/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-queue-add-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 16:13:53,927 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 16:13:54,004 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 16:13:54,010 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 16:13:54,010 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 16:13:54,050 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 16:13:54,051 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 16:13:54,051 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 16:13:54,052 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 16:13:54,055 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 16:13:54,056 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 16:13:54,056 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 16:13:54,056 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 16:13:54,057 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 16:13:54,057 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 16:13:54,058 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 16:13:54,058 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 16:13:54,058 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 16:13:54,059 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 16:13:54,059 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 16:13:54,059 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 16:13:54,060 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 16:13:54,060 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 16:13:54,061 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 16:13:54,061 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 16:13:54,061 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 16:13:54,061 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 16:13:54,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 16:13:54,062 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 16:13:54,062 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 16:13:54,063 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 16:13:54,063 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 16:13:54,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 16:13:54,064 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 16:13:54,064 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 16:13:54,064 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 16:13:54,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 16:13:54,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 16:13:54,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 16:13:54,422 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 16:13:54,424 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 16:13:54,425 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-08-24 16:13:55,603 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 16:13:55,851 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 16:13:55,852 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-08-24 16:13:55,861 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cceaa267/86cf14c3598e4786b3d4fd80b7d886d3/FLAGb88089b86 [2023-08-24 16:13:55,878 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cceaa267/86cf14c3598e4786b3d4fd80b7d886d3 [2023-08-24 16:13:55,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 16:13:55,885 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 16:13:55,888 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 16:13:55,889 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 16:13:55,891 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 16:13:55,893 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:13:55" (1/1) ... [2023-08-24 16:13:55,894 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672627fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:13:55, skipping insertion in model container [2023-08-24 16:13:55,894 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:13:55" (1/1) ... [2023-08-24 16:13:55,919 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 16:13:56,101 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-queue-add-2.wvr.c[2696,2709] [2023-08-24 16:13:56,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 16:13:56,120 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 16:13:56,157 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-queue-add-2.wvr.c[2696,2709] [2023-08-24 16:13:56,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 16:13:56,168 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 16:13:56,168 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 16:13:56,180 INFO L206 MainTranslator]: Completed translation [2023-08-24 16:13:56,180 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:13:56 WrapperNode [2023-08-24 16:13:56,181 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 16:13:56,182 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 16:13:56,182 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 16:13:56,182 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 16:13:56,188 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:13:56" (1/1) ... [2023-08-24 16:13:56,202 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:13:56" (1/1) ... [2023-08-24 16:13:56,230 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 160 [2023-08-24 16:13:56,230 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 16:13:56,231 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 16:13:56,231 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 16:13:56,231 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 16:13:56,239 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:13:56" (1/1) ... [2023-08-24 16:13:56,239 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:13:56" (1/1) ... [2023-08-24 16:13:56,254 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:13:56" (1/1) ... [2023-08-24 16:13:56,254 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:13:56" (1/1) ... [2023-08-24 16:13:56,259 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:13:56" (1/1) ... [2023-08-24 16:13:56,262 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:13:56" (1/1) ... [2023-08-24 16:13:56,263 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:13:56" (1/1) ... [2023-08-24 16:13:56,264 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:13:56" (1/1) ... [2023-08-24 16:13:56,276 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 16:13:56,279 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 16:13:56,279 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 16:13:56,279 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 16:13:56,279 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:13:56" (1/1) ... [2023-08-24 16:13:56,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 16:13:56,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:13:56,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 16:13:56,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 16:13:56,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 16:13:56,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 16:13:56,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 16:13:56,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 16:13:56,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 16:13:56,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 16:13:56,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 16:13:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 16:13:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 16:13:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 16:13:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 16:13:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 16:13:56,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 16:13:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 16:13:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 16:13:56,359 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 16:13:56,448 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 16:13:56,450 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 16:13:56,723 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 16:13:56,829 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 16:13:56,830 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 16:13:56,832 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:13:56 BoogieIcfgContainer [2023-08-24 16:13:56,832 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 16:13:56,834 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 16:13:56,834 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 16:13:56,837 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 16:13:56,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 04:13:55" (1/3) ... [2023-08-24 16:13:56,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725963b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:13:56, skipping insertion in model container [2023-08-24 16:13:56,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:13:56" (2/3) ... [2023-08-24 16:13:56,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725963b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:13:56, skipping insertion in model container [2023-08-24 16:13:56,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:13:56" (3/3) ... [2023-08-24 16:13:56,840 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-08-24 16:13:56,855 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 16:13:56,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 16:13:56,856 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 16:13:56,907 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 16:13:56,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 130 transitions, 276 flow [2023-08-24 16:13:56,993 INFO L124 PetriNetUnfolderBase]: 11/128 cut-off events. [2023-08-24 16:13:56,994 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:13:57,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 128 events. 11/128 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 95. Up to 3 conditions per place. [2023-08-24 16:13:57,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 130 transitions, 276 flow [2023-08-24 16:13:57,005 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 120 transitions, 252 flow [2023-08-24 16:13:57,009 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 16:13:57,020 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 120 transitions, 252 flow [2023-08-24 16:13:57,024 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 120 transitions, 252 flow [2023-08-24 16:13:57,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 120 transitions, 252 flow [2023-08-24 16:13:57,079 INFO L124 PetriNetUnfolderBase]: 11/120 cut-off events. [2023-08-24 16:13:57,079 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:13:57,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 120 events. 11/120 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 95. Up to 3 conditions per place. [2023-08-24 16:13:57,082 INFO L119 LiptonReduction]: Number of co-enabled transitions 576 [2023-08-24 16:14:00,967 INFO L134 LiptonReduction]: Checked pairs total: 674 [2023-08-24 16:14:00,967 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-24 16:14:00,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 16:14:00,984 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;@51c2fbcb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 16:14:00,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 16:14:00,989 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 16:14:00,989 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-08-24 16:14:00,989 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:14:00,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:00,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:00,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:00,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:00,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1260607453, now seen corresponding path program 1 times [2023-08-24 16:14:01,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:01,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977672469] [2023-08-24 16:14:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:01,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:01,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:01,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977672469] [2023-08-24 16:14:01,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977672469] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:14:01,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:14:01,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 16:14:01,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802755473] [2023-08-24 16:14:01,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:14:01,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 16:14:01,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:01,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 16:14:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 16:14:01,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 253 [2023-08-24 16:14:01,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:01,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:01,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 253 [2023-08-24 16:14:01,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:01,500 INFO L124 PetriNetUnfolderBase]: 45/87 cut-off events. [2023-08-24 16:14:01,501 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 16:14:01,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 87 events. 45/87 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 207 event pairs, 18 based on Foata normal form. 5/64 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-08-24 16:14:01,502 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 14 selfloop transitions, 2 changer transitions 5/23 dead transitions. [2023-08-24 16:14:01,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 23 transitions, 106 flow [2023-08-24 16:14:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 16:14:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 16:14:01,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 421 transitions. [2023-08-24 16:14:01,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160079051383399 [2023-08-24 16:14:01,517 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 421 transitions. [2023-08-24 16:14:01,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 421 transitions. [2023-08-24 16:14:01,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:01,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 421 transitions. [2023-08-24 16:14:01,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:01,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:01,531 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:01,532 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 4 states and 421 transitions. [2023-08-24 16:14:01,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 23 transitions, 106 flow [2023-08-24 16:14:01,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 16:14:01,536 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 58 flow [2023-08-24 16:14:01,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2023-08-24 16:14:01,541 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-08-24 16:14:01,541 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 58 flow [2023-08-24 16:14:01,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:01,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:01,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:01,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 16:14:01,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:01,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:01,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1875679731, now seen corresponding path program 1 times [2023-08-24 16:14:01,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:01,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363864261] [2023-08-24 16:14:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:01,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:14:01,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:01,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363864261] [2023-08-24 16:14:01,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363864261] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:14:01,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:14:01,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 16:14:01,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911897198] [2023-08-24 16:14:01,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:14:01,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 16:14:01,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:01,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 16:14:01,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 16:14:01,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 253 [2023-08-24 16:14:01,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 58 flow. Second operand has 6 states, 6 states have (on average 104.33333333333333) internal successors, (626), 6 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:01,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:01,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 253 [2023-08-24 16:14:01,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:02,119 INFO L124 PetriNetUnfolderBase]: 72/136 cut-off events. [2023-08-24 16:14:02,120 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-24 16:14:02,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 136 events. 72/136 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 411 event pairs, 15 based on Foata normal form. 1/98 useless extension candidates. Maximal degree in co-relation 350. Up to 77 conditions per place. [2023-08-24 16:14:02,122 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 32 selfloop transitions, 8 changer transitions 2/43 dead transitions. [2023-08-24 16:14:02,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 218 flow [2023-08-24 16:14:02,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 16:14:02,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 16:14:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 654 transitions. [2023-08-24 16:14:02,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4308300395256917 [2023-08-24 16:14:02,130 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 654 transitions. [2023-08-24 16:14:02,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 654 transitions. [2023-08-24 16:14:02,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:02,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 654 transitions. [2023-08-24 16:14:02,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:02,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:02,138 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:02,138 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 58 flow. Second operand 6 states and 654 transitions. [2023-08-24 16:14:02,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 218 flow [2023-08-24 16:14:02,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 214 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 16:14:02,141 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 112 flow [2023-08-24 16:14:02,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-08-24 16:14:02,141 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-08-24 16:14:02,142 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 112 flow [2023-08-24 16:14:02,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.33333333333333) internal successors, (626), 6 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:02,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:02,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:02,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 16:14:02,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:02,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:02,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1908101393, now seen corresponding path program 1 times [2023-08-24 16:14:02,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:02,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528974072] [2023-08-24 16:14:02,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:02,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:02,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:02,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528974072] [2023-08-24 16:14:02,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528974072] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:02,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149304922] [2023-08-24 16:14:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:02,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:02,377 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:02,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 16:14:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:02,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 16:14:02,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:14:02,563 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 16:14:02,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149304922] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:14:02,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 16:14:02,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-08-24 16:14:02,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257472772] [2023-08-24 16:14:02,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:14:02,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 16:14:02,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:02,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 16:14:02,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-24 16:14:02,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 253 [2023-08-24 16:14:02,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:02,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:02,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 253 [2023-08-24 16:14:02,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:02,661 INFO L124 PetriNetUnfolderBase]: 87/181 cut-off events. [2023-08-24 16:14:02,661 INFO L125 PetriNetUnfolderBase]: For 118/120 co-relation queries the response was YES. [2023-08-24 16:14:02,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 181 events. 87/181 cut-off events. For 118/120 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 613 event pairs, 12 based on Foata normal form. 20/173 useless extension candidates. Maximal degree in co-relation 577. Up to 109 conditions per place. [2023-08-24 16:14:02,665 INFO L140 encePairwiseOnDemand]: 248/253 looper letters, 30 selfloop transitions, 9 changer transitions 2/43 dead transitions. [2023-08-24 16:14:02,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 43 transitions, 262 flow [2023-08-24 16:14:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 16:14:02,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 16:14:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 477 transitions. [2023-08-24 16:14:02,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47134387351778656 [2023-08-24 16:14:02,668 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 477 transitions. [2023-08-24 16:14:02,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 477 transitions. [2023-08-24 16:14:02,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:02,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 477 transitions. [2023-08-24 16:14:02,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:02,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:02,672 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:02,672 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 112 flow. Second operand 4 states and 477 transitions. [2023-08-24 16:14:02,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 43 transitions, 262 flow [2023-08-24 16:14:02,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 43 transitions, 249 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-24 16:14:02,676 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 165 flow [2023-08-24 16:14:02,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-24 16:14:02,677 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-08-24 16:14:02,678 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 165 flow [2023-08-24 16:14:02,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:02,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:02,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:02,685 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 16:14:02,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:02,884 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:02,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1875513984, now seen corresponding path program 1 times [2023-08-24 16:14:02,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:02,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514974837] [2023-08-24 16:14:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:02,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:03,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:03,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514974837] [2023-08-24 16:14:03,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514974837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:03,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437166992] [2023-08-24 16:14:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:03,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:03,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:03,069 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:03,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 16:14:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:03,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 16:14:03,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:03,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:14:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:03,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437166992] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:14:03,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:14:03,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-24 16:14:03,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573897390] [2023-08-24 16:14:03,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:14:03,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 16:14:03,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:03,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 16:14:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 16:14:03,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 253 [2023-08-24 16:14:03,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 165 flow. Second operand has 12 states, 12 states have (on average 99.0) internal successors, (1188), 12 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:03,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:03,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 253 [2023-08-24 16:14:03,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:03,420 INFO L124 PetriNetUnfolderBase]: 82/182 cut-off events. [2023-08-24 16:14:03,421 INFO L125 PetriNetUnfolderBase]: For 282/287 co-relation queries the response was YES. [2023-08-24 16:14:03,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 182 events. 82/182 cut-off events. For 282/287 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 608 event pairs, 36 based on Foata normal form. 13/166 useless extension candidates. Maximal degree in co-relation 733. Up to 158 conditions per place. [2023-08-24 16:14:03,422 INFO L140 encePairwiseOnDemand]: 248/253 looper letters, 23 selfloop transitions, 3 changer transitions 11/39 dead transitions. [2023-08-24 16:14:03,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 39 transitions, 290 flow [2023-08-24 16:14:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 16:14:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 16:14:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 612 transitions. [2023-08-24 16:14:03,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4031620553359684 [2023-08-24 16:14:03,425 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 612 transitions. [2023-08-24 16:14:03,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 612 transitions. [2023-08-24 16:14:03,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:03,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 612 transitions. [2023-08-24 16:14:03,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:03,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:03,430 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:03,430 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 165 flow. Second operand 6 states and 612 transitions. [2023-08-24 16:14:03,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 39 transitions, 290 flow [2023-08-24 16:14:03,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 262 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-24 16:14:03,436 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 167 flow [2023-08-24 16:14:03,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=167, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-08-24 16:14:03,438 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-08-24 16:14:03,441 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 167 flow [2023-08-24 16:14:03,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 99.0) internal successors, (1188), 12 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:03,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:03,442 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:03,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 16:14:03,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-24 16:14:03,651 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:03,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:03,651 INFO L85 PathProgramCache]: Analyzing trace with hash -327527854, now seen corresponding path program 2 times [2023-08-24 16:14:03,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:03,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3114451] [2023-08-24 16:14:03,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:03,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:04,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:04,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3114451] [2023-08-24 16:14:04,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3114451] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:04,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180720564] [2023-08-24 16:14:04,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:14:04,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:04,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:04,430 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:04,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 16:14:04,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:14:04,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:14:04,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 16:14:04,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:04,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:14:04,693 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 16:14:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:04,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:14:04,940 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:04,941 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-08-24 16:14:04,947 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-24 16:14:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:05,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180720564] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:14:05,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:14:05,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-24 16:14:05,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452984046] [2023-08-24 16:14:05,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:14:05,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 16:14:05,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 16:14:05,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-08-24 16:14:05,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 253 [2023-08-24 16:14:05,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 167 flow. Second operand has 23 states, 23 states have (on average 82.6086956521739) internal successors, (1900), 23 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:05,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:05,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 253 [2023-08-24 16:14:05,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:06,876 INFO L124 PetriNetUnfolderBase]: 230/471 cut-off events. [2023-08-24 16:14:06,877 INFO L125 PetriNetUnfolderBase]: For 721/729 co-relation queries the response was YES. [2023-08-24 16:14:06,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1844 conditions, 471 events. 230/471 cut-off events. For 721/729 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2097 event pairs, 20 based on Foata normal form. 34/416 useless extension candidates. Maximal degree in co-relation 1818. Up to 194 conditions per place. [2023-08-24 16:14:06,880 INFO L140 encePairwiseOnDemand]: 245/253 looper letters, 97 selfloop transitions, 56 changer transitions 0/155 dead transitions. [2023-08-24 16:14:06,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 155 transitions, 1108 flow [2023-08-24 16:14:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 16:14:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 16:14:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2075 transitions. [2023-08-24 16:14:06,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34173254281949933 [2023-08-24 16:14:06,887 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2075 transitions. [2023-08-24 16:14:06,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2075 transitions. [2023-08-24 16:14:06,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:06,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2075 transitions. [2023-08-24 16:14:06,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 86.45833333333333) internal successors, (2075), 24 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:06,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 253.0) internal successors, (6325), 25 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:06,901 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 253.0) internal successors, (6325), 25 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:06,901 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 167 flow. Second operand 24 states and 2075 transitions. [2023-08-24 16:14:06,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 155 transitions, 1108 flow [2023-08-24 16:14:06,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 155 transitions, 1046 flow, removed 29 selfloop flow, removed 4 redundant places. [2023-08-24 16:14:06,906 INFO L231 Difference]: Finished difference. Result has 64 places, 85 transitions, 777 flow [2023-08-24 16:14:06,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=777, PETRI_PLACES=64, PETRI_TRANSITIONS=85} [2023-08-24 16:14:06,907 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2023-08-24 16:14:06,907 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 85 transitions, 777 flow [2023-08-24 16:14:06,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 82.6086956521739) internal successors, (1900), 23 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:06,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:06,908 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:06,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 16:14:07,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:07,115 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:07,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:07,115 INFO L85 PathProgramCache]: Analyzing trace with hash -405059374, now seen corresponding path program 3 times [2023-08-24 16:14:07,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:07,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239874091] [2023-08-24 16:14:07,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:07,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:07,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:07,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239874091] [2023-08-24 16:14:07,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239874091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:07,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125918740] [2023-08-24 16:14:07,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:14:07,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:07,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:07,798 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:07,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 16:14:07,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 16:14:07,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:14:07,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 16:14:07,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:14:08,033 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 16:14:08,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125918740] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:14:08,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 16:14:08,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2023-08-24 16:14:08,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744221439] [2023-08-24 16:14:08,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:14:08,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 16:14:08,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:08,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 16:14:08,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-08-24 16:14:08,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 253 [2023-08-24 16:14:08,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 85 transitions, 777 flow. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:08,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:08,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 253 [2023-08-24 16:14:08,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:08,154 INFO L124 PetriNetUnfolderBase]: 259/525 cut-off events. [2023-08-24 16:14:08,155 INFO L125 PetriNetUnfolderBase]: For 2372/2376 co-relation queries the response was YES. [2023-08-24 16:14:08,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 525 events. 259/525 cut-off events. For 2372/2376 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2397 event pairs, 25 based on Foata normal form. 12/450 useless extension candidates. Maximal degree in co-relation 2179. Up to 402 conditions per place. [2023-08-24 16:14:08,159 INFO L140 encePairwiseOnDemand]: 248/253 looper letters, 84 selfloop transitions, 13 changer transitions 0/99 dead transitions. [2023-08-24 16:14:08,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 99 transitions, 1071 flow [2023-08-24 16:14:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 16:14:08,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 16:14:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 431 transitions. [2023-08-24 16:14:08,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258893280632411 [2023-08-24 16:14:08,161 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 431 transitions. [2023-08-24 16:14:08,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 431 transitions. [2023-08-24 16:14:08,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:08,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 431 transitions. [2023-08-24 16:14:08,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:08,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:08,164 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:08,164 INFO L175 Difference]: Start difference. First operand has 64 places, 85 transitions, 777 flow. Second operand 4 states and 431 transitions. [2023-08-24 16:14:08,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 99 transitions, 1071 flow [2023-08-24 16:14:08,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 99 transitions, 935 flow, removed 64 selfloop flow, removed 4 redundant places. [2023-08-24 16:14:08,181 INFO L231 Difference]: Finished difference. Result has 63 places, 87 transitions, 718 flow [2023-08-24 16:14:08,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=718, PETRI_PLACES=63, PETRI_TRANSITIONS=87} [2023-08-24 16:14:08,182 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 42 predicate places. [2023-08-24 16:14:08,182 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 87 transitions, 718 flow [2023-08-24 16:14:08,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:08,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:08,182 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:08,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 16:14:08,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:08,388 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:08,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:08,389 INFO L85 PathProgramCache]: Analyzing trace with hash 840996978, now seen corresponding path program 4 times [2023-08-24 16:14:08,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:08,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614498685] [2023-08-24 16:14:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:08,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:09,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:09,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614498685] [2023-08-24 16:14:09,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614498685] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:09,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790641866] [2023-08-24 16:14:09,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:14:09,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:09,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:09,357 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:09,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 16:14:09,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:14:09,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:14:09,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 16:14:09,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:09,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:14:09,566 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 16:14:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:14:09,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:14:09,624 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_200 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2023-08-24 16:14:09,642 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:09,643 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-08-24 16:14:09,647 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-24 16:14:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-08-24 16:14:09,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790641866] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:14:09,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:14:09,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 18 [2023-08-24 16:14:09,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158375801] [2023-08-24 16:14:09,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:14:09,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 16:14:09,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:09,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 16:14:09,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=264, Unknown=1, NotChecked=32, Total=342 [2023-08-24 16:14:09,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 253 [2023-08-24 16:14:09,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 87 transitions, 718 flow. Second operand has 19 states, 19 states have (on average 82.84210526315789) internal successors, (1574), 19 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:09,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:09,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 253 [2023-08-24 16:14:09,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:10,513 INFO L124 PetriNetUnfolderBase]: 279/534 cut-off events. [2023-08-24 16:14:10,513 INFO L125 PetriNetUnfolderBase]: For 2723/2732 co-relation queries the response was YES. [2023-08-24 16:14:10,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 534 events. 279/534 cut-off events. For 2723/2732 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2316 event pairs, 18 based on Foata normal form. 27/493 useless extension candidates. Maximal degree in co-relation 2297. Up to 262 conditions per place. [2023-08-24 16:14:10,518 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 79 selfloop transitions, 35 changer transitions 0/116 dead transitions. [2023-08-24 16:14:10,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 116 transitions, 1157 flow [2023-08-24 16:14:10,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 16:14:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 16:14:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 944 transitions. [2023-08-24 16:14:10,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.339202299676608 [2023-08-24 16:14:10,522 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 944 transitions. [2023-08-24 16:14:10,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 944 transitions. [2023-08-24 16:14:10,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:10,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 944 transitions. [2023-08-24 16:14:10,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 85.81818181818181) internal successors, (944), 11 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:10,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 253.0) internal successors, (3036), 12 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:10,528 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 253.0) internal successors, (3036), 12 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:10,528 INFO L175 Difference]: Start difference. First operand has 63 places, 87 transitions, 718 flow. Second operand 11 states and 944 transitions. [2023-08-24 16:14:10,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 116 transitions, 1157 flow [2023-08-24 16:14:10,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 116 transitions, 1108 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-24 16:14:10,539 INFO L231 Difference]: Finished difference. Result has 70 places, 89 transitions, 828 flow [2023-08-24 16:14:10,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=828, PETRI_PLACES=70, PETRI_TRANSITIONS=89} [2023-08-24 16:14:10,541 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 49 predicate places. [2023-08-24 16:14:10,541 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 89 transitions, 828 flow [2023-08-24 16:14:10,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 82.84210526315789) internal successors, (1574), 19 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:10,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:10,542 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:10,548 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 16:14:10,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:10,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:10,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash 695818798, now seen corresponding path program 1 times [2023-08-24 16:14:10,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:10,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819856642] [2023-08-24 16:14:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:10,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:11,338 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 16:14:11,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:11,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819856642] [2023-08-24 16:14:11,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819856642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:11,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283386806] [2023-08-24 16:14:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:11,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:11,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:11,341 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:11,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 16:14:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:11,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-24 16:14:11,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:11,743 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 16:14:11,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:14:11,834 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:11,835 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 26 [2023-08-24 16:14:12,088 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 16:14:12,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283386806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:14:12,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:14:12,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-08-24 16:14:12,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318534104] [2023-08-24 16:14:12,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:14:12,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 16:14:12,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:12,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 16:14:12,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-08-24 16:14:12,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 253 [2023-08-24 16:14:12,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 89 transitions, 828 flow. Second operand has 26 states, 26 states have (on average 74.88461538461539) internal successors, (1947), 26 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:12,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:12,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 253 [2023-08-24 16:14:12,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:12,948 INFO L124 PetriNetUnfolderBase]: 390/769 cut-off events. [2023-08-24 16:14:12,948 INFO L125 PetriNetUnfolderBase]: For 3954/3954 co-relation queries the response was YES. [2023-08-24 16:14:12,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4232 conditions, 769 events. 390/769 cut-off events. For 3954/3954 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3904 event pairs, 27 based on Foata normal form. 3/692 useless extension candidates. Maximal degree in co-relation 3262. Up to 469 conditions per place. [2023-08-24 16:14:12,956 INFO L140 encePairwiseOnDemand]: 243/253 looper letters, 104 selfloop transitions, 64 changer transitions 4/173 dead transitions. [2023-08-24 16:14:12,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 173 transitions, 1763 flow [2023-08-24 16:14:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 16:14:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 16:14:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1338 transitions. [2023-08-24 16:14:12,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3110904440827714 [2023-08-24 16:14:12,961 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1338 transitions. [2023-08-24 16:14:12,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1338 transitions. [2023-08-24 16:14:12,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:12,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1338 transitions. [2023-08-24 16:14:12,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 78.70588235294117) internal successors, (1338), 17 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:12,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 253.0) internal successors, (4554), 18 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:12,971 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 253.0) internal successors, (4554), 18 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:12,971 INFO L175 Difference]: Start difference. First operand has 70 places, 89 transitions, 828 flow. Second operand 17 states and 1338 transitions. [2023-08-24 16:14:12,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 173 transitions, 1763 flow [2023-08-24 16:14:12,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 173 transitions, 1672 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-24 16:14:12,986 INFO L231 Difference]: Finished difference. Result has 85 places, 125 transitions, 1373 flow [2023-08-24 16:14:12,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1373, PETRI_PLACES=85, PETRI_TRANSITIONS=125} [2023-08-24 16:14:12,987 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 64 predicate places. [2023-08-24 16:14:12,987 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 125 transitions, 1373 flow [2023-08-24 16:14:12,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 74.88461538461539) internal successors, (1947), 26 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:12,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:12,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:12,999 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 16:14:13,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:13,200 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:13,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:13,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1322348962, now seen corresponding path program 2 times [2023-08-24 16:14:13,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:13,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572177335] [2023-08-24 16:14:13,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:13,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:13,794 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 16:14:13,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:13,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572177335] [2023-08-24 16:14:13,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572177335] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:13,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489397315] [2023-08-24 16:14:13,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:14:13,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:13,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:13,796 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:13,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 16:14:13,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:14:13,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:14:13,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-24 16:14:13,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:14,111 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-08-24 16:14:14,175 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 16:14:14,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:14:14,274 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:14,275 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 26 [2023-08-24 16:14:14,514 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 16:14:14,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489397315] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:14:14,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:14:14,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-08-24 16:14:14,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989321615] [2023-08-24 16:14:14,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:14:14,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 16:14:14,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:14,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 16:14:14,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-08-24 16:14:14,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 253 [2023-08-24 16:14:14,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 125 transitions, 1373 flow. Second operand has 26 states, 26 states have (on average 74.84615384615384) internal successors, (1946), 26 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:14,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:14,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 253 [2023-08-24 16:14:14,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:16,102 INFO L124 PetriNetUnfolderBase]: 546/1096 cut-off events. [2023-08-24 16:14:16,102 INFO L125 PetriNetUnfolderBase]: For 7419/7419 co-relation queries the response was YES. [2023-08-24 16:14:16,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6652 conditions, 1096 events. 546/1096 cut-off events. For 7419/7419 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6227 event pairs, 33 based on Foata normal form. 8/1026 useless extension candidates. Maximal degree in co-relation 5799. Up to 480 conditions per place. [2023-08-24 16:14:16,114 INFO L140 encePairwiseOnDemand]: 243/253 looper letters, 139 selfloop transitions, 94 changer transitions 25/259 dead transitions. [2023-08-24 16:14:16,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 259 transitions, 2878 flow [2023-08-24 16:14:16,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 16:14:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 16:14:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2127 transitions. [2023-08-24 16:14:16,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3113746157224418 [2023-08-24 16:14:16,122 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2127 transitions. [2023-08-24 16:14:16,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2127 transitions. [2023-08-24 16:14:16,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:16,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2127 transitions. [2023-08-24 16:14:16,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 78.77777777777777) internal successors, (2127), 27 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:16,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 253.0) internal successors, (7084), 28 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:16,139 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 253.0) internal successors, (7084), 28 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:16,139 INFO L175 Difference]: Start difference. First operand has 85 places, 125 transitions, 1373 flow. Second operand 27 states and 2127 transitions. [2023-08-24 16:14:16,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 259 transitions, 2878 flow [2023-08-24 16:14:16,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 259 transitions, 2741 flow, removed 64 selfloop flow, removed 4 redundant places. [2023-08-24 16:14:16,180 INFO L231 Difference]: Finished difference. Result has 118 places, 161 transitions, 2089 flow [2023-08-24 16:14:16,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2089, PETRI_PLACES=118, PETRI_TRANSITIONS=161} [2023-08-24 16:14:16,181 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 97 predicate places. [2023-08-24 16:14:16,181 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 161 transitions, 2089 flow [2023-08-24 16:14:16,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 74.84615384615384) internal successors, (1946), 26 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:16,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:16,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:16,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 16:14:16,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:16,388 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:16,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:16,388 INFO L85 PathProgramCache]: Analyzing trace with hash 379369504, now seen corresponding path program 3 times [2023-08-24 16:14:16,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:16,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748557424] [2023-08-24 16:14:16,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:16,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:17,196 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 16:14:17,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:17,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748557424] [2023-08-24 16:14:17,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748557424] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:17,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20328570] [2023-08-24 16:14:17,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:14:17,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:17,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:17,198 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:17,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 16:14:17,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 16:14:17,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:14:17,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 16:14:17,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:17,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:14:17,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 16:14:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:14:17,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:14:17,766 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:17,766 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 70 [2023-08-24 16:14:17,774 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2023-08-24 16:14:17,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2023-08-24 16:14:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:14:17,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20328570] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:14:17,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:14:17,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 24 [2023-08-24 16:14:17,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132130185] [2023-08-24 16:14:17,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:14:17,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 16:14:17,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:17,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 16:14:17,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=580, Unknown=1, NotChecked=0, Total=650 [2023-08-24 16:14:17,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 253 [2023-08-24 16:14:17,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 161 transitions, 2089 flow. Second operand has 26 states, 26 states have (on average 70.8076923076923) internal successors, (1841), 26 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:17,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:17,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 253 [2023-08-24 16:14:17,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:18,953 INFO L124 PetriNetUnfolderBase]: 553/1112 cut-off events. [2023-08-24 16:14:18,954 INFO L125 PetriNetUnfolderBase]: For 13614/13614 co-relation queries the response was YES. [2023-08-24 16:14:18,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7690 conditions, 1112 events. 553/1112 cut-off events. For 13614/13614 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6426 event pairs, 43 based on Foata normal form. 2/1101 useless extension candidates. Maximal degree in co-relation 7561. Up to 846 conditions per place. [2023-08-24 16:14:18,967 INFO L140 encePairwiseOnDemand]: 244/253 looper letters, 155 selfloop transitions, 54 changer transitions 5/215 dead transitions. [2023-08-24 16:14:18,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 215 transitions, 2903 flow [2023-08-24 16:14:18,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 16:14:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 16:14:18,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1183 transitions. [2023-08-24 16:14:18,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2922430830039526 [2023-08-24 16:14:18,971 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1183 transitions. [2023-08-24 16:14:18,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1183 transitions. [2023-08-24 16:14:18,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:18,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1183 transitions. [2023-08-24 16:14:18,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 73.9375) internal successors, (1183), 16 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:18,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 253.0) internal successors, (4301), 17 states have internal predecessors, (4301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:18,980 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 253.0) internal successors, (4301), 17 states have internal predecessors, (4301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:18,980 INFO L175 Difference]: Start difference. First operand has 118 places, 161 transitions, 2089 flow. Second operand 16 states and 1183 transitions. [2023-08-24 16:14:18,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 215 transitions, 2903 flow [2023-08-24 16:14:19,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 215 transitions, 2745 flow, removed 54 selfloop flow, removed 13 redundant places. [2023-08-24 16:14:19,046 INFO L231 Difference]: Finished difference. Result has 124 places, 175 transitions, 2329 flow [2023-08-24 16:14:19,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2329, PETRI_PLACES=124, PETRI_TRANSITIONS=175} [2023-08-24 16:14:19,047 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 103 predicate places. [2023-08-24 16:14:19,047 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 175 transitions, 2329 flow [2023-08-24 16:14:19,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 70.8076923076923) internal successors, (1841), 26 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:19,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:19,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:19,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 16:14:19,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-24 16:14:19,266 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:19,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:19,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1447899934, now seen corresponding path program 4 times [2023-08-24 16:14:19,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:19,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088482543] [2023-08-24 16:14:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:19,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:20,068 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 16:14:20,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:20,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088482543] [2023-08-24 16:14:20,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088482543] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:20,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155282617] [2023-08-24 16:14:20,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:14:20,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:20,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:20,070 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:20,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 16:14:20,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:14:20,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:14:20,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-24 16:14:20,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:20,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:14:20,407 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 16:14:20,511 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 16:14:20,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:14:20,599 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_338 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_338) c_~q~0.base) .cse1))) (or (<= c_~N~0 (+ c_~s~0 .cse0)) (= .cse0 0)))) (forall ((v_ArrVal_338 (Array Int Int))) (let ((.cse2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_338) c_~q~0.base) .cse1))) (or (< (+ c_~s~0 .cse2) (+ c_~N~0 1)) (= .cse2 0)))))) is different from false [2023-08-24 16:14:20,623 WARN L839 $PredicateComparison]: unable to prove that (or (< c_~q_back~0 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (<= c_~n~0 c_~q_back~0) (let ((.cse1 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_338 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_338) c_~q~0.base) .cse1))) (or (<= c_~N~0 (+ c_~s~0 .cse0)) (= .cse0 0)))) (forall ((v_ArrVal_338 (Array Int Int))) (let ((.cse2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_338) c_~q~0.base) .cse1))) (or (< (+ c_~s~0 .cse2) (+ c_~N~0 1)) (= .cse2 0))))))) is different from false [2023-08-24 16:14:20,656 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:20,657 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 112 [2023-08-24 16:14:20,666 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 87 [2023-08-24 16:14:20,671 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 75 [2023-08-24 16:14:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 16:14:20,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155282617] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:14:20,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:14:20,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-24 16:14:20,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39988627] [2023-08-24 16:14:20,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:14:20,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 16:14:20,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:20,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 16:14:20,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=566, Unknown=2, NotChecked=98, Total=756 [2023-08-24 16:14:20,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 253 [2023-08-24 16:14:20,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 175 transitions, 2329 flow. Second operand has 28 states, 28 states have (on average 67.71428571428571) internal successors, (1896), 28 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:20,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:20,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 253 [2023-08-24 16:14:20,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:24,902 INFO L124 PetriNetUnfolderBase]: 652/1317 cut-off events. [2023-08-24 16:14:24,903 INFO L125 PetriNetUnfolderBase]: For 17678/17678 co-relation queries the response was YES. [2023-08-24 16:14:24,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9378 conditions, 1317 events. 652/1317 cut-off events. For 17678/17678 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7966 event pairs, 55 based on Foata normal form. 5/1312 useless extension candidates. Maximal degree in co-relation 9067. Up to 791 conditions per place. [2023-08-24 16:14:24,919 INFO L140 encePairwiseOnDemand]: 240/253 looper letters, 157 selfloop transitions, 102 changer transitions 8/268 dead transitions. [2023-08-24 16:14:24,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 268 transitions, 3720 flow [2023-08-24 16:14:24,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 16:14:24,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 16:14:24,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1707 transitions. [2023-08-24 16:14:24,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2811264822134387 [2023-08-24 16:14:24,925 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1707 transitions. [2023-08-24 16:14:24,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1707 transitions. [2023-08-24 16:14:24,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:24,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1707 transitions. [2023-08-24 16:14:24,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 71.125) internal successors, (1707), 24 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:24,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 253.0) internal successors, (6325), 25 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:24,937 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 253.0) internal successors, (6325), 25 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:24,937 INFO L175 Difference]: Start difference. First operand has 124 places, 175 transitions, 2329 flow. Second operand 24 states and 1707 transitions. [2023-08-24 16:14:24,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 268 transitions, 3720 flow [2023-08-24 16:14:25,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 268 transitions, 3652 flow, removed 20 selfloop flow, removed 8 redundant places. [2023-08-24 16:14:25,015 INFO L231 Difference]: Finished difference. Result has 148 places, 209 transitions, 3159 flow [2023-08-24 16:14:25,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3159, PETRI_PLACES=148, PETRI_TRANSITIONS=209} [2023-08-24 16:14:25,016 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2023-08-24 16:14:25,017 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 209 transitions, 3159 flow [2023-08-24 16:14:25,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 67.71428571428571) internal successors, (1896), 28 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:25,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:25,018 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:25,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 16:14:25,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:25,223 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:25,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:25,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1641144258, now seen corresponding path program 5 times [2023-08-24 16:14:25,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:25,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034300484] [2023-08-24 16:14:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:25,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:25,924 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 16:14:25,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:25,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034300484] [2023-08-24 16:14:25,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034300484] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:25,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864775456] [2023-08-24 16:14:25,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:14:25,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:25,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:25,926 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:25,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 16:14:26,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:14:26,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:14:26,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 16:14:26,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:26,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 16:14:26,170 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 16:14:26,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:14:26,311 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 16:14:26,428 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-08-24 16:14:26,532 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 16:14:26,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:14:26,703 WARN L839 $PredicateComparison]: unable to prove that (or (< c_~q_back~0 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (<= c_~n~0 c_~q_back~0) (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_376 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) c_~q~0.base) .cse0)))) (forall ((v_ArrVal_376 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) c_~q~0.base) .cse0)) (+ c_~N~0 1)))))) is different from false [2023-08-24 16:14:26,887 WARN L839 $PredicateComparison]: unable to prove that (or (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~q_back~0 0) (let ((.cse1 (+ (* 4 c_~q_back~0) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ (* c_~q_front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_375 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_375))) (or (not (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1)) (forall ((v_ArrVal_376 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2))))))) (forall ((v_ArrVal_375 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_375))) (or (not (= (select (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1)) (forall ((v_ArrVal_376 (Array Int Int))) (< (+ c_~s~0 (select (select (store .cse3 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)) 2))))))) (<= c_~n~0 (+ c_~q_back~0 1))) is different from false [2023-08-24 16:14:26,907 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:26,908 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2023-08-24 16:14:26,918 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:26,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 178 [2023-08-24 16:14:26,931 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:26,932 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 52 [2023-08-24 16:14:26,937 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-08-24 16:14:27,000 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:27,001 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2023-08-24 16:14:27,005 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:14:27,012 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 16:14:27,012 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 54 [2023-08-24 16:14:27,023 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 16:14:27,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-08-24 16:14:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-24 16:14:27,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864775456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:14:27,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:14:27,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-08-24 16:14:27,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207817806] [2023-08-24 16:14:27,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:14:27,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 16:14:27,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:27,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 16:14:27,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=602, Unknown=4, NotChecked=102, Total=812 [2023-08-24 16:14:27,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 253 [2023-08-24 16:14:27,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 209 transitions, 3159 flow. Second operand has 29 states, 29 states have (on average 67.65517241379311) internal successors, (1962), 29 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:27,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:27,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 253 [2023-08-24 16:14:27,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:27,630 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (< c_~q_back~0 0)) (.cse1 (<= c_~n~0 (+ c_~q_back~0 1)))) (and (or (and (= c_~q_front~0 c_~q_back~0) (< c_~s~0 1) (< 0 (+ c_~s~0 1)) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) .cse0 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse1) (or (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse0 (let ((.cse3 (+ (* 4 c_~q_back~0) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse4 (+ (* c_~q_front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_375 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_375))) (or (not (= (select (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse3) 1)) (forall ((v_ArrVal_376 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store .cse2 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse4))))))) (forall ((v_ArrVal_375 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_375))) (or (not (= (select (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse3) 1)) (forall ((v_ArrVal_376 (Array Int Int))) (< (+ c_~s~0 (select (select (store .cse5 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse4)) 2))))))) .cse1))) is different from false [2023-08-24 16:14:28,380 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* c_~q_front~0 4) c_~q~0.offset)) (.cse0 (< c_~q_back~0 0))) (and (or .cse0 (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (<= c_~n~0 c_~q_back~0) (and (forall ((v_ArrVal_376 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) c_~q~0.base) .cse1)))) (forall ((v_ArrVal_376 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) c_~q~0.base) .cse1)) (+ c_~N~0 1))))) (or (and (forall ((v_ArrVal_376 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) c_~q~0.base) .cse1)) 2)) (forall ((v_ArrVal_376 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) c_~q~0.base) .cse1))))) (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) .cse0 (<= c_~n~0 (+ c_~q_back~0 1))))) is different from false [2023-08-24 16:14:34,940 INFO L124 PetriNetUnfolderBase]: 929/1840 cut-off events. [2023-08-24 16:14:34,940 INFO L125 PetriNetUnfolderBase]: For 33040/33040 co-relation queries the response was YES. [2023-08-24 16:14:34,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15195 conditions, 1840 events. 929/1840 cut-off events. For 33040/33040 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11744 event pairs, 81 based on Foata normal form. 10/1844 useless extension candidates. Maximal degree in co-relation 14742. Up to 873 conditions per place. [2023-08-24 16:14:34,959 INFO L140 encePairwiseOnDemand]: 241/253 looper letters, 197 selfloop transitions, 209 changer transitions 29/436 dead transitions. [2023-08-24 16:14:34,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 436 transitions, 7050 flow [2023-08-24 16:14:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 16:14:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 16:14:34,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2794 transitions. [2023-08-24 16:14:34,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2831661092530658 [2023-08-24 16:14:34,964 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2794 transitions. [2023-08-24 16:14:34,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2794 transitions. [2023-08-24 16:14:34,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:34,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2794 transitions. [2023-08-24 16:14:34,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 71.64102564102564) internal successors, (2794), 39 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:34,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 253.0) internal successors, (10120), 40 states have internal predecessors, (10120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:34,980 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 253.0) internal successors, (10120), 40 states have internal predecessors, (10120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:34,980 INFO L175 Difference]: Start difference. First operand has 148 places, 209 transitions, 3159 flow. Second operand 39 states and 2794 transitions. [2023-08-24 16:14:34,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 436 transitions, 7050 flow [2023-08-24 16:14:35,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 436 transitions, 6819 flow, removed 92 selfloop flow, removed 13 redundant places. [2023-08-24 16:14:35,087 INFO L231 Difference]: Finished difference. Result has 193 places, 330 transitions, 5927 flow [2023-08-24 16:14:35,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=5927, PETRI_PLACES=193, PETRI_TRANSITIONS=330} [2023-08-24 16:14:35,088 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 172 predicate places. [2023-08-24 16:14:35,088 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 330 transitions, 5927 flow [2023-08-24 16:14:35,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 67.65517241379311) internal successors, (1962), 29 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:35,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:35,089 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 16:14:35,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 16:14:35,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 16:14:35,289 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:35,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:35,290 INFO L85 PathProgramCache]: Analyzing trace with hash -816092854, now seen corresponding path program 6 times [2023-08-24 16:14:35,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:35,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306314537] [2023-08-24 16:14:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:35,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:35,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:35,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306314537] [2023-08-24 16:14:35,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306314537] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:35,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705008988] [2023-08-24 16:14:35,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:14:35,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:35,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:35,512 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:35,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 16:14:35,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 16:14:35,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:14:35,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 16:14:35,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:14:35,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:14:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:14:35,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705008988] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:14:35,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:14:35,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 6] total 16 [2023-08-24 16:14:35,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451044342] [2023-08-24 16:14:35,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:14:35,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:14:35,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:35,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:14:35,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:14:35,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 253 [2023-08-24 16:14:35,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 330 transitions, 5927 flow. Second operand has 17 states, 17 states have (on average 97.6470588235294) internal successors, (1660), 17 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:35,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:35,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 253 [2023-08-24 16:14:35,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:36,383 INFO L124 PetriNetUnfolderBase]: 784/1657 cut-off events. [2023-08-24 16:14:36,383 INFO L125 PetriNetUnfolderBase]: For 40521/40527 co-relation queries the response was YES. [2023-08-24 16:14:36,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14947 conditions, 1657 events. 784/1657 cut-off events. For 40521/40527 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 11092 event pairs, 20 based on Foata normal form. 248/1890 useless extension candidates. Maximal degree in co-relation 14638. Up to 539 conditions per place. [2023-08-24 16:14:36,402 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 137 selfloop transitions, 94 changer transitions 140/377 dead transitions. [2023-08-24 16:14:36,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 377 transitions, 7129 flow [2023-08-24 16:14:36,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 16:14:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 16:14:36,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1419 transitions. [2023-08-24 16:14:36,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40062111801242234 [2023-08-24 16:14:36,405 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1419 transitions. [2023-08-24 16:14:36,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1419 transitions. [2023-08-24 16:14:36,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:36,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1419 transitions. [2023-08-24 16:14:36,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 101.35714285714286) internal successors, (1419), 14 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:36,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 253.0) internal successors, (3795), 15 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:36,411 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 253.0) internal successors, (3795), 15 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:36,411 INFO L175 Difference]: Start difference. First operand has 193 places, 330 transitions, 5927 flow. Second operand 14 states and 1419 transitions. [2023-08-24 16:14:36,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 377 transitions, 7129 flow [2023-08-24 16:14:36,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 377 transitions, 6253 flow, removed 398 selfloop flow, removed 17 redundant places. [2023-08-24 16:14:36,546 INFO L231 Difference]: Finished difference. Result has 190 places, 189 transitions, 3135 flow [2023-08-24 16:14:36,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=4345, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3135, PETRI_PLACES=190, PETRI_TRANSITIONS=189} [2023-08-24 16:14:36,547 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 169 predicate places. [2023-08-24 16:14:36,547 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 189 transitions, 3135 flow [2023-08-24 16:14:36,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 97.6470588235294) internal successors, (1660), 17 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:36,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:36,548 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:36,557 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 16:14:36,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 16:14:36,753 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:36,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:36,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1050669399, now seen corresponding path program 7 times [2023-08-24 16:14:36,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:36,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597243641] [2023-08-24 16:14:36,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:36,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:37,330 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 16:14:37,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:37,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597243641] [2023-08-24 16:14:37,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597243641] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:37,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405250689] [2023-08-24 16:14:37,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:14:37,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:37,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:37,333 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:37,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 16:14:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:37,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 16:14:37,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:14:37,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:14:37,637 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-24 16:14:37,637 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-24 16:14:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:14:37,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405250689] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:14:37,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:14:37,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 18 [2023-08-24 16:14:37,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797024559] [2023-08-24 16:14:37,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:14:37,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 16:14:37,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:37,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 16:14:37,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-08-24 16:14:37,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 253 [2023-08-24 16:14:37,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 189 transitions, 3135 flow. Second operand has 19 states, 19 states have (on average 87.05263157894737) internal successors, (1654), 19 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:37,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:37,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 253 [2023-08-24 16:14:37,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:39,024 INFO L124 PetriNetUnfolderBase]: 676/1395 cut-off events. [2023-08-24 16:14:39,024 INFO L125 PetriNetUnfolderBase]: For 46376/46380 co-relation queries the response was YES. [2023-08-24 16:14:39,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14478 conditions, 1395 events. 676/1395 cut-off events. For 46376/46380 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8468 event pairs, 32 based on Foata normal form. 140/1521 useless extension candidates. Maximal degree in co-relation 14319. Up to 585 conditions per place. [2023-08-24 16:14:39,038 INFO L140 encePairwiseOnDemand]: 245/253 looper letters, 183 selfloop transitions, 139 changer transitions 61/389 dead transitions. [2023-08-24 16:14:39,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 389 transitions, 7400 flow [2023-08-24 16:14:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 16:14:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 16:14:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2662 transitions. [2023-08-24 16:14:39,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36281859070464767 [2023-08-24 16:14:39,042 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2662 transitions. [2023-08-24 16:14:39,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2662 transitions. [2023-08-24 16:14:39,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:39,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2662 transitions. [2023-08-24 16:14:39,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 91.79310344827586) internal successors, (2662), 29 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:39,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 253.0) internal successors, (7590), 30 states have internal predecessors, (7590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:39,053 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 253.0) internal successors, (7590), 30 states have internal predecessors, (7590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:39,053 INFO L175 Difference]: Start difference. First operand has 190 places, 189 transitions, 3135 flow. Second operand 29 states and 2662 transitions. [2023-08-24 16:14:39,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 389 transitions, 7400 flow [2023-08-24 16:14:39,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 389 transitions, 5710 flow, removed 763 selfloop flow, removed 33 redundant places. [2023-08-24 16:14:39,150 INFO L231 Difference]: Finished difference. Result has 170 places, 213 transitions, 3578 flow [2023-08-24 16:14:39,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3578, PETRI_PLACES=170, PETRI_TRANSITIONS=213} [2023-08-24 16:14:39,150 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 149 predicate places. [2023-08-24 16:14:39,151 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 213 transitions, 3578 flow [2023-08-24 16:14:39,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 87.05263157894737) internal successors, (1654), 19 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:39,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:39,151 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:39,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 16:14:39,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 16:14:39,357 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:39,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:39,357 INFO L85 PathProgramCache]: Analyzing trace with hash -423146770, now seen corresponding path program 8 times [2023-08-24 16:14:39,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:39,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910000444] [2023-08-24 16:14:39,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:39,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 16:14:39,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:39,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910000444] [2023-08-24 16:14:39,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910000444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:39,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910270203] [2023-08-24 16:14:39,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:14:39,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:39,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:39,491 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:39,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 16:14:39,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:14:39,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:14:39,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 16:14:39,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:14:39,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:14:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:14:39,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910270203] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:14:39,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:14:39,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 16:14:39,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347015030] [2023-08-24 16:14:39,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:14:39,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:14:39,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:39,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:14:39,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:14:39,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 253 [2023-08-24 16:14:39,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 213 transitions, 3578 flow. Second operand has 18 states, 18 states have (on average 99.38888888888889) internal successors, (1789), 18 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:39,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:39,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 253 [2023-08-24 16:14:39,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:40,015 INFO L124 PetriNetUnfolderBase]: 488/944 cut-off events. [2023-08-24 16:14:40,015 INFO L125 PetriNetUnfolderBase]: For 21399/21408 co-relation queries the response was YES. [2023-08-24 16:14:40,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8944 conditions, 944 events. 488/944 cut-off events. For 21399/21408 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4810 event pairs, 156 based on Foata normal form. 12/954 useless extension candidates. Maximal degree in co-relation 8885. Up to 902 conditions per place. [2023-08-24 16:14:40,024 INFO L140 encePairwiseOnDemand]: 249/253 looper letters, 157 selfloop transitions, 4 changer transitions 10/176 dead transitions. [2023-08-24 16:14:40,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 176 transitions, 3282 flow [2023-08-24 16:14:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 16:14:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 16:14:40,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 804 transitions. [2023-08-24 16:14:40,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39723320158102765 [2023-08-24 16:14:40,029 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 804 transitions. [2023-08-24 16:14:40,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 804 transitions. [2023-08-24 16:14:40,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:40,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 804 transitions. [2023-08-24 16:14:40,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 100.5) internal successors, (804), 8 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:40,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 253.0) internal successors, (2277), 9 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:40,033 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 253.0) internal successors, (2277), 9 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:40,033 INFO L175 Difference]: Start difference. First operand has 170 places, 213 transitions, 3578 flow. Second operand 8 states and 804 transitions. [2023-08-24 16:14:40,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 176 transitions, 3282 flow [2023-08-24 16:14:40,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 176 transitions, 2564 flow, removed 276 selfloop flow, removed 24 redundant places. [2023-08-24 16:14:40,100 INFO L231 Difference]: Finished difference. Result has 138 places, 166 transitions, 2165 flow [2023-08-24 16:14:40,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2165, PETRI_PLACES=138, PETRI_TRANSITIONS=166} [2023-08-24 16:14:40,100 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 117 predicate places. [2023-08-24 16:14:40,100 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 166 transitions, 2165 flow [2023-08-24 16:14:40,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.38888888888889) internal successors, (1789), 18 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:40,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:40,101 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:40,108 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 16:14:40,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 16:14:40,306 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:40,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:40,307 INFO L85 PathProgramCache]: Analyzing trace with hash 156660135, now seen corresponding path program 9 times [2023-08-24 16:14:40,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:40,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487714843] [2023-08-24 16:14:40,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:40,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:40,789 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 16:14:40,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:40,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487714843] [2023-08-24 16:14:40,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487714843] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:40,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770261868] [2023-08-24 16:14:40,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:14:40,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:40,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:40,791 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:40,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 16:14:40,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 16:14:40,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:14:40,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 16:14:40,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:41,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:14:41,054 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-24 16:14:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:14:41,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:14:41,189 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:41,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2023-08-24 16:14:41,194 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-24 16:14:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:14:41,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770261868] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:14:41,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:14:41,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2023-08-24 16:14:41,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985230911] [2023-08-24 16:14:41,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:14:41,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 16:14:41,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:41,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 16:14:41,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=479, Unknown=6, NotChecked=0, Total=552 [2023-08-24 16:14:41,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 253 [2023-08-24 16:14:41,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 166 transitions, 2165 flow. Second operand has 24 states, 24 states have (on average 82.83333333333333) internal successors, (1988), 24 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:41,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:41,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 253 [2023-08-24 16:14:41,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:42,623 INFO L124 PetriNetUnfolderBase]: 617/1170 cut-off events. [2023-08-24 16:14:42,624 INFO L125 PetriNetUnfolderBase]: For 18258/18264 co-relation queries the response was YES. [2023-08-24 16:14:42,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8857 conditions, 1170 events. 617/1170 cut-off events. For 18258/18264 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6095 event pairs, 14 based on Foata normal form. 62/1223 useless extension candidates. Maximal degree in co-relation 8809. Up to 437 conditions per place. [2023-08-24 16:14:42,632 INFO L140 encePairwiseOnDemand]: 245/253 looper letters, 137 selfloop transitions, 151 changer transitions 1/294 dead transitions. [2023-08-24 16:14:42,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 294 transitions, 4131 flow [2023-08-24 16:14:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 16:14:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 16:14:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2259 transitions. [2023-08-24 16:14:42,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34341745211310426 [2023-08-24 16:14:42,636 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2259 transitions. [2023-08-24 16:14:42,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2259 transitions. [2023-08-24 16:14:42,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:42,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2259 transitions. [2023-08-24 16:14:42,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 86.88461538461539) internal successors, (2259), 26 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:42,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 253.0) internal successors, (6831), 27 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:42,651 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 253.0) internal successors, (6831), 27 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:42,651 INFO L175 Difference]: Start difference. First operand has 138 places, 166 transitions, 2165 flow. Second operand 26 states and 2259 transitions. [2023-08-24 16:14:42,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 294 transitions, 4131 flow [2023-08-24 16:14:42,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 294 transitions, 4082 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-08-24 16:14:42,705 INFO L231 Difference]: Finished difference. Result has 153 places, 205 transitions, 3304 flow [2023-08-24 16:14:42,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3304, PETRI_PLACES=153, PETRI_TRANSITIONS=205} [2023-08-24 16:14:42,706 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 132 predicate places. [2023-08-24 16:14:42,706 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 205 transitions, 3304 flow [2023-08-24 16:14:42,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 82.83333333333333) internal successors, (1988), 24 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:42,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:42,707 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:42,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 16:14:42,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:42,912 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:42,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:42,913 INFO L85 PathProgramCache]: Analyzing trace with hash -745250499, now seen corresponding path program 10 times [2023-08-24 16:14:42,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:42,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156049012] [2023-08-24 16:14:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:42,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:43,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:43,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156049012] [2023-08-24 16:14:43,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156049012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:43,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735646342] [2023-08-24 16:14:43,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:14:43,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:43,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:43,699 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:43,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 16:14:43,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:14:43,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:14:43,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 16:14:43,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:44,291 INFO L322 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-24 16:14:44,292 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2023-08-24 16:14:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:44,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:14:44,545 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 16:14:44,545 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 62 [2023-08-24 16:14:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:45,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735646342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:14:45,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:14:45,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2023-08-24 16:14:45,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141008210] [2023-08-24 16:14:45,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:14:45,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 16:14:45,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:45,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 16:14:45,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 16:14:45,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 253 [2023-08-24 16:14:45,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 205 transitions, 3304 flow. Second operand has 35 states, 35 states have (on average 74.65714285714286) internal successors, (2613), 35 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:45,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:45,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 253 [2023-08-24 16:14:45,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:46,917 INFO L124 PetriNetUnfolderBase]: 794/1546 cut-off events. [2023-08-24 16:14:46,917 INFO L125 PetriNetUnfolderBase]: For 30851/30851 co-relation queries the response was YES. [2023-08-24 16:14:46,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12982 conditions, 1546 events. 794/1546 cut-off events. For 30851/30851 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8806 event pairs, 149 based on Foata normal form. 2/1541 useless extension candidates. Maximal degree in co-relation 12927. Up to 556 conditions per place. [2023-08-24 16:14:46,934 INFO L140 encePairwiseOnDemand]: 243/253 looper letters, 190 selfloop transitions, 135 changer transitions 5/331 dead transitions. [2023-08-24 16:14:46,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 331 transitions, 5582 flow [2023-08-24 16:14:46,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 16:14:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 16:14:46,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1491 transitions. [2023-08-24 16:14:46,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3101726648637404 [2023-08-24 16:14:46,967 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1491 transitions. [2023-08-24 16:14:46,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1491 transitions. [2023-08-24 16:14:46,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:46,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1491 transitions. [2023-08-24 16:14:46,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 78.47368421052632) internal successors, (1491), 19 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:46,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 253.0) internal successors, (5060), 20 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:46,973 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 253.0) internal successors, (5060), 20 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:46,973 INFO L175 Difference]: Start difference. First operand has 153 places, 205 transitions, 3304 flow. Second operand 19 states and 1491 transitions. [2023-08-24 16:14:46,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 331 transitions, 5582 flow [2023-08-24 16:14:47,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 331 transitions, 4915 flow, removed 278 selfloop flow, removed 12 redundant places. [2023-08-24 16:14:47,070 INFO L231 Difference]: Finished difference. Result has 167 places, 272 transitions, 4407 flow [2023-08-24 16:14:47,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4407, PETRI_PLACES=167, PETRI_TRANSITIONS=272} [2023-08-24 16:14:47,071 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2023-08-24 16:14:47,071 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 272 transitions, 4407 flow [2023-08-24 16:14:47,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 74.65714285714286) internal successors, (2613), 35 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:47,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:47,072 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:47,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 16:14:47,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 16:14:47,286 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:47,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:47,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1072072203, now seen corresponding path program 11 times [2023-08-24 16:14:47,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:47,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105211444] [2023-08-24 16:14:47,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:47,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:48,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:48,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105211444] [2023-08-24 16:14:48,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105211444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:48,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565842342] [2023-08-24 16:14:48,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:14:48,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:48,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:48,149 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:48,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 16:14:48,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 16:14:48,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:14:48,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-24 16:14:48,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:48,559 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:48,560 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 7 [2023-08-24 16:14:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:48,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:14:49,007 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:49,007 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 65 [2023-08-24 16:14:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:49,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565842342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:14:49,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:14:49,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2023-08-24 16:14:49,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767853921] [2023-08-24 16:14:49,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:14:49,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 16:14:49,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:14:49,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 16:14:49,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 16:14:49,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 253 [2023-08-24 16:14:49,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 272 transitions, 4407 flow. Second operand has 35 states, 35 states have (on average 74.65714285714286) internal successors, (2613), 35 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:49,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:14:49,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 253 [2023-08-24 16:14:49,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:14:54,223 INFO L124 PetriNetUnfolderBase]: 1388/2801 cut-off events. [2023-08-24 16:14:54,224 INFO L125 PetriNetUnfolderBase]: For 62986/62991 co-relation queries the response was YES. [2023-08-24 16:14:54,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23971 conditions, 2801 events. 1388/2801 cut-off events. For 62986/62991 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 19161 event pairs, 109 based on Foata normal form. 168/2954 useless extension candidates. Maximal degree in co-relation 23910. Up to 1063 conditions per place. [2023-08-24 16:14:54,245 INFO L140 encePairwiseOnDemand]: 243/253 looper letters, 293 selfloop transitions, 335 changer transitions 59/688 dead transitions. [2023-08-24 16:14:54,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 688 transitions, 12309 flow [2023-08-24 16:14:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-24 16:14:54,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-24 16:14:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4011 transitions. [2023-08-24 16:14:54,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31085794001395023 [2023-08-24 16:14:54,250 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4011 transitions. [2023-08-24 16:14:54,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4011 transitions. [2023-08-24 16:14:54,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:14:54,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4011 transitions. [2023-08-24 16:14:54,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 78.6470588235294) internal successors, (4011), 51 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:54,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 253.0) internal successors, (13156), 52 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:54,265 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 253.0) internal successors, (13156), 52 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:54,265 INFO L175 Difference]: Start difference. First operand has 167 places, 272 transitions, 4407 flow. Second operand 51 states and 4011 transitions. [2023-08-24 16:14:54,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 688 transitions, 12309 flow [2023-08-24 16:14:54,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 688 transitions, 11211 flow, removed 533 selfloop flow, removed 7 redundant places. [2023-08-24 16:14:54,415 INFO L231 Difference]: Finished difference. Result has 237 places, 504 transitions, 10009 flow [2023-08-24 16:14:54,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=3888, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=10009, PETRI_PLACES=237, PETRI_TRANSITIONS=504} [2023-08-24 16:14:54,415 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 216 predicate places. [2023-08-24 16:14:54,415 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 504 transitions, 10009 flow [2023-08-24 16:14:54,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 74.65714285714286) internal successors, (2613), 35 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:14:54,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:14:54,416 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:14:54,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 16:14:54,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 16:14:54,616 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:14:54,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:14:54,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1308708245, now seen corresponding path program 12 times [2023-08-24 16:14:54,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:14:54,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686838342] [2023-08-24 16:14:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:14:54,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:14:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:14:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:55,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:14:55,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686838342] [2023-08-24 16:14:55,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686838342] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:14:55,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068440514] [2023-08-24 16:14:55,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:14:55,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:14:55,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:14:55,660 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:14:55,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 16:14:55,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 16:14:55,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:14:55,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-24 16:14:55,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:14:56,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:14:56,081 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 16:14:56,385 INFO L322 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-08-24 16:14:56,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 22 [2023-08-24 16:14:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:14:56,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:14:57,277 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:57,278 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 210 treesize of output 230 [2023-08-24 16:14:57,303 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:57,303 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 157 [2023-08-24 16:14:57,334 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:14:57,334 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 138 [2023-08-24 16:15:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:15:04,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068440514] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:15:04,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:15:04,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-24 16:15:04,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250092033] [2023-08-24 16:15:04,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:15:04,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 16:15:04,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:15:04,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 16:15:04,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1381, Unknown=1, NotChecked=0, Total=1560 [2023-08-24 16:15:04,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 253 [2023-08-24 16:15:04,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 504 transitions, 10009 flow. Second operand has 40 states, 40 states have (on average 70.45) internal successors, (2818), 40 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:15:04,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:15:04,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 253 [2023-08-24 16:15:04,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:15:16,154 WARN L234 SmtUtils]: Spent 10.64s on a formula simplification. DAG size of input: 134 DAG size of output: 132 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:15:33,927 WARN L234 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 136 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:15:34,637 INFO L124 PetriNetUnfolderBase]: 1909/3880 cut-off events. [2023-08-24 16:15:34,637 INFO L125 PetriNetUnfolderBase]: For 101394/101397 co-relation queries the response was YES. [2023-08-24 16:15:34,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36521 conditions, 3880 events. 1909/3880 cut-off events. For 101394/101397 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 28484 event pairs, 309 based on Foata normal form. 133/4002 useless extension candidates. Maximal degree in co-relation 36434. Up to 2125 conditions per place. [2023-08-24 16:15:34,677 INFO L140 encePairwiseOnDemand]: 243/253 looper letters, 506 selfloop transitions, 295 changer transitions 115/917 dead transitions. [2023-08-24 16:15:34,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 917 transitions, 20411 flow [2023-08-24 16:15:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 16:15:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 16:15:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3115 transitions. [2023-08-24 16:15:34,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29314888010540185 [2023-08-24 16:15:34,682 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3115 transitions. [2023-08-24 16:15:34,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3115 transitions. [2023-08-24 16:15:34,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:15:34,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3115 transitions. [2023-08-24 16:15:34,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 74.16666666666667) internal successors, (3115), 42 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:15:34,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 253.0) internal successors, (10879), 43 states have internal predecessors, (10879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:15:34,694 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 253.0) internal successors, (10879), 43 states have internal predecessors, (10879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:15:34,694 INFO L175 Difference]: Start difference. First operand has 237 places, 504 transitions, 10009 flow. Second operand 42 states and 3115 transitions. [2023-08-24 16:15:34,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 917 transitions, 20411 flow [2023-08-24 16:15:35,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 917 transitions, 14963 flow, removed 2667 selfloop flow, removed 17 redundant places. [2023-08-24 16:15:35,325 INFO L231 Difference]: Finished difference. Result has 280 places, 695 transitions, 12598 flow [2023-08-24 16:15:35,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=7641, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=12598, PETRI_PLACES=280, PETRI_TRANSITIONS=695} [2023-08-24 16:15:35,326 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 259 predicate places. [2023-08-24 16:15:35,326 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 695 transitions, 12598 flow [2023-08-24 16:15:35,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 70.45) internal successors, (2818), 40 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:15:35,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:15:35,326 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:15:35,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-24 16:15:35,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:15:35,527 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:15:35,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:15:35,527 INFO L85 PathProgramCache]: Analyzing trace with hash 211943379, now seen corresponding path program 13 times [2023-08-24 16:15:35,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:15:35,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294383945] [2023-08-24 16:15:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:15:35,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:15:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:15:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:15:36,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:15:36,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294383945] [2023-08-24 16:15:36,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294383945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:15:36,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303921029] [2023-08-24 16:15:36,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:15:36,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:15:36,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:15:36,461 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:15:36,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 16:15:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:15:36,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-24 16:15:36,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:15:36,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:15:36,799 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 16:15:37,071 INFO L322 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-24 16:15:37,071 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2023-08-24 16:15:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:15:37,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:15:37,508 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 16:15:37,508 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 168 [2023-08-24 16:15:37,526 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:15:37,526 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 127 [2023-08-24 16:15:37,542 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:15:37,543 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 108 [2023-08-24 16:15:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:15:38,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303921029] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:15:38,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:15:38,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-08-24 16:15:38,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266348584] [2023-08-24 16:15:38,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:15:38,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 16:15:38,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:15:38,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 16:15:38,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1234, Unknown=4, NotChecked=0, Total=1406 [2023-08-24 16:15:38,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 253 [2023-08-24 16:15:38,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 695 transitions, 12598 flow. Second operand has 38 states, 38 states have (on average 70.44736842105263) internal successors, (2677), 38 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:15:38,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:15:38,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 253 [2023-08-24 16:15:38,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:15:47,729 WARN L234 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 98 DAG size of output: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:15:56,689 WARN L234 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 101 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:15:59,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:16:00,400 INFO L124 PetriNetUnfolderBase]: 1800/3694 cut-off events. [2023-08-24 16:16:00,400 INFO L125 PetriNetUnfolderBase]: For 62633/62636 co-relation queries the response was YES. [2023-08-24 16:16:00,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29812 conditions, 3694 events. 1800/3694 cut-off events. For 62633/62636 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27196 event pairs, 257 based on Foata normal form. 41/3728 useless extension candidates. Maximal degree in co-relation 29709. Up to 1135 conditions per place. [2023-08-24 16:16:00,433 INFO L140 encePairwiseOnDemand]: 243/253 looper letters, 368 selfloop transitions, 424 changer transitions 37/830 dead transitions. [2023-08-24 16:16:00,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 830 transitions, 16241 flow [2023-08-24 16:16:00,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 16:16:00,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 16:16:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1559 transitions. [2023-08-24 16:16:00,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29343120647468474 [2023-08-24 16:16:00,436 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1559 transitions. [2023-08-24 16:16:00,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1559 transitions. [2023-08-24 16:16:00,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:16:00,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1559 transitions. [2023-08-24 16:16:00,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 74.23809523809524) internal successors, (1559), 21 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:00,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 253.0) internal successors, (5566), 22 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:00,442 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 253.0) internal successors, (5566), 22 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:00,442 INFO L175 Difference]: Start difference. First operand has 280 places, 695 transitions, 12598 flow. Second operand 21 states and 1559 transitions. [2023-08-24 16:16:00,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 830 transitions, 16241 flow [2023-08-24 16:16:01,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 830 transitions, 14656 flow, removed 757 selfloop flow, removed 21 redundant places. [2023-08-24 16:16:01,018 INFO L231 Difference]: Finished difference. Result has 274 places, 723 transitions, 13191 flow [2023-08-24 16:16:01,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=11092, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=13191, PETRI_PLACES=274, PETRI_TRANSITIONS=723} [2023-08-24 16:16:01,019 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 253 predicate places. [2023-08-24 16:16:01,019 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 723 transitions, 13191 flow [2023-08-24 16:16:01,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 70.44736842105263) internal successors, (2677), 38 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:01,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:16:01,020 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:16:01,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-24 16:16:01,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:16:01,225 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:16:01,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:16:01,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1243273115, now seen corresponding path program 14 times [2023-08-24 16:16:01,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:16:01,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162103501] [2023-08-24 16:16:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:16:01,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:16:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:16:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:16:02,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:16:02,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162103501] [2023-08-24 16:16:02,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162103501] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:16:02,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120680466] [2023-08-24 16:16:02,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:16:02,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:16:02,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:16:02,154 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:16:02,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 16:16:02,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:16:02,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:16:02,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 78 conjunts are in the unsatisfiable core [2023-08-24 16:16:02,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:16:02,300 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-24 16:16:02,339 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 16:16:02,377 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 16:16:02,418 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 16:16:02,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:16:02,644 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-24 16:16:02,857 INFO L322 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-08-24 16:16:02,858 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 22 [2023-08-24 16:16:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:16:02,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:16:04,773 INFO L322 Elim1Store]: treesize reduction 35, result has 58.8 percent of original size [2023-08-24 16:16:04,773 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 218 treesize of output 132 [2023-08-24 16:16:04,878 INFO L322 Elim1Store]: treesize reduction 8, result has 93.2 percent of original size [2023-08-24 16:16:04,879 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 276 treesize of output 326 [2023-08-24 16:16:04,897 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:16:04,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 113 [2023-08-24 16:16:04,949 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 16:16:04,949 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 119 [2023-08-24 16:16:06,056 INFO L322 Elim1Store]: treesize reduction 35, result has 58.8 percent of original size [2023-08-24 16:16:06,057 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 218 treesize of output 132 [2023-08-24 16:16:06,062 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:16:06,122 INFO L322 Elim1Store]: treesize reduction 72, result has 38.5 percent of original size [2023-08-24 16:16:06,123 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 182 treesize of output 168 [2023-08-24 16:16:06,152 INFO L322 Elim1Store]: treesize reduction 36, result has 20.0 percent of original size [2023-08-24 16:16:06,152 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 62 [2023-08-24 16:16:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:16:06,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120680466] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:16:06,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:16:06,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-24 16:16:06,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953574810] [2023-08-24 16:16:06,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:16:06,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 16:16:06,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:16:06,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 16:16:06,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1341, Unknown=8, NotChecked=0, Total=1560 [2023-08-24 16:16:06,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 253 [2023-08-24 16:16:06,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 723 transitions, 13191 flow. Second operand has 40 states, 40 states have (on average 67.45) internal successors, (2698), 40 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:06,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:16:06,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 253 [2023-08-24 16:16:06,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:16:20,128 INFO L124 PetriNetUnfolderBase]: 1809/3675 cut-off events. [2023-08-24 16:16:20,129 INFO L125 PetriNetUnfolderBase]: For 53345/53348 co-relation queries the response was YES. [2023-08-24 16:16:20,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29058 conditions, 3675 events. 1809/3675 cut-off events. For 53345/53348 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 26769 event pairs, 299 based on Foata normal form. 7/3681 useless extension candidates. Maximal degree in co-relation 28961. Up to 3291 conditions per place. [2023-08-24 16:16:20,164 INFO L140 encePairwiseOnDemand]: 243/253 looper letters, 675 selfloop transitions, 98 changer transitions 35/809 dead transitions. [2023-08-24 16:16:20,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 809 transitions, 15645 flow [2023-08-24 16:16:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 16:16:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 16:16:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1756 transitions. [2023-08-24 16:16:20,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2776284584980237 [2023-08-24 16:16:20,167 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1756 transitions. [2023-08-24 16:16:20,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1756 transitions. [2023-08-24 16:16:20,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:16:20,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1756 transitions. [2023-08-24 16:16:20,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 70.24) internal successors, (1756), 25 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:20,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 253.0) internal successors, (6578), 26 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:20,174 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 253.0) internal successors, (6578), 26 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:20,174 INFO L175 Difference]: Start difference. First operand has 274 places, 723 transitions, 13191 flow. Second operand 25 states and 1756 transitions. [2023-08-24 16:16:20,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 809 transitions, 15645 flow [2023-08-24 16:16:20,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 809 transitions, 15036 flow, removed 282 selfloop flow, removed 12 redundant places. [2023-08-24 16:16:20,647 INFO L231 Difference]: Finished difference. Result has 293 places, 738 transitions, 13208 flow [2023-08-24 16:16:20,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=12622, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=13208, PETRI_PLACES=293, PETRI_TRANSITIONS=738} [2023-08-24 16:16:20,648 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 272 predicate places. [2023-08-24 16:16:20,648 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 738 transitions, 13208 flow [2023-08-24 16:16:20,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 67.45) internal successors, (2698), 40 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:20,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:16:20,648 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:16:20,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 16:16:20,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:16:20,849 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:16:20,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:16:20,849 INFO L85 PathProgramCache]: Analyzing trace with hash -34776287, now seen corresponding path program 15 times [2023-08-24 16:16:20,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:16:20,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440353606] [2023-08-24 16:16:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:16:20,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:16:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:16:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:16:22,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:16:22,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440353606] [2023-08-24 16:16:22,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440353606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:16:22,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720553313] [2023-08-24 16:16:22,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:16:22,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:16:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:16:22,121 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:16:22,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 16:16:22,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 16:16:22,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:16:22,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 16:16:22,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:16:22,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:16:22,548 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-24 16:16:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:16:22,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:16:22,944 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:16:22,944 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 124 [2023-08-24 16:16:22,953 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:16:22,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2023-08-24 16:16:22,959 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:16:22,960 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2023-08-24 16:16:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:16:23,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720553313] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:16:23,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:16:23,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 30 [2023-08-24 16:16:23,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834908672] [2023-08-24 16:16:23,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:16:23,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 16:16:23,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:16:23,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 16:16:23,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=903, Unknown=2, NotChecked=0, Total=992 [2023-08-24 16:16:23,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 253 [2023-08-24 16:16:23,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 738 transitions, 13208 flow. Second operand has 32 states, 32 states have (on average 67.65625) internal successors, (2165), 32 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:23,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:16:23,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 253 [2023-08-24 16:16:23,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:16:26,845 INFO L124 PetriNetUnfolderBase]: 1963/4029 cut-off events. [2023-08-24 16:16:26,846 INFO L125 PetriNetUnfolderBase]: For 54518/54518 co-relation queries the response was YES. [2023-08-24 16:16:26,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31662 conditions, 4029 events. 1963/4029 cut-off events. For 54518/54518 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 30125 event pairs, 185 based on Foata normal form. 55/4083 useless extension candidates. Maximal degree in co-relation 31556. Up to 2881 conditions per place. [2023-08-24 16:16:26,887 INFO L140 encePairwiseOnDemand]: 243/253 looper letters, 611 selfloop transitions, 277 changer transitions 68/957 dead transitions. [2023-08-24 16:16:26,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 957 transitions, 17799 flow [2023-08-24 16:16:26,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 16:16:26,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 16:16:26,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2974 transitions. [2023-08-24 16:16:26,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.279879540749106 [2023-08-24 16:16:26,890 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2974 transitions. [2023-08-24 16:16:26,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2974 transitions. [2023-08-24 16:16:26,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:16:26,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2974 transitions. [2023-08-24 16:16:26,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 70.80952380952381) internal successors, (2974), 42 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:26,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 253.0) internal successors, (10879), 43 states have internal predecessors, (10879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:26,898 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 253.0) internal successors, (10879), 43 states have internal predecessors, (10879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:26,898 INFO L175 Difference]: Start difference. First operand has 293 places, 738 transitions, 13208 flow. Second operand 42 states and 2974 transitions. [2023-08-24 16:16:26,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 957 transitions, 17799 flow [2023-08-24 16:16:27,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 957 transitions, 17457 flow, removed 119 selfloop flow, removed 16 redundant places. [2023-08-24 16:16:27,461 INFO L231 Difference]: Finished difference. Result has 331 places, 815 transitions, 15489 flow [2023-08-24 16:16:27,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=12657, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=15489, PETRI_PLACES=331, PETRI_TRANSITIONS=815} [2023-08-24 16:16:27,462 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 310 predicate places. [2023-08-24 16:16:27,462 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 815 transitions, 15489 flow [2023-08-24 16:16:27,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 67.65625) internal successors, (2165), 32 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:27,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:16:27,463 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:16:27,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 16:16:27,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-24 16:16:27,663 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:16:27,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:16:27,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1344336189, now seen corresponding path program 16 times [2023-08-24 16:16:27,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:16:27,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219422766] [2023-08-24 16:16:27,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:16:27,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:16:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:16:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:16:28,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:16:28,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219422766] [2023-08-24 16:16:28,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219422766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:16:28,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12733573] [2023-08-24 16:16:28,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:16:28,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:16:28,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:16:28,384 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:16:28,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 16:16:28,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:16:28,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:16:28,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 16:16:28,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:16:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:16:28,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:16:28,934 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:16:28,934 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 62 [2023-08-24 16:16:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:16:29,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12733573] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:16:29,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:16:29,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 26 [2023-08-24 16:16:29,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159714259] [2023-08-24 16:16:29,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:16:29,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 16:16:29,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:16:29,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 16:16:29,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2023-08-24 16:16:29,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 253 [2023-08-24 16:16:29,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 815 transitions, 15489 flow. Second operand has 28 states, 28 states have (on average 74.71428571428571) internal successors, (2092), 28 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:29,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:16:29,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 253 [2023-08-24 16:16:29,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:16:31,371 INFO L124 PetriNetUnfolderBase]: 1919/3916 cut-off events. [2023-08-24 16:16:31,372 INFO L125 PetriNetUnfolderBase]: For 61164/61164 co-relation queries the response was YES. [2023-08-24 16:16:31,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32486 conditions, 3916 events. 1919/3916 cut-off events. For 61164/61164 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 28607 event pairs, 610 based on Foata normal form. 8/3923 useless extension candidates. Maximal degree in co-relation 32364. Up to 3593 conditions per place. [2023-08-24 16:16:31,417 INFO L140 encePairwiseOnDemand]: 243/253 looper letters, 795 selfloop transitions, 87 changer transitions 28/911 dead transitions. [2023-08-24 16:16:31,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 911 transitions, 18365 flow [2023-08-24 16:16:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 16:16:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 16:16:31,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2322 transitions. [2023-08-24 16:16:31,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3059288537549407 [2023-08-24 16:16:31,420 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2322 transitions. [2023-08-24 16:16:31,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2322 transitions. [2023-08-24 16:16:31,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:16:31,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2322 transitions. [2023-08-24 16:16:31,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 77.4) internal successors, (2322), 30 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:31,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 253.0) internal successors, (7843), 31 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:31,428 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 253.0) internal successors, (7843), 31 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:31,428 INFO L175 Difference]: Start difference. First operand has 331 places, 815 transitions, 15489 flow. Second operand 30 states and 2322 transitions. [2023-08-24 16:16:31,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 911 transitions, 18365 flow [2023-08-24 16:16:32,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 911 transitions, 17671 flow, removed 251 selfloop flow, removed 26 redundant places. [2023-08-24 16:16:32,060 INFO L231 Difference]: Finished difference. Result has 341 places, 840 transitions, 15634 flow [2023-08-24 16:16:32,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=14851, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=15634, PETRI_PLACES=341, PETRI_TRANSITIONS=840} [2023-08-24 16:16:32,061 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 320 predicate places. [2023-08-24 16:16:32,061 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 840 transitions, 15634 flow [2023-08-24 16:16:32,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 74.71428571428571) internal successors, (2092), 28 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:32,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:16:32,062 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:16:32,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 16:16:32,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-24 16:16:32,262 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:16:32,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:16:32,263 INFO L85 PathProgramCache]: Analyzing trace with hash 999216747, now seen corresponding path program 17 times [2023-08-24 16:16:32,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:16:32,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884221802] [2023-08-24 16:16:32,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:16:32,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:16:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:16:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:16:33,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:16:33,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884221802] [2023-08-24 16:16:33,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884221802] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:16:33,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963110851] [2023-08-24 16:16:33,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:16:33,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:16:33,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:16:33,379 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:16:33,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 16:16:33,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 16:16:33,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:16:33,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 74 conjunts are in the unsatisfiable core [2023-08-24 16:16:33,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:16:33,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:16:33,814 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2023-08-24 16:16:33,948 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:16:33,949 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2023-08-24 16:16:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:16:34,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:16:34,239 WARN L839 $PredicateComparison]: unable to prove that (or (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (<= c_~n~0 c_~q_back~0) (< c_~q_front~0 0) (let ((.cse4 (* c_~q_front~0 4))) (let ((.cse1 (+ .cse4 c_~q~0.offset)) (.cse2 (+ .cse4 c_~q~0.offset 4))) (and (forall ((v_ArrVal_837 (Array Int Int))) (<= c_~N~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_837) c_~q~0.base))) (+ c_~s~0 (select .cse0 .cse1) (select .cse0 .cse2))))) (forall ((v_ArrVal_837 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_837) c_~q~0.base))) (+ c_~s~0 (select .cse3 .cse1) (select .cse3 .cse2))) (+ c_~N~0 1)))))) (<= c_~q_back~0 c_~q_front~0)) is different from false [2023-08-24 16:16:34,344 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:16:34,344 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 124 [2023-08-24 16:16:34,353 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:16:34,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2023-08-24 16:16:34,359 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:16:34,360 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2023-08-24 16:16:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:16:34,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963110851] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:16:34,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:16:34,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-08-24 16:16:34,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016968799] [2023-08-24 16:16:34,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:16:34,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 16:16:34,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:16:34,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 16:16:34,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1132, Unknown=4, NotChecked=70, Total=1406 [2023-08-24 16:16:34,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 253 [2023-08-24 16:16:34,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 840 transitions, 15634 flow. Second operand has 38 states, 38 states have (on average 67.52631578947368) internal successors, (2566), 38 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:34,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:16:34,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 253 [2023-08-24 16:16:34,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:16:42,843 INFO L124 PetriNetUnfolderBase]: 2676/5424 cut-off events. [2023-08-24 16:16:42,844 INFO L125 PetriNetUnfolderBase]: For 86185/86188 co-relation queries the response was YES. [2023-08-24 16:16:42,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43396 conditions, 5424 events. 2676/5424 cut-off events. For 86185/86188 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 41556 event pairs, 242 based on Foata normal form. 128/5549 useless extension candidates. Maximal degree in co-relation 43266. Up to 1667 conditions per place. [2023-08-24 16:16:43,025 INFO L140 encePairwiseOnDemand]: 241/253 looper letters, 403 selfloop transitions, 891 changer transitions 97/1392 dead transitions. [2023-08-24 16:16:43,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 1392 transitions, 26561 flow [2023-08-24 16:16:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-24 16:16:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-24 16:16:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3979 transitions. [2023-08-24 16:16:43,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28084415584415584 [2023-08-24 16:16:43,030 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3979 transitions. [2023-08-24 16:16:43,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3979 transitions. [2023-08-24 16:16:43,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:16:43,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3979 transitions. [2023-08-24 16:16:43,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 71.05357142857143) internal successors, (3979), 56 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:43,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 253.0) internal successors, (14421), 57 states have internal predecessors, (14421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:43,044 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 253.0) internal successors, (14421), 57 states have internal predecessors, (14421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:43,044 INFO L175 Difference]: Start difference. First operand has 341 places, 840 transitions, 15634 flow. Second operand 56 states and 3979 transitions. [2023-08-24 16:16:43,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 1392 transitions, 26561 flow [2023-08-24 16:16:43,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1392 transitions, 26098 flow, removed 183 selfloop flow, removed 21 redundant places. [2023-08-24 16:16:43,884 INFO L231 Difference]: Finished difference. Result has 400 places, 1151 transitions, 24215 flow [2023-08-24 16:16:43,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=14497, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=563, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=24215, PETRI_PLACES=400, PETRI_TRANSITIONS=1151} [2023-08-24 16:16:43,885 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 379 predicate places. [2023-08-24 16:16:43,885 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 1151 transitions, 24215 flow [2023-08-24 16:16:43,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 67.52631578947368) internal successors, (2566), 38 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:16:43,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:16:43,885 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:16:43,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 16:16:44,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:16:44,086 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:16:44,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:16:44,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1793632471, now seen corresponding path program 18 times [2023-08-24 16:16:44,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:16:44,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837256163] [2023-08-24 16:16:44,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:16:44,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:16:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:16:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:16:45,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:16:45,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837256163] [2023-08-24 16:16:45,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837256163] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:16:45,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264508724] [2023-08-24 16:16:45,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:16:45,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:16:45,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:16:45,076 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:16:45,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 16:16:45,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 16:16:45,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:16:45,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 87 conjunts are in the unsatisfiable core [2023-08-24 16:16:45,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:16:45,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 16:16:45,300 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 16:16:45,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-24 16:16:45,386 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 16:16:45,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:16:45,505 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-24 16:16:45,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:16:45,709 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:16:45,709 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 26 [2023-08-24 16:16:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:16:45,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:16:57,784 INFO L322 Elim1Store]: treesize reduction 35, result has 58.8 percent of original size [2023-08-24 16:16:57,785 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 222 treesize of output 136 [2023-08-24 16:16:57,922 INFO L322 Elim1Store]: treesize reduction 8, result has 93.2 percent of original size [2023-08-24 16:16:57,923 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 322 treesize of output 371 [2023-08-24 16:16:57,937 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:16:57,946 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:16:57,946 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 177 [2023-08-24 16:16:58,022 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 16:16:58,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 143 treesize of output 147 [2023-08-24 16:16:59,651 INFO L322 Elim1Store]: treesize reduction 35, result has 58.8 percent of original size [2023-08-24 16:16:59,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 222 treesize of output 136 [2023-08-24 16:16:59,658 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:16:59,728 INFO L322 Elim1Store]: treesize reduction 72, result has 38.5 percent of original size [2023-08-24 16:16:59,728 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 184 treesize of output 169 [2023-08-24 16:16:59,759 INFO L322 Elim1Store]: treesize reduction 36, result has 20.0 percent of original size [2023-08-24 16:16:59,759 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 62 [2023-08-24 16:17:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:17:00,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264508724] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:17:00,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:17:00,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2023-08-24 16:17:00,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641882573] [2023-08-24 16:17:00,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:17:00,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 16:17:00,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:17:00,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 16:17:00,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1280, Unknown=4, NotChecked=0, Total=1482 [2023-08-24 16:17:00,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 253 [2023-08-24 16:17:00,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 1151 transitions, 24215 flow. Second operand has 39 states, 39 states have (on average 67.46153846153847) internal successors, (2631), 39 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:00,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:17:00,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 253 [2023-08-24 16:17:00,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:17:07,553 INFO L124 PetriNetUnfolderBase]: 2344/4713 cut-off events. [2023-08-24 16:17:07,553 INFO L125 PetriNetUnfolderBase]: For 90519/90522 co-relation queries the response was YES. [2023-08-24 16:17:07,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43757 conditions, 4713 events. 2344/4713 cut-off events. For 90519/90522 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 34293 event pairs, 144 based on Foata normal form. 182/4894 useless extension candidates. Maximal degree in co-relation 43603. Up to 1592 conditions per place. [2023-08-24 16:17:07,617 INFO L140 encePairwiseOnDemand]: 244/253 looper letters, 357 selfloop transitions, 637 changer transitions 206/1201 dead transitions. [2023-08-24 16:17:07,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1201 transitions, 26519 flow [2023-08-24 16:17:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 16:17:07,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 16:17:07,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1907 transitions. [2023-08-24 16:17:07,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2791684965598009 [2023-08-24 16:17:07,620 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1907 transitions. [2023-08-24 16:17:07,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1907 transitions. [2023-08-24 16:17:07,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:17:07,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1907 transitions. [2023-08-24 16:17:07,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 70.62962962962963) internal successors, (1907), 27 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:07,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 253.0) internal successors, (7084), 28 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:07,625 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 253.0) internal successors, (7084), 28 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:07,625 INFO L175 Difference]: Start difference. First operand has 400 places, 1151 transitions, 24215 flow. Second operand 27 states and 1907 transitions. [2023-08-24 16:17:07,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1201 transitions, 26519 flow [2023-08-24 16:17:08,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1201 transitions, 23814 flow, removed 1135 selfloop flow, removed 34 redundant places. [2023-08-24 16:17:08,893 INFO L231 Difference]: Finished difference. Result has 388 places, 941 transitions, 20049 flow [2023-08-24 16:17:08,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=19488, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1051, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=20049, PETRI_PLACES=388, PETRI_TRANSITIONS=941} [2023-08-24 16:17:08,895 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 367 predicate places. [2023-08-24 16:17:08,895 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 941 transitions, 20049 flow [2023-08-24 16:17:08,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 67.46153846153847) internal successors, (2631), 39 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:08,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:17:08,896 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:17:08,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 16:17:09,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:17:09,103 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:17:09,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:17:09,104 INFO L85 PathProgramCache]: Analyzing trace with hash 800816354, now seen corresponding path program 19 times [2023-08-24 16:17:09,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:17:09,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621106041] [2023-08-24 16:17:09,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:17:09,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:17:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:17:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:17:10,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:17:10,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621106041] [2023-08-24 16:17:10,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621106041] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:17:10,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130182525] [2023-08-24 16:17:10,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:17:10,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:17:10,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:17:10,455 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:17:10,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 16:17:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:17:10,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-24 16:17:10,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:17:10,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:17:10,899 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 16:17:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:17:10,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:17:11,060 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_934 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_934) c_~q~0.base) .cse0)) c_~N~0)) (forall ((v_ArrVal_934 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_934) c_~q~0.base) .cse0)))))) is different from false [2023-08-24 16:17:11,130 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:17:11,130 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 66 [2023-08-24 16:17:11,135 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2023-08-24 16:17:11,138 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2023-08-24 16:17:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-24 16:17:11,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130182525] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:17:11,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:17:11,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 7] total 29 [2023-08-24 16:17:11,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041818332] [2023-08-24 16:17:11,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:17:11,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 16:17:11,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:17:11,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 16:17:11,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=778, Unknown=1, NotChecked=56, Total=930 [2023-08-24 16:17:11,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 253 [2023-08-24 16:17:11,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 941 transitions, 20049 flow. Second operand has 31 states, 31 states have (on average 70.64516129032258) internal successors, (2190), 31 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:11,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:17:11,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 253 [2023-08-24 16:17:11,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:17:13,464 INFO L124 PetriNetUnfolderBase]: 1939/3907 cut-off events. [2023-08-24 16:17:13,464 INFO L125 PetriNetUnfolderBase]: For 57909/57909 co-relation queries the response was YES. [2023-08-24 16:17:13,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36573 conditions, 3907 events. 1939/3907 cut-off events. For 57909/57909 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 27051 event pairs, 465 based on Foata normal form. 1/3907 useless extension candidates. Maximal degree in co-relation 36430. Up to 3757 conditions per place. [2023-08-24 16:17:13,517 INFO L140 encePairwiseOnDemand]: 245/253 looper letters, 902 selfloop transitions, 40 changer transitions 13/956 dead transitions. [2023-08-24 16:17:13,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 956 transitions, 22056 flow [2023-08-24 16:17:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 16:17:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 16:17:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 876 transitions. [2023-08-24 16:17:13,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2885375494071146 [2023-08-24 16:17:13,519 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 876 transitions. [2023-08-24 16:17:13,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 876 transitions. [2023-08-24 16:17:13,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:17:13,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 876 transitions. [2023-08-24 16:17:13,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 73.0) internal successors, (876), 12 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:13,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 253.0) internal successors, (3289), 13 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:13,522 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 253.0) internal successors, (3289), 13 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:13,522 INFO L175 Difference]: Start difference. First operand has 388 places, 941 transitions, 20049 flow. Second operand 12 states and 876 transitions. [2023-08-24 16:17:13,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 956 transitions, 22056 flow [2023-08-24 16:17:14,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 956 transitions, 21311 flow, removed 229 selfloop flow, removed 29 redundant places. [2023-08-24 16:17:14,261 INFO L231 Difference]: Finished difference. Result has 355 places, 936 transitions, 19307 flow [2023-08-24 16:17:14,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=19314, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=901, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=19307, PETRI_PLACES=355, PETRI_TRANSITIONS=936} [2023-08-24 16:17:14,262 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 334 predicate places. [2023-08-24 16:17:14,262 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 936 transitions, 19307 flow [2023-08-24 16:17:14,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 70.64516129032258) internal successors, (2190), 31 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:14,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:17:14,262 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:17:14,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 16:17:14,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 16:17:14,463 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:17:14,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:17:14,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2006739458, now seen corresponding path program 20 times [2023-08-24 16:17:14,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:17:14,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347495468] [2023-08-24 16:17:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:17:14,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:17:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:17:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:17:15,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:17:15,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347495468] [2023-08-24 16:17:15,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347495468] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:17:15,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618345617] [2023-08-24 16:17:15,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:17:15,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:17:15,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:17:15,622 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:17:15,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 16:17:15,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:17:15,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:17:15,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-24 16:17:15,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:17:16,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:17:16,001 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 16:17:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:17:16,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:17:16,290 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:17:16,290 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 66 [2023-08-24 16:17:16,296 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2023-08-24 16:17:16,300 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2023-08-24 16:17:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-24 16:17:16,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618345617] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:17:16,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:17:16,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 7] total 31 [2023-08-24 16:17:16,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006554951] [2023-08-24 16:17:16,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:17:16,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 16:17:16,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:17:16,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 16:17:16,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=939, Unknown=2, NotChecked=0, Total=1056 [2023-08-24 16:17:16,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 253 [2023-08-24 16:17:16,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 936 transitions, 19307 flow. Second operand has 33 states, 33 states have (on average 70.60606060606061) internal successors, (2330), 33 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:16,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:17:16,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 253 [2023-08-24 16:17:16,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:17:18,422 INFO L124 PetriNetUnfolderBase]: 1929/3885 cut-off events. [2023-08-24 16:17:18,422 INFO L125 PetriNetUnfolderBase]: For 50874/50874 co-relation queries the response was YES. [2023-08-24 16:17:18,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34789 conditions, 3885 events. 1929/3885 cut-off events. For 50874/50874 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 26874 event pairs, 471 based on Foata normal form. 1/3885 useless extension candidates. Maximal degree in co-relation 34656. Up to 3732 conditions per place. [2023-08-24 16:17:18,471 INFO L140 encePairwiseOnDemand]: 245/253 looper letters, 897 selfloop transitions, 45 changer transitions 6/949 dead transitions. [2023-08-24 16:17:18,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 949 transitions, 21288 flow [2023-08-24 16:17:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 16:17:18,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 16:17:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 872 transitions. [2023-08-24 16:17:18,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2872200263504611 [2023-08-24 16:17:18,472 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 872 transitions. [2023-08-24 16:17:18,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 872 transitions. [2023-08-24 16:17:18,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:17:18,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 872 transitions. [2023-08-24 16:17:18,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 72.66666666666667) internal successors, (872), 12 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:18,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 253.0) internal successors, (3289), 13 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:18,475 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 253.0) internal successors, (3289), 13 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:18,475 INFO L175 Difference]: Start difference. First operand has 355 places, 936 transitions, 19307 flow. Second operand 12 states and 872 transitions. [2023-08-24 16:17:18,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 949 transitions, 21288 flow [2023-08-24 16:17:19,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 949 transitions, 21020 flow, removed 69 selfloop flow, removed 11 redundant places. [2023-08-24 16:17:19,072 INFO L231 Difference]: Finished difference. Result has 352 places, 935 transitions, 19114 flow [2023-08-24 16:17:19,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=19039, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=19114, PETRI_PLACES=352, PETRI_TRANSITIONS=935} [2023-08-24 16:17:19,073 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 331 predicate places. [2023-08-24 16:17:19,073 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 935 transitions, 19114 flow [2023-08-24 16:17:19,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 70.60606060606061) internal successors, (2330), 33 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:19,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:17:19,074 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:17:19,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-24 16:17:19,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-24 16:17:19,279 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:17:19,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:17:19,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1513434055, now seen corresponding path program 21 times [2023-08-24 16:17:19,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:17:19,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956163402] [2023-08-24 16:17:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:17:19,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:17:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:17:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:17:20,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:17:20,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956163402] [2023-08-24 16:17:20,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956163402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:17:20,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284041330] [2023-08-24 16:17:20,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:17:20,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:17:20,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:17:20,785 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:17:20,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 16:17:20,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 16:17:20,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:17:20,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-24 16:17:20,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:17:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 16:17:21,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:17:21,510 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:17:21,510 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 68 [2023-08-24 16:17:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 16:17:21,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284041330] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:17:21,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:17:21,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 25 [2023-08-24 16:17:21,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027991937] [2023-08-24 16:17:21,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:17:21,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 16:17:21,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:17:21,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 16:17:21,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2023-08-24 16:17:21,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 253 [2023-08-24 16:17:21,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 935 transitions, 19114 flow. Second operand has 27 states, 27 states have (on average 74.77777777777777) internal successors, (2019), 27 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:21,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:17:21,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 253 [2023-08-24 16:17:21,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:17:23,713 INFO L124 PetriNetUnfolderBase]: 1991/4017 cut-off events. [2023-08-24 16:17:23,713 INFO L125 PetriNetUnfolderBase]: For 51573/51576 co-relation queries the response was YES. [2023-08-24 16:17:23,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35460 conditions, 4017 events. 1991/4017 cut-off events. For 51573/51576 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 28041 event pairs, 791 based on Foata normal form. 6/4022 useless extension candidates. Maximal degree in co-relation 35328. Up to 3710 conditions per place. [2023-08-24 16:17:23,764 INFO L140 encePairwiseOnDemand]: 244/253 looper letters, 926 selfloop transitions, 93 changer transitions 6/1026 dead transitions. [2023-08-24 16:17:23,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1026 transitions, 22139 flow [2023-08-24 16:17:23,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 16:17:23,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 16:17:23,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2090 transitions. [2023-08-24 16:17:23,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3059581320450886 [2023-08-24 16:17:23,767 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2090 transitions. [2023-08-24 16:17:23,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2090 transitions. [2023-08-24 16:17:23,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:17:23,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2090 transitions. [2023-08-24 16:17:23,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 77.4074074074074) internal successors, (2090), 27 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:23,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 253.0) internal successors, (7084), 28 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:23,774 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 253.0) internal successors, (7084), 28 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:23,774 INFO L175 Difference]: Start difference. First operand has 352 places, 935 transitions, 19114 flow. Second operand 27 states and 2090 transitions. [2023-08-24 16:17:23,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1026 transitions, 22139 flow [2023-08-24 16:17:24,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1026 transitions, 22019 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-08-24 16:17:24,393 INFO L231 Difference]: Finished difference. Result has 372 places, 964 transitions, 19817 flow [2023-08-24 16:17:24,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=19012, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=864, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=19817, PETRI_PLACES=372, PETRI_TRANSITIONS=964} [2023-08-24 16:17:24,394 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 351 predicate places. [2023-08-24 16:17:24,394 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 964 transitions, 19817 flow [2023-08-24 16:17:24,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 74.77777777777777) internal successors, (2019), 27 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:24,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:17:24,394 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:17:24,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 16:17:24,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 16:17:24,595 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:17:24,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:17:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash -831206899, now seen corresponding path program 22 times [2023-08-24 16:17:24,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:17:24,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102110969] [2023-08-24 16:17:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:17:24,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:17:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:17:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:17:26,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:17:26,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102110969] [2023-08-24 16:17:26,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102110969] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:17:26,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376938729] [2023-08-24 16:17:26,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:17:26,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:17:26,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:17:26,535 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:17:26,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 16:17:26,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:17:26,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:17:26,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-24 16:17:26,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:17:27,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:17:27,047 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-24 16:17:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:17:27,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:17:27,777 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:17:27,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 197 treesize of output 166 [2023-08-24 16:17:27,788 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:17:27,789 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 102 [2023-08-24 16:17:27,796 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:17:27,797 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 83 [2023-08-24 16:17:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 16:17:28,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376938729] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:17:28,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:17:28,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 34 [2023-08-24 16:17:28,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604373133] [2023-08-24 16:17:28,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:17:28,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 16:17:28,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:17:28,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 16:17:28,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1161, Unknown=1, NotChecked=0, Total=1260 [2023-08-24 16:17:28,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 253 [2023-08-24 16:17:28,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 964 transitions, 19817 flow. Second operand has 36 states, 36 states have (on average 70.61111111111111) internal successors, (2542), 36 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:28,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:17:28,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 253 [2023-08-24 16:17:28,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:17:31,268 INFO L124 PetriNetUnfolderBase]: 2036/4114 cut-off events. [2023-08-24 16:17:31,269 INFO L125 PetriNetUnfolderBase]: For 51366/51369 co-relation queries the response was YES. [2023-08-24 16:17:31,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36257 conditions, 4114 events. 2036/4114 cut-off events. For 51366/51369 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 28893 event pairs, 330 based on Foata normal form. 5/4118 useless extension candidates. Maximal degree in co-relation 36120. Up to 3603 conditions per place. [2023-08-24 16:17:31,318 INFO L140 encePairwiseOnDemand]: 245/253 looper letters, 895 selfloop transitions, 135 changer transitions 4/1035 dead transitions. [2023-08-24 16:17:31,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1035 transitions, 22482 flow [2023-08-24 16:17:31,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 16:17:31,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 16:17:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1833 transitions. [2023-08-24 16:17:31,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28980237154150196 [2023-08-24 16:17:31,327 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1833 transitions. [2023-08-24 16:17:31,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1833 transitions. [2023-08-24 16:17:31,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:17:31,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1833 transitions. [2023-08-24 16:17:31,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 73.32) internal successors, (1833), 25 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:31,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 253.0) internal successors, (6578), 26 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:31,334 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 253.0) internal successors, (6578), 26 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:31,334 INFO L175 Difference]: Start difference. First operand has 372 places, 964 transitions, 19817 flow. Second operand 25 states and 1833 transitions. [2023-08-24 16:17:31,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1035 transitions, 22482 flow [2023-08-24 16:17:31,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1035 transitions, 22402 flow, removed 22 selfloop flow, removed 8 redundant places. [2023-08-24 16:17:31,952 INFO L231 Difference]: Finished difference. Result has 391 places, 980 transitions, 20301 flow [2023-08-24 16:17:31,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=19737, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=20301, PETRI_PLACES=391, PETRI_TRANSITIONS=980} [2023-08-24 16:17:31,953 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 370 predicate places. [2023-08-24 16:17:31,953 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 980 transitions, 20301 flow [2023-08-24 16:17:31,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 70.61111111111111) internal successors, (2542), 36 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:31,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:17:31,954 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:17:31,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 16:17:32,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 16:17:32,155 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:17:32,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:17:32,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1959747391, now seen corresponding path program 23 times [2023-08-24 16:17:32,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:17:32,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336854665] [2023-08-24 16:17:32,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:17:32,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:17:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:17:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:17:33,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:17:33,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336854665] [2023-08-24 16:17:33,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336854665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:17:33,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172505030] [2023-08-24 16:17:33,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:17:33,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:17:33,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:17:33,965 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:17:33,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 16:17:34,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 16:17:34,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:17:34,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-24 16:17:34,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:17:34,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:17:34,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 16:17:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:17:34,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:17:34,794 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~q_front~0 4))) (let ((.cse1 (+ c_~q~0.offset (* 4 c_~q_back~0))) (.cse2 (+ .cse5 c_~q~0.offset 4)) (.cse3 (+ .cse5 c_~q~0.offset))) (and (forall ((v_ArrVal_1113 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1113) c_~q~0.base))) (or (not (= (select .cse0 .cse1) 1)) (< |c_thread1Thread1of1ForFork1_~i~0#1| (+ c_~s~0 (select .cse0 .cse2) (select .cse0 .cse3)))))) (forall ((v_ArrVal_1113 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1113) c_~q~0.base))) (or (not (= (select .cse4 .cse1) 1)) (< (+ c_~s~0 (select .cse4 .cse2) (select .cse4 .cse3)) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|)))))))) is different from false [2023-08-24 16:17:34,821 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:17:34,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 170 [2023-08-24 16:17:34,841 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:17:34,841 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 128 [2023-08-24 16:17:34,854 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:17:34,855 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 108 [2023-08-24 16:17:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 16:17:35,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172505030] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:17:35,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:17:35,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 34 [2023-08-24 16:17:35,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014637735] [2023-08-24 16:17:35,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:17:35,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 16:17:35,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:17:35,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 16:17:35,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1100, Unknown=1, NotChecked=66, Total=1260 [2023-08-24 16:17:35,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 253 [2023-08-24 16:17:35,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 980 transitions, 20301 flow. Second operand has 36 states, 36 states have (on average 70.58333333333333) internal successors, (2541), 36 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:35,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:17:35,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 253 [2023-08-24 16:17:35,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:17:39,169 INFO L124 PetriNetUnfolderBase]: 2132/4338 cut-off events. [2023-08-24 16:17:39,169 INFO L125 PetriNetUnfolderBase]: For 58599/58599 co-relation queries the response was YES. [2023-08-24 16:17:39,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38521 conditions, 4338 events. 2132/4338 cut-off events. For 58599/58599 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 30784 event pairs, 495 based on Foata normal form. 5/4342 useless extension candidates. Maximal degree in co-relation 38380. Up to 3681 conditions per place. [2023-08-24 16:17:39,229 INFO L140 encePairwiseOnDemand]: 243/253 looper letters, 889 selfloop transitions, 180 changer transitions 30/1100 dead transitions. [2023-08-24 16:17:39,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 1100 transitions, 24018 flow [2023-08-24 16:17:39,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 16:17:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 16:17:39,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2486 transitions. [2023-08-24 16:17:39,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.289002557544757 [2023-08-24 16:17:39,231 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2486 transitions. [2023-08-24 16:17:39,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2486 transitions. [2023-08-24 16:17:39,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:17:39,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2486 transitions. [2023-08-24 16:17:39,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 73.11764705882354) internal successors, (2486), 34 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:39,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 253.0) internal successors, (8855), 35 states have internal predecessors, (8855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:39,240 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 253.0) internal successors, (8855), 35 states have internal predecessors, (8855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:39,240 INFO L175 Difference]: Start difference. First operand has 391 places, 980 transitions, 20301 flow. Second operand 34 states and 2486 transitions. [2023-08-24 16:17:39,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 1100 transitions, 24018 flow [2023-08-24 16:17:40,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1100 transitions, 23863 flow, removed 22 selfloop flow, removed 14 redundant places. [2023-08-24 16:17:40,109 INFO L231 Difference]: Finished difference. Result has 422 places, 1024 transitions, 21467 flow [2023-08-24 16:17:40,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=20174, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=21467, PETRI_PLACES=422, PETRI_TRANSITIONS=1024} [2023-08-24 16:17:40,110 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 401 predicate places. [2023-08-24 16:17:40,111 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 1024 transitions, 21467 flow [2023-08-24 16:17:40,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 70.58333333333333) internal successors, (2541), 36 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:40,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:17:40,111 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:17:40,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-24 16:17:40,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:17:40,317 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:17:40,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:17:40,317 INFO L85 PathProgramCache]: Analyzing trace with hash 386035690, now seen corresponding path program 24 times [2023-08-24 16:17:40,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:17:40,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602712978] [2023-08-24 16:17:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:17:40,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:17:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:17:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:17:40,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:17:40,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602712978] [2023-08-24 16:17:40,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602712978] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:17:40,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406098055] [2023-08-24 16:17:40,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:17:40,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:17:40,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:17:40,814 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:17:40,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 16:17:41,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 16:17:41,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:17:41,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 16:17:41,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:17:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:17:41,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:17:41,497 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-24 16:17:41,498 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-24 16:17:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:17:41,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406098055] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:17:41,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:17:41,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-24 16:17:41,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741877361] [2023-08-24 16:17:41,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:17:41,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 16:17:41,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:17:41,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 16:17:41,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2023-08-24 16:17:41,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 253 [2023-08-24 16:17:41,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 1024 transitions, 21467 flow. Second operand has 38 states, 38 states have (on average 86.55263157894737) internal successors, (3289), 38 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:41,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:17:41,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 253 [2023-08-24 16:17:41,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:17:48,436 INFO L124 PetriNetUnfolderBase]: 3586/6974 cut-off events. [2023-08-24 16:17:48,436 INFO L125 PetriNetUnfolderBase]: For 129323/129329 co-relation queries the response was YES. [2023-08-24 16:17:48,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69333 conditions, 6974 events. 3586/6974 cut-off events. For 129323/129329 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 53090 event pairs, 181 based on Foata normal form. 126/7097 useless extension candidates. Maximal degree in co-relation 69181. Up to 2117 conditions per place. [2023-08-24 16:17:48,529 INFO L140 encePairwiseOnDemand]: 245/253 looper letters, 549 selfloop transitions, 1229 changer transitions 0/1787 dead transitions. [2023-08-24 16:17:48,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1787 transitions, 40211 flow [2023-08-24 16:17:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-24 16:17:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-24 16:17:48,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 5324 transitions. [2023-08-24 16:17:48,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36281859070464767 [2023-08-24 16:17:48,536 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 5324 transitions. [2023-08-24 16:17:48,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 5324 transitions. [2023-08-24 16:17:48,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:17:48,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 5324 transitions. [2023-08-24 16:17:48,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 91.79310344827586) internal successors, (5324), 58 states have internal predecessors, (5324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:48,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 253.0) internal successors, (14927), 59 states have internal predecessors, (14927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:48,551 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 253.0) internal successors, (14927), 59 states have internal predecessors, (14927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:48,551 INFO L175 Difference]: Start difference. First operand has 422 places, 1024 transitions, 21467 flow. Second operand 58 states and 5324 transitions. [2023-08-24 16:17:48,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1787 transitions, 40211 flow [2023-08-24 16:17:49,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1787 transitions, 39587 flow, removed 226 selfloop flow, removed 18 redundant places. [2023-08-24 16:17:49,756 INFO L231 Difference]: Finished difference. Result has 482 places, 1564 transitions, 38152 flow [2023-08-24 16:17:49,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=21167, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=727, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=38152, PETRI_PLACES=482, PETRI_TRANSITIONS=1564} [2023-08-24 16:17:49,757 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 461 predicate places. [2023-08-24 16:17:49,757 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 1564 transitions, 38152 flow [2023-08-24 16:17:49,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 86.55263157894737) internal successors, (3289), 38 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:49,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:17:49,757 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:17:49,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 16:17:49,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:17:49,958 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:17:49,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:17:49,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1350281370, now seen corresponding path program 25 times [2023-08-24 16:17:49,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:17:49,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865500435] [2023-08-24 16:17:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:17:49,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:17:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:17:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 16:17:50,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:17:50,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865500435] [2023-08-24 16:17:50,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865500435] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:17:50,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236680832] [2023-08-24 16:17:50,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:17:50,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:17:50,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:17:50,135 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:17:50,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 16:17:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:17:50,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:17:50,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:17:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 16:17:50,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:17:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 16:17:50,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236680832] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:17:50,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:17:50,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 16:17:50,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037777770] [2023-08-24 16:17:50,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:17:50,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 16:17:50,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:17:50,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 16:17:50,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2023-08-24 16:17:50,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 253 [2023-08-24 16:17:50,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 1564 transitions, 38152 flow. Second operand has 24 states, 24 states have (on average 98.66666666666667) internal successors, (2368), 24 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:50,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:17:50,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 253 [2023-08-24 16:17:50,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:17:52,092 INFO L124 PetriNetUnfolderBase]: 1439/2888 cut-off events. [2023-08-24 16:17:52,092 INFO L125 PetriNetUnfolderBase]: For 136464/136472 co-relation queries the response was YES. [2023-08-24 16:17:52,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36145 conditions, 2888 events. 1439/2888 cut-off events. For 136464/136472 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18929 event pairs, 537 based on Foata normal form. 92/2976 useless extension candidates. Maximal degree in co-relation 35971. Up to 2632 conditions per place. [2023-08-24 16:17:52,141 INFO L140 encePairwiseOnDemand]: 248/253 looper letters, 426 selfloop transitions, 5 changer transitions 85/523 dead transitions. [2023-08-24 16:17:52,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 523 transitions, 13590 flow [2023-08-24 16:17:52,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 16:17:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 16:17:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1012 transitions. [2023-08-24 16:17:52,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-08-24 16:17:52,143 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1012 transitions. [2023-08-24 16:17:52,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1012 transitions. [2023-08-24 16:17:52,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:17:52,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1012 transitions. [2023-08-24 16:17:52,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 101.2) internal successors, (1012), 10 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:52,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 253.0) internal successors, (2783), 11 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:52,146 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 253.0) internal successors, (2783), 11 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:52,146 INFO L175 Difference]: Start difference. First operand has 482 places, 1564 transitions, 38152 flow. Second operand 10 states and 1012 transitions. [2023-08-24 16:17:52,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 523 transitions, 13590 flow [2023-08-24 16:17:53,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 523 transitions, 10088 flow, removed 1448 selfloop flow, removed 72 redundant places. [2023-08-24 16:17:53,206 INFO L231 Difference]: Finished difference. Result has 376 places, 438 transitions, 7369 flow [2023-08-24 16:17:53,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=8975, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7369, PETRI_PLACES=376, PETRI_TRANSITIONS=438} [2023-08-24 16:17:53,207 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 355 predicate places. [2023-08-24 16:17:53,207 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 438 transitions, 7369 flow [2023-08-24 16:17:53,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 98.66666666666667) internal successors, (2368), 24 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:53,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:17:53,208 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:17:53,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-24 16:17:53,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-24 16:17:53,408 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:17:53,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:17:53,409 INFO L85 PathProgramCache]: Analyzing trace with hash 719809947, now seen corresponding path program 26 times [2023-08-24 16:17:53,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:17:53,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862605856] [2023-08-24 16:17:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:17:53,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:17:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:17:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 16:17:53,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:17:53,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862605856] [2023-08-24 16:17:53,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862605856] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:17:53,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478680166] [2023-08-24 16:17:53,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:17:53,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:17:53,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:17:53,511 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:17:53,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 16:17:53,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:17:53,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:17:53,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:17:53,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:17:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 16:17:53,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:17:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 16:17:53,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478680166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:17:53,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:17:53,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 8] total 13 [2023-08-24 16:17:53,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670797104] [2023-08-24 16:17:53,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:17:53,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 16:17:53,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:17:53,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 16:17:53,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-08-24 16:17:53,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 253 [2023-08-24 16:17:53,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 438 transitions, 7369 flow. Second operand has 14 states, 14 states have (on average 109.57142857142857) internal successors, (1534), 14 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:53,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:17:53,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 253 [2023-08-24 16:17:53,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:17:54,729 INFO L124 PetriNetUnfolderBase]: 1719/3299 cut-off events. [2023-08-24 16:17:54,729 INFO L125 PetriNetUnfolderBase]: For 157304/157315 co-relation queries the response was YES. [2023-08-24 16:17:54,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32672 conditions, 3299 events. 1719/3299 cut-off events. For 157304/157315 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21702 event pairs, 128 based on Foata normal form. 29/3312 useless extension candidates. Maximal degree in co-relation 32537. Up to 1509 conditions per place. [2023-08-24 16:17:54,769 INFO L140 encePairwiseOnDemand]: 248/253 looper letters, 233 selfloop transitions, 262 changer transitions 44/546 dead transitions. [2023-08-24 16:17:54,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 546 transitions, 10297 flow [2023-08-24 16:17:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 16:17:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 16:17:54,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 701 transitions. [2023-08-24 16:17:54,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179183135704877 [2023-08-24 16:17:54,771 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 701 transitions. [2023-08-24 16:17:54,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 701 transitions. [2023-08-24 16:17:54,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:17:54,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 701 transitions. [2023-08-24 16:17:54,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 116.83333333333333) internal successors, (701), 6 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:54,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:54,773 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:54,773 INFO L175 Difference]: Start difference. First operand has 376 places, 438 transitions, 7369 flow. Second operand 6 states and 701 transitions. [2023-08-24 16:17:54,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 546 transitions, 10297 flow [2023-08-24 16:17:55,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 546 transitions, 9607 flow, removed 266 selfloop flow, removed 25 redundant places. [2023-08-24 16:17:55,439 INFO L231 Difference]: Finished difference. Result has 292 places, 476 transitions, 8707 flow [2023-08-24 16:17:55,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=6849, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8707, PETRI_PLACES=292, PETRI_TRANSITIONS=476} [2023-08-24 16:17:55,440 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 271 predicate places. [2023-08-24 16:17:55,440 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 476 transitions, 8707 flow [2023-08-24 16:17:55,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.57142857142857) internal successors, (1534), 14 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:55,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:17:55,440 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:17:55,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 16:17:55,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:17:55,641 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:17:55,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:17:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash -113489214, now seen corresponding path program 27 times [2023-08-24 16:17:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:17:55,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953789635] [2023-08-24 16:17:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:17:55,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:17:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:17:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:17:56,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:17:56,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953789635] [2023-08-24 16:17:56,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953789635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:17:56,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230894045] [2023-08-24 16:17:56,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:17:56,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:17:56,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:17:56,314 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:17:56,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 16:17:56,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 16:17:56,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:17:56,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 16:17:56,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:17:56,804 INFO L322 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2023-08-24 16:17:56,804 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 13 [2023-08-24 16:17:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:17:56,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:17:57,005 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 16:17:57,005 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-08-24 16:17:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:17:57,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230894045] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:17:57,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:17:57,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2023-08-24 16:17:57,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777956] [2023-08-24 16:17:57,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:17:57,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 16:17:57,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:17:57,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 16:17:57,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2023-08-24 16:17:57,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 253 [2023-08-24 16:17:57,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 476 transitions, 8707 flow. Second operand has 36 states, 36 states have (on average 86.52777777777777) internal successors, (3115), 36 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:17:57,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:17:57,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 253 [2023-08-24 16:17:57,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:18:01,199 INFO L124 PetriNetUnfolderBase]: 1966/3916 cut-off events. [2023-08-24 16:18:01,200 INFO L125 PetriNetUnfolderBase]: For 152400/152409 co-relation queries the response was YES. [2023-08-24 16:18:01,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37258 conditions, 3916 events. 1966/3916 cut-off events. For 152400/152409 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28209 event pairs, 227 based on Foata normal form. 347/4238 useless extension candidates. Maximal degree in co-relation 37131. Up to 1175 conditions per place. [2023-08-24 16:18:01,248 INFO L140 encePairwiseOnDemand]: 245/253 looper letters, 438 selfloop transitions, 345 changer transitions 150/940 dead transitions. [2023-08-24 16:18:01,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 940 transitions, 18676 flow [2023-08-24 16:18:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-24 16:18:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-24 16:18:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4584 transitions. [2023-08-24 16:18:01,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3552662171588003 [2023-08-24 16:18:01,252 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4584 transitions. [2023-08-24 16:18:01,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4584 transitions. [2023-08-24 16:18:01,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:18:01,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4584 transitions. [2023-08-24 16:18:01,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 89.88235294117646) internal successors, (4584), 51 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:01,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 253.0) internal successors, (13156), 52 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:01,266 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 253.0) internal successors, (13156), 52 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:01,266 INFO L175 Difference]: Start difference. First operand has 292 places, 476 transitions, 8707 flow. Second operand 51 states and 4584 transitions. [2023-08-24 16:18:01,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 940 transitions, 18676 flow [2023-08-24 16:18:02,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 940 transitions, 16124 flow, removed 1229 selfloop flow, removed 21 redundant places. [2023-08-24 16:18:02,210 INFO L231 Difference]: Finished difference. Result has 312 places, 650 transitions, 12345 flow [2023-08-24 16:18:02,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=7099, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=12345, PETRI_PLACES=312, PETRI_TRANSITIONS=650} [2023-08-24 16:18:02,211 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 291 predicate places. [2023-08-24 16:18:02,211 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 650 transitions, 12345 flow [2023-08-24 16:18:02,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 86.52777777777777) internal successors, (3115), 36 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:02,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:18:02,212 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:18:02,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-24 16:18:02,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:18:02,412 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:18:02,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:18:02,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1883542376, now seen corresponding path program 28 times [2023-08-24 16:18:02,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:18:02,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521281815] [2023-08-24 16:18:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:18:02,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:18:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:18:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:18:03,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:18:03,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521281815] [2023-08-24 16:18:03,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521281815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:18:03,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916608425] [2023-08-24 16:18:03,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:18:03,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:18:03,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:18:03,064 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:18:03,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 16:18:03,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:18:03,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:18:03,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 16:18:03,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:18:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:18:03,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:18:03,788 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-24 16:18:03,789 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-24 16:18:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:18:04,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916608425] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:18:04,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:18:04,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-24 16:18:04,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379070469] [2023-08-24 16:18:04,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:18:04,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 16:18:04,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:18:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 16:18:04,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1163, Unknown=0, NotChecked=0, Total=1406 [2023-08-24 16:18:04,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 253 [2023-08-24 16:18:04,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 650 transitions, 12345 flow. Second operand has 38 states, 38 states have (on average 86.55263157894737) internal successors, (3289), 38 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:04,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:18:04,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 253 [2023-08-24 16:18:04,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:18:09,483 INFO L124 PetriNetUnfolderBase]: 2991/5937 cut-off events. [2023-08-24 16:18:09,483 INFO L125 PetriNetUnfolderBase]: For 129962/129971 co-relation queries the response was YES. [2023-08-24 16:18:09,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51077 conditions, 5937 events. 2991/5937 cut-off events. For 129962/129971 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 45429 event pairs, 202 based on Foata normal form. 135/6065 useless extension candidates. Maximal degree in co-relation 50945. Up to 1877 conditions per place. [2023-08-24 16:18:09,562 INFO L140 encePairwiseOnDemand]: 245/253 looper letters, 442 selfloop transitions, 884 changer transitions 4/1337 dead transitions. [2023-08-24 16:18:09,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1337 transitions, 25791 flow [2023-08-24 16:18:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-24 16:18:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-24 16:18:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 5091 transitions. [2023-08-24 16:18:09,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35933088650479955 [2023-08-24 16:18:09,566 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 5091 transitions. [2023-08-24 16:18:09,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 5091 transitions. [2023-08-24 16:18:09,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:18:09,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 5091 transitions. [2023-08-24 16:18:09,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 90.91071428571429) internal successors, (5091), 56 states have internal predecessors, (5091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:09,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 253.0) internal successors, (14421), 57 states have internal predecessors, (14421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:09,576 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 253.0) internal successors, (14421), 57 states have internal predecessors, (14421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:09,576 INFO L175 Difference]: Start difference. First operand has 312 places, 650 transitions, 12345 flow. Second operand 56 states and 5091 transitions. [2023-08-24 16:18:09,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1337 transitions, 25791 flow [2023-08-24 16:18:10,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1337 transitions, 23465 flow, removed 1114 selfloop flow, removed 23 redundant places. [2023-08-24 16:18:10,448 INFO L231 Difference]: Finished difference. Result has 346 places, 1132 transitions, 21399 flow [2023-08-24 16:18:10,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=11120, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=429, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=21399, PETRI_PLACES=346, PETRI_TRANSITIONS=1132} [2023-08-24 16:18:10,449 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 325 predicate places. [2023-08-24 16:18:10,449 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 1132 transitions, 21399 flow [2023-08-24 16:18:10,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 86.55263157894737) internal successors, (3289), 38 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:10,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:18:10,450 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:18:10,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 16:18:10,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-24 16:18:10,655 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:18:10,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:18:10,655 INFO L85 PathProgramCache]: Analyzing trace with hash 231862130, now seen corresponding path program 29 times [2023-08-24 16:18:10,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:18:10,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181619028] [2023-08-24 16:18:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:18:10,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:18:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:18:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:18:11,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:18:11,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181619028] [2023-08-24 16:18:11,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181619028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:18:11,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456739789] [2023-08-24 16:18:11,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:18:11,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:18:11,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:18:11,237 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:18:11,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 16:18:11,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 16:18:11,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:18:11,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 16:18:11,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:18:11,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:18:11,645 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-24 16:18:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:18:11,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:18:12,006 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:18:12,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2023-08-24 16:18:12,010 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-24 16:18:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:18:12,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456739789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:18:12,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:18:12,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-08-24 16:18:12,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104525632] [2023-08-24 16:18:12,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:18:12,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 16:18:12,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:18:12,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 16:18:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2023-08-24 16:18:12,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 253 [2023-08-24 16:18:12,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 1132 transitions, 21399 flow. Second operand has 41 states, 41 states have (on average 82.4390243902439) internal successors, (3380), 41 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:12,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:18:12,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 253 [2023-08-24 16:18:12,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:18:18,918 INFO L124 PetriNetUnfolderBase]: 5065/9446 cut-off events. [2023-08-24 16:18:18,918 INFO L125 PetriNetUnfolderBase]: For 214358/214367 co-relation queries the response was YES. [2023-08-24 16:18:19,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82643 conditions, 9446 events. 5065/9446 cut-off events. For 214358/214367 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 68305 event pairs, 243 based on Foata normal form. 491/9932 useless extension candidates. Maximal degree in co-relation 82514. Up to 2745 conditions per place. [2023-08-24 16:18:19,043 INFO L140 encePairwiseOnDemand]: 245/253 looper letters, 745 selfloop transitions, 1398 changer transitions 5/2155 dead transitions. [2023-08-24 16:18:19,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 2155 transitions, 42423 flow [2023-08-24 16:18:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-24 16:18:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-24 16:18:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4538 transitions. [2023-08-24 16:18:19,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3449376710246275 [2023-08-24 16:18:19,047 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4538 transitions. [2023-08-24 16:18:19,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4538 transitions. [2023-08-24 16:18:19,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:18:19,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4538 transitions. [2023-08-24 16:18:19,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 87.26923076923077) internal successors, (4538), 52 states have internal predecessors, (4538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:19,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 253.0) internal successors, (13409), 53 states have internal predecessors, (13409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:19,061 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 253.0) internal successors, (13409), 53 states have internal predecessors, (13409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:19,061 INFO L175 Difference]: Start difference. First operand has 346 places, 1132 transitions, 21399 flow. Second operand 52 states and 4538 transitions. [2023-08-24 16:18:19,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 2155 transitions, 42423 flow [2023-08-24 16:18:20,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 2155 transitions, 36550 flow, removed 2883 selfloop flow, removed 20 redundant places. [2023-08-24 16:18:20,685 INFO L231 Difference]: Finished difference. Result has 401 places, 1798 transitions, 32912 flow [2023-08-24 16:18:20,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=16933, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1037, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=795, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=32912, PETRI_PLACES=401, PETRI_TRANSITIONS=1798} [2023-08-24 16:18:20,686 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 380 predicate places. [2023-08-24 16:18:20,686 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 1798 transitions, 32912 flow [2023-08-24 16:18:20,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 82.4390243902439) internal successors, (3380), 41 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:20,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:18:20,687 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:18:20,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-24 16:18:20,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-24 16:18:20,887 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:18:20,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:18:20,888 INFO L85 PathProgramCache]: Analyzing trace with hash -271850916, now seen corresponding path program 30 times [2023-08-24 16:18:20,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:18:20,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157652377] [2023-08-24 16:18:20,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:18:20,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:18:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:18:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:18:21,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:18:21,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157652377] [2023-08-24 16:18:21,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157652377] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:18:21,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703899140] [2023-08-24 16:18:21,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:18:21,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:18:21,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:18:21,423 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:18:21,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 16:18:21,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 16:18:21,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:18:21,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-24 16:18:21,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:18:21,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:18:21,996 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 16:18:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:18:22,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:18:22,248 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:18:22,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2023-08-24 16:18:22,253 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-24 16:18:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:18:22,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703899140] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:18:22,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:18:22,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-08-24 16:18:22,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790954803] [2023-08-24 16:18:22,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:18:22,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 16:18:22,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:18:22,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 16:18:22,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1416, Unknown=1, NotChecked=0, Total=1640 [2023-08-24 16:18:22,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 253 [2023-08-24 16:18:22,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 1798 transitions, 32912 flow. Second operand has 41 states, 41 states have (on average 82.29268292682927) internal successors, (3374), 41 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:22,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:18:22,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 253 [2023-08-24 16:18:22,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:18:32,647 INFO L124 PetriNetUnfolderBase]: 7997/14781 cut-off events. [2023-08-24 16:18:32,647 INFO L125 PetriNetUnfolderBase]: For 390099/390108 co-relation queries the response was YES. [2023-08-24 16:18:32,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127577 conditions, 14781 events. 7997/14781 cut-off events. For 390099/390108 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 114609 event pairs, 419 based on Foata normal form. 15/14793 useless extension candidates. Maximal degree in co-relation 127430. Up to 6498 conditions per place. [2023-08-24 16:18:32,855 INFO L140 encePairwiseOnDemand]: 245/253 looper letters, 1601 selfloop transitions, 1526 changer transitions 0/3134 dead transitions. [2023-08-24 16:18:32,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 3134 transitions, 61047 flow [2023-08-24 16:18:32,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-24 16:18:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-24 16:18:32,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4436 transitions. [2023-08-24 16:18:32,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3437960164302875 [2023-08-24 16:18:32,858 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4436 transitions. [2023-08-24 16:18:32,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4436 transitions. [2023-08-24 16:18:32,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:18:32,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4436 transitions. [2023-08-24 16:18:32,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 86.98039215686275) internal successors, (4436), 51 states have internal predecessors, (4436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:32,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 253.0) internal successors, (13156), 52 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:32,867 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 253.0) internal successors, (13156), 52 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:32,867 INFO L175 Difference]: Start difference. First operand has 401 places, 1798 transitions, 32912 flow. Second operand 51 states and 4436 transitions. [2023-08-24 16:18:32,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 3134 transitions, 61047 flow [2023-08-24 16:18:37,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 3134 transitions, 55075 flow, removed 2697 selfloop flow, removed 12 redundant places. [2023-08-24 16:18:37,550 INFO L231 Difference]: Finished difference. Result has 467 places, 2765 transitions, 51062 flow [2023-08-24 16:18:37,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=29842, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=672, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=51062, PETRI_PLACES=467, PETRI_TRANSITIONS=2765} [2023-08-24 16:18:37,552 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 446 predicate places. [2023-08-24 16:18:37,552 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 2765 transitions, 51062 flow [2023-08-24 16:18:37,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 82.29268292682927) internal successors, (3374), 41 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:37,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:18:37,553 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:18:37,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-24 16:18:37,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-24 16:18:37,753 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:18:37,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:18:37,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2104825266, now seen corresponding path program 31 times [2023-08-24 16:18:37,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:18:37,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543847345] [2023-08-24 16:18:37,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:18:37,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:18:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:18:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:18:38,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:18:38,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543847345] [2023-08-24 16:18:38,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543847345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:18:38,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341918619] [2023-08-24 16:18:38,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:18:38,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:18:38,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:18:38,696 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:18:38,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 16:18:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:18:38,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 16:18:38,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:18:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 16:18:39,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:18:39,090 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-24 16:18:39,091 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-24 16:18:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-24 16:18:39,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341918619] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:18:39,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:18:39,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2023-08-24 16:18:39,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784676871] [2023-08-24 16:18:39,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:18:39,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 16:18:39,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:18:39,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 16:18:39,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2023-08-24 16:18:39,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 253 [2023-08-24 16:18:39,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 2765 transitions, 51062 flow. Second operand has 25 states, 25 states have (on average 86.88) internal successors, (2172), 25 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:39,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:18:39,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 253 [2023-08-24 16:18:39,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:18:51,376 INFO L124 PetriNetUnfolderBase]: 9182/16807 cut-off events. [2023-08-24 16:18:51,377 INFO L125 PetriNetUnfolderBase]: For 405933/405946 co-relation queries the response was YES. [2023-08-24 16:18:51,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145314 conditions, 16807 events. 9182/16807 cut-off events. For 405933/405946 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 131808 event pairs, 1075 based on Foata normal form. 133/16930 useless extension candidates. Maximal degree in co-relation 145142. Up to 12320 conditions per place. [2023-08-24 16:18:51,681 INFO L140 encePairwiseOnDemand]: 245/253 looper letters, 2477 selfloop transitions, 848 changer transitions 3/3335 dead transitions. [2023-08-24 16:18:51,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 3335 transitions, 67000 flow [2023-08-24 16:18:51,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 16:18:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 16:18:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3082 transitions. [2023-08-24 16:18:51,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3582887700534759 [2023-08-24 16:18:51,684 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3082 transitions. [2023-08-24 16:18:51,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3082 transitions. [2023-08-24 16:18:51,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:18:51,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3082 transitions. [2023-08-24 16:18:51,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 90.6470588235294) internal successors, (3082), 34 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:51,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 253.0) internal successors, (8855), 35 states have internal predecessors, (8855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:51,691 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 253.0) internal successors, (8855), 35 states have internal predecessors, (8855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:51,691 INFO L175 Difference]: Start difference. First operand has 467 places, 2765 transitions, 51062 flow. Second operand 34 states and 3082 transitions. [2023-08-24 16:18:51,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 3335 transitions, 67000 flow [2023-08-24 16:18:58,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 3335 transitions, 66543 flow, removed 217 selfloop flow, removed 9 redundant places. [2023-08-24 16:18:58,547 INFO L231 Difference]: Finished difference. Result has 499 places, 3049 transitions, 58553 flow [2023-08-24 16:18:58,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=50585, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=584, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1993, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=58553, PETRI_PLACES=499, PETRI_TRANSITIONS=3049} [2023-08-24 16:18:58,550 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 478 predicate places. [2023-08-24 16:18:58,550 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 3049 transitions, 58553 flow [2023-08-24 16:18:58,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 86.88) internal successors, (2172), 25 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:18:58,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:18:58,550 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:18:58,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-24 16:18:58,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:18:58,756 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:18:58,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:18:58,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2109519708, now seen corresponding path program 32 times [2023-08-24 16:18:58,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:18:58,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597578210] [2023-08-24 16:18:58,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:18:58,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:18:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:18:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:18:59,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:18:59,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597578210] [2023-08-24 16:18:59,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597578210] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:18:59,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37173798] [2023-08-24 16:18:59,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:18:59,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:18:59,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:18:59,824 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:18:59,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-24 16:18:59,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:18:59,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:18:59,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 16:18:59,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:19:00,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:19:00,232 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-24 16:19:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:19:00,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:19:00,480 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:19:00,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2023-08-24 16:19:00,485 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-24 16:19:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-24 16:19:00,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37173798] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:19:00,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:19:00,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 35 [2023-08-24 16:19:00,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343095883] [2023-08-24 16:19:00,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:19:00,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 16:19:00,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:19:00,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 16:19:00,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1164, Unknown=4, NotChecked=0, Total=1260 [2023-08-24 16:19:00,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 253 [2023-08-24 16:19:00,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 3049 transitions, 58553 flow. Second operand has 36 states, 36 states have (on average 82.61111111111111) internal successors, (2974), 36 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:19:00,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:19:00,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 253 [2023-08-24 16:19:00,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:19:14,091 INFO L124 PetriNetUnfolderBase]: 9299/17006 cut-off events. [2023-08-24 16:19:14,091 INFO L125 PetriNetUnfolderBase]: For 420341/420354 co-relation queries the response was YES. [2023-08-24 16:19:14,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151411 conditions, 17006 events. 9299/17006 cut-off events. For 420341/420354 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 133439 event pairs, 520 based on Foata normal form. 45/17041 useless extension candidates. Maximal degree in co-relation 151230. Up to 11904 conditions per place. [2023-08-24 16:19:14,398 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 2370 selfloop transitions, 911 changer transitions 0/3288 dead transitions. [2023-08-24 16:19:14,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 3288 transitions, 68753 flow [2023-08-24 16:19:14,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 16:19:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 16:19:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2143 transitions. [2023-08-24 16:19:14,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33881422924901183 [2023-08-24 16:19:14,401 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2143 transitions. [2023-08-24 16:19:14,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2143 transitions. [2023-08-24 16:19:14,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:19:14,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2143 transitions. [2023-08-24 16:19:14,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 85.72) internal successors, (2143), 25 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:19:14,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 253.0) internal successors, (6578), 26 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:19:14,407 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 253.0) internal successors, (6578), 26 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:19:14,407 INFO L175 Difference]: Start difference. First operand has 499 places, 3049 transitions, 58553 flow. Second operand 25 states and 2143 transitions. [2023-08-24 16:19:14,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 3288 transitions, 68753 flow [2023-08-24 16:19:21,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 3288 transitions, 67356 flow, removed 320 selfloop flow, removed 14 redundant places. [2023-08-24 16:19:21,458 INFO L231 Difference]: Finished difference. Result has 511 places, 3066 transitions, 59773 flow [2023-08-24 16:19:21,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=57156, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3049, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=898, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=59773, PETRI_PLACES=511, PETRI_TRANSITIONS=3066} [2023-08-24 16:19:21,461 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 490 predicate places. [2023-08-24 16:19:21,461 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 3066 transitions, 59773 flow [2023-08-24 16:19:21,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 82.61111111111111) internal successors, (2974), 36 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:19:21,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:19:21,461 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:19:21,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-24 16:19:21,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 16:19:21,669 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:19:21,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:19:21,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1402288328, now seen corresponding path program 33 times [2023-08-24 16:19:21,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:19:21,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522173310] [2023-08-24 16:19:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:19:21,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:19:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:19:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:19:22,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:19:22,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522173310] [2023-08-24 16:19:22,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522173310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:19:22,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588853342] [2023-08-24 16:19:22,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:19:22,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:19:22,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:19:22,892 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:19:22,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-24 16:19:23,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 16:19:23,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:19:23,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 90 conjunts are in the unsatisfiable core [2023-08-24 16:19:23,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:19:23,389 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-24 16:19:23,424 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 16:19:23,470 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 16:19:23,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:19:23,720 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2023-08-24 16:19:24,236 INFO L322 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2023-08-24 16:19:24,237 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 46 [2023-08-24 16:19:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:19:24,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:19:46,582 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:19:46,582 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 216 treesize of output 121 [2023-08-24 16:19:46,669 INFO L322 Elim1Store]: treesize reduction 40, result has 66.9 percent of original size [2023-08-24 16:19:46,670 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 234 treesize of output 265 [2023-08-24 16:19:46,681 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:19:46,682 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:19:46,682 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:19:46,683 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 76 [2023-08-24 16:19:46,772 INFO L322 Elim1Store]: treesize reduction 40, result has 66.9 percent of original size [2023-08-24 16:19:46,772 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 120 treesize of output 163 [2023-08-24 16:19:49,937 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:19:49,937 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 216 treesize of output 121 [2023-08-24 16:19:49,943 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:19:49,985 INFO L322 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2023-08-24 16:19:49,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 127 [2023-08-24 16:19:50,031 INFO L322 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2023-08-24 16:19:50,031 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 103 treesize of output 78 [2023-08-24 16:19:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:19:50,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588853342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:19:50,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:19:50,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2023-08-24 16:19:50,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973374505] [2023-08-24 16:19:50,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:19:50,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-24 16:19:50,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:19:50,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-24 16:19:50,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2046, Unknown=11, NotChecked=0, Total=2352 [2023-08-24 16:19:50,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 253 [2023-08-24 16:19:50,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 3066 transitions, 59773 flow. Second operand has 49 states, 49 states have (on average 67.36734693877551) internal successors, (3301), 49 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:19:50,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:19:50,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 253 [2023-08-24 16:19:50,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:20:56,929 WARN L234 SmtUtils]: Spent 1.03m on a formula simplification. DAG size of input: 163 DAG size of output: 138 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:22:56,689 WARN L234 SmtUtils]: Spent 1.99m on a formula simplification. DAG size of input: 187 DAG size of output: 184 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:23:17,367 WARN L234 SmtUtils]: Spent 18.36s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:25:08,122 WARN L234 SmtUtils]: Spent 1.84m on a formula simplification. DAG size of input: 200 DAG size of output: 177 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:25:10,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 16:27:07,158 WARN L234 SmtUtils]: Spent 1.88m on a formula simplification. DAG size of input: 176 DAG size of output: 176 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:27:09,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:27:11,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:27:13,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:27:14,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Received shutdown request... [2023-08-24 16:27:31,721 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 16:27:31,721 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 16:27:32,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-24 16:27:32,922 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-08-24 16:27:32,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 [2023-08-24 16:27:32,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 16:27:32,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-24 16:27:32,956 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Not enough levels on assertion stack at de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.pop(UndoableWrapperScript.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.restore(UndoableWrapperScript.java:87) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:264) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:167) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:376) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.NestedWordAutomataUtils.getSuccessorState(NestedWordAutomataUtils.java:482) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getOrConstructTransition(DifferencePetriNet.java:279) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getTransitions(DifferencePetriNet.java:261) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.addFullyInstantiatedCandidate(PossibleExtensions.java:168) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:195) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.update(PossibleExtensions.java:135) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolderBase.computeUnfoldingHelper(PetriNetUnfolderBase.java:226) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolderBase.computeUnfolding(PetriNetUnfolderBase.java:183) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolderBase.(PetriNetUnfolderBase.java:123) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.(PetriNetUnfolder.java:72) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:76) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:64) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePairwiseOnDemand.(DifferencePairwiseOnDemand.java:128) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.enhanceAnddeterminizeInterpolantAutomaton(CegarLoopForPetriNet.java:481) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.refineAbstraction(CegarLoopForPetriNet.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-08-24 16:27:32,959 INFO L158 Benchmark]: Toolchain (without parser) took 817074.24ms. Allocated memory was 348.1MB in the beginning and 5.8GB in the end (delta: 5.5GB). Free memory was 324.0MB in the beginning and 3.1GB in the end (delta: -2.8GB). Peak memory consumption was 2.7GB. Max. memory is 16.0GB. [2023-08-24 16:27:32,959 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 348.1MB. Free memory is still 325.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 16:27:32,959 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.52ms. Allocated memory is still 348.1MB. Free memory was 324.0MB in the beginning and 312.3MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 16:27:32,960 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.98ms. Allocated memory is still 348.1MB. Free memory was 312.3MB in the beginning and 310.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 16:27:32,961 INFO L158 Benchmark]: Boogie Preprocessor took 45.05ms. Allocated memory is still 348.1MB. Free memory was 310.6MB in the beginning and 309.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 16:27:32,961 INFO L158 Benchmark]: RCFGBuilder took 553.23ms. Allocated memory is still 348.1MB. Free memory was 308.9MB in the beginning and 284.3MB in the end (delta: 24.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-24 16:27:32,961 INFO L158 Benchmark]: TraceAbstraction took 816124.92ms. Allocated memory was 348.1MB in the beginning and 5.8GB in the end (delta: 5.5GB). Free memory was 283.3MB in the beginning and 3.1GB in the end (delta: -2.8GB). Peak memory consumption was 2.7GB. Max. memory is 16.0GB. [2023-08-24 16:27:32,962 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 348.1MB. Free memory is still 325.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 292.52ms. Allocated memory is still 348.1MB. Free memory was 324.0MB in the beginning and 312.3MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 47.98ms. Allocated memory is still 348.1MB. Free memory was 312.3MB in the beginning and 310.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 45.05ms. Allocated memory is still 348.1MB. Free memory was 310.6MB in the beginning and 309.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 553.23ms. Allocated memory is still 348.1MB. Free memory was 308.9MB in the beginning and 284.3MB in the end (delta: 24.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 816124.92ms. Allocated memory was 348.1MB in the beginning and 5.8GB in the end (delta: 5.5GB). Free memory was 283.3MB in the beginning and 3.1GB in the end (delta: -2.8GB). Peak memory consumption was 2.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.9s, 116 PlacesBefore, 21 PlacesAfterwards, 120 TransitionsBefore, 17 TransitionsAfterwards, 576 CoEnabledTransitionPairs, 7 FixpointIterations, 74 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 16 TrivialYvCompositions, 7 ConcurrentYvCompositions, 8 ChoiceCompositions, 123 TotalNumberOfCompositions, 674 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 583, independent: 560, independent conditional: 0, independent unconditional: 560, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 318, independent: 309, independent conditional: 0, independent unconditional: 309, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 583, independent: 251, independent conditional: 0, independent unconditional: 251, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 318, unknown conditional: 0, unknown unconditional: 318] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 17, Positive conditional cache size: 0, Positive unconditional cache size: 17, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: Not enough levels on assertion stack de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Not enough levels on assertion stack: de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown