/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 03:33:36,225 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 03:33:36,302 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 03:33:36,306 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 03:33:36,307 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 03:33:36,336 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 03:33:36,337 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 03:33:36,337 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 03:33:36,338 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 03:33:36,342 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 03:33:36,342 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 03:33:36,342 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 03:33:36,342 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 03:33:36,344 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 03:33:36,344 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 03:33:36,344 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 03:33:36,344 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 03:33:36,345 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 03:33:36,345 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 03:33:36,345 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 03:33:36,345 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 03:33:36,346 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 03:33:36,346 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 03:33:36,347 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 03:33:36,347 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 03:33:36,347 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 03:33:36,347 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 03:33:36,347 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 03:33:36,348 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 03:33:36,348 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 03:33:36,349 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 03:33:36,349 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 03:33:36,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 03:33:36,349 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 03:33:36,349 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 03:33:36,350 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 03:33:36,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 03:33:36,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 03:33:36,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 03:33:36,677 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 03:33:36,678 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 03:33:36,679 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-24 03:33:37,797 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 03:33:37,983 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 03:33:37,984 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-24 03:33:37,991 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a450fff2/c8025225a459430eb4776b784dddf2b0/FLAG27b9ae9cb [2023-08-24 03:33:38,005 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a450fff2/c8025225a459430eb4776b784dddf2b0 [2023-08-24 03:33:38,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 03:33:38,011 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 03:33:38,015 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 03:33:38,016 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 03:33:38,018 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 03:33:38,020 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:33:38" (1/1) ... [2023-08-24 03:33:38,021 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@564581a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:33:38, skipping insertion in model container [2023-08-24 03:33:38,021 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:33:38" (1/1) ... [2023-08-24 03:33:38,045 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 03:33:38,225 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-send-receive-alt.wvr.c[2650,2663] [2023-08-24 03:33:38,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 03:33:38,244 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 03:33:38,278 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-send-receive-alt.wvr.c[2650,2663] [2023-08-24 03:33:38,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 03:33:38,287 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 03:33:38,287 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 03:33:38,293 INFO L206 MainTranslator]: Completed translation [2023-08-24 03:33:38,293 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:33:38 WrapperNode [2023-08-24 03:33:38,294 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 03:33:38,295 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 03:33:38,295 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 03:33:38,295 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 03:33:38,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:33:38" (1/1) ... [2023-08-24 03:33:38,315 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:33:38" (1/1) ... [2023-08-24 03:33:38,349 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 148 [2023-08-24 03:33:38,350 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 03:33:38,351 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 03:33:38,351 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 03:33:38,351 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 03:33:38,358 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:33:38" (1/1) ... [2023-08-24 03:33:38,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:33:38" (1/1) ... [2023-08-24 03:33:38,371 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:33:38" (1/1) ... [2023-08-24 03:33:38,372 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:33:38" (1/1) ... [2023-08-24 03:33:38,377 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:33:38" (1/1) ... [2023-08-24 03:33:38,379 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:33:38" (1/1) ... [2023-08-24 03:33:38,381 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:33:38" (1/1) ... [2023-08-24 03:33:38,382 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:33:38" (1/1) ... [2023-08-24 03:33:38,384 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 03:33:38,385 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 03:33:38,385 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 03:33:38,385 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 03:33:38,386 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:33:38" (1/1) ... [2023-08-24 03:33:38,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 03:33:38,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:33:38,434 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 03:33:38,464 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 03:33:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 03:33:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 03:33:38,475 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 03:33:38,476 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 03:33:38,476 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 03:33:38,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 03:33:38,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 03:33:38,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 03:33:38,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 03:33:38,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 03:33:38,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 03:33:38,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 03:33:38,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 03:33:38,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 03:33:38,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 03:33:38,481 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 03:33:38,588 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 03:33:38,589 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 03:33:38,804 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 03:33:38,902 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 03:33:38,902 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 03:33:38,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:33:38 BoogieIcfgContainer [2023-08-24 03:33:38,904 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 03:33:38,906 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 03:33:38,907 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 03:33:38,909 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 03:33:38,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 03:33:38" (1/3) ... [2023-08-24 03:33:38,910 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59712cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:33:38, skipping insertion in model container [2023-08-24 03:33:38,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:33:38" (2/3) ... [2023-08-24 03:33:38,910 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59712cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:33:38, skipping insertion in model container [2023-08-24 03:33:38,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:33:38" (3/3) ... [2023-08-24 03:33:38,911 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-08-24 03:33:38,927 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 03:33:38,928 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 03:33:38,928 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 03:33:38,996 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 03:33:39,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 128 transitions, 272 flow [2023-08-24 03:33:39,130 INFO L124 PetriNetUnfolderBase]: 11/126 cut-off events. [2023-08-24 03:33:39,130 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 03:33:39,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 11/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-24 03:33:39,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 128 transitions, 272 flow [2023-08-24 03:33:39,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 118 transitions, 248 flow [2023-08-24 03:33:39,144 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 03:33:39,155 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 118 transitions, 248 flow [2023-08-24 03:33:39,158 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 118 transitions, 248 flow [2023-08-24 03:33:39,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 118 transitions, 248 flow [2023-08-24 03:33:39,198 INFO L124 PetriNetUnfolderBase]: 11/118 cut-off events. [2023-08-24 03:33:39,198 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 03:33:39,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 11/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-24 03:33:39,201 INFO L119 LiptonReduction]: Number of co-enabled transitions 792 [2023-08-24 03:33:43,370 INFO L134 LiptonReduction]: Checked pairs total: 860 [2023-08-24 03:33:43,370 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-08-24 03:33:43,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 03:33:43,386 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;@6fdbe35e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 03:33:43,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 03:33:43,391 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 03:33:43,391 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-08-24 03:33:43,391 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 03:33:43,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:33:43,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:33:43,392 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 03:33:43,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:33:43,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1271432657, now seen corresponding path program 1 times [2023-08-24 03:33:43,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:33:43,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864816285] [2023-08-24 03:33:43,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:33:43,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:33:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:33:43,816 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 03:33:43,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:33:43,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864816285] [2023-08-24 03:33:43,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864816285] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:33:43,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:33:43,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 03:33:43,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181172048] [2023-08-24 03:33:43,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:33:43,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 03:33:43,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:33:43,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 03:33:43,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 03:33:43,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 252 [2023-08-24 03:33:43,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:43,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:33:43,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 252 [2023-08-24 03:33:43,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:33:43,922 INFO L124 PetriNetUnfolderBase]: 64/113 cut-off events. [2023-08-24 03:33:43,922 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-24 03:33:43,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 113 events. 64/113 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 329 event pairs, 13 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 162. Up to 66 conditions per place. [2023-08-24 03:33:43,925 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 19 selfloop transitions, 2 changer transitions 4/26 dead transitions. [2023-08-24 03:33:43,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2023-08-24 03:33:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 03:33:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 03:33:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-24 03:33:43,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748677248677249 [2023-08-24 03:33:43,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-24 03:33:43,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-24 03:33:43,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:33:43,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-24 03:33:43,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:43,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:43,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:43,959 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 3 states and 359 transitions. [2023-08-24 03:33:43,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2023-08-24 03:33:43,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 03:33:43,963 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 48 flow [2023-08-24 03:33:43,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-08-24 03:33:43,967 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-24 03:33:43,967 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 48 flow [2023-08-24 03:33:43,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:43,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:33:43,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:33:43,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 03:33:43,968 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 03:33:43,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:33:43,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1087178636, now seen corresponding path program 1 times [2023-08-24 03:33:43,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:33:43,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650183523] [2023-08-24 03:33:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:33:43,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:33:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:33:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:33:44,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:33:44,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650183523] [2023-08-24 03:33:44,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650183523] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:33:44,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:33:44,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 03:33:44,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627659663] [2023-08-24 03:33:44,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:33:44,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 03:33:44,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:33:44,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 03:33:44,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 03:33:44,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 252 [2023-08-24 03:33:44,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:44,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:33:44,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 252 [2023-08-24 03:33:44,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:33:44,219 INFO L124 PetriNetUnfolderBase]: 48/96 cut-off events. [2023-08-24 03:33:44,220 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-24 03:33:44,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 96 events. 