/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-bad-threaded-sum-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 14:59:17,826 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 14:59:17,899 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 14:59:17,904 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 14:59:17,905 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 14:59:17,936 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 14:59:17,937 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 14:59:17,941 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 14:59:17,942 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 14:59:17,946 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 14:59:17,946 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 14:59:17,946 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 14:59:17,946 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 14:59:17,948 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 14:59:17,948 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 14:59:17,948 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 14:59:17,948 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 14:59:17,948 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 14:59:17,949 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 14:59:17,949 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 14:59:17,949 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 14:59:17,950 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 14:59:17,950 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 14:59:17,950 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 14:59:17,951 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 14:59:17,951 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 14:59:17,951 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 14:59:17,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:59:17,951 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 14:59:17,952 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 14:59:17,953 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 14:59:17,953 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 14:59:17,953 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 14:59:17,953 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 14:59:17,953 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 14:59:17,954 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 14:59:18,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 14:59:18,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 14:59:18,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 14:59:18,285 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 14:59:18,285 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 14:59:18,286 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-08-24 14:59:19,448 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 14:59:19,609 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 14:59:19,612 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-08-24 14:59:19,620 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c5c9035a/7e95e1385b0842eda6a113cbc2f08250/FLAG85dc285d5 [2023-08-24 14:59:19,638 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c5c9035a/7e95e1385b0842eda6a113cbc2f08250 [2023-08-24 14:59:19,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 14:59:19,646 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 14:59:19,649 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 14:59:19,649 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 14:59:19,651 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 14:59:19,652 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:59:19" (1/1) ... [2023-08-24 14:59:19,653 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cdfb3e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:19, skipping insertion in model container [2023-08-24 14:59:19,653 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:59:19" (1/1) ... [2023-08-24 14:59:19,674 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 14:59:19,845 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-bad-threaded-sum-2.wvr.c[2476,2489] [2023-08-24 14:59:19,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:59:19,858 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 14:59:19,892 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-bad-threaded-sum-2.wvr.c[2476,2489] [2023-08-24 14:59:19,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:59:19,899 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:59:19,899 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:59:19,904 INFO L206 MainTranslator]: Completed translation [2023-08-24 14:59:19,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:19 WrapperNode [2023-08-24 14:59:19,905 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 14:59:19,906 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 14:59:19,906 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 14:59:19,906 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 14:59:19,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:19" (1/1) ... [2023-08-24 14:59:19,925 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:19" (1/1) ... [2023-08-24 14:59:19,947 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2023-08-24 14:59:19,948 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 14:59:19,948 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 14:59:19,948 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 14:59:19,949 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 14:59:19,956 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:19" (1/1) ... [2023-08-24 14:59:19,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:19" (1/1) ... [2023-08-24 14:59:19,960 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:19" (1/1) ... [2023-08-24 14:59:19,961 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:19" (1/1) ... [2023-08-24 14:59:19,975 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:19" (1/1) ... [2023-08-24 14:59:19,978 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:19" (1/1) ... [2023-08-24 14:59:19,979 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:19" (1/1) ... [2023-08-24 14:59:19,980 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:19" (1/1) ... [2023-08-24 14:59:19,982 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 14:59:19,982 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 14:59:19,982 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 14:59:19,983 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 14:59:19,983 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:19" (1/1) ... [2023-08-24 14:59:19,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:59:20,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:59:20,017 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 14:59:20,027 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 14:59:20,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 14:59:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 14:59:20,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 14:59:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 14:59:20,054 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 14:59:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 14:59:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 14:59:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 14:59:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 14:59:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 14:59:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 14:59:20,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 14:59:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 14:59:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 14:59:20,056 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 14:59:20,140 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 14:59:20,142 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 14:59:20,291 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 14:59:20,327 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 14:59:20,328 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 14:59:20,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:59:20 BoogieIcfgContainer [2023-08-24 14:59:20,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 14:59:20,331 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 14:59:20,331 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 14:59:20,334 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 14:59:20,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:59:19" (1/3) ... [2023-08-24 14:59:20,334 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3cc74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:59:20, skipping insertion in model container [2023-08-24 14:59:20,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:19" (2/3) ... [2023-08-24 14:59:20,335 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3cc74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:59:20, skipping insertion in model container [2023-08-24 14:59:20,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:59:20" (3/3) ... [2023-08-24 14:59:20,336 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2023-08-24 14:59:20,350 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 14:59:20,350 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 14:59:20,350 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 14:59:20,419 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 14:59:20,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 83 transitions, 182 flow [2023-08-24 14:59:20,485 INFO L124 PetriNetUnfolderBase]: 6/81 cut-off events. [2023-08-24 14:59:20,485 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 14:59:20,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 81 events. 6/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-24 14:59:20,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 83 transitions, 182 flow [2023-08-24 14:59:20,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2023-08-24 14:59:20,495 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 14:59:20,502 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 73 transitions, 158 flow [2023-08-24 14:59:20,504 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 73 transitions, 158 flow [2023-08-24 14:59:20,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 158 flow [2023-08-24 14:59:20,526 INFO L124 PetriNetUnfolderBase]: 6/73 cut-off events. [2023-08-24 14:59:20,526 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 14:59:20,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 6/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-24 14:59:20,528 INFO L119 LiptonReduction]: Number of co-enabled transitions 396 [2023-08-24 14:59:22,511 INFO L134 LiptonReduction]: Checked pairs total: 617 [2023-08-24 14:59:22,511 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-24 14:59:22,527 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 14:59:22,532 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;@5900af43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 14:59:22,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 14:59:22,537 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 14:59:22,538 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-08-24 14:59:22,538 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 14:59:22,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:22,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:59:22,539 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 14:59:22,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:22,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1488220568, now seen corresponding path program 1 times [2023-08-24 14:59:22,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:22,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867289059] [2023-08-24 14:59:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:22,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:23,185 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 14:59:23,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:23,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867289059] [2023-08-24 14:59:23,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867289059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:59:23,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:59:23,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:59:23,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292684350] [2023-08-24 14:59:23,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:59:23,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:59:23,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:23,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:59:23,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:59:23,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 148 [2023-08-24 14:59:23,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:23,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:23,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 148 [2023-08-24 14:59:23,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:23,336 INFO L124 PetriNetUnfolderBase]: 88/157 cut-off events. [2023-08-24 14:59:23,336 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 14:59:23,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 157 events. 88/157 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 433 event pairs, 18 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 270. Up to 120 conditions per place. [2023-08-24 14:59:23,340 INFO L140 encePairwiseOnDemand]: 143/148 looper letters, 28 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2023-08-24 14:59:23,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 33 transitions, 153 flow [2023-08-24 14:59:23,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 14:59:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 14:59:23,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 266 transitions. [2023-08-24 14:59:23,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44932432432432434 [2023-08-24 14:59:23,359 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 266 transitions. [2023-08-24 14:59:23,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 266 transitions. [2023-08-24 14:59:23,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:23,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 266 transitions. [2023-08-24 14:59:23,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:23,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:23,373 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:23,375 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 46 flow. Second operand 4 states and 266 transitions. [2023-08-24 14:59:23,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 33 transitions, 153 flow [2023-08-24 14:59:23,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 33 transitions, 139 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 14:59:23,379 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 70 flow [2023-08-24 14:59:23,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, 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=4, PETRI_FLOW=70, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-24 14:59:23,384 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-08-24 14:59:23,384 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 70 flow [2023-08-24 14:59:23,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:23,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:23,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:59:23,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 14:59:23,386 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 14:59:23,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:23,387 INFO L85 PathProgramCache]: Analyzing trace with hash 772847751, now seen corresponding path program 1 times [2023-08-24 14:59:23,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:23,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429467095] [2023-08-24 14:59:23,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:23,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:23,640 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 14:59:23,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:23,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429467095] [2023-08-24 14:59:23,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429467095] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:59:23,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275323220] [2023-08-24 14:59:23,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:23,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:59:23,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:59:23,649 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 14:59:23,668 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 14:59:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:23,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 14:59:23,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:59:23,935 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 14:59:23,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:59:24,048 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 14:59:24,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275323220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:59:24,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:59:24,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2023-08-24 14:59:24,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566420774] [2023-08-24 14:59:24,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:59:24,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 14:59:24,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:24,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 14:59:24,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-24 14:59:24,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 148 [2023-08-24 14:59:24,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 70 flow. Second operand has 10 states, 10 states have (on average 59.3) internal successors, (593), 10 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:24,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:24,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 148 [2023-08-24 14:59:24,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:24,263 INFO L124 PetriNetUnfolderBase]: 111/200 cut-off events. [2023-08-24 14:59:24,264 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-24 14:59:24,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 200 events. 