.3MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 23.93ms. Allocated memory is still 364.9MB. Free memory was 330.3MB in the beginning and 328.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 28.28ms. Allocated memory is still 364.9MB. Free memory was 328.8MB in the beginning and 327.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 255.91ms. Allocated memory is still 364.9MB. Free memory was 327.6MB in the beginning and 313.3MB in the end (delta: 14.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 850536.26ms. Allocated memory was 364.9MB in the beginning and 6.4GB in the end (delta: 6.1GB). Free memory was 312.9MB in the beginning and 4.7GB in the end (delta: -4.4GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 68 PlacesBefore, 20 PlacesAfterwards, 67 TransitionsBefore, 15 TransitionsAfterwards, 436 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 61 TotalNumberOfCompositions, 452 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 446, independent: 444, independent conditional: 0, independent unconditional: 444, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 232, independent: 230, independent conditional: 0, independent unconditional: 230, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 446, independent: 214, independent conditional: 0, independent unconditional: 214, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 232, unknown conditional: 0, unknown unconditional: 232] , 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: 77]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 90 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: 850.4s, OverallIterations: 41, TraceHistogramMax: 4, PathProgramHistogramMax: 38, EmptinessCheckTime: 0.0s, AutomataDifference: 824.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3458 SdHoareTripleChecker+Valid, 8.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3458 mSDsluCounter, 669 SdHoareTripleChecker+Invalid, 6.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 474 mSDsCounter, 958 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19981 IncrementalHoareTripleChecker+Invalid, 20939 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 958 mSolverCounterUnsat, 195 mSDtfsCounter, 19981 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3447 GetRequests, 1679 SyntacticMatches, 73 SemanticMatches, 1695 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28861 ImplicationChecksByTransitivity, 19.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=308291occurred in iteration=40, InterpolantAutomatonStates: 1295, 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: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 12.8s InterpolantComputationTime, 1439 NumberOfCodeBlocks, 1426 NumberOfCodeBlocksAsserted, 129 NumberOfCheckSat, 2013 ConstructedInterpolants, 0 QuantifiedInterpolants, 10779 SizeOfPredicates, 256 NumberOfNonLiveVariables, 4757 ConjunctsInSsa, 451 ConjunctsInUnsatCore, 118 InterpolantComputations, 3 PerfectInterpolantSequences, 296/1173 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