48/96 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 231 event pairs, 15 based on Foata normal form. 6/81 useless extension candidates. Maximal degree in co-relation 123. Up to 66 conditions per place. [2023-08-24 03:33:44,221 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 16 selfloop transitions, 2 changer transitions 5/24 dead transitions. [2023-08-24 03:33:44,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 110 flow [2023-08-24 03:33:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 03:33:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 03:33:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-24 03:33:44,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2023-08-24 03:33:44,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-24 03:33:44,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-24 03:33:44,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:33:44,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-24 03:33:44,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:44,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:44,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:44,228 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 48 flow. Second operand 3 states and 338 transitions. [2023-08-24 03:33:44,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 110 flow [2023-08-24 03:33:44,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 03:33:44,229 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 58 flow [2023-08-24 03:33:44,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, 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=3, PETRI_FLOW=58, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-08-24 03:33:44,230 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2023-08-24 03:33:44,230 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 58 flow [2023-08-24 03:33:44,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:44,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:33:44,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:33:44,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 03:33:44,231 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 03:33:44,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:33:44,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1050120391, now seen corresponding path program 1 times [2023-08-24 03:33:44,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:33:44,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69315680] [2023-08-24 03:33:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:33:44,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:33:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:33:44,359 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 03:33:44,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:33:44,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69315680] [2023-08-24 03:33:44,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69315680] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:33:44,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:33:44,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 03:33:44,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220941528] [2023-08-24 03:33:44,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:33:44,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 03:33:44,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:33:44,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 03:33:44,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 03:33:44,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 252 [2023-08-24 03:33:44,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:44,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:33:44,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 252 [2023-08-24 03:33:44,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:33:44,428 INFO L124 PetriNetUnfolderBase]: 57/126 cut-off events. [2023-08-24 03:33:44,429 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-24 03:33:44,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 57/126 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 390 event pairs, 40 based on Foata normal form. 4/126 useless extension candidates. Maximal degree in co-relation 202. Up to 95 conditions per place. [2023-08-24 03:33:44,430 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 16 selfloop transitions, 2 changer transitions 10/29 dead transitions. [2023-08-24 03:33:44,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 140 flow [2023-08-24 03:33:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 03:33:44,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 03:33:44,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 415 transitions. [2023-08-24 03:33:44,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117063492063492 [2023-08-24 03:33:44,432 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 415 transitions. [2023-08-24 03:33:44,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 415 transitions. [2023-08-24 03:33:44,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:33:44,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 415 transitions. [2023-08-24 03:33:44,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:44,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:44,437 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:44,437 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 58 flow. Second operand 4 states and 415 transitions. [2023-08-24 03:33:44,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 140 flow [2023-08-24 03:33:44,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 03:33:44,439 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 70 flow [2023-08-24 03:33:44,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-08-24 03:33:44,440 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-24 03:33:44,443 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 70 flow [2023-08-24 03:33:44,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:44,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:33:44,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:33:44,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 03:33:44,444 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 03:33:44,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:33:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash -278733434, now seen corresponding path program 1 times [2023-08-24 03:33:44,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:33:44,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375567927] [2023-08-24 03:33:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:33:44,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:33:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:33:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:33:45,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:33:45,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375567927] [2023-08-24 03:33:45,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375567927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:33:45,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736639424] [2023-08-24 03:33:45,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:33:45,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:33:45,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:33:45,121 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 03:33:45,131 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 03:33:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:33:45,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 03:33:45,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:33:45,355 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 03:33:45,414 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 03:33:45,451 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 03:33:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:33:45,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:33:45,982 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~back~0) (let ((.cse2 (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= (+ c_~sum~0 (select .cse0 .cse1)) 1) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse3 .cse2) 1)) (<= 0 (+ c_~sum~0 (select .cse3 .cse1)))))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0)) is different from false [2023-08-24 03:33:46,014 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:33:46,014 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 62 treesize of output 50 [2023-08-24 03:33:46,035 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:33:46,035 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 316 treesize of output 292 [2023-08-24 03:33:46,053 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:33:46,054 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 96 treesize of output 92 [2023-08-24 03:33:46,069 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:33:46,069 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 95 treesize of output 79 [2023-08-24 03:33:46,267 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:33:46,267 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 62 treesize of output 50 [2023-08-24 03:33:46,278 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 03:33:46,278 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 148 treesize of output 136 [2023-08-24 03:33:46,293 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 03:33:46,293 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 132 treesize of output 112 [2023-08-24 03:33:46,310 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 03:33:46,310 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 83 treesize of output 75 [2023-08-24 03:33:46,368 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 03:33:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 03:33:46,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736639424] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:33:46,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:33:46,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-24 03:33:46,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586288827] [2023-08-24 03:33:46,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:33:46,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 03:33:46,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:33:46,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 03:33:46,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=332, Unknown=3, NotChecked=38, Total=462 [2023-08-24 03:33:46,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 03:33:46,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 70 flow. Second operand has 22 states, 22 states have (on average 71.95454545454545) internal successors, (1583), 22 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:46,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:33:46,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 03:33:46,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:33:48,313 INFO L124 PetriNetUnfolderBase]: 261/507 cut-off events. [2023-08-24 03:33:48,313 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2023-08-24 03:33:48,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1222 conditions, 507 events. 261/507 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2265 event pairs, 30 based on Foata normal form. 5/508 useless extension candidates. Maximal degree in co-relation 1206. Up to 114 conditions per place. [2023-08-24 03:33:48,318 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 58 selfloop transitions, 29 changer transitions 58/145 dead transitions. [2023-08-24 03:33:48,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 145 transitions, 713 flow [2023-08-24 03:33:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 03:33:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 03:33:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1758 transitions. [2023-08-24 03:33:48,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3033126293995859 [2023-08-24 03:33:48,325 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1758 transitions. [2023-08-24 03:33:48,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1758 transitions. [2023-08-24 03:33:48,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:33:48,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1758 transitions. [2023-08-24 03:33:48,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 76.43478260869566) internal successors, (1758), 23 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:48,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 252.0) internal successors, (6048), 24 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:48,342 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 252.0) internal successors, (6048), 24 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:48,344 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 70 flow. Second operand 23 states and 1758 transitions. [2023-08-24 03:33:48,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 145 transitions, 713 flow [2023-08-24 03:33:48,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 145 transitions, 701 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-24 03:33:48,354 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 285 flow [2023-08-24 03:33:48,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=285, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-08-24 03:33:48,355 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-08-24 03:33:48,356 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 285 flow [2023-08-24 03:33:48,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.95454545454545) internal successors, (1583), 22 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:48,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:33:48,357 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:33:48,365 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 03:33:48,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:33:48,562 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 03:33:48,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:33:48,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1005614065, now seen corresponding path program 2 times [2023-08-24 03:33:48,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:33:48,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526419893] [2023-08-24 03:33:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:33:48,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:33:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:33:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:33:48,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:33:48,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526419893] [2023-08-24 03:33:48,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526419893] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:33:48,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865389295] [2023-08-24 03:33:48,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:33:48,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:33:48,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:33:48,759 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 03:33:48,770 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 03:33:48,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:33:48,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:33:48,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:33:48,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:33:48,916 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 118 treesize of output 86 [2023-08-24 03:33:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:33:48,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:33:49,048 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 128 treesize of output 96 [2023-08-24 03:33:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:33:49,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865389295] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:33:49,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:33:49,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 11 [2023-08-24 03:33:49,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603233818] [2023-08-24 03:33:49,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:33:49,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 03:33:49,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:33:49,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 03:33:49,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-08-24 03:33:49,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 252 [2023-08-24 03:33:49,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 285 flow. Second operand has 12 states, 12 states have (on average 96.16666666666667) internal successors, (1154), 12 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:49,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:33:49,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 252 [2023-08-24 03:33:49,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:33:49,296 INFO L124 PetriNetUnfolderBase]: 357/707 cut-off events. [2023-08-24 03:33:49,296 INFO L125 PetriNetUnfolderBase]: For 1305/1307 co-relation queries the response was YES. [2023-08-24 03:33:49,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2288 conditions, 707 events. 