111/200 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 547 event pairs, 4 based on Foata normal form. 20/202 useless extension candidates. Maximal degree in co-relation 161. Up to 66 conditions per place. [2023-08-24 14:59:24,266 INFO L140 encePairwiseOnDemand]: 139/148 looper letters, 44 selfloop transitions, 18 changer transitions 0/62 dead transitions. [2023-08-24 14:59:24,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 62 transitions, 307 flow [2023-08-24 14:59:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 14:59:24,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 14:59:24,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 740 transitions. [2023-08-24 14:59:24,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-24 14:59:24,269 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 740 transitions. [2023-08-24 14:59:24,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 740 transitions. [2023-08-24 14:59:24,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:24,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 740 transitions. [2023-08-24 14:59:24,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.666666666666664) internal successors, (740), 12 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:24,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 148.0) internal successors, (1924), 13 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:24,276 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 148.0) internal successors, (1924), 13 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:24,276 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 70 flow. Second operand 12 states and 740 transitions. [2023-08-24 14:59:24,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 62 transitions, 307 flow [2023-08-24 14:59:24,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 62 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 14:59:24,278 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 174 flow [2023-08-24 14:59:24,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=174, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-08-24 14:59:24,279 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 18 predicate places. [2023-08-24 14:59:24,279 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 174 flow [2023-08-24 14:59:24,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.3) internal successors, (593), 10 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:24,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:24,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:59:24,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 14:59:24,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:59:24,487 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 14:59:24,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:24,487 INFO L85 PathProgramCache]: Analyzing trace with hash -800121287, now seen corresponding path program 1 times [2023-08-24 14:59:24,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:24,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739359199] [2023-08-24 14:59:24,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:24,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:25,172 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 14:59:25,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:25,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739359199] [2023-08-24 14:59:25,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739359199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:59:25,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611941155] [2023-08-24 14:59:25,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:25,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:59:25,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:59:25,181 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 14:59:25,185 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 14:59:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:25,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 14:59:25,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:59:25,595 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 14:59:25,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:59:25,870 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 14:59:25,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611941155] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:59:25,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:59:25,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-24 14:59:25,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254703947] [2023-08-24 14:59:25,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:59:25,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 14:59:25,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:25,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 14:59:25,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-08-24 14:59:25,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 148 [2023-08-24 14:59:25,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 174 flow. Second operand has 20 states, 20 states have (on average 54.25) internal successors, (1085), 20 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:25,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:25,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 148 [2023-08-24 14:59:25,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:27,589 INFO L124 PetriNetUnfolderBase]: 429/757 cut-off events. [2023-08-24 14:59:27,590 INFO L125 PetriNetUnfolderBase]: For 1007/1007 co-relation queries the response was YES. [2023-08-24 14:59:27,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2625 conditions, 757 events. 429/757 cut-off events. For 1007/1007 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3329 event pairs, 12 based on Foata normal form. 5/762 useless extension candidates. Maximal degree in co-relation 1497. Up to 203 conditions per place. [2023-08-24 14:59:27,596 INFO L140 encePairwiseOnDemand]: 138/148 looper letters, 97 selfloop transitions, 94 changer transitions 34/225 dead transitions. [2023-08-24 14:59:27,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 225 transitions, 1551 flow [2023-08-24 14:59:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 14:59:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 14:59:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2121 transitions. [2023-08-24 14:59:27,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38732651570489407 [2023-08-24 14:59:27,603 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2121 transitions. [2023-08-24 14:59:27,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2121 transitions. [2023-08-24 14:59:27,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:27,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2121 transitions. [2023-08-24 14:59:27,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.32432432432432) internal successors, (2121), 37 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:27,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 148.0) internal successors, (5624), 38 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:27,617 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 148.0) internal successors, (5624), 38 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:27,617 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 174 flow. Second operand 37 states and 2121 transitions. [2023-08-24 14:59:27,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 225 transitions, 1551 flow [2023-08-24 14:59:27,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 225 transitions, 1496 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-08-24 14:59:27,627 INFO L231 Difference]: Finished difference. Result has 92 places, 127 transitions, 1097 flow [2023-08-24 14:59:27,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1097, PETRI_PLACES=92, PETRI_TRANSITIONS=127} [2023-08-24 14:59:27,628 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2023-08-24 14:59:27,628 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 127 transitions, 1097 flow [2023-08-24 14:59:27,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.25) internal successors, (1085), 20 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:27,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:27,629 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:59:27,636 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 14:59:27,832 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,SelfDestructingSolverStorable2 [2023-08-24 14:59:27,833 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 14:59:27,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:27,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1631516584, now seen corresponding path program 2 times [2023-08-24 14:59:27,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:27,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051830835] [2023-08-24 14:59:27,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:27,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:59:28,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:28,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051830835] [2023-08-24 14:59:28,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051830835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:59:28,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:59:28,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 14:59:28,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414732637] [2023-08-24 14:59:28,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:59:28,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:59:28,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:28,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:59:28,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:59:28,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 148 [2023-08-24 14:59:28,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 127 transitions, 1097 flow. Second operand has 5 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 14:59:28,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:28,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 148 [2023-08-24 14:59:28,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:28,242 INFO L124 PetriNetUnfolderBase]: 503/890 cut-off events. [2023-08-24 14:59:28,243 INFO L125 PetriNetUnfolderBase]: For 4815/4815 co-relation queries the response was YES. [2023-08-24 14:59:28,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4378 conditions, 890 events. 503/890 cut-off events. For 4815/4815 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4069 event pairs, 72 based on Foata normal form. 8/898 useless extension candidates. Maximal degree in co-relation 4308. Up to 343 conditions per place. [2023-08-24 14:59:28,252 INFO L140 encePairwiseOnDemand]: 143/148 looper letters, 148 selfloop transitions, 68 changer transitions 0/216 dead transitions. [2023-08-24 14:59:28,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 216 transitions, 2256 flow [2023-08-24 14:59:28,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 14:59:28,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 14:59:28,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 472 transitions. [2023-08-24 14:59:28,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555984555984556 [2023-08-24 14:59:28,254 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 472 transitions. [2023-08-24 14:59:28,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 472 transitions. [2023-08-24 14:59:28,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:28,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 472 transitions. [2023-08-24 14:59:28,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 67.42857142857143) internal successors, (472), 7 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:28,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 148.0) internal successors, (1184), 8 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:28,257 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 148.0) internal successors, (1184), 8 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:28,258 INFO L175 Difference]: Start difference. First operand has 92 places, 127 transitions, 1097 flow. Second operand 7 states and 472 transitions. [2023-08-24 14:59:28,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 216 transitions, 2256 flow [2023-08-24 14:59:28,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 216 transitions, 1915 flow, removed 156 selfloop flow, removed 11 redundant places. [2023-08-24 14:59:28,319 INFO L231 Difference]: Finished difference. Result has 88 places, 164 transitions, 1486 flow [2023-08-24 14:59:28,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1486, PETRI_PLACES=88, PETRI_TRANSITIONS=164} [2023-08-24 14:59:28,321 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 66 predicate places. [2023-08-24 14:59:28,323 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 164 transitions, 1486 flow [2023-08-24 14:59:28,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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 14:59:28,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:28,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:59:28,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 14:59:28,327 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 14:59:28,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:28,328 INFO L85 PathProgramCache]: Analyzing trace with hash 624053438, now seen corresponding path program 3 times [2023-08-24 14:59:28,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:28,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083727838] [2023-08-24 14:59:28,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:28,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:59:28,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:28,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083727838] [2023-08-24 14:59:28,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083727838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:59:28,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:59:28,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 14:59:28,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471308160] [2023-08-24 14:59:28,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:59:28,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:59:28,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:28,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:59:28,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:59:28,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 148 [2023-08-24 14:59:28,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 164 transitions, 1486 flow. Second operand has 5 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 14:59:28,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:28,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 148 [2023-08-24 14:59:28,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:28,711 INFO L124 PetriNetUnfolderBase]: 497/872 cut-off events. [2023-08-24 14:59:28,712 INFO L125 PetriNetUnfolderBase]: For 5287/5287 co-relation queries the response was YES. [2023-08-24 14:59:28,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4234 conditions, 872 events. 497/872 cut-off events. For 5287/5287 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3925 event pairs, 127 based on Foata normal form. 8/874 useless extension candidates. Maximal degree in co-relation 3701. Up to 501 conditions per place. [2023-08-24 14:59:28,720 INFO L140 encePairwiseOnDemand]: 143/148 looper letters, 142 selfloop transitions, 53 changer transitions 0/195 dead transitions. [2023-08-24 14:59:28,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 195 transitions, 2070 flow [2023-08-24 14:59:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:59:28,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:59:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 336 transitions. [2023-08-24 14:59:28,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4540540540540541 [2023-08-24 14:59:28,722 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 336 transitions. [2023-08-24 14:59:28,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 336 transitions. [2023-08-24 14:59:28,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:28,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 336 transitions. [2023-08-24 14:59:28,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.2) internal successors, (336), 5 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:28,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:28,725 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:28,725 INFO L175 Difference]: Start difference. First operand has 88 places, 164 transitions, 1486 flow. Second operand 5 states and 336 transitions. [2023-08-24 14:59:28,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 195 transitions, 2070 flow [2023-08-24 14:59:28,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 195 transitions, 2030 flow, removed 20 selfloop flow, removed 0 redundant places. [2023-08-24 14:59:28,764 INFO L231 Difference]: Finished difference. Result has 94 places, 166 transitions, 1656 flow [2023-08-24 14:59:28,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1656, PETRI_PLACES=94, PETRI_TRANSITIONS=166} [2023-08-24 14:59:28,766 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 72 predicate places. [2023-08-24 14:59:28,767 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 166 transitions, 1656 flow [2023-08-24 14:59:28,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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 14:59:28,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:28,767 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:59:28,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 14:59:28,767 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 14:59:28,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:28,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1966469734, now seen corresponding path program 4 times [2023-08-24 14:59:28,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:28,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430395951] [2023-08-24 14:59:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:28,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:59:28,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:28,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430395951] [2023-08-24 14:59:28,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430395951] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:59:28,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:59:28,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 14:59:28,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975842293] [2023-08-24 14:59:28,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:59:28,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:59:28,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:28,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:59:28,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:59:28,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 148 [2023-08-24 14:59:28,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 166 transitions, 1656 flow. Second operand has 5 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 14:59:28,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:28,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 148 [2023-08-24 14:59:28,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:29,173 INFO L124 PetriNetUnfolderBase]: 495/858 cut-off events. [2023-08-24 14:59:29,173 INFO L125 PetriNetUnfolderBase]: For 5709/5709 co-relation queries the response was YES. [2023-08-24 14:59:29,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4317 conditions, 858 events. 495/858 cut-off events. For 5709/5709 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3792 event pairs, 76 based on Foata normal form. 4/856 useless extension candidates. Maximal degree in co-relation 3851. Up to 343 conditions per place. [2023-08-24 14:59:29,181 INFO L140 encePairwiseOnDemand]: 143/148 looper letters, 135 selfloop transitions, 67 changer transitions 0/202 dead transitions. [2023-08-24 14:59:29,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 202 transitions, 2263 flow [2023-08-24 14:59:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:59:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:59:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 339 transitions. [2023-08-24 14:59:29,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4581081081081081 [2023-08-24 14:59:29,184 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 339 transitions. [2023-08-24 14:59:29,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 339 transitions. [2023-08-24 14:59:29,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:29,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 339 transitions. [2023-08-24 14:59:29,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:29,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:29,186 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:29,186 INFO L175 Difference]: Start difference. First operand has 94 places, 166 transitions, 1656 flow. Second operand 5 states and 339 transitions. [2023-08-24 14:59:29,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 202 transitions, 2263 flow [2023-08-24 14:59:29,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 202 transitions, 2235 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-08-24 14:59:29,245 INFO L231 Difference]: Finished difference. Result has 96 places, 165 transitions, 1745 flow [2023-08-24 14:59:29,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1745, PETRI_PLACES=96, PETRI_TRANSITIONS=165} [2023-08-24 14:59:29,248 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 74 predicate places. [2023-08-24 14:59:29,268 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 165 transitions, 1745 flow [2023-08-24 14:59:29,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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 14:59:29,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:29,269 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:59:29,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 14:59:29,269 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 14:59:29,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:29,269 INFO L85 PathProgramCache]: Analyzing trace with hash -722109947, now seen corresponding path program 1 times [2023-08-24 14:59:29,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:29,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795762271] [2023-08-24 14:59:29,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:29,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:59:30,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:30,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795762271] [2023-08-24 14:59:30,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795762271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:59:30,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767535978] [2023-08-24 14:59:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:30,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:59:30,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:59:30,726 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 14:59:30,729 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 14:59:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:30,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 14:59:30,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:59:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:59:31,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:59:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:59:33,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767535978] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:59:33,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:59:33,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 14:59:33,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785455614] [2023-08-24 14:59:33,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:59:33,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 14:59:33,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:33,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 14:59:33,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2023-08-24 14:59:33,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 148 [2023-08-24 14:59:33,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 165 transitions, 1745 flow. Second operand has 25 states, 25 states have (on average 54.12) internal successors, (1353), 25 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:33,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:33,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 148 [2023-08-24 14:59:33,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:52,096 INFO L124 PetriNetUnfolderBase]: 1243/2184 cut-off events. [2023-08-24 14:59:52,096 INFO L125 PetriNetUnfolderBase]: For 13949/13949 co-relation queries the response was YES. [2023-08-24 14:59:52,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11497 conditions, 2184 events. 1243/2184 cut-off events. For 13949/13949 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12195 event pairs, 0 based on Foata normal form. 10/2188 useless extension candidates. Maximal degree in co-relation 10883. Up to 435 conditions per place. [2023-08-24 14:59:52,118 INFO L140 encePairwiseOnDemand]: 138/148 looper letters, 238 selfloop transitions, 311 changer transitions 92/641 dead transitions. [2023-08-24 14:59:52,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 641 transitions, 7327 flow [2023-08-24 14:59:52,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-24 14:59:52,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-24 14:59:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3594 transitions. [2023-08-24 14:59:52,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38545688545688545 [2023-08-24 14:59:52,129 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3594 transitions. [2023-08-24 14:59:52,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3594 transitions. [2023-08-24 14:59:52,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:52,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3594 transitions. [2023-08-24 14:59:52,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 57.04761904761905) internal successors, (3594), 63 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:52,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 148.0) internal successors, (9472), 64 states have internal predecessors, (9472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:52,154 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 148.0) internal successors, (9472), 64 states have internal predecessors, (9472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:52,154 INFO L175 Difference]: Start difference. First operand has 96 places, 165 transitions, 1745 flow. Second operand 63 states and 3594 transitions. [2023-08-24 14:59:52,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 641 transitions, 7327 flow [2023-08-24 14:59:52,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 641 transitions, 6935 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 14:59:52,239 INFO L231 Difference]: Finished difference. Result has 179 places, 392 transitions, 4964 flow [2023-08-24 14:59:52,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=4964, PETRI_PLACES=179, PETRI_TRANSITIONS=392} [2023-08-24 14:59:52,240 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 157 predicate places. [2023-08-24 14:59:52,240 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 392 transitions, 4964 flow [2023-08-24 14:59:52,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.12) internal successors, (1353), 25 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:52,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:52,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:59:52,249 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 14:59:52,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:59:52,447 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 14:59:52,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:52,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1771081357, now seen corresponding path program 2 times [2023-08-24 14:59:52,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:52,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482700061] [2023-08-24 14:59:52,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:52,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:59:53,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:53,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482700061] [2023-08-24 14:59:53,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482700061] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:59:53,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309386064] [2023-08-24 14:59:53,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 14:59:53,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:59:53,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:59:53,106 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 14:59:53,107 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 14:59:53,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 14:59:53,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:59:53,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 14:59:53,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:59:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:59:53,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:59:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:59:54,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309386064] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:59:54,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:59:54,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-24 14:59:54,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978758623] [2023-08-24 14:59:54,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:59:54,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 14:59:54,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:54,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 14:59:54,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2023-08-24 14:59:54,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-08-24 14:59:54,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 392 transitions, 4964 flow. Second operand has 25 states, 25 states have (on average 56.28) internal successors, (1407), 25 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:54,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:54,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-08-24 14:59:54,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:00,593 INFO L124 PetriNetUnfolderBase]: 1839/3229 cut-off events. [2023-08-24 15:00:00,593 INFO L125 PetriNetUnfolderBase]: For 24471/24471 co-relation queries the response was YES. [2023-08-24 15:00:00,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19022 conditions, 3229 events. 1839/3229 cut-off events. For 24471/24471 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19456 event pairs, 15 based on Foata normal form. 13/3238 useless extension candidates. Maximal degree in co-relation 18902. Up to 812 conditions per place. [2023-08-24 15:00:00,623 INFO L140 encePairwiseOnDemand]: 140/148 looper letters, 298 selfloop transitions, 456 changer transitions 113/867 dead transitions. [2023-08-24 15:00:00,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 867 transitions, 11557 flow [2023-08-24 15:00:00,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-24 15:00:00,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-24 15:00:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3447 transitions. [2023-08-24 15:00:00,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40156104380242313 [2023-08-24 15:00:00,631 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3447 transitions. [2023-08-24 15:00:00,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3447 transitions. [2023-08-24 15:00:00,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:00,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3447 transitions. [2023-08-24 15:00:00,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 59.43103448275862) internal successors, (3447), 58 states have internal predecessors, (3447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:00,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 148.0) internal successors, (8732), 59 states have internal predecessors, (8732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:00,651 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 148.0) internal successors, (8732), 59 states have internal predecessors, (8732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:00,651 INFO L175 Difference]: Start difference. First operand has 179 places, 392 transitions, 4964 flow. Second operand 58 states and 3447 transitions. [2023-08-24 15:00:00,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 867 transitions, 11557 flow [2023-08-24 15:00:00,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 867 transitions, 11327 flow, removed 107 selfloop flow, removed 12 redundant places. [2023-08-24 15:00:00,826 INFO L231 Difference]: Finished difference. Result has 242 places, 607 transitions, 9382 flow [2023-08-24 15:00:00,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=4814, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=9382, PETRI_PLACES=242, PETRI_TRANSITIONS=607} [2023-08-24 15:00:00,828 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 220 predicate places. [2023-08-24 15:00:00,828 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 607 transitions, 9382 flow [2023-08-24 15:00:00,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.28) internal successors, (1407), 25 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:00,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:00,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:00:00,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 15:00:01,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:01,030 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:00:01,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:01,030 INFO L85 PathProgramCache]: Analyzing trace with hash -567010117, now seen corresponding path program 3 times [2023-08-24 15:00:01,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:01,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767316397] [2023-08-24 15:00:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:01,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:00:01,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:01,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767316397] [2023-08-24 15:00:01,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767316397] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:01,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872925283] [2023-08-24 15:00:01,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:00:01,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:01,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:01,174 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:00:01,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 15:00:01,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:00:01,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:00:01,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 15:00:01,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:00:01,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:00:01,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872925283] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:01,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:01,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 10 [2023-08-24 15:00:01,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333948255] [2023-08-24 15:00:01,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:01,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:00:01,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:01,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:00:01,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-24 15:00:01,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 148 [2023-08-24 15:00:01,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 607 transitions, 9382 flow. Second operand has 10 states, 10 states have (on average 61.4) internal successors, (614), 10 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:01,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:01,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 148 [2023-08-24 15:00:01,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:02,622 INFO L124 PetriNetUnfolderBase]: 2351/4022 cut-off events. [2023-08-24 15:00:02,622 INFO L125 PetriNetUnfolderBase]: For 41312/41312 co-relation queries the response was YES. [2023-08-24 15:00:02,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26861 conditions, 4022 events. 2351/4022 cut-off events. For 41312/41312 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 24700 event pairs, 51 based on Foata normal form. 34/4048 useless extension candidates. Maximal degree in co-relation 26701. Up to 842 conditions per place. [2023-08-24 15:00:02,672 INFO L140 encePairwiseOnDemand]: 142/148 looper letters, 330 selfloop transitions, 632 changer transitions 0/962 dead transitions. [2023-08-24 15:00:02,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 962 transitions, 16304 flow [2023-08-24 15:00:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:00:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:00:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 849 transitions. [2023-08-24 15:00:02,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412681912681913 [2023-08-24 15:00:02,675 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 849 transitions. [2023-08-24 15:00:02,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 849 transitions. [2023-08-24 15:00:02,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:02,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 849 transitions. [2023-08-24 15:00:02,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 65.3076923076923) internal successors, (849), 13 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:02,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 148.0) internal successors, (2072), 14 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:02,680 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 148.0) internal successors, (2072), 14 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:02,680 INFO L175 Difference]: Start difference. First operand has 242 places, 607 transitions, 9382 flow. Second operand 13 states and 849 transitions. [2023-08-24 15:00:02,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 962 transitions, 16304 flow [2023-08-24 15:00:03,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 962 transitions, 15883 flow, removed 179 selfloop flow, removed 26 redundant places. [2023-08-24 15:00:03,174 INFO L231 Difference]: Finished difference. Result has 222 places, 837 transitions, 14953 flow [2023-08-24 15:00:03,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=9107, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14953, PETRI_PLACES=222, PETRI_TRANSITIONS=837} [2023-08-24 15:00:03,175 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 200 predicate places. [2023-08-24 15:00:03,176 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 837 transitions, 14953 flow [2023-08-24 15:00:03,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 61.4) internal successors, (614), 10 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:03,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:03,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:00:03,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 15:00:03,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:03,382 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:00:03,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:03,382 INFO L85 PathProgramCache]: Analyzing trace with hash -319686935, now seen corresponding path program 4 times [2023-08-24 15:00:03,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:03,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946115246] [2023-08-24 15:00:03,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:03,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:00:04,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:04,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946115246] [2023-08-24 15:00:04,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946115246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:04,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966475917] [2023-08-24 15:00:04,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:00:04,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:04,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:04,564 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:00:04,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 15:00:04,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:00:04,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:00:04,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 15:00:04,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:00:05,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:00:06,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966475917] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:06,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:06,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-24 15:00:06,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626269752] [2023-08-24 15:00:06,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:06,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 15:00:06,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:06,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 15:00:06,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2023-08-24 15:00:06,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 148 [2023-08-24 15:00:06,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 837 transitions, 14953 flow. Second operand has 27 states, 27 states have (on average 54.111111111111114) internal successors, (1461), 27 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:06,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:06,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 148 [2023-08-24 15:00:06,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:27,862 INFO L124 PetriNetUnfolderBase]: 3077/5345 cut-off events. [2023-08-24 15:00:27,862 INFO L125 PetriNetUnfolderBase]: For 67791/67791 co-relation queries the response was YES. [2023-08-24 15:00:27,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39243 conditions, 5345 events. 3077/5345 cut-off events. For 67791/67791 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35407 event pairs, 18 based on Foata normal form. 15/5350 useless extension candidates. Maximal degree in co-relation 38515. Up to 1977 conditions per place. [2023-08-24 15:00:27,921 INFO L140 encePairwiseOnDemand]: 138/148 looper letters, 462 selfloop transitions, 731 changer transitions 106/1299 dead transitions. [2023-08-24 15:00:27,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1299 transitions, 23674 flow [2023-08-24 15:00:27,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-24 15:00:27,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-24 15:00:27,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3801 transitions. [2023-08-24 15:00:27,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3833198870512303 [2023-08-24 15:00:27,927 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3801 transitions. [2023-08-24 15:00:27,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3801 transitions. [2023-08-24 15:00:27,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:27,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3801 transitions. [2023-08-24 15:00:27,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 56.73134328358209) internal successors, (3801), 67 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:27,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 148.0) internal successors, (10064), 68 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:27,948 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 148.0) internal successors, (10064), 68 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:27,948 INFO L175 Difference]: Start difference. First operand has 222 places, 837 transitions, 14953 flow. Second operand 67 states and 3801 transitions. [2023-08-24 15:00:27,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1299 transitions, 23674 flow [2023-08-24 15:00:28,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1299 transitions, 22880 flow, removed 24 selfloop flow, removed 4 redundant places. [2023-08-24 15:00:28,499 INFO L231 Difference]: Finished difference. Result has 312 places, 1042 transitions, 21007 flow [2023-08-24 15:00:28,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=14361, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=21007, PETRI_PLACES=312, PETRI_TRANSITIONS=1042} [2023-08-24 15:00:28,501 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 290 predicate places. [2023-08-24 15:00:28,501 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 1042 transitions, 21007 flow [2023-08-24 15:00:28,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 54.111111111111114) internal successors, (1461), 27 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:28,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:28,502 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:00:28,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 15:00:28,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:28,708 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:00:28,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1054529367, now seen corresponding path program 5 times [2023-08-24 15:00:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:28,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526135604] [2023-08-24 15:00:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:00:30,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:30,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526135604] [2023-08-24 15:00:30,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526135604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:30,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926449284] [2023-08-24 15:00:30,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:00:30,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:30,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:30,089 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:00:30,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 15:00:30,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:00:30,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:00:30,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 15:00:30,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:00:30,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:00:32,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926449284] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:32,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:32,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-24 15:00:32,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623508695] [2023-08-24 15:00:32,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:32,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 15:00:32,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:32,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 15:00:32,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2023-08-24 15:00:32,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 148 [2023-08-24 15:00:32,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 1042 transitions, 21007 flow. Second operand has 26 states, 26 states have (on average 54.19230769230769) internal successors, (1409), 26 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:32,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:32,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 148 [2023-08-24 15:00:32,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:04,903 INFO L124 PetriNetUnfolderBase]: 3815/6634 cut-off events. [2023-08-24 15:01:04,903 INFO L125 PetriNetUnfolderBase]: For 107596/107596 co-relation queries the response was YES. [2023-08-24 15:01:04,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52929 conditions, 6634 events. 3815/6634 cut-off events. For 107596/107596 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 46000 event pairs, 16 based on Foata normal form. 18/6642 useless extension candidates. Maximal degree in co-relation 52752. Up to 2374 conditions per place. [2023-08-24 15:01:04,978 INFO L140 encePairwiseOnDemand]: 138/148 looper letters, 495 selfloop transitions, 1029 changer transitions 137/1661 dead transitions. [2023-08-24 15:01:04,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1661 transitions, 33858 flow [2023-08-24 15:01:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-08-24 15:01:04,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-08-24 15:01:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 4471 transitions. [2023-08-24 15:01:04,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38239822100581594 [2023-08-24 15:01:04,985 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 4471 transitions. [2023-08-24 15:01:04,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 4471 transitions. [2023-08-24 15:01:04,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:04,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 4471 transitions. [2023-08-24 15:01:04,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 56.59493670886076) internal successors, (4471), 79 states have internal predecessors, (4471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:05,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 148.0) internal successors, (11840), 80 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:05,003 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 148.0) internal successors, (11840), 80 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:05,003 INFO L175 Difference]: Start difference. First operand has 312 places, 1042 transitions, 21007 flow. Second operand 79 states and 4471 transitions. [2023-08-24 15:01:05,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1661 transitions, 33858 flow [2023-08-24 15:01:06,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1661 transitions, 32422 flow, removed 297 selfloop flow, removed 25 redundant places. [2023-08-24 15:01:06,249 INFO L231 Difference]: Finished difference. Result has 385 places, 1353 transitions, 30461 flow [2023-08-24 15:01:06,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=20081, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=737, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=30461, PETRI_PLACES=385, PETRI_TRANSITIONS=1353} [2023-08-24 15:01:06,250 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 363 predicate places. [2023-08-24 15:01:06,250 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 1353 transitions, 30461 flow [2023-08-24 15:01:06,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 54.19230769230769) internal successors, (1409), 26 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:06,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:06,251 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:01:06,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 15:01:06,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:06,451 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:01:06,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:06,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1208967995, now seen corresponding path program 6 times [2023-08-24 15:01:06,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:06,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578142748] [2023-08-24 15:01:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:06,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:01:07,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:07,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578142748] [2023-08-24 15:01:07,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578142748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:07,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070037068] [2023-08-24 15:01:07,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:01:07,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:07,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:07,649 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:01:07,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 15:01:07,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 15:01:07,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:01:07,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 15:01:07,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:01:08,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:01:09,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070037068] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:09,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:09,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-08-24 15:01:09,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727122080] [2023-08-24 15:01:09,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:09,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 15:01:09,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:09,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 15:01:09,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2023-08-24 15:01:09,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 148 [2023-08-24 15:01:09,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 1353 transitions, 30461 flow. Second operand has 31 states, 31 states have (on average 53.83870967741935) internal successors, (1669), 31 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:09,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:09,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 148 [2023-08-24 15:01:09,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:21,914 INFO L124 PetriNetUnfolderBase]: 3977/6905 cut-off events. [2023-08-24 15:01:21,915 INFO L125 PetriNetUnfolderBase]: For 138286/138286 co-relation queries the response was YES. [2023-08-24 15:01:21,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61621 conditions, 6905 events. 3977/6905 cut-off events. For 138286/138286 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 48109 event pairs, 6 based on Foata normal form. 13/6912 useless extension candidates. Maximal degree in co-relation 61371. Up to 2427 conditions per place. [2023-08-24 15:01:22,005 INFO L140 encePairwiseOnDemand]: 138/148 looper letters, 303 selfloop transitions, 1399 changer transitions 89/1791 dead transitions. [2023-08-24 15:01:22,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1791 transitions, 41197 flow [2023-08-24 15:01:22,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-24 15:01:22,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-24 15:01:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3283 transitions. [2023-08-24 15:01:22,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38245573159366264 [2023-08-24 15:01:22,011 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3283 transitions. [2023-08-24 15:01:22,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3283 transitions. [2023-08-24 15:01:22,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:22,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3283 transitions. [2023-08-24 15:01:22,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 56.60344827586207) internal successors, (3283), 58 states have internal predecessors, (3283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:22,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 148.0) internal successors, (8732), 59 states have internal predecessors, (8732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:22,025 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 148.0) internal successors, (8732), 59 states have internal predecessors, (8732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:22,026 INFO L175 Difference]: Start difference. First operand has 385 places, 1353 transitions, 30461 flow. Second operand 58 states and 3283 transitions. [2023-08-24 15:01:22,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1791 transitions, 41197 flow [2023-08-24 15:01:23,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1791 transitions, 40649 flow, removed 233 selfloop flow, removed 17 redundant places. [2023-08-24 15:01:24,007 INFO L231 Difference]: Finished difference. Result has 420 places, 1598 transitions, 40780 flow [2023-08-24 15:01:24,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=30093, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=40780, PETRI_PLACES=420, PETRI_TRANSITIONS=1598} [2023-08-24 15:01:24,009 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 398 predicate places. [2023-08-24 15:01:24,009 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 1598 transitions, 40780 flow [2023-08-24 15:01:24,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 53.83870967741935) internal successors, (1669), 31 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:24,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:24,010 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:01:24,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 15:01:24,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 15:01:24,211 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:01:24,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:24,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1594707129, now seen corresponding path program 7 times [2023-08-24 15:01:24,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:24,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349667665] [2023-08-24 15:01:24,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:24,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:01:25,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:25,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349667665] [2023-08-24 15:01:25,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349667665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:25,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931773040] [2023-08-24 15:01:25,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:01:25,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:25,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:25,261 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:01:25,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 15:01:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:25,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 15:01:25,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:01:26,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:01:27,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931773040] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:27,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:27,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2023-08-24 15:01:27,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964425618] [2023-08-24 15:01:27,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:27,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 15:01:27,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:27,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 15:01:27,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2023-08-24 15:01:27,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 148 [2023-08-24 15:01:27,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 1598 transitions, 40780 flow. Second operand has 30 states, 30 states have (on average 53.766666666666666) internal successors, (1613), 30 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:27,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:27,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 148 [2023-08-24 15:01:27,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:55,363 INFO L124 PetriNetUnfolderBase]: 4695/8116 cut-off events. [2023-08-24 15:01:55,363 INFO L125 PetriNetUnfolderBase]: For 198582/198582 co-relation queries the response was YES. [2023-08-24 15:01:55,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80276 conditions, 8116 events. 4695/8116 cut-off events. For 198582/198582 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 57755 event pairs, 10 based on Foata normal form. 12/8128 useless extension candidates. Maximal degree in co-relation 79988. Up to 1927 conditions per place. [2023-08-24 15:01:55,461 INFO L140 encePairwiseOnDemand]: 137/148 looper letters, 253 selfloop transitions, 1867 changer transitions 84/2204 dead transitions. [2023-08-24 15:01:55,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 2204 transitions, 56492 flow [2023-08-24 15:01:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-08-24 15:01:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-08-24 15:01:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4974 transitions. [2023-08-24 15:01:55,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3819103194103194 [2023-08-24 15:01:55,468 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4974 transitions. [2023-08-24 15:01:55,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4974 transitions. [2023-08-24 15:01:55,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:55,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4974 transitions. [2023-08-24 15:01:55,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 56.52272727272727) internal successors, (4974), 88 states have internal predecessors, (4974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:55,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 148.0) internal successors, (13172), 89 states have internal predecessors, (13172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:55,485 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 148.0) internal successors, (13172), 89 states have internal predecessors, (13172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:55,485 INFO L175 Difference]: Start difference. First operand has 420 places, 1598 transitions, 40780 flow. Second operand 88 states and 4974 transitions. [2023-08-24 15:01:55,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 2204 transitions, 56492 flow [2023-08-24 15:01:58,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 2204 transitions, 55321 flow, removed 220 selfloop flow, removed 20 redundant places. [2023-08-24 15:01:58,296 INFO L231 Difference]: Finished difference. Result has 492 places, 1960 transitions, 53409 flow [2023-08-24 15:01:58,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=40030, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=53409, PETRI_PLACES=492, PETRI_TRANSITIONS=1960} [2023-08-24 15:01:58,298 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 470 predicate places. [2023-08-24 15:01:58,298 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 1960 transitions, 53409 flow [2023-08-24 15:01:58,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 53.766666666666666) internal successors, (1613), 30 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:58,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:58,298 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:01:58,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 15:01:58,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 15:01:58,499 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:01:58,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:58,500 INFO L85 PathProgramCache]: Analyzing trace with hash 808345547, now seen corresponding path program 5 times [2023-08-24 15:01:58,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:58,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250579319] [2023-08-24 15:01:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:58,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:01:59,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:59,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250579319] [2023-08-24 15:01:59,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250579319] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:59,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914741754] [2023-08-24 15:01:59,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:01:59,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:59,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:59,097 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:01:59,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 15:01:59,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 15:01:59,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:01:59,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 15:01:59,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:01:59,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:01:59,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914741754] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:59,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:59,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2023-08-24 15:01:59,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145638400] [2023-08-24 15:01:59,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:59,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 15:01:59,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:59,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 15:01:59,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2023-08-24 15:01:59,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 148 [2023-08-24 15:01:59,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 1960 transitions, 53409 flow. Second operand has 30 states, 30 states have (on average 53.7) internal successors, (1611), 30 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:59,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:59,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 148 [2023-08-24 15:01:59,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:02:10,793 INFO L124 PetriNetUnfolderBase]: 5939/10335 cut-off events. [2023-08-24 15:02:10,794 INFO L125 PetriNetUnfolderBase]: For 263793/263793 co-relation queries the response was YES. [2023-08-24 15:02:10,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107697 conditions, 10335 events. 5939/10335 cut-off events. For 263793/263793 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 77089 event pairs, 60 based on Foata normal form. 19/10354 useless extension candidates. Maximal degree in co-relation 107331. Up to 2374 conditions per place. [2023-08-24 15:02:10,922 INFO L140 encePairwiseOnDemand]: 137/148 looper letters, 377 selfloop transitions, 2315 changer transitions 114/2806 dead transitions. [2023-08-24 15:02:10,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 2806 transitions, 78091 flow [2023-08-24 15:02:10,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-24 15:02:10,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-24 15:02:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4298 transitions. [2023-08-24 15:02:10,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38211237553342814 [2023-08-24 15:02:10,928 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4298 transitions. [2023-08-24 15:02:10,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4298 transitions. [2023-08-24 15:02:10,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:02:10,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4298 transitions. [2023-08-24 15:02:11,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 56.55263157894737) internal successors, (4298), 76 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:11,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 148.0) internal successors, (11396), 77 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:11,071 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 148.0) internal successors, (11396), 77 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:11,071 INFO L175 Difference]: Start difference. First operand has 492 places, 1960 transitions, 53409 flow. Second operand 76 states and 4298 transitions. [2023-08-24 15:02:11,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 2806 transitions, 78091 flow [2023-08-24 15:02:15,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 2806 transitions, 76525 flow, removed 506 selfloop flow, removed 26 redundant places. [2023-08-24 15:02:15,654 INFO L231 Difference]: Finished difference. Result has 561 places, 2561 transitions, 75141 flow [2023-08-24 15:02:15,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=52402, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1960, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1729, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=75141, PETRI_PLACES=561, PETRI_TRANSITIONS=2561} [2023-08-24 15:02:15,657 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 539 predicate places. [2023-08-24 15:02:15,657 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 2561 transitions, 75141 flow [2023-08-24 15:02:15,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 53.7) internal successors, (1611), 30 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:15,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:02:15,657 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:02:15,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 15:02:15,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 15:02:15,863 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:02:15,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:02:15,863 INFO L85 PathProgramCache]: Analyzing trace with hash 488184972, now seen corresponding path program 8 times [2023-08-24 15:02:15,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:02:15,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200732886] [2023-08-24 15:02:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:02:15,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:02:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:02:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:02:17,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:02:17,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200732886] [2023-08-24 15:02:17,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200732886] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:02:17,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225424677] [2023-08-24 15:02:17,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:02:17,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:02:17,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:02:17,285 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:02:17,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 15:02:17,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:02:17,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:02:17,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:02:17,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:02:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:02:18,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:02:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:02:25,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225424677] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:02:25,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:02:25,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-24 15:02:25,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645019814] [2023-08-24 15:02:25,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:02:25,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 15:02:25,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:02:25,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 15:02:25,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2023-08-24 15:02:25,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 148 [2023-08-24 15:02:25,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 2561 transitions, 75141 flow. Second operand has 29 states, 29 states have (on average 54.172413793103445) internal successors, (1571), 29 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:25,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:02:25,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 148 [2023-08-24 15:02:25,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:03:45,926 INFO L124 PetriNetUnfolderBase]: 7075/12358 cut-off events. [2023-08-24 15:03:45,926 INFO L125 PetriNetUnfolderBase]: For 362801/362801 co-relation queries the response was YES. [2023-08-24 15:03:46,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141291 conditions, 12358 events. 7075/12358 cut-off events. For 362801/362801 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 93773 event pairs, 4 based on Foata normal form. 32/12390 useless extension candidates. Maximal degree in co-relation 140971. Up to 4571 conditions per place. [2023-08-24 15:03:46,102 INFO L140 encePairwiseOnDemand]: 138/148 looper letters, 1216 selfloop transitions, 2060 changer transitions 223/3499 dead transitions. [2023-08-24 15:03:46,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 3499 transitions, 103507 flow [2023-08-24 15:03:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-08-24 15:03:46,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-08-24 15:03:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 5277 transitions. [2023-08-24 15:03:46,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3833914559721011 [2023-08-24 15:03:46,107 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 5277 transitions. [2023-08-24 15:03:46,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 5277 transitions. [2023-08-24 15:03:46,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:03:46,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 5277 transitions. [2023-08-24 15:03:46,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 56.74193548387097) internal successors, (5277), 93 states have internal predecessors, (5277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:46,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 148.0) internal successors, (13912), 94 states have internal predecessors, (13912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:46,124 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 148.0) internal successors, (13912), 94 states have internal predecessors, (13912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:46,124 INFO L175 Difference]: Start difference. First operand has 561 places, 2561 transitions, 75141 flow. Second operand 93 states and 5277 transitions. [2023-08-24 15:03:46,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 646 places, 3499 transitions, 103507 flow [2023-08-24 15:03:54,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 3499 transitions, 100084 flow, removed 569 selfloop flow, removed 25 redundant places. [2023-08-24 15:03:54,425 INFO L231 Difference]: Finished difference. Result has 667 places, 3022 transitions, 95128 flow [2023-08-24 15:03:54,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=72702, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=95128, PETRI_PLACES=667, PETRI_TRANSITIONS=3022} [2023-08-24 15:03:54,428 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 645 predicate places. [2023-08-24 15:03:54,428 INFO L495 AbstractCegarLoop]: Abstraction has has 667 places, 3022 transitions, 95128 flow [2023-08-24 15:03:54,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 54.172413793103445) internal successors, (1571), 29 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:54,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:03:54,429 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:03:54,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 15:03:54,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 15:03:54,639 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:03:54,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:03:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1690291124, now seen corresponding path program 9 times [2023-08-24 15:03:54,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:03:54,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771787022] [2023-08-24 15:03:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:03:54,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:03:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:03:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:03:55,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:03:55,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771787022] [2023-08-24 15:03:55,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771787022] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:03:55,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751896561] [2023-08-24 15:03:55,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:03:55,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:03:55,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:03:55,570 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:03:55,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 15:03:55,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:03:55,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:03:55,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 15:03:55,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:03:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:03:56,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:03:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:03:58,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751896561] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:03:58,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:03:58,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-08-24 15:03:58,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95382597] [2023-08-24 15:03:58,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:03:58,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 15:03:58,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:03:58,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 15:03:58,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2023-08-24 15:03:58,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-08-24 15:03:58,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 3022 transitions, 95128 flow. Second operand has 31 states, 31 states have (on average 56.03225806451613) internal successors, (1737), 31 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:58,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:03:58,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-08-24 15:03:58,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:04:35,306 INFO L124 PetriNetUnfolderBase]: 7520/13076 cut-off events. [2023-08-24 15:04:35,306 INFO L125 PetriNetUnfolderBase]: For 453939/453939 co-relation queries the response was YES. [2023-08-24 15:04:35,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157351 conditions, 13076 events. 7520/13076 cut-off events. For 453939/453939 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 100157 event pairs, 11 based on Foata normal form. 23/13099 useless extension candidates. Maximal degree in co-relation 156874. Up to 4879 conditions per place. [2023-08-24 15:04:35,609 INFO L140 encePairwiseOnDemand]: 140/148 looper letters, 1179 selfloop transitions, 2276 changer transitions 139/3594 dead transitions. [2023-08-24 15:04:35,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 3594 transitions, 115554 flow [2023-08-24 15:04:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-24 15:04:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-24 15:04:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3726 transitions. [2023-08-24 15:04:35,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3996138996138996 [2023-08-24 15:04:35,613 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3726 transitions. [2023-08-24 15:04:35,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3726 transitions. [2023-08-24 15:04:35,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:04:35,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3726 transitions. [2023-08-24 15:04:35,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 59.142857142857146) internal successors, (3726), 63 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 15:04:35,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 148.0) internal successors, (9472), 64 states have internal predecessors, (9472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:04:35,624 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 148.0) internal successors, (9472), 64 states have internal predecessors, (9472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:04:35,624 INFO L175 Difference]: Start difference. First operand has 667 places, 3022 transitions, 95128 flow. Second operand 63 states and 3726 transitions. [2023-08-24 15:04:35,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 3594 transitions, 115554 flow [2023-08-24 15:04:44,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 3594 transitions, 114756 flow, removed 382 selfloop flow, removed 26 redundant places. [2023-08-24 15:04:44,902 INFO L231 Difference]: Finished difference. Result has 700 places, 3242 transitions, 111497 flow [2023-08-24 15:04:44,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=94556, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2068, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=878, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=111497, PETRI_PLACES=700, PETRI_TRANSITIONS=3242} [2023-08-24 15:04:44,904 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 678 predicate places. [2023-08-24 15:04:44,904 INFO L495 AbstractCegarLoop]: Abstraction has has 700 places, 3242 transitions, 111497 flow [2023-08-24 15:04:44,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.03225806451613) internal successors, (1737), 31 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:04:44,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:04:44,905 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:04:44,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 15:04:45,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 15:04:45,106 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:04:45,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:04:45,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1527671576, now seen corresponding path program 10 times [2023-08-24 15:04:45,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:04:45,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511779120] [2023-08-24 15:04:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:04:45,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:04:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:04:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:04:46,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:04:46,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511779120] [2023-08-24 15:04:46,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511779120] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:04:46,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717343677] [2023-08-24 15:04:46,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:04:46,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:04:46,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:04:46,018 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:04:46,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 15:04:46,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:04:46,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:04:46,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 15:04:46,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:04:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:04:46,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:04:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:04:48,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717343677] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:04:48,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:04:48,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2023-08-24 15:04:48,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925157154] [2023-08-24 15:04:48,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:04:48,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 15:04:48,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:04:48,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 15:04:48,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2023-08-24 15:04:48,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 148 [2023-08-24 15:04:48,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 3242 transitions, 111497 flow. Second operand has 30 states, 30 states have (on average 53.96666666666667) internal successors, (1619), 30 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:04:48,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:04:48,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 148 [2023-08-24 15:04:48,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:05:57,379 INFO L124 PetriNetUnfolderBase]: 9166/15920 cut-off events. [2023-08-24 15:05:57,380 INFO L125 PetriNetUnfolderBase]: For 693042/693042 co-relation queries the response was YES. [2023-08-24 15:05:57,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203258 conditions, 15920 events. 9166/15920 cut-off events. For 693042/693042 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 125359 event pairs, 13 based on Foata normal form. 23/15943 useless extension candidates. Maximal degree in co-relation 202799. Up to 4028 conditions per place. [2023-08-24 15:05:57,647 INFO L140 encePairwiseOnDemand]: 139/148 looper letters, 817 selfloop transitions, 3468 changer transitions 145/4430 dead transitions. [2023-08-24 15:05:57,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 4430 transitions, 153499 flow [2023-08-24 15:05:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-08-24 15:05:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2023-08-24 15:05:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 6119 transitions. [2023-08-24 15:05:57,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3828203203203203 [2023-08-24 15:05:57,653 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 6119 transitions. [2023-08-24 15:05:57,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 6119 transitions. [2023-08-24 15:05:57,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:05:57,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 6119 transitions. [2023-08-24 15:05:57,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 56.657407407407405) internal successors, (6119), 108 states have internal predecessors, (6119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:05:57,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 148.0) internal successors, (16132), 109 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:05:57,671 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 148.0) internal successors, (16132), 109 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:05:57,671 INFO L175 Difference]: Start difference. First operand has 700 places, 3242 transitions, 111497 flow. Second operand 108 states and 6119 transitions. [2023-08-24 15:05:57,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 4430 transitions, 153499 flow [2023-08-24 15:06:10,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 761 places, 4430 transitions, 152676 flow, removed 211 selfloop flow, removed 30 redundant places. [2023-08-24 15:06:11,007 INFO L231 Difference]: Finished difference. Result has 789 places, 3977 transitions, 147983 flow [2023-08-24 15:06:11,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=110914, PETRI_DIFFERENCE_MINUEND_PLACES=654, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2760, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=147983, PETRI_PLACES=789, PETRI_TRANSITIONS=3977} [2023-08-24 15:06:11,010 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 767 predicate places. [2023-08-24 15:06:11,010 INFO L495 AbstractCegarLoop]: Abstraction has has 789 places, 3977 transitions, 147983 flow [2023-08-24 15:06:11,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 53.96666666666667) internal successors, (1619), 30 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:11,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:11,011 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:11,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 15:06:11,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 15:06:11,215 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:11,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:11,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1153779590, now seen corresponding path program 11 times [2023-08-24 15:06:11,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:11,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907639592] [2023-08-24 15:06:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:11,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:06:12,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:12,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907639592] [2023-08-24 15:06:12,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907639592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:06:12,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645117893] [2023-08-24 15:06:12,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:06:12,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:12,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:06:12,051 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:06:12,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 15:06:12,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:06:12,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:06:12,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 15:06:12,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:06:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:06:13,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:06:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:06:14,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645117893] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:06:14,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:06:14,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2023-08-24 15:06:14,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294244945] [2023-08-24 15:06:14,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:06:14,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 15:06:14,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:14,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 15:06:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2023-08-24 15:06:14,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 148 [2023-08-24 15:06:14,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 789 places, 3977 transitions, 147983 flow. Second operand has 31 states, 31 states have (on average 53.903225806451616) internal successors, (1671), 31 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:14,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:14,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 148 [2023-08-24 15:06:14,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:55,280 INFO L124 PetriNetUnfolderBase]: 9716/16905 cut-off events. [2023-08-24 15:06:55,281 INFO L125 PetriNetUnfolderBase]: For 831286/831286 co-relation queries the response was YES. [2023-08-24 15:06:55,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228406 conditions, 16905 events. 9716/16905 cut-off events. For 831286/831286 co-relation queries the response was YES. Maximal size of possible extension queue 1011. Compared 134391 event pairs, 36 based on Foata normal form. 28/16933 useless extension candidates. Maximal degree in co-relation 227863. Up to 6590 conditions per place. [2023-08-24 15:06:55,603 INFO L140 encePairwiseOnDemand]: 139/148 looper letters, 1350 selfloop transitions, 3090 changer transitions 141/4581 dead transitions. [2023-08-24 15:06:55,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 845 places, 4581 transitions, 172073 flow [2023-08-24 15:06:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-24 15:06:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-24 15:06:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4129 transitions. [2023-08-24 15:06:55,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38748123123123124 [2023-08-24 15:06:55,608 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4129 transitions. [2023-08-24 15:06:55,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4129 transitions. [2023-08-24 15:06:55,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:55,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4129 transitions. [2023-08-24 15:06:55,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 57.34722222222222) internal successors, (4129), 72 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:55,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 148.0) internal successors, (10804), 73 states have internal predecessors, (10804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:55,619 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 148.0) internal successors, (10804), 73 states have internal predecessors, (10804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:55,619 INFO L175 Difference]: Start difference. First operand has 789 places, 3977 transitions, 147983 flow. Second operand 72 states and 4129 transitions. [2023-08-24 15:06:55,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 845 places, 4581 transitions, 172073 flow [2023-08-24 15:07:15,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 812 places, 4581 transitions, 169285 flow, removed 730 selfloop flow, removed 33 redundant places. [2023-08-24 15:07:15,593 INFO L231 Difference]: Finished difference. Result has 833 places, 4205 transitions, 161485 flow [2023-08-24 15:07:15,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=145640, PETRI_DIFFERENCE_MINUEND_PLACES=741, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3977, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2872, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1089, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=161485, PETRI_PLACES=833, PETRI_TRANSITIONS=4205} [2023-08-24 15:07:15,596 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 811 predicate places. [2023-08-24 15:07:15,596 INFO L495 AbstractCegarLoop]: Abstraction has has 833 places, 4205 transitions, 161485 flow [2023-08-24 15:07:15,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 53.903225806451616) internal successors, (1671), 31 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:15,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:07:15,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:07:15,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 15:07:15,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:07:15,797 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:07:15,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:07:15,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1004786846, now seen corresponding path program 12 times [2023-08-24 15:07:15,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:07:15,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255906631] [2023-08-24 15:07:15,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:07:15,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:07:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:07:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:07:17,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:07:17,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255906631] [2023-08-24 15:07:17,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255906631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:07:17,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346700806] [2023-08-24 15:07:17,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:07:17,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:07:17,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:07:17,513 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:07:17,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 15:07:17,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 15:07:17,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:07:17,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 15:07:17,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:07:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:07:18,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:07:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:07:24,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346700806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:07:24,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:07:24,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 29 [2023-08-24 15:07:24,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980037428] [2023-08-24 15:07:24,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:07:24,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 15:07:24,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:07:24,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 15:07:24,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2023-08-24 15:07:24,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 148 [2023-08-24 15:07:24,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 833 places, 4205 transitions, 161485 flow. Second operand has 31 states, 31 states have (on average 53.903225806451616) internal successors, (1671), 31 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:24,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:07:24,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 148 [2023-08-24 15:07:24,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:08:47,654 WARN L234 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 140 DAG size of output: 106 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:09:24,292 WARN L234 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 176 DAG size of output: 104 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:09:33,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 15:10:22,046 INFO L124 PetriNetUnfolderBase]: 12177/21255 cut-off events. [2023-08-24 15:10:22,046 INFO L125 PetriNetUnfolderBase]: For 1116900/1116900 co-relation queries the response was YES. [2023-08-24 15:10:22,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292489 conditions, 21255 events. 12177/21255 cut-off events. For 1116900/1116900 co-relation queries the response was YES. Maximal size of possible extension queue 1301. Compared 175716 event pairs, 88 based on Foata normal form. 57/21312 useless extension candidates. Maximal degree in co-relation 291957. Up to 5513 conditions per place. [2023-08-24 15:10:22,503 INFO L140 encePairwiseOnDemand]: 137/148 looper letters, 1067 selfloop transitions, 4366 changer transitions 320/5753 dead transitions. [2023-08-24 15:10:22,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 946 places, 5753 transitions, 223100 flow [2023-08-24 15:10:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2023-08-24 15:10:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2023-08-24 15:10:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 7133 transitions. [2023-08-24 15:10:22,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37949563736965314 [2023-08-24 15:10:22,509 INFO L72 ComplementDD]: Start complementDD. Operand 127 states and 7133 transitions. [2023-08-24 15:10:22,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 7133 transitions. [2023-08-24 15:10:22,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:10:22,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 127 states and 7133 transitions. [2023-08-24 15:10:22,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 128 states, 127 states have (on average 56.16535433070866) internal successors, (7133), 127 states have internal predecessors, (7133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:10:22,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 128 states, 128 states have (on average 148.0) internal successors, (18944), 128 states have internal predecessors, (18944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:10:22,540 INFO L81 ComplementDD]: Finished complementDD. Result has 128 states, 128 states have (on average 148.0) internal successors, (18944), 128 states have internal predecessors, (18944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:10:22,540 INFO L175 Difference]: Start difference. First operand has 833 places, 4205 transitions, 161485 flow. Second operand 127 states and 7133 transitions. [2023-08-24 15:10:22,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 946 places, 5753 transitions, 223100 flow [2023-08-24 15:10:50,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 918 places, 5753 transitions, 222501 flow, removed 153 selfloop flow, removed 28 redundant places. [2023-08-24 15:10:50,502 INFO L231 Difference]: Finished difference. Result has 984 places, 5238 transitions, 216976 flow [2023-08-24 15:10:50,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=161080, PETRI_DIFFERENCE_MINUEND_PLACES=792, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=127, PETRI_FLOW=216976, PETRI_PLACES=984, PETRI_TRANSITIONS=5238} [2023-08-24 15:10:50,506 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 962 predicate places. [2023-08-24 15:10:50,506 INFO L495 AbstractCegarLoop]: Abstraction has has 984 places, 5238 transitions, 216976 flow [2023-08-24 15:10:50,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 53.903225806451616) internal successors, (1671), 31 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:10:50,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:10:50,506 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:10:50,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 15:10:50,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:10:50,707 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:10:50,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:10:50,707 INFO L85 PathProgramCache]: Analyzing trace with hash 897443102, now seen corresponding path program 13 times [2023-08-24 15:10:50,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:10:50,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262890149] [2023-08-24 15:10:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:10:50,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:10:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:10:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:10:51,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:10:51,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262890149] [2023-08-24 15:10:51,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262890149] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:10:51,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105641043] [2023-08-24 15:10:51,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:10:51,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:10:51,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:10:51,085 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:10:51,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 15:10:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:10:51,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 15:10:51,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:10:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:10:51,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:10:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:10:51,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105641043] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:10:51,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:10:51,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2023-08-24 15:10:51,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114551584] [2023-08-24 15:10:51,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:10:51,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 15:10:51,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:10:51,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 15:10:51,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-08-24 15:10:51,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 148 [2023-08-24 15:10:51,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 984 places, 5238 transitions, 216976 flow. Second operand has 14 states, 14 states have (on average 60.142857142857146) internal successors, (842), 14 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:10:51,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:10:51,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 148 [2023-08-24 15:10:51,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:34,942 INFO L124 PetriNetUnfolderBase]: 13975/24160 cut-off events. [2023-08-24 15:11:34,942 INFO L125 PetriNetUnfolderBase]: For 1527445/1527445 co-relation queries the response was YES. [2023-08-24 15:11:35,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369376 conditions, 24160 events. 13975/24160 cut-off events. For 1527445/1527445 co-relation queries the response was YES. Maximal size of possible extension queue 1373. Compared 197863 event pairs, 9 based on Foata normal form. 84/24244 useless extension candidates. Maximal degree in co-relation 368715. Up to 10187 conditions per place. [2023-08-24 15:11:35,573 INFO L140 encePairwiseOnDemand]: 140/148 looper letters, 2241 selfloop transitions, 4477 changer transitions 0/6718 dead transitions. [2023-08-24 15:11:35,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 987 places, 6718 transitions, 285768 flow [2023-08-24 15:11:35,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 15:11:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 15:11:35,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2136 transitions. [2023-08-24 15:11:35,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43734643734643736 [2023-08-24 15:11:35,580 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2136 transitions. [2023-08-24 15:11:35,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2136 transitions. [2023-08-24 15:11:35,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:35,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2136 transitions. [2023-08-24 15:11:35,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 64.72727272727273) internal successors, (2136), 33 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:35,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 148.0) internal successors, (5032), 34 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:35,586 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 148.0) internal successors, (5032), 34 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:35,586 INFO L175 Difference]: Start difference. First operand has 984 places, 5238 transitions, 216976 flow. Second operand 33 states and 2136 transitions. [2023-08-24 15:11:35,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 987 places, 6718 transitions, 285768 flow [2023-08-24 15:12:27,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 922 places, 6718 transitions, 279042 flow, removed 1307 selfloop flow, removed 65 redundant places. [2023-08-24 15:12:27,620 INFO L231 Difference]: Finished difference. Result has 945 places, 6202 transitions, 274211 flow [2023-08-24 15:12:27,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=212052, PETRI_DIFFERENCE_MINUEND_PLACES=890, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3626, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=274211, PETRI_PLACES=945, PETRI_TRANSITIONS=6202} [2023-08-24 15:12:27,624 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 923 predicate places. [2023-08-24 15:12:27,624 INFO L495 AbstractCegarLoop]: Abstraction has has 945 places, 6202 transitions, 274211 flow [2023-08-24 15:12:27,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.142857142857146) internal successors, (842), 14 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:27,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:27,625 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:27,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:27,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:27,826 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:27,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:27,826 INFO L85 PathProgramCache]: Analyzing trace with hash 131298591, now seen corresponding path program 14 times [2023-08-24 15:12:27,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:27,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922130332] [2023-08-24 15:12:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:27,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:36,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:36,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922130332] [2023-08-24 15:12:36,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922130332] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:36,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736549592] [2023-08-24 15:12:36,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:12:36,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:36,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:36,797 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:12:36,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 15:12:36,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:12:36,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:36,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 15:12:36,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:38,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:49,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736549592] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:49,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:49,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-24 15:12:49,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668068001] [2023-08-24 15:12:49,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:49,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 15:12:49,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:49,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 15:12:49,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=832, Unknown=3, NotChecked=0, Total=992 [2023-08-24 15:12:49,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 148 [2023-08-24 15:12:49,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 945 places, 6202 transitions, 274211 flow. Second operand has 32 states, 32 states have (on average 54.15625) internal successors, (1733), 32 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:49,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:49,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 148 [2023-08-24 15:12:49,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-24 15:12:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 15:12:59,574 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 15:12:59,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:59,581 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 15:12:59,583 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 15:12:59,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:59,775 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateComparison was comparing new predicate (quantifier-free) to 55 known predicates. [2023-08-24 15:12:59,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 15:12:59,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 15:12:59,776 INFO L445 BasicCegarLoop]: Path program histogram: [14, 5, 1, 1] [2023-08-24 15:12:59,779 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 15:12:59,779 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 15:12:59,781 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 03:12:59 BasicIcfg [2023-08-24 15:12:59,781 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 15:12:59,782 INFO L158 Benchmark]: Toolchain (without parser) took 820135.88ms. Allocated memory was 367.0MB in the beginning and 5.7GB in the end (delta: 5.3GB). Free memory was 320.9MB in the beginning and 1.1GB in the end (delta: -776.1MB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. [2023-08-24 15:12:59,782 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 367.0MB. Free memory is still 344.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 15:12:59,782 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.78ms. Allocated memory is still 367.0MB. Free memory was 320.9MB in the beginning and 309.3MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 15:12:59,782 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.62ms. Allocated memory is still 367.0MB. Free memory was 309.3MB in the beginning and 308.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 15:12:59,783 INFO L158 Benchmark]: Boogie Preprocessor took 33.62ms. Allocated memory is still 367.0MB. Free memory was 308.3MB in the beginning and 307.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 15:12:59,783 INFO L158 Benchmark]: RCFGBuilder took 347.35ms. Allocated memory is still 367.0MB. Free memory was 307.2MB in the beginning and 289.4MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-24 15:12:59,783 INFO L158 Benchmark]: TraceAbstraction took 819450.10ms. Allocated memory was 367.0MB in the beginning and 5.7GB in the end (delta: 5.3GB). Free memory was 288.4MB in the beginning and 1.1GB in the end (delta: -808.6MB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. [2023-08-24 15:12:59,784 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 367.0MB. Free memory is still 344.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 256.78ms. Allocated memory is still 367.0MB. Free memory was 320.9MB in the beginning and 309.3MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 41.62ms. Allocated memory is still 367.0MB. Free memory was 309.3MB in the beginning and 308.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.62ms. Allocated memory is still 367.0MB. Free memory was 308.3MB in the beginning and 307.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 347.35ms. Allocated memory is still 367.0MB. Free memory was 307.2MB in the beginning and 289.4MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 819450.10ms. Allocated memory was 367.0MB in the beginning and 5.7GB in the end (delta: 5.3GB). Free memory was 288.4MB in the beginning and 1.1GB in the end (delta: -808.6MB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 74 PlacesBefore, 22 PlacesAfterwards, 73 TransitionsBefore, 17 TransitionsAfterwards, 396 CoEnabledTransitionPairs, 6 FixpointIterations, 40 TrivialSequentialCompositions, 12 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 65 TotalNumberOfCompositions, 617 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 529, independent: 504, independent conditional: 0, independent unconditional: 504, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 218, independent: 213, independent conditional: 0, independent unconditional: 213, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 529, independent: 291, independent conditional: 0, independent unconditional: 291, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 218, unknown conditional: 0, unknown unconditional: 218] , Statistics on independence cache: Total cache size (in pairs): 34, Positive cache size: 30, Positive conditional cache size: 0, Positive unconditional cache size: 30, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 55 known predicates. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 55 known predicates. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 55 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 95 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: 819.3s, OverallIterations: 21, TraceHistogramMax: 4, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 738.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4843 SdHoareTripleChecker+Valid, 72.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4843 mSDsluCounter, 29 SdHoareTripleChecker+Invalid, 68.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 15 mSDsCounter, 1183 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21069 IncrementalHoareTripleChecker+Invalid, 22252 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1183 mSolverCounterUnsat, 14 mSDtfsCounter, 21069 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1683 GetRequests, 376 SyntacticMatches, 24 SemanticMatches, 1282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37773 ImplicationChecksByTransitivity, 427.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=274211occurred in iteration=20, InterpolantAutomatonStates: 1068, 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: 0.2s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 72.5s InterpolantComputationTime, 726 NumberOfCodeBlocks, 726 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 1002 ConstructedInterpolants, 0 QuantifiedInterpolants, 37644 SizeOfPredicates, 160 NumberOfNonLiveVariables, 2244 ConjunctsInSsa, 472 ConjunctsInUnsatCore, 55 InterpolantComputations, 4 PerfectInterpolantSequences, 18/363 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