357/707 cut-off events. For 1305/1307 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3549 event pairs, 80 based on Foata normal form. 24/713 useless extension candidates. Maximal degree in co-relation 1935. Up to 181 conditions per place. [2023-08-24 03:33:49,299 INFO L140 encePairwiseOnDemand]: 247/252 looper letters, 57 selfloop transitions, 23 changer transitions 5/89 dead transitions. [2023-08-24 03:33:49,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 89 transitions, 656 flow [2023-08-24 03:33:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 03:33:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 03:33:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 901 transitions. [2023-08-24 03:33:49,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972663139329806 [2023-08-24 03:33:49,303 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 901 transitions. [2023-08-24 03:33:49,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 901 transitions. [2023-08-24 03:33:49,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:33:49,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 901 transitions. [2023-08-24 03:33:49,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 100.11111111111111) internal successors, (901), 9 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:49,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:49,309 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:49,309 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 285 flow. Second operand 9 states and 901 transitions. [2023-08-24 03:33:49,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 89 transitions, 656 flow [2023-08-24 03:33:49,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 89 transitions, 608 flow, removed 22 selfloop flow, removed 3 redundant places. [2023-08-24 03:33:49,318 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 367 flow [2023-08-24 03:33:49,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=367, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2023-08-24 03:33:49,320 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 38 predicate places. [2023-08-24 03:33:49,321 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 367 flow [2023-08-24 03:33:49,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 96.16666666666667) internal successors, (1154), 12 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:49,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:33:49,321 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:33:49,329 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 03:33:49,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:33:49,526 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 03:33:49,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:33:49,527 INFO L85 PathProgramCache]: Analyzing trace with hash -210133493, now seen corresponding path program 3 times [2023-08-24 03:33:49,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:33:49,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094727914] [2023-08-24 03:33:49,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:33:49,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:33:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:33:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 03:33:49,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:33:49,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094727914] [2023-08-24 03:33:49,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094727914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:33:49,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393245642] [2023-08-24 03:33:49,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:33:49,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:33:49,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:33:49,660 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 03:33:49,663 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 03:33:49,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 03:33:49,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:33:49,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 03:33:49,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:33:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:33:49,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:33:50,112 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 03:33:50,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393245642] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:33:50,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:33:50,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-08-24 03:33:50,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092667088] [2023-08-24 03:33:50,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:33:50,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 03:33:50,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:33:50,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 03:33:50,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-08-24 03:33:50,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 252 [2023-08-24 03:33:50,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 367 flow. Second operand has 16 states, 16 states have (on average 95.6875) internal successors, (1531), 16 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:50,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:33:50,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 252 [2023-08-24 03:33:50,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:33:50,329 INFO L124 PetriNetUnfolderBase]: 229/473 cut-off events. [2023-08-24 03:33:50,329 INFO L125 PetriNetUnfolderBase]: For 1004/1006 co-relation queries the response was YES. [2023-08-24 03:33:50,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1575 conditions, 473 events. 229/473 cut-off events. For 1004/1006 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2205 event pairs, 148 based on Foata normal form. 12/468 useless extension candidates. Maximal degree in co-relation 1536. Up to 389 conditions per place. [2023-08-24 03:33:50,331 INFO L140 encePairwiseOnDemand]: 247/252 looper letters, 32 selfloop transitions, 3 changer transitions 25/63 dead transitions. [2023-08-24 03:33:50,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 451 flow [2023-08-24 03:33:50,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 03:33:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 03:33:50,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 694 transitions. [2023-08-24 03:33:50,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3934240362811791 [2023-08-24 03:33:50,334 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 694 transitions. [2023-08-24 03:33:50,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 694 transitions. [2023-08-24 03:33:50,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:33:50,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 694 transitions. [2023-08-24 03:33:50,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 99.14285714285714) internal successors, (694), 7 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:50,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 252.0) internal successors, (2016), 8 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:50,339 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 252.0) internal successors, (2016), 8 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:50,339 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 367 flow. Second operand 7 states and 694 transitions. [2023-08-24 03:33:50,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 451 flow [2023-08-24 03:33:50,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 63 transitions, 416 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-24 03:33:50,343 INFO L231 Difference]: Finished difference. Result has 52 places, 38 transitions, 228 flow [2023-08-24 03:33:50,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=228, PETRI_PLACES=52, PETRI_TRANSITIONS=38} [2023-08-24 03:33:50,344 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-08-24 03:33:50,344 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 38 transitions, 228 flow [2023-08-24 03:33:50,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 95.6875) internal successors, (1531), 16 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:50,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:33:50,345 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:33:50,356 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 03:33:50,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:33:50,550 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 03:33:50,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:33:50,551 INFO L85 PathProgramCache]: Analyzing trace with hash 794494887, now seen corresponding path program 4 times [2023-08-24 03:33:50,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:33:50,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552016980] [2023-08-24 03:33:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:33:50,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:33:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:33:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:33:51,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:33:51,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552016980] [2023-08-24 03:33:51,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552016980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:33:51,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581213908] [2023-08-24 03:33:51,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:33:51,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:33:51,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:33:51,644 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 03:33:51,647 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 03:33:51,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:33:51,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:33:51,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 03:33:51,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:33:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:33:52,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:33:52,533 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:33:52,534 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 216 treesize of output 170 [2023-08-24 03:33:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:33:53,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581213908] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:33:53,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:33:53,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 25 [2023-08-24 03:33:53,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144097180] [2023-08-24 03:33:53,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:33:53,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 03:33:53,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:33:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 03:33:53,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2023-08-24 03:33:53,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 03:33:53,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 38 transitions, 228 flow. Second operand has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:53,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:33:53,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 03:33:53,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:33:54,112 INFO L124 PetriNetUnfolderBase]: 364/719 cut-off events. [2023-08-24 03:33:54,112 INFO L125 PetriNetUnfolderBase]: For 823/823 co-relation queries the response was YES. [2023-08-24 03:33:54,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2159 conditions, 719 events. 364/719 cut-off events. For 823/823 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3539 event pairs, 65 based on Foata normal form. 26/744 useless extension candidates. Maximal degree in co-relation 2134. Up to 186 conditions per place. [2023-08-24 03:33:54,115 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 67 selfloop transitions, 26 changer transitions 55/148 dead transitions. [2023-08-24 03:33:54,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 148 transitions, 903 flow [2023-08-24 03:33:54,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 03:33:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 03:33:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1681 transitions. [2023-08-24 03:33:54,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.333531746031746 [2023-08-24 03:33:54,122 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1681 transitions. [2023-08-24 03:33:54,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1681 transitions. [2023-08-24 03:33:54,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:33:54,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1681 transitions. [2023-08-24 03:33:54,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 84.05) internal successors, (1681), 20 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:54,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 252.0) internal successors, (5292), 21 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:54,133 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 252.0) internal successors, (5292), 21 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:54,133 INFO L175 Difference]: Start difference. First operand has 52 places, 38 transitions, 228 flow. Second operand 20 states and 1681 transitions. [2023-08-24 03:33:54,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 148 transitions, 903 flow [2023-08-24 03:33:54,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 148 transitions, 869 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-24 03:33:54,140 INFO L231 Difference]: Finished difference. Result has 66 places, 52 transitions, 417 flow [2023-08-24 03:33:54,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=417, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2023-08-24 03:33:54,141 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 46 predicate places. [2023-08-24 03:33:54,141 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 417 flow [2023-08-24 03:33:54,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:54,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:33:54,142 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:33:54,148 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 03:33:54,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:33:54,348 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 03:33:54,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:33:54,349 INFO L85 PathProgramCache]: Analyzing trace with hash -840518697, now seen corresponding path program 5 times [2023-08-24 03:33:54,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:33:54,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705829171] [2023-08-24 03:33:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:33:54,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:33:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:33:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:33:55,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:33:55,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705829171] [2023-08-24 03:33:55,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705829171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:33:55,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594958570] [2023-08-24 03:33:55,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:33:55,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:33:55,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:33:55,179 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 03:33:55,205 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 03:33:55,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:33:55,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:33:55,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 03:33:55,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:33:55,382 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 03:33:55,419 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 03:33:55,458 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 03:33:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:33:55,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:33:56,635 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:33:56,636 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 123 treesize of output 87 [2023-08-24 03:33:56,670 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-08-24 03:33:56,670 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 562 treesize of output 520 [2023-08-24 03:33:56,682 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:33:56,694 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:33:56,694 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 180 treesize of output 180 [2023-08-24 03:33:56,729 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-08-24 03:33:56,729 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 179 treesize of output 153 [2023-08-24 03:33:57,307 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:33:57,308 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 123 treesize of output 87 [2023-08-24 03:33:57,327 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 03:33:57,328 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 562 treesize of output 502 [2023-08-24 03:33:57,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:33:57,341 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:33:57,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:33:57,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 154 [2023-08-24 03:33:57,360 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 03:33:57,361 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 179 treesize of output 135 [2023-08-24 03:33:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:33:57,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594958570] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:33:57,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:33:57,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2023-08-24 03:33:57,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560976817] [2023-08-24 03:33:57,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:33:57,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 03:33:57,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:33:57,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 03:33:57,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=553, Unknown=2, NotChecked=0, Total=756 [2023-08-24 03:33:57,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 03:33:57,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 417 flow. Second operand has 28 states, 28 states have (on average 71.75) internal successors, (2009), 28 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:57,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:33:57,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 03:33:57,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:34:00,207 INFO L124 PetriNetUnfolderBase]: 762/1486 cut-off events. [2023-08-24 03:34:00,207 INFO L125 PetriNetUnfolderBase]: For 3156/3156 co-relation queries the response was YES. [2023-08-24 03:34:00,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5084 conditions, 1486 events. 762/1486 cut-off events. For 3156/3156 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8476 event pairs, 70 based on Foata normal form. 25/1508 useless extension candidates. Maximal degree in co-relation 4610. Up to 300 conditions per place. [2023-08-24 03:34:00,215 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 87 selfloop transitions, 66 changer transitions 78/231 dead transitions. [2023-08-24 03:34:00,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 231 transitions, 1685 flow [2023-08-24 03:34:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 03:34:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 03:34:00,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2375 transitions. [2023-08-24 03:34:00,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3040194572452637 [2023-08-24 03:34:00,225 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2375 transitions. [2023-08-24 03:34:00,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2375 transitions. [2023-08-24 03:34:00,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:34:00,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2375 transitions. [2023-08-24 03:34:00,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 76.61290322580645) internal successors, (2375), 31 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:00,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 252.0) internal successors, (8064), 32 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:00,242 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 252.0) internal successors, (8064), 32 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:00,243 INFO L175 Difference]: Start difference. First operand has 66 places, 52 transitions, 417 flow. Second operand 31 states and 2375 transitions. [2023-08-24 03:34:00,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 231 transitions, 1685 flow [2023-08-24 03:34:00,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 231 transitions, 1594 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-08-24 03:34:00,259 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 1048 flow [2023-08-24 03:34:00,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1048, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2023-08-24 03:34:00,261 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 79 predicate places. [2023-08-24 03:34:00,261 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 1048 flow [2023-08-24 03:34:00,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.75) internal successors, (2009), 28 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:00,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:34:00,263 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:34:00,271 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 03:34:00,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:34:00,468 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 03:34:00,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:34:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash -484179071, now seen corresponding path program 6 times [2023-08-24 03:34:00,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:34:00,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782820211] [2023-08-24 03:34:00,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:34:00,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:34:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:34:01,317 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 03:34:01,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:34:01,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782820211] [2023-08-24 03:34:01,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782820211] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:34:01,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575071739] [2023-08-24 03:34:01,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:34:01,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:34:01,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:34:01,319 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 03:34:01,322 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 03:34:01,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 03:34:01,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:34:01,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 03:34:01,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:34:01,604 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 03:34:01,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:34:01,676 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:34:01,676 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 68 treesize of output 44 [2023-08-24 03:34:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 03:34:01,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575071739] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:34:01,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:34:01,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 20 [2023-08-24 03:34:01,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679966137] [2023-08-24 03:34:01,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:34:01,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 03:34:01,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:34:01,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 03:34:01,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-08-24 03:34:01,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 03:34:01,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 1048 flow. Second operand has 22 states, 22 states have (on average 79.22727272727273) internal successors, (1743), 22 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:01,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:34:01,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 03:34:01,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:34:02,366 INFO L124 PetriNetUnfolderBase]: 838/1622 cut-off events. [2023-08-24 03:34:02,366 INFO L125 PetriNetUnfolderBase]: For 6230/6230 co-relation queries the response was YES. [2023-08-24 03:34:02,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6130 conditions, 1622 events. 838/1622 cut-off events. For 6230/6230 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9425 event pairs, 222 based on Foata normal form. 8/1627 useless extension candidates. Maximal degree in co-relation 5819. Up to 693 conditions per place. [2023-08-24 03:34:02,377 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 78 selfloop transitions, 44 changer transitions 28/150 dead transitions. [2023-08-24 03:34:02,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 150 transitions, 1600 flow [2023-08-24 03:34:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 03:34:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 03:34:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1153 transitions. [2023-08-24 03:34:02,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3268140589569161 [2023-08-24 03:34:02,382 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1153 transitions. [2023-08-24 03:34:02,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1153 transitions. [2023-08-24 03:34:02,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:34:02,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1153 transitions. [2023-08-24 03:34:02,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 82.35714285714286) internal successors, (1153), 14 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:02,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 252.0) internal successors, (3780), 15 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:02,391 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 252.0) internal successors, (3780), 15 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:02,391 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 1048 flow. Second operand 14 states and 1153 transitions. [2023-08-24 03:34:02,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 150 transitions, 1600 flow [2023-08-24 03:34:02,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 150 transitions, 1302 flow, removed 140 selfloop flow, removed 8 redundant places. [2023-08-24 03:34:02,430 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 963 flow [2023-08-24 03:34:02,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=963, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2023-08-24 03:34:02,431 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 85 predicate places. [2023-08-24 03:34:02,431 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 963 flow [2023-08-24 03:34:02,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 79.22727272727273) internal successors, (1743), 22 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:02,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:34:02,432 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:34:02,440 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 03:34:02,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:34:02,638 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 03:34:02,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:34:02,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1932319888, now seen corresponding path program 7 times [2023-08-24 03:34:02,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:34:02,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267366919] [2023-08-24 03:34:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:34:02,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:34:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:34:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:34:02,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:34:02,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267366919] [2023-08-24 03:34:02,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267366919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:34:02,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64899209] [2023-08-24 03:34:02,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:34:02,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:34:02,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:34:02,867 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 03:34:02,893 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 03:34:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:34:02,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 03:34:02,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:34:03,084 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:34:03,084 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 158 treesize of output 108 [2023-08-24 03:34:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:34:03,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:34:03,309 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 03:34:03,310 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 174 treesize of output 126 [2023-08-24 03:34:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:34:03,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64899209] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:34:03,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:34:03,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 6] total 17 [2023-08-24 03:34:03,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210318056] [2023-08-24 03:34:03,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:34:03,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 03:34:03,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:34:03,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 03:34:03,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-24 03:34:03,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 252 [2023-08-24 03:34:03,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 963 flow. Second operand has 18 states, 18 states have (on average 87.5) internal successors, (1575), 18 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:03,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:34:03,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 252 [2023-08-24 03:34:03,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:34:04,025 INFO L124 PetriNetUnfolderBase]: 1032/1992 cut-off events. [2023-08-24 03:34:04,025 INFO L125 PetriNetUnfolderBase]: For 4813/4817 co-relation queries the response was YES. [2023-08-24 03:34:04,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6699 conditions, 1992 events. 1032/1992 cut-off events. For 4813/4817 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12444 event pairs, 179 based on Foata normal form. 32/2012 useless extension candidates. Maximal degree in co-relation 6669. Up to 544 conditions per place. [2023-08-24 03:34:04,038 INFO L140 encePairwiseOnDemand]: 247/252 looper letters, 78 selfloop transitions, 55 changer transitions 65/202 dead transitions. [2023-08-24 03:34:04,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 202 transitions, 1922 flow [2023-08-24 03:34:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 03:34:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 03:34:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1655 transitions. [2023-08-24 03:34:04,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3648589065255732 [2023-08-24 03:34:04,044 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1655 transitions. [2023-08-24 03:34:04,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1655 transitions. [2023-08-24 03:34:04,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:34:04,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1655 transitions. [2023-08-24 03:34:04,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 91.94444444444444) internal successors, (1655), 18 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:04,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 252.0) internal successors, (4788), 19 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:04,066 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 252.0) internal successors, (4788), 19 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:04,067 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 963 flow. Second operand 18 states and 1655 transitions. [2023-08-24 03:34:04,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 202 transitions, 1922 flow [2023-08-24 03:34:04,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 202 transitions, 1792 flow, removed 35 selfloop flow, removed 17 redundant places. [2023-08-24 03:34:04,088 INFO L231 Difference]: Finished difference. Result has 104 places, 102 transitions, 1144 flow [2023-08-24 03:34:04,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1144, PETRI_PLACES=104, PETRI_TRANSITIONS=102} [2023-08-24 03:34:04,089 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 84 predicate places. [2023-08-24 03:34:04,089 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 102 transitions, 1144 flow [2023-08-24 03:34:04,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 87.5) internal successors, (1575), 18 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:04,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:34:04,090 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:34:04,099 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 03:34:04,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:34:04,300 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 03:34:04,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:34:04,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1926316929, now seen corresponding path program 8 times [2023-08-24 03:34:04,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:34:04,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130789575] [2023-08-24 03:34:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:34:04,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:34:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:34:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:05,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:34:05,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130789575] [2023-08-24 03:34:05,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130789575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:34:05,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913730892] [2023-08-24 03:34:05,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:34:05,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:34:05,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:34:05,241 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 03:34:05,267 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 03:34:05,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:34:05,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:34:05,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 03:34:05,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:34:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:05,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:34:06,186 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:34:06,186 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 236 treesize of output 190 [2023-08-24 03:34:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:06,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913730892] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:34:06,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:34:06,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-24 03:34:06,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088806963] [2023-08-24 03:34:06,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:34:06,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 03:34:06,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:34:06,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 03:34:06,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2023-08-24 03:34:06,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 03:34:06,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 102 transitions, 1144 flow. Second operand has 30 states, 30 states have (on average 78.73333333333333) internal successors, (2362), 30 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:06,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:34:06,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 03:34:06,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:34:09,208 INFO L124 PetriNetUnfolderBase]: 1693/3174 cut-off events. [2023-08-24 03:34:09,209 INFO L125 PetriNetUnfolderBase]: For 10128/10128 co-relation queries the response was YES. [2023-08-24 03:34:09,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11994 conditions, 3174 events. 1693/3174 cut-off events. For 10128/10128 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21033 event pairs, 188 based on Foata normal form. 14/3188 useless extension candidates. Maximal degree in co-relation 11968. Up to 857 conditions per place. [2023-08-24 03:34:09,231 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 172 selfloop transitions, 124 changer transitions 107/403 dead transitions. [2023-08-24 03:34:09,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 403 transitions, 3805 flow [2023-08-24 03:34:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 03:34:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 03:34:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3300 transitions. [2023-08-24 03:34:09,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33577533577533575 [2023-08-24 03:34:09,237 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3300 transitions. [2023-08-24 03:34:09,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3300 transitions. [2023-08-24 03:34:09,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:34:09,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3300 transitions. [2023-08-24 03:34:09,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 84.61538461538461) internal successors, (3300), 39 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:09,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 252.0) internal successors, (10080), 40 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:09,252 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 252.0) internal successors, (10080), 40 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:09,252 INFO L175 Difference]: Start difference. First operand has 104 places, 102 transitions, 1144 flow. Second operand 39 states and 3300 transitions. [2023-08-24 03:34:09,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 403 transitions, 3805 flow [2023-08-24 03:34:09,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 403 transitions, 3455 flow, removed 166 selfloop flow, removed 10 redundant places. [2023-08-24 03:34:09,308 INFO L231 Difference]: Finished difference. Result has 130 places, 179 transitions, 2453 flow [2023-08-24 03:34:09,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=1046, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2453, PETRI_PLACES=130, PETRI_TRANSITIONS=179} [2023-08-24 03:34:09,309 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 110 predicate places. [2023-08-24 03:34:09,309 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 179 transitions, 2453 flow [2023-08-24 03:34:09,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 78.73333333333333) internal successors, (2362), 30 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:09,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:34:09,310 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:34:09,321 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 03:34:09,516 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,SelfDestructingSolverStorable10 [2023-08-24 03:34:09,516 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 03:34:09,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:34:09,516 INFO L85 PathProgramCache]: Analyzing trace with hash -631472656, now seen corresponding path program 9 times [2023-08-24 03:34:09,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:34:09,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787760810] [2023-08-24 03:34:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:34:09,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:34:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:34:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:10,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:34:10,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787760810] [2023-08-24 03:34:10,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787760810] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:34:10,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419013606] [2023-08-24 03:34:10,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:34:10,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:34:10,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:34:10,841 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 03:34:10,859 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 03:34:11,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 03:34:11,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:34:11,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 03:34:11,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:34:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:11,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:34:12,034 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 03:34:12,035 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 284 treesize of output 250 [2023-08-24 03:34:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:13,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419013606] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:34:13,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:34:13,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-08-24 03:34:13,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232382023] [2023-08-24 03:34:13,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:34:13,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 03:34:13,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:34:13,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 03:34:13,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2023-08-24 03:34:13,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 03:34:13,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 179 transitions, 2453 flow. Second operand has 38 states, 38 states have (on average 78.57894736842105) internal successors, (2986), 38 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:13,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:34:13,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 03:34:13,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:34:18,039 INFO L124 PetriNetUnfolderBase]: 2539/4776 cut-off events. [2023-08-24 03:34:18,040 INFO L125 PetriNetUnfolderBase]: For 27711/27711 co-relation queries the response was YES. [2023-08-24 03:34:18,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20780 conditions, 4776 events. 2539/4776 cut-off events. For 27711/27711 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34015 event pairs, 380 based on Foata normal form. 75/4851 useless extension candidates. Maximal degree in co-relation 20740. Up to 1197 conditions per place. [2023-08-24 03:34:18,085 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 269 selfloop transitions, 164 changer transitions 144/577 dead transitions. [2023-08-24 03:34:18,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 577 transitions, 6506 flow [2023-08-24 03:34:18,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-24 03:34:18,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-24 03:34:18,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4408 transitions. [2023-08-24 03:34:18,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3363858363858364 [2023-08-24 03:34:18,092 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4408 transitions. [2023-08-24 03:34:18,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4408 transitions. [2023-08-24 03:34:18,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:34:18,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4408 transitions. [2023-08-24 03:34:18,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 84.76923076923077) internal successors, (4408), 52 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:18,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 252.0) internal successors, (13356), 53 states have internal predecessors, (13356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:18,121 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 252.0) internal successors, (13356), 53 states have internal predecessors, (13356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:18,121 INFO L175 Difference]: Start difference. First operand has 130 places, 179 transitions, 2453 flow. Second operand 52 states and 4408 transitions. [2023-08-24 03:34:18,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 577 transitions, 6506 flow [2023-08-24 03:34:18,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 577 transitions, 6016 flow, removed 229 selfloop flow, removed 7 redundant places. [2023-08-24 03:34:18,257 INFO L231 Difference]: Finished difference. Result has 196 places, 248 transitions, 3845 flow [2023-08-24 03:34:18,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=1963, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=3845, PETRI_PLACES=196, PETRI_TRANSITIONS=248} [2023-08-24 03:34:18,258 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 176 predicate places. [2023-08-24 03:34:18,258 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 248 transitions, 3845 flow [2023-08-24 03:34:18,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 78.57894736842105) internal successors, (2986), 38 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:18,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:34:18,259 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:34:18,266 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 03:34:18,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:34:18,466 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 03:34:18,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:34:18,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1380428386, now seen corresponding path program 10 times [2023-08-24 03:34:18,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:34:18,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025021645] [2023-08-24 03:34:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:34:18,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:34:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:34:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:20,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:34:20,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025021645] [2023-08-24 03:34:20,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025021645] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:34:20,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976009848] [2023-08-24 03:34:20,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:34:20,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:34:20,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:34:20,050 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 03:34:20,068 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 03:34:20,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:34:20,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:34:20,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-24 03:34:20,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:34:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:20,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:34:21,048 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 03:34:21,049 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 284 treesize of output 250 [2023-08-24 03:34:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:22,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976009848] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:34:22,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:34:22,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2023-08-24 03:34:22,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758570692] [2023-08-24 03:34:22,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:34:22,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 03:34:22,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:34:22,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 03:34:22,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2023-08-24 03:34:22,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 03:34:22,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 248 transitions, 3845 flow. Second operand has 36 states, 36 states have (on average 71.61111111111111) internal successors, (2578), 36 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:22,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:34:22,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 03:34:22,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:34:25,760 INFO L124 PetriNetUnfolderBase]: 3459/6454 cut-off events. [2023-08-24 03:34:25,761 INFO L125 PetriNetUnfolderBase]: For 98411/98411 co-relation queries the response was YES. [2023-08-24 03:34:25,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35228 conditions, 6454 events. 3459/6454 cut-off events. For 98411/98411 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 47152 event pairs, 648 based on Foata normal form. 8/6462 useless extension candidates. Maximal degree in co-relation 35165. Up to 1870 conditions per place. [2023-08-24 03:34:25,811 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 227 selfloop transitions, 206 changer transitions 99/532 dead transitions. [2023-08-24 03:34:25,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 532 transitions, 7819 flow [2023-08-24 03:34:25,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 03:34:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 03:34:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2700 transitions. [2023-08-24 03:34:25,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30612244897959184 [2023-08-24 03:34:25,815 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2700 transitions. [2023-08-24 03:34:25,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2700 transitions. [2023-08-24 03:34:25,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:34:25,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2700 transitions. [2023-08-24 03:34:25,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 77.14285714285714) internal successors, (2700), 35 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:25,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 252.0) internal successors, (9072), 36 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:25,827 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 252.0) internal successors, (9072), 36 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:25,827 INFO L175 Difference]: Start difference. First operand has 196 places, 248 transitions, 3845 flow. Second operand 35 states and 2700 transitions. [2023-08-24 03:34:25,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 532 transitions, 7819 flow [2023-08-24 03:34:26,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 532 transitions, 6819 flow, removed 472 selfloop flow, removed 20 redundant places. [2023-08-24 03:34:26,376 INFO L231 Difference]: Finished difference. Result has 217 places, 322 transitions, 5088 flow [2023-08-24 03:34:26,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5088, PETRI_PLACES=217, PETRI_TRANSITIONS=322} [2023-08-24 03:34:26,377 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-08-24 03:34:26,377 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 322 transitions, 5088 flow [2023-08-24 03:34:26,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 71.61111111111111) internal successors, (2578), 36 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:26,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:34:26,378 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:34:26,384 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 03:34:26,583 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,SelfDestructingSolverStorable12 [2023-08-24 03:34:26,584 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 03:34:26,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:34:26,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2123255324, now seen corresponding path program 11 times [2023-08-24 03:34:26,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:34:26,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358335995] [2023-08-24 03:34:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:34:26,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:34:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:34:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:27,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:34:27,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358335995] [2023-08-24 03:34:27,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358335995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:34:27,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533860002] [2023-08-24 03:34:27,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:34:27,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:34:27,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:34:27,933 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 03:34:27,960 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 03:34:28,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 03:34:28,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:34:28,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-24 03:34:28,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:34:28,319 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 03:34:28,371 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 03:34:28,416 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 03:34:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:28,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:34:30,066 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:34:30,066 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 182 treesize of output 122 [2023-08-24 03:34:30,132 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 03:34:30,132 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 376 treesize of output 378 [2023-08-24 03:34:30,188 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 03:34:30,188 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 324 treesize of output 298 [2023-08-24 03:34:30,307 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 03:34:30,307 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 215 treesize of output 229 [2023-08-24 03:34:33,421 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:34:33,422 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 182 treesize of output 122 [2023-08-24 03:34:33,453 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 03:34:33,454 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 376 treesize of output 336 [2023-08-24 03:34:33,491 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 03:34:33,492 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 324 treesize of output 256 [2023-08-24 03:34:33,527 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 03:34:33,528 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 215 treesize of output 187 [2023-08-24 03:34:33,648 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 03:34:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:33,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533860002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:34:33,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:34:33,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-24 03:34:33,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211572661] [2023-08-24 03:34:33,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:34:33,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 03:34:33,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:34:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 03:34:33,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1126, Unknown=6, NotChecked=0, Total=1482 [2023-08-24 03:34:33,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 03:34:33,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 322 transitions, 5088 flow. Second operand has 39 states, 39 states have (on average 71.56410256410257) internal successors, (2791), 39 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:33,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:34:33,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 03:34:33,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:34:38,579 INFO L124 PetriNetUnfolderBase]: 3885/7241 cut-off events. [2023-08-24 03:34:38,580 INFO L125 PetriNetUnfolderBase]: For 140681/140681 co-relation queries the response was YES. [2023-08-24 03:34:38,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40289 conditions, 7241 events. 3885/7241 cut-off events. For 140681/140681 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 54240 event pairs, 1350 based on Foata normal form. 12/7253 useless extension candidates. Maximal degree in co-relation 40220. Up to 5546 conditions per place. [2023-08-24 03:34:38,632 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 326 selfloop transitions, 108 changer transitions 102/536 dead transitions. [2023-08-24 03:34:38,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 536 transitions, 7635 flow [2023-08-24 03:34:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 03:34:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 03:34:38,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2900 transitions. [2023-08-24 03:34:38,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3028404344193818 [2023-08-24 03:34:38,636 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2900 transitions. [2023-08-24 03:34:38,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2900 transitions. [2023-08-24 03:34:38,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:34:38,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2900 transitions. [2023-08-24 03:34:38,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 76.3157894736842) internal successors, (2900), 38 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:38,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 252.0) internal successors, (9828), 39 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:38,647 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 252.0) internal successors, (9828), 39 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:38,647 INFO L175 Difference]: Start difference. First operand has 217 places, 322 transitions, 5088 flow. Second operand 38 states and 2900 transitions. [2023-08-24 03:34:38,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 536 transitions, 7635 flow [2023-08-24 03:34:39,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 536 transitions, 7264 flow, removed 123 selfloop flow, removed 20 redundant places. [2023-08-24 03:34:39,477 INFO L231 Difference]: Finished difference. Result has 247 places, 370 transitions, 5944 flow [2023-08-24 03:34:39,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=4761, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5944, PETRI_PLACES=247, PETRI_TRANSITIONS=370} [2023-08-24 03:34:39,477 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-08-24 03:34:39,477 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 370 transitions, 5944 flow [2023-08-24 03:34:39,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 71.56410256410257) internal successors, (2791), 39 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:39,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:34:39,478 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:34:39,486 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 03:34:39,683 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,SelfDestructingSolverStorable13 [2023-08-24 03:34:39,683 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 03:34:39,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:34:39,684 INFO L85 PathProgramCache]: Analyzing trace with hash -120658482, now seen corresponding path program 12 times [2023-08-24 03:34:39,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:34:39,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901443231] [2023-08-24 03:34:39,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:34:39,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:34:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:34:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:41,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:34:41,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901443231] [2023-08-24 03:34:41,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901443231] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:34:41,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054693394] [2023-08-24 03:34:41,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:34:41,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:34:41,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:34:41,448 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 03:34:41,450 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 03:34:41,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 03:34:41,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:34:41,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 03:34:41,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:34:41,795 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 03:34:41,843 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 03:34:41,873 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 03:34:42,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:34:42,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:34:42,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:34:42,231 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:34:42,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:34:42,233 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:34:42,237 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:34:42,237 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 24 [2023-08-24 03:34:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:42,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:34:44,429 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:34:44,429 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 180 treesize of output 120 [2023-08-24 03:34:44,489 INFO L322 Elim1Store]: treesize reduction 54, result has 50.5 percent of original size [2023-08-24 03:34:44,490 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 368 treesize of output 372 [2023-08-24 03:34:44,548 INFO L322 Elim1Store]: treesize reduction 54, result has 50.5 percent of original size [2023-08-24 03:34:44,549 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 318 treesize of output 296 [2023-08-24 03:34:44,611 INFO L322 Elim1Store]: treesize reduction 54, result has 50.5 percent of original size [2023-08-24 03:34:44,611 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 213 treesize of output 229 [2023-08-24 03:34:47,246 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:34:47,247 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 180 treesize of output 120 [2023-08-24 03:34:47,283 INFO L322 Elim1Store]: treesize reduction 96, result has 11.9 percent of original size [2023-08-24 03:34:47,284 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 776 treesize of output 688 [2023-08-24 03:34:47,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:34:47,309 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:34:47,309 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:34:47,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:34:47,311 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:34:47,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:34:47,312 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 216 [2023-08-24 03:34:47,347 INFO L322 Elim1Store]: treesize reduction 96, result has 11.9 percent of original size [2023-08-24 03:34:47,348 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 251 treesize of output 187 [2023-08-24 03:34:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:47,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054693394] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:34:47,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:34:47,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-24 03:34:47,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275716771] [2023-08-24 03:34:47,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:34:47,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 03:34:47,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:34:47,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 03:34:47,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1216, Unknown=4, NotChecked=0, Total=1560 [2023-08-24 03:34:47,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 03:34:47,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 370 transitions, 5944 flow. Second operand has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:47,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:34:47,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 03:34:47,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:35:03,222 INFO L124 PetriNetUnfolderBase]: 4745/8862 cut-off events. [2023-08-24 03:35:03,222 INFO L125 PetriNetUnfolderBase]: For 211353/211353 co-relation queries the response was YES. [2023-08-24 03:35:03,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52411 conditions, 8862 events. 4745/8862 cut-off events. For 211353/211353 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 67707 event pairs, 876 based on Foata normal form. 93/8955 useless extension candidates. Maximal degree in co-relation 52329. Up to 3769 conditions per place. [2023-08-24 03:35:03,302 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 286 selfloop transitions, 242 changer transitions 146/674 dead transitions. [2023-08-24 03:35:03,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 674 transitions, 10211 flow [2023-08-24 03:35:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-24 03:35:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-24 03:35:03,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3540 transitions. [2023-08-24 03:35:03,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3053830227743271 [2023-08-24 03:35:03,307 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3540 transitions. [2023-08-24 03:35:03,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3540 transitions. [2023-08-24 03:35:03,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:35:03,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3540 transitions. [2023-08-24 03:35:03,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 76.95652173913044) internal successors, (3540), 46 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:03,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 252.0) internal successors, (11844), 47 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:03,320 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 252.0) internal successors, (11844), 47 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:03,320 INFO L175 Difference]: Start difference. First operand has 247 places, 370 transitions, 5944 flow. Second operand 46 states and 3540 transitions. [2023-08-24 03:35:03,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 674 transitions, 10211 flow [2023-08-24 03:35:04,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 674 transitions, 9281 flow, removed 405 selfloop flow, removed 29 redundant places. [2023-08-24 03:35:04,291 INFO L231 Difference]: Finished difference. Result has 280 places, 443 transitions, 7962 flow [2023-08-24 03:35:04,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=7962, PETRI_PLACES=280, PETRI_TRANSITIONS=443} [2023-08-24 03:35:04,292 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 260 predicate places. [2023-08-24 03:35:04,292 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 443 transitions, 7962 flow [2023-08-24 03:35:04,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:04,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:35:04,293 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:35:04,299 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 03:35:04,493 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,SelfDestructingSolverStorable14 [2023-08-24 03:35:04,493 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 03:35:04,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:35:04,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1137524077, now seen corresponding path program 13 times [2023-08-24 03:35:04,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:35:04,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704514002] [2023-08-24 03:35:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:35:04,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:35:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:35:06,170 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 03:35:06,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:35:06,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704514002] [2023-08-24 03:35:06,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704514002] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:35:06,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023255338] [2023-08-24 03:35:06,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:35:06,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:35:06,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:35:06,172 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 03:35:06,173 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 03:35:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:35:06,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 03:35:06,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:35:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:35:06,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:35:07,039 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 03:35:07,039 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 264 treesize of output 230 [2023-08-24 03:35:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 03:35:07,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023255338] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:35:07,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:35:07,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 31 [2023-08-24 03:35:07,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453681962] [2023-08-24 03:35:07,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:35:07,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 03:35:07,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:35:07,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 03:35:07,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 03:35:07,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 03:35:07,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 443 transitions, 7962 flow. Second operand has 33 states, 33 states have (on average 78.84848484848484) internal successors, (2602), 33 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:07,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:35:07,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 03:35:07,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:35:11,108 INFO L124 PetriNetUnfolderBase]: 5579/10352 cut-off events. [2023-08-24 03:35:11,108 INFO L125 PetriNetUnfolderBase]: For 223408/223408 co-relation queries the response was YES. [2023-08-24 03:35:11,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59042 conditions, 10352 events. 5579/10352 cut-off events. For 223408/223408 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 79781 event pairs, 1250 based on Foata normal form. 48/10400 useless extension candidates. Maximal degree in co-relation 58943. Up to 5186 conditions per place. [2023-08-24 03:35:11,192 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 347 selfloop transitions, 248 changer transitions 114/709 dead transitions. [2023-08-24 03:35:11,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 709 transitions, 12303 flow [2023-08-24 03:35:11,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 03:35:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 03:35:11,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2780 transitions. [2023-08-24 03:35:11,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342953342953343 [2023-08-24 03:35:11,196 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2780 transitions. [2023-08-24 03:35:11,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2780 transitions. [2023-08-24 03:35:11,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:35:11,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2780 transitions. [2023-08-24 03:35:11,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 84.24242424242425) internal successors, (2780), 33 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:11,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 252.0) internal successors, (8568), 34 states have internal predecessors, (8568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:11,205 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 252.0) internal successors, (8568), 34 states have internal predecessors, (8568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:11,205 INFO L175 Difference]: Start difference. First operand has 280 places, 443 transitions, 7962 flow. Second operand 33 states and 2780 transitions. [2023-08-24 03:35:11,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 709 transitions, 12303 flow [2023-08-24 03:35:12,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 709 transitions, 10850 flow, removed 665 selfloop flow, removed 24 redundant places. [2023-08-24 03:35:12,464 INFO L231 Difference]: Finished difference. Result has 299 places, 521 transitions, 9350 flow [2023-08-24 03:35:12,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=6856, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=9350, PETRI_PLACES=299, PETRI_TRANSITIONS=521} [2023-08-24 03:35:12,466 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 279 predicate places. [2023-08-24 03:35:12,466 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 521 transitions, 9350 flow [2023-08-24 03:35:12,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 78.84848484848484) internal successors, (2602), 33 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:12,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:35:12,467 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:35:12,477 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 03:35:12,677 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,SelfDestructingSolverStorable15 [2023-08-24 03:35:12,677 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 03:35:12,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:35:12,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1786684284, now seen corresponding path program 14 times [2023-08-24 03:35:12,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:35:12,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161199166] [2023-08-24 03:35:12,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:35:12,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:35:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:35:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:35:14,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:35:14,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161199166] [2023-08-24 03:35:14,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161199166] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:35:14,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217388765] [2023-08-24 03:35:14,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:35:14,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:35:14,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:35:14,196 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 03:35:14,199 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 03:35:14,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:35:14,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:35:14,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-24 03:35:14,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:35:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:35:14,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:35:15,481 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 03:35:15,481 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 284 treesize of output 250 [2023-08-24 03:35:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:35:16,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217388765] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:35:16,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:35:16,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 42 [2023-08-24 03:35:16,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614470211] [2023-08-24 03:35:16,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:35:16,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-24 03:35:16,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:35:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-24 03:35:16,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2023-08-24 03:35:16,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 03:35:16,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 521 transitions, 9350 flow. Second operand has 44 states, 44 states have (on average 71.52272727272727) internal successors, (3147), 44 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:16,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:35:16,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 03:35:16,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:35:44,572 INFO L124 PetriNetUnfolderBase]: 26306/48216 cut-off events. [2023-08-24 03:35:44,573 INFO L125 PetriNetUnfolderBase]: For 1352975/1352975 co-relation queries the response was YES. [2023-08-24 03:35:45,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333357 conditions, 48216 events. 26306/48216 cut-off events. For 1352975/1352975 co-relation queries the response was YES. Maximal size of possible extension queue 1920. Compared 456134 event pairs, 1436 based on Foata normal form. 282/48498 useless extension candidates. Maximal degree in co-relation 333246. Up to 13989 conditions per place. [2023-08-24 03:35:45,642 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 581 selfloop transitions, 1979 changer transitions 386/2946 dead transitions. [2023-08-24 03:35:45,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 2946 transitions, 57450 flow [2023-08-24 03:35:45,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-08-24 03:35:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2023-08-24 03:35:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 11185 transitions. [2023-08-24 03:35:45,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3103840603840604 [2023-08-24 03:35:45,661 INFO L72 ComplementDD]: Start complementDD. Operand 143 states and 11185 transitions. [2023-08-24 03:35:45,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 143 states and 11185 transitions. [2023-08-24 03:35:45,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:35:45,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 143 states and 11185 transitions. [2023-08-24 03:35:45,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 144 states, 143 states have (on average 78.21678321678321) internal successors, (11185), 143 states have internal predecessors, (11185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:45,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 144 states, 144 states have (on average 252.0) internal successors, (36288), 144 states have internal predecessors, (36288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:45,714 INFO L81 ComplementDD]: Finished complementDD. Result has 144 states, 144 states have (on average 252.0) internal successors, (36288), 144 states have internal predecessors, (36288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:45,714 INFO L175 Difference]: Start difference. First operand has 299 places, 521 transitions, 9350 flow. Second operand 143 states and 11185 transitions. [2023-08-24 03:35:45,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 2946 transitions, 57450 flow [2023-08-24 03:35:50,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 2946 transitions, 54337 flow, removed 1439 selfloop flow, removed 21 redundant places. [2023-08-24 03:35:50,969 INFO L231 Difference]: Finished difference. Result has 505 places, 2126 transitions, 50014 flow [2023-08-24 03:35:50,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=8681, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=143, PETRI_FLOW=50014, PETRI_PLACES=505, PETRI_TRANSITIONS=2126} [2023-08-24 03:35:50,970 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 485 predicate places. [2023-08-24 03:35:50,971 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 2126 transitions, 50014 flow [2023-08-24 03:35:50,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 71.52272727272727) internal successors, (3147), 44 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:50,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:35:50,988 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:35:50,994 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 03:35:51,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:35:51,193 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 03:35:51,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:35:51,194 INFO L85 PathProgramCache]: Analyzing trace with hash 383970864, now seen corresponding path program 15 times [2023-08-24 03:35:51,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:35:51,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880692222] [2023-08-24 03:35:51,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:35:51,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:35:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:35:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:35:52,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:35:52,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880692222] [2023-08-24 03:35:52,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880692222] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:35:52,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355586040] [2023-08-24 03:35:52,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:35:52,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:35:52,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:35:52,438 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 03:35:52,440 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 03:35:52,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 03:35:52,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:35:52,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-24 03:35:52,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:35:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:35:53,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:35:53,900 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 03:35:53,901 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 284 treesize of output 250 [2023-08-24 03:35:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:35:55,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355586040] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:35:55,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:35:55,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-24 03:35:55,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876501637] [2023-08-24 03:35:55,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:35:55,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 03:35:55,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:35:55,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 03:35:55,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1518, Unknown=0, NotChecked=0, Total=1806 [2023-08-24 03:35:55,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 03:35:55,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 2126 transitions, 50014 flow. Second operand has 43 states, 43 states have (on average 78.53488372093024) internal successors, (3377), 43 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:55,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:35:55,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 03:35:55,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:37:08,740 INFO L124 PetriNetUnfolderBase]: 48387/88745 cut-off events. [2023-08-24 03:37:08,740 INFO L125 PetriNetUnfolderBase]: For 6263825/6263825 co-relation queries the response was YES. [2023-08-24 03:37:12,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717239 conditions, 88745 events. 48387/88745 cut-off events. For 6263825/6263825 co-relation queries the response was YES. Maximal size of possible extension queue 3753. Compared 918662 event pairs, 16408 based on Foata normal form. 604/89349 useless extension candidates. Maximal degree in co-relation 717049. Up to 42929 conditions per place. [2023-08-24 03:37:12,638 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 2865 selfloop transitions, 2116 changer transitions 469/5450 dead transitions. [2023-08-24 03:37:12,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 5450 transitions, 154237 flow [2023-08-24 03:37:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2023-08-24 03:37:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2023-08-24 03:37:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 14855 transitions. [2023-08-24 03:37:12,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33878398102536034 [2023-08-24 03:37:12,648 INFO L72 ComplementDD]: Start complementDD. Operand 174 states and 14855 transitions. [2023-08-24 03:37:12,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 174 states and 14855 transitions. [2023-08-24 03:37:12,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:37:12,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 174 states and 14855 transitions. [2023-08-24 03:37:12,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 175 states, 174 states have (on average 85.3735632183908) internal successors, (14855), 174 states have internal predecessors, (14855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:37:12,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 175 states, 175 states have (on average 252.0) internal successors, (44100), 175 states have internal predecessors, (44100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:37:12,707 INFO L81 ComplementDD]: Finished complementDD. Result has 175 states, 175 states have (on average 252.0) internal successors, (44100), 175 states have internal predecessors, (44100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:37:12,707 INFO L175 Difference]: Start difference. First operand has 505 places, 2126 transitions, 50014 flow. Second operand 174 states and 14855 transitions. [2023-08-24 03:37:12,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 5450 transitions, 154237 flow [2023-08-24 03:38:13,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 5450 transitions, 97613 flow, removed 28286 selfloop flow, removed 14 redundant places. [2023-08-24 03:38:13,590 INFO L231 Difference]: Finished difference. Result has 766 places, 4023 transitions, 75801 flow [2023-08-24 03:38:13,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=33839, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=554, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=174, PETRI_FLOW=75801, PETRI_PLACES=766, PETRI_TRANSITIONS=4023} [2023-08-24 03:38:13,593 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 746 predicate places. [2023-08-24 03:38:13,593 INFO L495 AbstractCegarLoop]: Abstraction has has 766 places, 4023 transitions, 75801 flow [2023-08-24 03:38:13,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 78.53488372093024) internal successors, (3377), 43 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:38:13,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:38:13,593 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:38:13,599 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 03:38:13,794 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,SelfDestructingSolverStorable17 [2023-08-24 03:38:13,794 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 03:38:13,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:38:13,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1902098650, now seen corresponding path program 16 times [2023-08-24 03:38:13,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:38:13,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739557524] [2023-08-24 03:38:13,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:38:13,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:38:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:38:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 03:38:14,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:38:14,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739557524] [2023-08-24 03:38:14,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739557524] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:38:14,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411024104] [2023-08-24 03:38:14,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:38:14,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:38:14,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:38:14,113 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 03:38:14,143 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 03:38:14,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:38:14,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:38:14,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 03:38:14,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:38:14,437 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:38:14,437 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 226 treesize of output 140 [2023-08-24 03:38:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-24 03:38:14,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:38:14,733 INFO L322 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-24 03:38:14,734 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 260 treesize of output 176 [2023-08-24 03:38:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 03:38:14,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411024104] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:38:14,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:38:14,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 18 [2023-08-24 03:38:14,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852798457] [2023-08-24 03:38:14,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:38:14,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 03:38:14,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:38:14,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 03:38:14,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2023-08-24 03:38:14,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 252 [2023-08-24 03:38:14,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 4023 transitions, 75801 flow. Second operand has 19 states, 19 states have (on average 97.52631578947368) internal successors, (1853), 19 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:38:14,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:38:14,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 252 [2023-08-24 03:38:14,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:40:00,206 INFO L124 PetriNetUnfolderBase]: 50979/93696 cut-off events. [2023-08-24 03:40:00,206 INFO L125 PetriNetUnfolderBase]: For 7817428/7817428 co-relation queries the response was YES. [2023-08-24 03:40:07,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535146 conditions, 93696 events. 50979/93696 cut-off events. For 7817428/7817428 co-relation queries the response was YES. Maximal size of possible extension queue 4132. Compared 981744 event pairs, 17730 based on Foata normal form. 156/93852 useless extension candidates. Maximal degree in co-relation 534853. Up to 73331 conditions per place. [2023-08-24 03:40:07,396 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 3365 selfloop transitions, 1095 changer transitions 15/4475 dead transitions. [2023-08-24 03:40:07,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 4475 transitions, 97677 flow [2023-08-24 03:40:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 03:40:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 03:40:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1967 transitions. [2023-08-24 03:40:07,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108187134502924 [2023-08-24 03:40:07,398 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1967 transitions. [2023-08-24 03:40:07,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1967 transitions. [2023-08-24 03:40:07,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:40:07,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1967 transitions. [2023-08-24 03:40:07,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 103.52631578947368) internal successors, (1967), 19 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:40:07,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 252.0) internal successors, (5040), 20 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:40:07,404 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 252.0) internal successors, (5040), 20 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:40:07,404 INFO L175 Difference]: Start difference. First operand has 766 places, 4023 transitions, 75801 flow. Second operand 19 states and 1967 transitions. [2023-08-24 03:40:07,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 770 places, 4475 transitions, 97677 flow [2023-08-24 03:41:53,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 4475 transitions, 87302 flow, removed 5132 selfloop flow, removed 30 redundant places. [2023-08-24 03:41:53,286 INFO L231 Difference]: Finished difference. Result has 748 places, 4340 transitions, 77321 flow [2023-08-24 03:41:53,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=63293, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=676, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2948, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=77321, PETRI_PLACES=748, PETRI_TRANSITIONS=4340} [2023-08-24 03:41:53,289 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 728 predicate places. [2023-08-24 03:41:53,290 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 4340 transitions, 77321 flow [2023-08-24 03:41:53,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 97.52631578947368) internal successors, (1853), 19 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:41:53,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:41:53,290 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:41:53,299 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 03:41:53,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:41:53,496 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 03:41:53,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:41:53,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1414204169, now seen corresponding path program 17 times [2023-08-24 03:41:53,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:41:53,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468455686] [2023-08-24 03:41:53,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:41:53,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:41:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:41:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:41:55,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:41:55,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468455686] [2023-08-24 03:41:55,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468455686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:41:55,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824386671] [2023-08-24 03:41:55,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:41:55,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:41:55,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:41:55,122 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 03:41:55,124 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 03:41:55,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 03:41:55,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:41:55,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-24 03:41:55,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:41:55,503 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 03:41:55,544 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 03:41:55,579 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 03:41:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:41:56,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:41:57,330 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:41:57,330 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 243 treesize of output 159 [2023-08-24 03:41:57,413 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:41:57,414 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1038 treesize of output 1050 [2023-08-24 03:41:57,529 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:41:57,529 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 340 treesize of output 438 [2023-08-24 03:41:57,646 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:41:57,647 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 339 treesize of output 383 [2023-08-24 03:42:23,294 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:42:23,295 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 243 treesize of output 159 [2023-08-24 03:42:23,337 INFO L322 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-24 03:42:23,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 494 treesize of output 440 [2023-08-24 03:42:23,384 INFO L322 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-24 03:42:23,384 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 332 [2023-08-24 03:42:23,432 INFO L322 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-24 03:42:23,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 247 [2023-08-24 03:42:23,655 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 03:42:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:42:23,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824386671] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:42:23,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:42:23,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 46 [2023-08-24 03:42:23,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392696678] [2023-08-24 03:42:23,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:42:23,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-24 03:42:23,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:42:23,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-24 03:42:23,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1851, Unknown=6, NotChecked=0, Total=2256 [2023-08-24 03:42:23,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 03:42:23,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 4340 transitions, 77321 flow. Second operand has 48 states, 48 states have (on average 71.45833333333333) internal successors, (3430), 48 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:42:23,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:42:23,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 03:42:23,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:42:26,810 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 03:44:42,076 INFO L124 PetriNetUnfolderBase]: 58931/107911 cut-off events. [2023-08-24 03:44:42,076 INFO L125 PetriNetUnfolderBase]: For 8188485/8188485 co-relation queries the response was YES. [2023-08-24 03:44:49,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600915 conditions, 107911 events. 58931/107911 cut-off events. For 8188485/8188485 co-relation queries the response was YES. Maximal size of possible extension queue 4828. Compared 1149035 event pairs, 24407 based on Foata normal form. 235/108146 useless extension candidates. Maximal degree in co-relation 600631. Up to 70972 conditions per place. [2023-08-24 03:44:49,557 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 3947 selfloop transitions, 1376 changer transitions 229/5552 dead transitions. [2023-08-24 03:44:49,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 5552 transitions, 114440 flow [2023-08-24 03:44:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-24 03:44:49,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-24 03:44:49,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 5869 transitions. [2023-08-24 03:44:49,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30644319131161235 [2023-08-24 03:44:49,563 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 5869 transitions. [2023-08-24 03:44:49,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 5869 transitions. [2023-08-24 03:44:49,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:44:49,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 5869 transitions. [2023-08-24 03:44:49,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 77.22368421052632) internal successors, (5869), 76 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:44:49,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 252.0) internal successors, (19404), 77 states have internal predecessors, (19404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:44:49,585 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 252.0) internal successors, (19404), 77 states have internal predecessors, (19404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:44:49,586 INFO L175 Difference]: Start difference. First operand has 748 places, 4340 transitions, 77321 flow. Second operand 76 states and 5869 transitions. [2023-08-24 03:44:49,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 5552 transitions, 114440 flow Received shutdown request... [2023-08-24 03:46:19,448 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 03:46:19,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 03:46:19,466 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 03:46:19,466 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 03:46:19,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:46:19,649 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-24 03:46:19,650 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 03:46:19,650 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 03:46:19,651 INFO L445 BasicCegarLoop]: Path program histogram: [17, 1, 1, 1] [2023-08-24 03:46:19,654 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 03:46:19,654 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 03:46:19,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 03:46:19 BasicIcfg [2023-08-24 03:46:19,656 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 03:46:19,656 INFO L158 Benchmark]: Toolchain (without parser) took 761645.10ms. Allocated memory was 339.7MB in the beginning and 14.4GB in the end (delta: 14.0GB). Free memory was 315.4MB in the beginning and 9.3GB in the end (delta: -9.0GB). Peak memory consumption was 8.2GB. Max. memory is 16.0GB. [2023-08-24 03:46:19,657 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 339.7MB. Free memory is still 316.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 03:46:19,657 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.38ms. Allocated memory is still 339.7MB. Free memory was 315.4MB in the beginning and 304.1MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 03:46:19,657 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.15ms. Allocated memory is still 339.7MB. Free memory was 303.6MB in the beginning and 302.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 03:46:19,657 INFO L158 Benchmark]: Boogie Preprocessor took 32.85ms. Allocated memory is still 339.7MB. Free memory was 302.0MB in the beginning and 300.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 03:46:19,657 INFO L158 Benchmark]: RCFGBuilder took 519.66ms. Allocated memory is still 339.7MB. Free memory was 300.4MB in the beginning and 278.4MB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-24 03:46:19,658 INFO L158 Benchmark]: TraceAbstraction took 760749.50ms. Allocated memory was 339.7MB in the beginning and 14.4GB in the end (delta: 14.0GB). Free memory was 277.9MB in the beginning and 9.3GB in the end (delta: -9.1GB). Peak memory consumption was 8.1GB. Max. memory is 16.0GB. [2023-08-24 03:46:19,659 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 339.7MB. Free memory is still 316.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 278.38ms. Allocated memory is still 339.7MB. Free memory was 315.4MB in the beginning and 304.1MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 55.15ms. Allocated memory is still 339.7MB. Free memory was 303.6MB in the beginning and 302.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.85ms. Allocated memory is still 339.7MB. Free memory was 302.0MB in the beginning and 300.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 519.66ms. Allocated memory is still 339.7MB. Free memory was 300.4MB in the beginning and 278.4MB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * TraceAbstraction took 760749.50ms. Allocated memory was 339.7MB in the beginning and 14.4GB in the end (delta: 14.0GB). Free memory was 277.9MB in the beginning and 9.3GB in the end (delta: -9.1GB). Peak memory consumption was 8.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.2s, 114 PlacesBefore, 20 PlacesAfterwards, 118 TransitionsBefore, 16 TransitionsAfterwards, 792 CoEnabledTransitionPairs, 6 FixpointIterations, 66 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 13 ConcurrentYvCompositions, 8 ChoiceCompositions, 124 TotalNumberOfCompositions, 860 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 851, independent: 843, independent conditional: 0, independent unconditional: 843, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 451, independent: 446, independent conditional: 0, independent unconditional: 446, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 851, independent: 397, independent conditional: 0, independent unconditional: 397, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 451, unknown conditional: 0, unknown unconditional: 451] , Statistics on independence cache: Total cache size (in pairs): 17, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 146 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 760.6s, OverallIterations: 20, TraceHistogramMax: 4, PathProgramHistogramMax: 17, EmptinessCheckTime: 0.0s, AutomataDifference: 672.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.4s, HoareTripleCheckerStatistics: 77 mSolverCounterUnknown, 5498 SdHoareTripleChecker+Valid, 22.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5498 mSDsluCounter, 156 SdHoareTripleChecker+Invalid, 20.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 140 IncrementalHoareTripleChecker+Unchecked, 142 mSDsCounter, 681 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 24739 IncrementalHoareTripleChecker+Invalid, 25637 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 681 mSolverCounterUnsat, 14 mSDtfsCounter, 24739 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1487 GetRequests, 379 SyntacticMatches, 13 SemanticMatches, 1095 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 35763 ImplicationChecksByTransitivity, 69.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77321occurred in iteration=19, InterpolantAutomatonStates: 711, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 76.1s InterpolantComputationTime, 758 NumberOfCodeBlocks, 758 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 1062 ConstructedInterpolants, 25 QuantifiedInterpolants, 28528 SizeOfPredicates, 346 NumberOfNonLiveVariables, 3613 ConjunctsInSsa, 628 ConjunctsInUnsatCore, 54 InterpolantComputations, 3 PerfectInterpolantSequences, 148/834 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown