/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/test-context1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 03:50:39,791 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 03:50:39,838 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 03:50:39,842 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 03:50:39,842 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 03:50:39,862 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 03:50:39,863 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 03:50:39,863 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 03:50:39,863 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 03:50:39,864 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 03:50:39,864 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 03:50:39,865 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 03:50:39,865 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 03:50:39,865 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 03:50:39,866 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 03:50:39,866 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 03:50:39,866 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 03:50:39,867 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 03:50:39,867 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 03:50:39,867 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 03:50:39,868 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 03:50:39,868 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 03:50:39,868 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 03:50:39,869 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 03:50:39,869 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 03:50:39,869 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 03:50:39,870 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 03:50:39,870 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 03:50:39,870 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 03:50:39,870 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 03:50:39,871 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 03:50:39,871 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 03:50:39,871 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 03:50:39,872 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 03:50:39,872 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 03:50:39,872 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 03:50:40,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 03:50:40,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 03:50:40,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 03:50:40,204 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 03:50:40,205 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 03:50:40,211 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-08-24 03:50:41,358 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 03:50:41,563 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 03:50:41,563 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-08-24 03:50:41,569 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02fad75aa/3b020f11a360452a8cb11068cda8c8ac/FLAGd3aa5712d [2023-08-24 03:50:41,581 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02fad75aa/3b020f11a360452a8cb11068cda8c8ac [2023-08-24 03:50:41,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 03:50:41,584 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 03:50:41,584 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 03:50:41,585 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 03:50:41,587 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 03:50:41,587 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:50:41" (1/1) ... [2023-08-24 03:50:41,588 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1514aaa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:50:41, skipping insertion in model container [2023-08-24 03:50:41,588 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:50:41" (1/1) ... [2023-08-24 03:50:41,607 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 03:50:41,752 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/test-context1.wvr.c[2433,2446] [2023-08-24 03:50:41,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 03:50:41,770 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 03:50:41,806 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/test-context1.wvr.c[2433,2446] [2023-08-24 03:50:41,809 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 03:50:41,816 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 03:50:41,816 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 03:50:41,824 INFO L206 MainTranslator]: Completed translation [2023-08-24 03:50:41,826 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:50:41 WrapperNode [2023-08-24 03:50:41,827 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 03:50:41,828 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 03:50:41,828 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 03:50:41,828 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 03:50:41,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:50:41" (1/1) ... [2023-08-24 03:50:41,848 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:50:41" (1/1) ... [2023-08-24 03:50:41,879 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 136 [2023-08-24 03:50:41,880 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 03:50:41,882 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 03:50:41,882 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 03:50:41,882 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 03:50:41,889 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:50:41" (1/1) ... [2023-08-24 03:50:41,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:50:41" (1/1) ... [2023-08-24 03:50:41,902 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:50:41" (1/1) ... [2023-08-24 03:50:41,903 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:50:41" (1/1) ... [2023-08-24 03:50:41,911 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:50:41" (1/1) ... [2023-08-24 03:50:41,915 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:50:41" (1/1) ... [2023-08-24 03:50:41,916 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:50:41" (1/1) ... [2023-08-24 03:50:41,917 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:50:41" (1/1) ... [2023-08-24 03:50:41,919 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 03:50:41,929 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 03:50:41,930 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 03:50:41,930 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 03:50:41,930 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:50:41" (1/1) ... [2023-08-24 03:50:41,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 03:50:41,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:50:41,962 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 03:50:41,985 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 03:50:41,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 03:50:41,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 03:50:41,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 03:50:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 03:50:41,999 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 03:50:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 03:50:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 03:50:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 03:50:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 03:50:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 03:50:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 03:50:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 03:50:42,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 03:50:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 03:50:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 03:50:42,006 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 03:50:42,118 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 03:50:42,121 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 03:50:42,337 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 03:50:42,414 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 03:50:42,415 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 03:50:42,417 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:50:42 BoogieIcfgContainer [2023-08-24 03:50:42,417 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 03:50:42,418 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 03:50:42,419 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 03:50:42,421 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 03:50:42,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 03:50:41" (1/3) ... [2023-08-24 03:50:42,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f590c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:50:42, skipping insertion in model container [2023-08-24 03:50:42,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:50:41" (2/3) ... [2023-08-24 03:50:42,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f590c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:50:42, skipping insertion in model container [2023-08-24 03:50:42,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:50:42" (3/3) ... [2023-08-24 03:50:42,423 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-08-24 03:50:42,437 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 03:50:42,438 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 03:50:42,438 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 03:50:42,480 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 03:50:42,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 111 transitions, 238 flow [2023-08-24 03:50:42,602 INFO L124 PetriNetUnfolderBase]: 9/109 cut-off events. [2023-08-24 03:50:42,603 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 03:50:42,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 109 events. 9/109 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 77. Up to 2 conditions per place. [2023-08-24 03:50:42,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 111 transitions, 238 flow [2023-08-24 03:50:42,612 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 101 transitions, 214 flow [2023-08-24 03:50:42,615 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 03:50:42,633 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 101 transitions, 214 flow [2023-08-24 03:50:42,639 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 101 transitions, 214 flow [2023-08-24 03:50:42,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 101 transitions, 214 flow [2023-08-24 03:50:42,699 INFO L124 PetriNetUnfolderBase]: 9/101 cut-off events. [2023-08-24 03:50:42,699 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 03:50:42,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 101 events. 9/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 77. Up to 2 conditions per place. [2023-08-24 03:50:42,700 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-08-24 03:50:46,081 INFO L134 LiptonReduction]: Checked pairs total: 521 [2023-08-24 03:50:46,081 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-24 03:50:46,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 03:50:46,098 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;@69c37130, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 03:50:46,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 03:50:46,101 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 03:50:46,101 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-08-24 03:50:46,102 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 03:50:46,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:50:46,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:50:46,103 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 03:50:46,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:50:46,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1454380652, now seen corresponding path program 1 times [2023-08-24 03:50:46,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:50:46,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223221865] [2023-08-24 03:50:46,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:50:46,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:50:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:50:46,529 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 03:50:46,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:50:46,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223221865] [2023-08-24 03:50:46,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223221865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:50:46,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:50:46,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 03:50:46,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297027507] [2023-08-24 03:50:46,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:50:46,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 03:50:46,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:50:46,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 03:50:46,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 03:50:46,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 213 [2023-08-24 03:50:46,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:46,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:50:46,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 213 [2023-08-24 03:50:46,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:50:46,659 INFO L124 PetriNetUnfolderBase]: 39/73 cut-off events. [2023-08-24 03:50:46,659 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-24 03:50:46,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 73 events. 39/73 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 136 event pairs, 9 based on Foata normal form. 1/50 useless extension candidates. Maximal degree in co-relation 100. Up to 37 conditions per place. [2023-08-24 03:50:46,661 INFO L140 encePairwiseOnDemand]: 208/213 looper letters, 19 selfloop transitions, 4 changer transitions 2/25 dead transitions. [2023-08-24 03:50:46,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 118 flow [2023-08-24 03:50:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 03:50:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 03:50:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2023-08-24 03:50:46,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42018779342723006 [2023-08-24 03:50:46,679 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 358 transitions. [2023-08-24 03:50:46,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 358 transitions. [2023-08-24 03:50:46,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:50:46,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 358 transitions. [2023-08-24 03:50:46,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:46,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:46,690 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:46,691 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 4 states and 358 transitions. [2023-08-24 03:50:46,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 118 flow [2023-08-24 03:50:46,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 03:50:46,695 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 62 flow [2023-08-24 03:50:46,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-24 03:50:46,699 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-08-24 03:50:46,699 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 62 flow [2023-08-24 03:50:46,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:46,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:50:46,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:50:46,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 03:50:46,700 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 03:50:46,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:50:46,708 INFO L85 PathProgramCache]: Analyzing trace with hash 386774676, now seen corresponding path program 1 times [2023-08-24 03:50:46,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:50:46,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999331112] [2023-08-24 03:50:46,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:50:46,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:50:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:50:46,771 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 03:50:46,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:50:46,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999331112] [2023-08-24 03:50:46,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999331112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:50:46,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:50:46,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 03:50:46,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832163802] [2023-08-24 03:50:46,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:50:46,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 03:50:46,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:50:46,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 03:50:46,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 03:50:46,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 213 [2023-08-24 03:50:46,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:46,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:50:46,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 213 [2023-08-24 03:50:46,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:50:46,828 INFO L124 PetriNetUnfolderBase]: 53/104 cut-off events. [2023-08-24 03:50:46,829 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-24 03:50:46,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 104 events. 53/104 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 263 event pairs, 17 based on Foata normal form. 6/92 useless extension candidates. Maximal degree in co-relation 222. Up to 74 conditions per place. [2023-08-24 03:50:46,831 INFO L140 encePairwiseOnDemand]: 210/213 looper letters, 20 selfloop transitions, 2 changer transitions 5/27 dead transitions. [2023-08-24 03:50:46,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 27 transitions, 137 flow [2023-08-24 03:50:46,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 03:50:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 03:50:46,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2023-08-24 03:50:46,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945226917057903 [2023-08-24 03:50:46,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2023-08-24 03:50:46,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2023-08-24 03:50:46,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:50:46,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2023-08-24 03:50:46,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:46,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:46,842 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:46,843 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 62 flow. Second operand 3 states and 316 transitions. [2023-08-24 03:50:46,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 27 transitions, 137 flow [2023-08-24 03:50:46,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 27 transitions, 133 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 03:50:46,844 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 70 flow [2023-08-24 03:50:46,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=19, 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=3, PETRI_FLOW=70, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2023-08-24 03:50:46,845 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 3 predicate places. [2023-08-24 03:50:46,846 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 70 flow [2023-08-24 03:50:46,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:46,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:50:46,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:50:46,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 03:50:46,848 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 03:50:46,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:50:46,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1733181605, now seen corresponding path program 1 times [2023-08-24 03:50:46,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:50:46,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212813182] [2023-08-24 03:50:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:50:46,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:50:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:50:47,049 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 03:50:47,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:50:47,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212813182] [2023-08-24 03:50:47,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212813182] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:50:47,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:50:47,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 03:50:47,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969853618] [2023-08-24 03:50:47,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:50:47,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 03:50:47,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:50:47,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 03:50:47,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 03:50:47,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 213 [2023-08-24 03:50:47,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 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 03:50:47,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:50:47,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 213 [2023-08-24 03:50:47,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:50:47,122 INFO L124 PetriNetUnfolderBase]: 61/130 cut-off events. [2023-08-24 03:50:47,123 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-24 03:50:47,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 130 events. 61/130 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 367 event pairs, 44 based on Foata normal form. 6/135 useless extension candidates. Maximal degree in co-relation 244. Up to 103 conditions per place. [2023-08-24 03:50:47,124 INFO L140 encePairwiseOnDemand]: 209/213 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2023-08-24 03:50:47,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 148 flow [2023-08-24 03:50:47,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 03:50:47,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 03:50:47,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 351 transitions. [2023-08-24 03:50:47,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119718309859155 [2023-08-24 03:50:47,127 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 351 transitions. [2023-08-24 03:50:47,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 351 transitions. [2023-08-24 03:50:47,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:50:47,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 351 transitions. [2023-08-24 03:50:47,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:47,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:47,130 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:47,131 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 70 flow. Second operand 4 states and 351 transitions. [2023-08-24 03:50:47,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 148 flow [2023-08-24 03:50:47,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 28 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 03:50:47,133 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 68 flow [2023-08-24 03:50:47,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-24 03:50:47,134 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 6 predicate places. [2023-08-24 03:50:47,136 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 68 flow [2023-08-24 03:50:47,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 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 03:50:47,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:50:47,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:50:47,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 03:50:47,138 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 03:50:47,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:50:47,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1234736965, now seen corresponding path program 1 times [2023-08-24 03:50:47,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:50:47,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129362194] [2023-08-24 03:50:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:50:47,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:50:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:50:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:50:47,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:50:47,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129362194] [2023-08-24 03:50:47,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129362194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:50:47,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519173344] [2023-08-24 03:50:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:50:47,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:50:47,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:50:47,581 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 03:50:47,612 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 03:50:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:50:47,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 03:50:47,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:50:47,819 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 03:50:47,863 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 03:50:47,900 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 03:50:47,976 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:50:47,978 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:50:47,979 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 17 treesize of output 10 [2023-08-24 03:50:47,992 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 03:50:47,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:50:48,102 WARN L839 $PredicateComparison]: unable to prove that (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|)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select .cse0 (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (= 5 (select .cse0 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) is different from false [2023-08-24 03:50:48,118 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:50:48,118 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 63 treesize of output 51 [2023-08-24 03:50:48,134 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 03:50:48,135 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 324 treesize of output 289 [2023-08-24 03:50:48,158 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:50:48,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 86 [2023-08-24 03:50:48,169 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 03:50:48,170 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 97 treesize of output 67 [2023-08-24 03:50:48,196 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 03:50:48,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519173344] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:50:48,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:50:48,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2023-08-24 03:50:48,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064469425] [2023-08-24 03:50:48,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:50:48,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 03:50:48,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:50:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 03:50:48,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=4, NotChecked=22, Total=182 [2023-08-24 03:50:48,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 213 [2023-08-24 03:50:48,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 68 flow. Second operand has 14 states, 14 states have (on average 70.14285714285714) internal successors, (982), 14 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:48,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:50:48,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 213 [2023-08-24 03:50:48,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:50:48,288 WARN L839 $PredicateComparison]: unable to prove that (and (<= c_~front~0 0) (forall ((v_ArrVal_73 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select .cse0 (+ (* c_~size~0 4) c_~queue~0.offset .cse1)))) (= 5 (select .cse0 (+ c_~queue~0.offset .cse1)))))) (= c_~queue~0.offset 0) (= 5 c_~x~0) (= 5 (select (select |c_#memory_int| c_~queue~0.base) 0)) (< 0 (+ c_~front~0 1))) is different from false [2023-08-24 03:50:48,452 INFO L124 PetriNetUnfolderBase]: 136/258 cut-off events. [2023-08-24 03:50:48,453 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-08-24 03:50:48,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 258 events. 136/258 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 946 event pairs, 21 based on Foata normal form. 1/258 useless extension candidates. Maximal degree in co-relation 638. Up to 79 conditions per place. [2023-08-24 03:50:48,458 INFO L140 encePairwiseOnDemand]: 203/213 looper letters, 39 selfloop transitions, 16 changer transitions 14/69 dead transitions. [2023-08-24 03:50:48,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 69 transitions, 351 flow [2023-08-24 03:50:48,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 03:50:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 03:50:48,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 681 transitions. [2023-08-24 03:50:48,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35524256651017216 [2023-08-24 03:50:48,461 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 681 transitions. [2023-08-24 03:50:48,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 681 transitions. [2023-08-24 03:50:48,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:50:48,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 681 transitions. [2023-08-24 03:50:48,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 75.66666666666667) internal successors, (681), 9 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:48,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 213.0) internal successors, (2130), 10 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:48,468 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 213.0) internal successors, (2130), 10 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:48,468 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 68 flow. Second operand 9 states and 681 transitions. [2023-08-24 03:50:48,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 69 transitions, 351 flow [2023-08-24 03:50:48,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 69 transitions, 345 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-24 03:50:48,471 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 177 flow [2023-08-24 03:50:48,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=177, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2023-08-24 03:50:48,474 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 13 predicate places. [2023-08-24 03:50:48,478 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 177 flow [2023-08-24 03:50:48,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.14285714285714) internal successors, (982), 14 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:48,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:50:48,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:50:48,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 03:50:48,687 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 03:50:48,687 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 03:50:48,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:50:48,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1689317805, now seen corresponding path program 2 times [2023-08-24 03:50:48,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:50:48,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415956472] [2023-08-24 03:50:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:50:48,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:50:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:50:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:50:49,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:50:49,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415956472] [2023-08-24 03:50:49,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415956472] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:50:49,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346485393] [2023-08-24 03:50:49,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:50:49,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:50:49,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:50:49,113 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 03:50:49,136 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 03:50:49,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:50:49,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:50:49,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 03:50:49,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:50:49,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:50:49,288 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 03:50:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:50:49,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:50:49,399 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:50:49,400 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2023-08-24 03:50:49,405 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-24 03:50:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:50:49,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346485393] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:50:49,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:50:49,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-24 03:50:49,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893693012] [2023-08-24 03:50:49,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:50:49,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 03:50:49,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:50:49,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 03:50:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2023-08-24 03:50:49,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 213 [2023-08-24 03:50:49,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 177 flow. Second operand has 14 states, 14 states have (on average 79.35714285714286) internal successors, (1111), 14 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:49,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:50:49,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 213 [2023-08-24 03:50:49,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:50:49,605 INFO L124 PetriNetUnfolderBase]: 148/276 cut-off events. [2023-08-24 03:50:49,605 INFO L125 PetriNetUnfolderBase]: For 283/283 co-relation queries the response was YES. [2023-08-24 03:50:49,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 987 conditions, 276 events. 148/276 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1034 event pairs, 21 based on Foata normal form. 1/276 useless extension candidates. Maximal degree in co-relation 963. Up to 173 conditions per place. [2023-08-24 03:50:49,607 INFO L140 encePairwiseOnDemand]: 209/213 looper letters, 35 selfloop transitions, 9 changer transitions 9/53 dead transitions. [2023-08-24 03:50:49,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 370 flow [2023-08-24 03:50:49,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 03:50:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 03:50:49,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 426 transitions. [2023-08-24 03:50:49,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-08-24 03:50:49,609 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 426 transitions. [2023-08-24 03:50:49,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 426 transitions. [2023-08-24 03:50:49,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:50:49,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 426 transitions. [2023-08-24 03:50:49,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.2) internal successors, (426), 5 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:49,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:49,615 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:49,615 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 177 flow. Second operand 5 states and 426 transitions. [2023-08-24 03:50:49,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 370 flow [2023-08-24 03:50:49,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 354 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-24 03:50:49,622 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 196 flow [2023-08-24 03:50:49,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-24 03:50:49,624 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 16 predicate places. [2023-08-24 03:50:49,626 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 196 flow [2023-08-24 03:50:49,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 79.35714285714286) internal successors, (1111), 14 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:49,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:50:49,627 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:50:49,639 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 03:50:49,833 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 03:50:49,833 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 03:50:49,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:50:49,834 INFO L85 PathProgramCache]: Analyzing trace with hash 260453689, now seen corresponding path program 3 times [2023-08-24 03:50:49,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:50:49,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488204272] [2023-08-24 03:50:49,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:50:49,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:50:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:50:49,885 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 03:50:49,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:50:49,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488204272] [2023-08-24 03:50:49,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488204272] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:50:49,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213481165] [2023-08-24 03:50:49,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:50:49,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:50:49,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:50:49,887 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 03:50:49,890 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 03:50:49,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 03:50:49,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:50:49,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 03:50:49,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:50:49,987 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 03:50:49,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:50:50,006 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 03:50:50,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213481165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:50:50,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:50:50,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-24 03:50:50,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217469492] [2023-08-24 03:50:50,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:50:50,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 03:50:50,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:50:50,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 03:50:50,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 03:50:50,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 213 [2023-08-24 03:50:50,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:50,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:50:50,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 213 [2023-08-24 03:50:50,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:50:50,089 INFO L124 PetriNetUnfolderBase]: 248/479 cut-off events. [2023-08-24 03:50:50,089 INFO L125 PetriNetUnfolderBase]: For 941/941 co-relation queries the response was YES. [2023-08-24 03:50:50,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1728 conditions, 479 events. 248/479 cut-off events. For 941/941 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2108 event pairs, 80 based on Foata normal form. 18/496 useless extension candidates. Maximal degree in co-relation 1703. Up to 306 conditions per place. [2023-08-24 03:50:50,091 INFO L140 encePairwiseOnDemand]: 210/213 looper letters, 40 selfloop transitions, 12 changer transitions 3/55 dead transitions. [2023-08-24 03:50:50,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 55 transitions, 436 flow [2023-08-24 03:50:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 03:50:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 03:50:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2023-08-24 03:50:50,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4988262910798122 [2023-08-24 03:50:50,093 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 425 transitions. [2023-08-24 03:50:50,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 425 transitions. [2023-08-24 03:50:50,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:50:50,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 425 transitions. [2023-08-24 03:50:50,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:50,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:50,097 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:50,097 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 196 flow. Second operand 4 states and 425 transitions. [2023-08-24 03:50:50,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 55 transitions, 436 flow [2023-08-24 03:50:50,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 55 transitions, 407 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-24 03:50:50,101 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 278 flow [2023-08-24 03:50:50,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=278, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2023-08-24 03:50:50,101 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 18 predicate places. [2023-08-24 03:50:50,102 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 278 flow [2023-08-24 03:50:50,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:50,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:50:50,102 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:50:50,110 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 03:50:50,308 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 03:50:50,308 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 03:50:50,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:50:50,309 INFO L85 PathProgramCache]: Analyzing trace with hash -516883814, now seen corresponding path program 4 times [2023-08-24 03:50:50,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:50:50,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644894336] [2023-08-24 03:50:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:50:50,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:50:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:50:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:50:50,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:50:50,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644894336] [2023-08-24 03:50:50,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644894336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:50:50,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709062574] [2023-08-24 03:50:50,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:50:50,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:50:50,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:50:50,486 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 03:50:50,512 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 03:50:50,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:50:50,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:50:50,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 03:50:50,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:50:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:50:50,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:50:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:50:50,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709062574] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:50:50,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:50:50,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-24 03:50:50,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071406434] [2023-08-24 03:50:50,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:50:50,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 03:50:50,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:50:50,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 03:50:50,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-08-24 03:50:50,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 213 [2023-08-24 03:50:50,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 278 flow. Second operand has 14 states, 14 states have (on average 83.64285714285714) internal successors, (1171), 14 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:50,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:50:50,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 213 [2023-08-24 03:50:50,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:50:50,908 INFO L124 PetriNetUnfolderBase]: 288/586 cut-off events. [2023-08-24 03:50:50,909 INFO L125 PetriNetUnfolderBase]: For 1450/1450 co-relation queries the response was YES. [2023-08-24 03:50:50,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2291 conditions, 586 events. 288/586 cut-off events. For 1450/1450 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2936 event pairs, 166 based on Foata normal form. 23/607 useless extension candidates. Maximal degree in co-relation 1794. Up to 455 conditions per place. [2023-08-24 03:50:50,912 INFO L140 encePairwiseOnDemand]: 208/213 looper letters, 34 selfloop transitions, 3 changer transitions 30/67 dead transitions. [2023-08-24 03:50:50,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 67 transitions, 567 flow [2023-08-24 03:50:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 03:50:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 03:50:50,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 612 transitions. [2023-08-24 03:50:50,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4104627766599598 [2023-08-24 03:50:50,915 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 612 transitions. [2023-08-24 03:50:50,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 612 transitions. [2023-08-24 03:50:50,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:50:50,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 612 transitions. [2023-08-24 03:50:50,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.42857142857143) internal successors, (612), 7 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:50,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 213.0) internal successors, (1704), 8 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:50,919 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 213.0) internal successors, (1704), 8 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:50,919 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 278 flow. Second operand 7 states and 612 transitions. [2023-08-24 03:50:50,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 67 transitions, 567 flow [2023-08-24 03:50:50,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 67 transitions, 557 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-24 03:50:50,925 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 302 flow [2023-08-24 03:50:50,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=302, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2023-08-24 03:50:50,925 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 28 predicate places. [2023-08-24 03:50:50,925 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 302 flow [2023-08-24 03:50:50,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 83.64285714285714) internal successors, (1171), 14 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:50,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:50:50,927 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:50:50,936 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 03:50:51,133 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 03:50:51,133 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 03:50:51,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:50:51,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1032886888, now seen corresponding path program 5 times [2023-08-24 03:50:51,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:50:51,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895512748] [2023-08-24 03:50:51,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:50:51,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:50:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:50:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:50:51,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:50:51,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895512748] [2023-08-24 03:50:51,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895512748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:50:51,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540027799] [2023-08-24 03:50:51,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:50:51,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:50:51,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:50:51,561 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 03:50:51,563 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 03:50:51,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:50:51,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:50:51,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 03:50:51,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:50:51,813 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 03:50:51,813 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 21 treesize of output 10 [2023-08-24 03:50:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:50:51,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:50:51,874 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 03:50:51,874 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 28 treesize of output 11 [2023-08-24 03:50:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:50:51,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540027799] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:50:51,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:50:51,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 15 [2023-08-24 03:50:51,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423687774] [2023-08-24 03:50:51,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:50:51,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 03:50:51,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:50:51,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 03:50:51,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-08-24 03:50:51,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 213 [2023-08-24 03:50:51,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 302 flow. Second operand has 17 states, 17 states have (on average 77.58823529411765) internal successors, (1319), 17 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:51,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:50:51,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 213 [2023-08-24 03:50:51,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:50:52,538 INFO L124 PetriNetUnfolderBase]: 350/661 cut-off events. [2023-08-24 03:50:52,538 INFO L125 PetriNetUnfolderBase]: For 1372/1372 co-relation queries the response was YES. [2023-08-24 03:50:52,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2608 conditions, 661 events. 350/661 cut-off events. For 1372/1372 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3149 event pairs, 30 based on Foata normal form. 5/665 useless extension candidates. Maximal degree in co-relation 2576. Up to 422 conditions per place. [2023-08-24 03:50:52,542 INFO L140 encePairwiseOnDemand]: 207/213 looper letters, 69 selfloop transitions, 29 changer transitions 51/149 dead transitions. [2023-08-24 03:50:52,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 149 transitions, 1091 flow [2023-08-24 03:50:52,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 03:50:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 03:50:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1495 transitions. [2023-08-24 03:50:52,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3899321857068336 [2023-08-24 03:50:52,547 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1495 transitions. [2023-08-24 03:50:52,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1495 transitions. [2023-08-24 03:50:52,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:50:52,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1495 transitions. [2023-08-24 03:50:52,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 83.05555555555556) internal successors, (1495), 18 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:52,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 213.0) internal successors, (4047), 19 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:52,557 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 213.0) internal successors, (4047), 19 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:52,557 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 302 flow. Second operand 18 states and 1495 transitions. [2023-08-24 03:50:52,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 149 transitions, 1091 flow [2023-08-24 03:50:52,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 149 transitions, 1061 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-08-24 03:50:52,563 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 476 flow [2023-08-24 03:50:52,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=476, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2023-08-24 03:50:52,564 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 43 predicate places. [2023-08-24 03:50:52,564 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 476 flow [2023-08-24 03:50:52,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 77.58823529411765) internal successors, (1319), 17 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:52,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:50:52,565 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:50:52,573 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 03:50:52,771 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 03:50:52,771 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 03:50:52,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:50:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash 683063726, now seen corresponding path program 6 times [2023-08-24 03:50:52,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:50:52,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834337412] [2023-08-24 03:50:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:50:52,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:50:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:50:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:50:53,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:50:53,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834337412] [2023-08-24 03:50:53,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834337412] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:50:53,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763461694] [2023-08-24 03:50:53,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:50:53,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:50:53,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:50:53,197 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 03:50:53,200 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 03:50:53,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 03:50:53,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:50:53,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 03:50:53,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:50:53,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:50:53,407 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-24 03:50:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:50:53,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:50:53,527 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_233 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_233) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)) 5)) is different from false [2023-08-24 03:50:53,540 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:50:53,540 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-08-24 03:50:53,544 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-24 03:50:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-08-24 03:50:53,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763461694] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:50:53,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:50:53,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-24 03:50:53,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079227052] [2023-08-24 03:50:53,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:50:53,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 03:50:53,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:50:53,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 03:50:53,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=327, Unknown=1, NotChecked=36, Total=420 [2023-08-24 03:50:53,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 213 [2023-08-24 03:50:53,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 476 flow. Second operand has 21 states, 21 states have (on average 79.14285714285714) internal successors, (1662), 21 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:53,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:50:53,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 213 [2023-08-24 03:50:53,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:50:54,139 INFO L124 PetriNetUnfolderBase]: 408/756 cut-off events. [2023-08-24 03:50:54,140 INFO L125 PetriNetUnfolderBase]: For 2266/2266 co-relation queries the response was YES. [2023-08-24 03:50:54,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3171 conditions, 756 events. 408/756 cut-off events. For 2266/2266 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3661 event pairs, 37 based on Foata normal form. 1/756 useless extension candidates. Maximal degree in co-relation 3130. Up to 488 conditions per place. [2023-08-24 03:50:54,144 INFO L140 encePairwiseOnDemand]: 206/213 looper letters, 52 selfloop transitions, 34 changer transitions 31/117 dead transitions. [2023-08-24 03:50:54,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 1018 flow [2023-08-24 03:50:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 03:50:54,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 03:50:54,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1020 transitions. [2023-08-24 03:50:54,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39906103286384975 [2023-08-24 03:50:54,148 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1020 transitions. [2023-08-24 03:50:54,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1020 transitions. [2023-08-24 03:50:54,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:50:54,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1020 transitions. [2023-08-24 03:50:54,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 85.0) internal successors, (1020), 12 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:54,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 213.0) internal successors, (2769), 13 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:54,155 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 213.0) internal successors, (2769), 13 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:54,155 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 476 flow. Second operand 12 states and 1020 transitions. [2023-08-24 03:50:54,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 1018 flow [2023-08-24 03:50:54,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 117 transitions, 902 flow, removed 37 selfloop flow, removed 7 redundant places. [2023-08-24 03:50:54,164 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 524 flow [2023-08-24 03:50:54,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=524, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2023-08-24 03:50:54,164 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 49 predicate places. [2023-08-24 03:50:54,164 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 524 flow [2023-08-24 03:50:54,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 79.14285714285714) internal successors, (1662), 21 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:54,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:50:54,165 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:50:54,175 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 03:50:54,371 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 03:50:54,371 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 03:50:54,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:50:54,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1690663536, now seen corresponding path program 7 times [2023-08-24 03:50:54,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:50:54,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147971901] [2023-08-24 03:50:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:50:54,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:50:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:50:54,456 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 03:50:54,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:50:54,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147971901] [2023-08-24 03:50:54,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147971901] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:50:54,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815649327] [2023-08-24 03:50:54,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:50:54,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:50:54,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:50:54,458 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 03:50:54,475 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 03:50:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:50:54,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 03:50:54,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:50:54,569 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 03:50:54,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:50:54,594 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 03:50:54,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815649327] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:50:54,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:50:54,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-08-24 03:50:54,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962029183] [2023-08-24 03:50:54,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:50:54,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 03:50:54,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:50:54,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 03:50:54,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-24 03:50:54,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 213 [2023-08-24 03:50:54,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 524 flow. Second operand has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:54,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:50:54,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 213 [2023-08-24 03:50:54,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:50:54,839 INFO L124 PetriNetUnfolderBase]: 746/1405 cut-off events. [2023-08-24 03:50:54,839 INFO L125 PetriNetUnfolderBase]: For 4951/4951 co-relation queries the response was YES. [2023-08-24 03:50:54,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6364 conditions, 1405 events. 746/1405 cut-off events. For 4951/4951 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8100 event pairs, 157 based on Foata normal form. 18/1422 useless extension candidates. Maximal degree in co-relation 6324. Up to 892 conditions per place. [2023-08-24 03:50:54,848 INFO L140 encePairwiseOnDemand]: 210/213 looper letters, 59 selfloop transitions, 43 changer transitions 1/103 dead transitions. [2023-08-24 03:50:54,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 1177 flow [2023-08-24 03:50:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 03:50:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 03:50:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 533 transitions. [2023-08-24 03:50:54,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5004694835680751 [2023-08-24 03:50:54,851 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 533 transitions. [2023-08-24 03:50:54,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 533 transitions. [2023-08-24 03:50:54,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:50:54,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 533 transitions. [2023-08-24 03:50:54,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.6) internal successors, (533), 5 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:54,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:54,855 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:54,855 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 524 flow. Second operand 5 states and 533 transitions. [2023-08-24 03:50:54,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 1177 flow [2023-08-24 03:50:54,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 103 transitions, 1038 flow, removed 26 selfloop flow, removed 9 redundant places. [2023-08-24 03:50:54,868 INFO L231 Difference]: Finished difference. Result has 64 places, 77 transitions, 814 flow [2023-08-24 03:50:54,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=814, PETRI_PLACES=64, PETRI_TRANSITIONS=77} [2023-08-24 03:50:54,869 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 45 predicate places. [2023-08-24 03:50:54,869 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 77 transitions, 814 flow [2023-08-24 03:50:54,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:54,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:50:54,869 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:50:54,885 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 03:50:55,075 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 03:50:55,076 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 03:50:55,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:50:55,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1945474935, now seen corresponding path program 8 times [2023-08-24 03:50:55,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:50:55,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957008703] [2023-08-24 03:50:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:50:55,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:50:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:50:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:50:55,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:50:55,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957008703] [2023-08-24 03:50:55,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957008703] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:50:55,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181257990] [2023-08-24 03:50:55,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:50:55,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:50:55,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:50:55,262 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 03:50:55,265 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 03:50:55,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:50:55,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:50:55,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 03:50:55,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:50:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:50:55,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:50:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:50:55,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181257990] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:50:55,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:50:55,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2023-08-24 03:50:55,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723488571] [2023-08-24 03:50:55,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:50:55,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 03:50:55,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:50:55,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 03:50:55,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2023-08-24 03:50:55,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 213 [2023-08-24 03:50:55,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 77 transitions, 814 flow. Second operand has 22 states, 22 states have (on average 82.86363636363636) internal successors, (1823), 22 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:55,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:50:55,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 213 [2023-08-24 03:50:55,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:50:56,115 INFO L124 PetriNetUnfolderBase]: 945/1847 cut-off events. [2023-08-24 03:50:56,115 INFO L125 PetriNetUnfolderBase]: For 5690/5690 co-relation queries the response was YES. [2023-08-24 03:50:56,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8494 conditions, 1847 events. 945/1847 cut-off events. For 5690/5690 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11792 event pairs, 516 based on Foata normal form. 52/1897 useless extension candidates. Maximal degree in co-relation 7750. Up to 1398 conditions per place. [2023-08-24 03:50:56,126 INFO L140 encePairwiseOnDemand]: 208/213 looper letters, 74 selfloop transitions, 4 changer transitions 70/148 dead transitions. [2023-08-24 03:50:56,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 148 transitions, 1576 flow [2023-08-24 03:50:56,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 03:50:56,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 03:50:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1051 transitions. [2023-08-24 03:50:56,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41118935837245696 [2023-08-24 03:50:56,130 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1051 transitions. [2023-08-24 03:50:56,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1051 transitions. [2023-08-24 03:50:56,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:50:56,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1051 transitions. [2023-08-24 03:50:56,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 87.58333333333333) internal successors, (1051), 12 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:56,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 213.0) internal successors, (2769), 13 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:56,137 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 213.0) internal successors, (2769), 13 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:56,137 INFO L175 Difference]: Start difference. First operand has 64 places, 77 transitions, 814 flow. Second operand 12 states and 1051 transitions. [2023-08-24 03:50:56,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 148 transitions, 1576 flow [2023-08-24 03:50:56,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 148 transitions, 1497 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-24 03:50:56,154 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 830 flow [2023-08-24 03:50:56,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=830, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2023-08-24 03:50:56,156 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 62 predicate places. [2023-08-24 03:50:56,156 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 830 flow [2023-08-24 03:50:56,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 82.86363636363636) internal successors, (1823), 22 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:56,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:50:56,157 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:50:56,165 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 03:50:56,364 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 03:50:56,365 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 03:50:56,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:50:56,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1850245667, now seen corresponding path program 9 times [2023-08-24 03:50:56,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:50:56,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791352377] [2023-08-24 03:50:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:50:56,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:50:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:50:56,896 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 03:50:56,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:50:56,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791352377] [2023-08-24 03:50:56,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791352377] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:50:56,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538010491] [2023-08-24 03:50:56,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:50:56,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:50:56,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:50:56,897 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 03:50:56,899 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 03:50:57,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 03:50:57,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:50:57,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 03:50:57,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:50:57,397 INFO L322 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-08-24 03:50:57,397 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-08-24 03:50:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:50:57,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:50:57,584 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-24 03:50:57,584 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 27 treesize of output 13 [2023-08-24 03:50:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:50:57,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538010491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:50:57,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:50:57,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2023-08-24 03:50:57,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336658100] [2023-08-24 03:50:57,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:50:57,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 03:50:57,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:50:57,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 03:50:57,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2023-08-24 03:50:57,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 213 [2023-08-24 03:50:57,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 830 flow. Second operand has 29 states, 29 states have (on average 69.89655172413794) internal successors, (2027), 29 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:50:57,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:50:57,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 213 [2023-08-24 03:50:57,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:51:05,046 INFO L124 PetriNetUnfolderBase]: 2087/3953 cut-off events. [2023-08-24 03:51:05,046 INFO L125 PetriNetUnfolderBase]: For 11574/11574 co-relation queries the response was YES. [2023-08-24 03:51:05,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17765 conditions, 3953 events. 2087/3953 cut-off events. For 11574/11574 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28210 event pairs, 135 based on Foata normal form. 78/4029 useless extension candidates. Maximal degree in co-relation 17717. Up to 2499 conditions per place. [2023-08-24 03:51:05,067 INFO L140 encePairwiseOnDemand]: 206/213 looper letters, 159 selfloop transitions, 104 changer transitions 382/645 dead transitions. [2023-08-24 03:51:05,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 645 transitions, 5688 flow [2023-08-24 03:51:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-08-24 03:51:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-08-24 03:51:05,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 5336 transitions. [2023-08-24 03:51:05,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35788061703554663 [2023-08-24 03:51:05,078 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 5336 transitions. [2023-08-24 03:51:05,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 5336 transitions. [2023-08-24 03:51:05,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:51:05,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 5336 transitions. [2023-08-24 03:51:05,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 76.22857142857143) internal successors, (5336), 70 states have internal predecessors, (5336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:05,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 213.0) internal successors, (15123), 71 states have internal predecessors, (15123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:05,109 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 213.0) internal successors, (15123), 71 states have internal predecessors, (15123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:05,109 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 830 flow. Second operand 70 states and 5336 transitions. [2023-08-24 03:51:05,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 645 transitions, 5688 flow [2023-08-24 03:51:05,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 645 transitions, 5544 flow, removed 69 selfloop flow, removed 10 redundant places. [2023-08-24 03:51:05,147 INFO L231 Difference]: Finished difference. Result has 156 places, 124 transitions, 1625 flow [2023-08-24 03:51:05,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=1625, PETRI_PLACES=156, PETRI_TRANSITIONS=124} [2023-08-24 03:51:05,148 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 137 predicate places. [2023-08-24 03:51:05,148 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 124 transitions, 1625 flow [2023-08-24 03:51:05,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 69.89655172413794) internal successors, (2027), 29 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:05,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:51:05,149 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:51:05,155 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 03:51:05,355 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 03:51:05,355 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 03:51:05,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:51:05,356 INFO L85 PathProgramCache]: Analyzing trace with hash -300296673, now seen corresponding path program 10 times [2023-08-24 03:51:05,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:51:05,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758228972] [2023-08-24 03:51:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:51:05,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:51:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:51:05,980 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 03:51:05,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:51:05,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758228972] [2023-08-24 03:51:05,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758228972] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:51:05,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067066426] [2023-08-24 03:51:05,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:51:05,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:51:05,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:51:05,981 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 03:51:05,984 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 03:51:06,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:51:06,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:51:06,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 03:51:06,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:51:06,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:51:06,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-24 03:51:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:51:06,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:51:06,567 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:51:06,567 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-08-24 03:51:06,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-24 03:51:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 03:51:06,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067066426] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:51:06,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:51:06,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 30 [2023-08-24 03:51:06,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612953370] [2023-08-24 03:51:06,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:51:06,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 03:51:06,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:51:06,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 03:51:06,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=894, Unknown=1, NotChecked=0, Total=992 [2023-08-24 03:51:06,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 213 [2023-08-24 03:51:06,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 124 transitions, 1625 flow. Second operand has 32 states, 32 states have (on average 72.71875) internal successors, (2327), 32 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:06,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:51:06,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 213 [2023-08-24 03:51:06,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:51:07,909 INFO L124 PetriNetUnfolderBase]: 1273/2410 cut-off events. [2023-08-24 03:51:07,910 INFO L125 PetriNetUnfolderBase]: For 16361/16361 co-relation queries the response was YES. [2023-08-24 03:51:07,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12780 conditions, 2410 events. 1273/2410 cut-off events. For 16361/16361 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15312 event pairs, 101 based on Foata normal form. 5/2413 useless extension candidates. Maximal degree in co-relation 12679. Up to 1542 conditions per place. [2023-08-24 03:51:07,932 INFO L140 encePairwiseOnDemand]: 208/213 looper letters, 73 selfloop transitions, 95 changer transitions 47/215 dead transitions. [2023-08-24 03:51:07,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 215 transitions, 2616 flow [2023-08-24 03:51:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 03:51:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 03:51:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1405 transitions. [2023-08-24 03:51:07,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3664580073030777 [2023-08-24 03:51:07,935 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1405 transitions. [2023-08-24 03:51:07,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1405 transitions. [2023-08-24 03:51:07,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:51:07,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1405 transitions. [2023-08-24 03:51:07,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 78.05555555555556) internal successors, (1405), 18 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:07,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 213.0) internal successors, (4047), 19 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:07,949 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 213.0) internal successors, (4047), 19 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:07,949 INFO L175 Difference]: Start difference. First operand has 156 places, 124 transitions, 1625 flow. Second operand 18 states and 1405 transitions. [2023-08-24 03:51:07,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 215 transitions, 2616 flow [2023-08-24 03:51:08,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 215 transitions, 2239 flow, removed 100 selfloop flow, removed 20 redundant places. [2023-08-24 03:51:08,038 INFO L231 Difference]: Finished difference. Result has 128 places, 124 transitions, 1495 flow [2023-08-24 03:51:08,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1495, PETRI_PLACES=128, PETRI_TRANSITIONS=124} [2023-08-24 03:51:08,039 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 109 predicate places. [2023-08-24 03:51:08,039 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 124 transitions, 1495 flow [2023-08-24 03:51:08,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 72.71875) internal successors, (2327), 32 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:08,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:51:08,040 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:51:08,047 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 03:51:08,246 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 03:51:08,246 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 03:51:08,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:51:08,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1913056313, now seen corresponding path program 11 times [2023-08-24 03:51:08,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:51:08,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524114628] [2023-08-24 03:51:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:51:08,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:51:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:51:08,347 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 03:51:08,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:51:08,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524114628] [2023-08-24 03:51:08,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524114628] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:51:08,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227921977] [2023-08-24 03:51:08,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:51:08,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:51:08,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:51:08,349 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 03:51:08,351 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 03:51:08,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 03:51:08,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:51:08,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:51:08,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:51:08,493 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 03:51:08,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:51:08,544 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 03:51:08,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227921977] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:51:08,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:51:08,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2023-08-24 03:51:08,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40735635] [2023-08-24 03:51:08,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:51:08,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 03:51:08,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:51:08,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 03:51:08,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 03:51:08,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 213 [2023-08-24 03:51:08,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 124 transitions, 1495 flow. Second operand has 7 states, 7 states have (on average 101.0) internal successors, (707), 7 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:08,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:51:08,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 213 [2023-08-24 03:51:08,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:51:09,190 INFO L124 PetriNetUnfolderBase]: 2438/4587 cut-off events. [2023-08-24 03:51:09,191 INFO L125 PetriNetUnfolderBase]: For 24477/24477 co-relation queries the response was YES. [2023-08-24 03:51:09,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23628 conditions, 4587 events. 2438/4587 cut-off events. For 24477/24477 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32568 event pairs, 508 based on Foata normal form. 30/4616 useless extension candidates. Maximal degree in co-relation 23241. Up to 2925 conditions per place. [2023-08-24 03:51:09,222 INFO L140 encePairwiseOnDemand]: 210/213 looper letters, 103 selfloop transitions, 130 changer transitions 0/233 dead transitions. [2023-08-24 03:51:09,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 233 transitions, 3300 flow [2023-08-24 03:51:09,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 03:51:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 03:51:09,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 641 transitions. [2023-08-24 03:51:09,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015649452269171 [2023-08-24 03:51:09,224 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 641 transitions. [2023-08-24 03:51:09,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 641 transitions. [2023-08-24 03:51:09,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:51:09,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 641 transitions. [2023-08-24 03:51:09,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.83333333333333) internal successors, (641), 6 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:09,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 213.0) internal successors, (1491), 7 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:09,226 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 213.0) internal successors, (1491), 7 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:09,226 INFO L175 Difference]: Start difference. First operand has 128 places, 124 transitions, 1495 flow. Second operand 6 states and 641 transitions. [2023-08-24 03:51:09,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 233 transitions, 3300 flow [2023-08-24 03:51:09,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 233 transitions, 3123 flow, removed 31 selfloop flow, removed 9 redundant places. [2023-08-24 03:51:09,298 INFO L231 Difference]: Finished difference. Result has 128 places, 199 transitions, 2972 flow [2023-08-24 03:51:09,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2972, PETRI_PLACES=128, PETRI_TRANSITIONS=199} [2023-08-24 03:51:09,298 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 109 predicate places. [2023-08-24 03:51:09,299 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 199 transitions, 2972 flow [2023-08-24 03:51:09,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.0) internal successors, (707), 7 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:09,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:51:09,299 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:51:09,305 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 03:51:09,505 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 03:51:09,505 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 03:51:09,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:51:09,506 INFO L85 PathProgramCache]: Analyzing trace with hash -881644726, now seen corresponding path program 12 times [2023-08-24 03:51:09,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:51:09,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658971689] [2023-08-24 03:51:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:51:09,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:51:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:51:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 03:51:09,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:51:09,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658971689] [2023-08-24 03:51:09,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658971689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:51:09,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352646960] [2023-08-24 03:51:09,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:51:09,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:51:09,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:51:09,707 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 03:51:09,709 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 03:51:09,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 03:51:09,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:51:09,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 03:51:09,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:51:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:51:10,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:51:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 03:51:10,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352646960] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:51:10,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:51:10,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 28 [2023-08-24 03:51:10,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647130873] [2023-08-24 03:51:10,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:51:10,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 03:51:10,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:51:10,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 03:51:10,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2023-08-24 03:51:10,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 213 [2023-08-24 03:51:10,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 199 transitions, 2972 flow. Second operand has 29 states, 29 states have (on average 82.6896551724138) internal successors, (2398), 29 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:10,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:51:10,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 213 [2023-08-24 03:51:10,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:51:11,023 INFO L124 PetriNetUnfolderBase]: 2021/3795 cut-off events. [2023-08-24 03:51:11,023 INFO L125 PetriNetUnfolderBase]: For 23894/23894 co-relation queries the response was YES. [2023-08-24 03:51:11,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21477 conditions, 3795 events. 2021/3795 cut-off events. For 23894/23894 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 26699 event pairs, 1325 based on Foata normal form. 14/3808 useless extension candidates. Maximal degree in co-relation 21343. Up to 3580 conditions per place. [2023-08-24 03:51:11,050 INFO L140 encePairwiseOnDemand]: 208/213 looper letters, 160 selfloop transitions, 5 changer transitions 57/222 dead transitions. [2023-08-24 03:51:11,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 222 transitions, 3329 flow [2023-08-24 03:51:11,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 03:51:11,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 03:51:11,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1131 transitions. [2023-08-24 03:51:11,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4084507042253521 [2023-08-24 03:51:11,053 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1131 transitions. [2023-08-24 03:51:11,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1131 transitions. [2023-08-24 03:51:11,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:51:11,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1131 transitions. [2023-08-24 03:51:11,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 87.0) internal successors, (1131), 13 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:11,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 213.0) internal successors, (2982), 14 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:11,057 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 213.0) internal successors, (2982), 14 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:11,057 INFO L175 Difference]: Start difference. First operand has 128 places, 199 transitions, 2972 flow. Second operand 13 states and 1131 transitions. [2023-08-24 03:51:11,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 222 transitions, 3329 flow [2023-08-24 03:51:11,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 222 transitions, 3028 flow, removed 56 selfloop flow, removed 6 redundant places. [2023-08-24 03:51:11,161 INFO L231 Difference]: Finished difference. Result has 128 places, 165 transitions, 2289 flow [2023-08-24 03:51:11,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=2369, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2289, PETRI_PLACES=128, PETRI_TRANSITIONS=165} [2023-08-24 03:51:11,161 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 109 predicate places. [2023-08-24 03:51:11,161 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 165 transitions, 2289 flow [2023-08-24 03:51:11,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 82.6896551724138) internal successors, (2398), 29 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:11,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:51:11,162 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:51:11,168 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 03:51:11,368 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 03:51:11,368 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 03:51:11,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:51:11,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1282110002, now seen corresponding path program 13 times [2023-08-24 03:51:11,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:51:11,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227876546] [2023-08-24 03:51:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:51:11,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:51:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:51:11,918 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 03:51:11,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:51:11,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227876546] [2023-08-24 03:51:11,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227876546] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:51:11,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159711098] [2023-08-24 03:51:11,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:51:11,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:51:11,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:51:11,920 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 03:51:11,923 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 03:51:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:51:12,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:51:12,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:51:12,529 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 03:51:12,529 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 27 treesize of output 10 [2023-08-24 03:51:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:51:12,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:51:12,668 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 03:51:12,668 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 28 treesize of output 11 [2023-08-24 03:51:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 03:51:12,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159711098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:51:12,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:51:12,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 33 [2023-08-24 03:51:12,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765507926] [2023-08-24 03:51:12,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:51:12,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 03:51:12,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:51:12,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 03:51:12,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 03:51:12,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 213 [2023-08-24 03:51:12,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 165 transitions, 2289 flow. Second operand has 35 states, 35 states have (on average 76.77142857142857) internal successors, (2687), 35 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:12,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:51:12,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 213 [2023-08-24 03:51:12,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:51:15,419 INFO L124 PetriNetUnfolderBase]: 2480/4569 cut-off events. [2023-08-24 03:51:15,419 INFO L125 PetriNetUnfolderBase]: For 19479/19479 co-relation queries the response was YES. [2023-08-24 03:51:15,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22755 conditions, 4569 events. 2480/4569 cut-off events. For 19479/19479 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31787 event pairs, 90 based on Foata normal form. 9/4577 useless extension candidates. Maximal degree in co-relation 22698. Up to 2880 conditions per place. [2023-08-24 03:51:15,446 INFO L140 encePairwiseOnDemand]: 207/213 looper letters, 177 selfloop transitions, 193 changer transitions 163/533 dead transitions. [2023-08-24 03:51:15,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 533 transitions, 5610 flow [2023-08-24 03:51:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-24 03:51:15,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-24 03:51:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4394 transitions. [2023-08-24 03:51:15,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38922845247586146 [2023-08-24 03:51:15,453 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4394 transitions. [2023-08-24 03:51:15,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4394 transitions. [2023-08-24 03:51:15,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:51:15,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4394 transitions. [2023-08-24 03:51:15,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 82.90566037735849) internal successors, (4394), 53 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:15,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 213.0) internal successors, (11502), 54 states have internal predecessors, (11502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:15,474 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 213.0) internal successors, (11502), 54 states have internal predecessors, (11502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:15,474 INFO L175 Difference]: Start difference. First operand has 128 places, 165 transitions, 2289 flow. Second operand 53 states and 4394 transitions. [2023-08-24 03:51:15,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 533 transitions, 5610 flow [2023-08-24 03:51:15,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 533 transitions, 5550 flow, removed 25 selfloop flow, removed 10 redundant places. [2023-08-24 03:51:15,538 INFO L231 Difference]: Finished difference. Result has 164 places, 213 transitions, 3520 flow [2023-08-24 03:51:15,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=3520, PETRI_PLACES=164, PETRI_TRANSITIONS=213} [2023-08-24 03:51:15,540 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 145 predicate places. [2023-08-24 03:51:15,540 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 213 transitions, 3520 flow [2023-08-24 03:51:15,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 76.77142857142857) internal successors, (2687), 35 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:15,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:51:15,540 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:51:15,555 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 03:51:15,746 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 03:51:15,746 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 03:51:15,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:51:15,747 INFO L85 PathProgramCache]: Analyzing trace with hash -255406066, now seen corresponding path program 14 times [2023-08-24 03:51:15,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:51:15,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142543590] [2023-08-24 03:51:15,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:51:15,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:51:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:51:16,392 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 03:51:16,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:51:16,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142543590] [2023-08-24 03:51:16,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142543590] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:51:16,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233315413] [2023-08-24 03:51:16,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:51:16,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:51:16,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:51:16,397 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 03:51:16,399 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 03:51:16,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:51:16,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:51:16,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 03:51:16,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:51:16,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:51:16,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-24 03:51:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 03:51:16,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:51:16,970 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:51:16,970 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-08-24 03:51:16,973 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-24 03:51:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 03:51:17,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233315413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:51:17,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:51:17,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-08-24 03:51:17,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491791836] [2023-08-24 03:51:17,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:51:17,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 03:51:17,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:51:17,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 03:51:17,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1229, Unknown=1, NotChecked=0, Total=1332 [2023-08-24 03:51:17,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 213 [2023-08-24 03:51:17,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 213 transitions, 3520 flow. Second operand has 37 states, 37 states have (on average 72.62162162162163) internal successors, (2687), 37 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:17,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:51:17,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 213 [2023-08-24 03:51:17,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:51:19,370 INFO L124 PetriNetUnfolderBase]: 3200/5874 cut-off events. [2023-08-24 03:51:19,371 INFO L125 PetriNetUnfolderBase]: For 33657/33657 co-relation queries the response was YES. [2023-08-24 03:51:19,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31343 conditions, 5874 events. 3200/5874 cut-off events. For 33657/33657 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 42449 event pairs, 134 based on Foata normal form. 1/5874 useless extension candidates. Maximal degree in co-relation 31270. Up to 3690 conditions per place. [2023-08-24 03:51:19,402 INFO L140 encePairwiseOnDemand]: 208/213 looper letters, 101 selfloop transitions, 247 changer transitions 81/429 dead transitions. [2023-08-24 03:51:19,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 429 transitions, 6153 flow [2023-08-24 03:51:19,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 03:51:19,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 03:51:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2348 transitions. [2023-08-24 03:51:19,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674491392801252 [2023-08-24 03:51:19,405 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2348 transitions. [2023-08-24 03:51:19,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2348 transitions. [2023-08-24 03:51:19,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:51:19,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2348 transitions. [2023-08-24 03:51:19,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 78.26666666666667) internal successors, (2348), 30 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:19,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 213.0) internal successors, (6603), 31 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:19,415 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 213.0) internal successors, (6603), 31 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:19,415 INFO L175 Difference]: Start difference. First operand has 164 places, 213 transitions, 3520 flow. Second operand 30 states and 2348 transitions. [2023-08-24 03:51:19,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 429 transitions, 6153 flow [2023-08-24 03:51:19,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 429 transitions, 5586 flow, removed 63 selfloop flow, removed 19 redundant places. [2023-08-24 03:51:19,551 INFO L231 Difference]: Finished difference. Result has 175 places, 268 transitions, 4435 flow [2023-08-24 03:51:19,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=3069, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4435, PETRI_PLACES=175, PETRI_TRANSITIONS=268} [2023-08-24 03:51:19,551 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 156 predicate places. [2023-08-24 03:51:19,551 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 268 transitions, 4435 flow [2023-08-24 03:51:19,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 72.62162162162163) internal successors, (2687), 37 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:19,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:51:19,552 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:51:19,561 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 03:51:19,758 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 03:51:19,758 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 03:51:19,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:51:19,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1454043344, now seen corresponding path program 15 times [2023-08-24 03:51:19,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:51:19,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477296534] [2023-08-24 03:51:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:51:19,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:51:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:51:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 03:51:19,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:51:19,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477296534] [2023-08-24 03:51:19,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477296534] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:51:19,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71440456] [2023-08-24 03:51:19,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:51:19,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:51:19,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:51:19,869 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 03:51:19,870 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 03:51:20,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 03:51:20,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:51:20,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-24 03:51:20,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:51:20,413 INFO L322 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-08-24 03:51:20,414 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 31 treesize of output 16 [2023-08-24 03:51:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:51:20,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:51:20,663 INFO L322 Elim1Store]: treesize reduction 15, result has 55.9 percent of original size [2023-08-24 03:51:20,663 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 60 treesize of output 34 [2023-08-24 03:51:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 03:51:20,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71440456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:51:20,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:51:20,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 12] total 30 [2023-08-24 03:51:20,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086520128] [2023-08-24 03:51:20,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:51:20,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 03:51:20,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:51:20,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 03:51:20,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2023-08-24 03:51:20,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 213 [2023-08-24 03:51:20,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 268 transitions, 4435 flow. Second operand has 31 states, 31 states have (on average 70.12903225806451) internal successors, (2174), 31 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:20,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:51:20,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 213 [2023-08-24 03:51:20,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:51:27,909 INFO L124 PetriNetUnfolderBase]: 11547/21154 cut-off events. [2023-08-24 03:51:27,910 INFO L125 PetriNetUnfolderBase]: For 144379/144379 co-relation queries the response was YES. [2023-08-24 03:51:28,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114003 conditions, 21154 events. 11547/21154 cut-off events. For 144379/144379 co-relation queries the response was YES. Maximal size of possible extension queue 1202. Compared 185290 event pairs, 1043 based on Foata normal form. 52/21204 useless extension candidates. Maximal degree in co-relation 105296. Up to 13267 conditions per place. [2023-08-24 03:51:28,091 INFO L140 encePairwiseOnDemand]: 206/213 looper letters, 152 selfloop transitions, 345 changer transitions 782/1279 dead transitions. [2023-08-24 03:51:28,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 1279 transitions, 20470 flow [2023-08-24 03:51:28,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-24 03:51:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-24 03:51:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 5165 transitions. [2023-08-24 03:51:28,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35660038663352667 [2023-08-24 03:51:28,097 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 5165 transitions. [2023-08-24 03:51:28,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 5165 transitions. [2023-08-24 03:51:28,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:51:28,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 5165 transitions. [2023-08-24 03:51:28,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 75.95588235294117) internal successors, (5165), 68 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:28,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 213.0) internal successors, (14697), 69 states have internal predecessors, (14697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:28,117 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 213.0) internal successors, (14697), 69 states have internal predecessors, (14697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:28,117 INFO L175 Difference]: Start difference. First operand has 175 places, 268 transitions, 4435 flow. Second operand 68 states and 5165 transitions. [2023-08-24 03:51:28,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 1279 transitions, 20470 flow [2023-08-24 03:51:28,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 1279 transitions, 20025 flow, removed 77 selfloop flow, removed 12 redundant places. [2023-08-24 03:51:28,859 INFO L231 Difference]: Finished difference. Result has 252 places, 446 transitions, 8528 flow [2023-08-24 03:51:28,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=8528, PETRI_PLACES=252, PETRI_TRANSITIONS=446} [2023-08-24 03:51:28,859 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 233 predicate places. [2023-08-24 03:51:28,859 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 446 transitions, 8528 flow [2023-08-24 03:51:28,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 70.12903225806451) internal successors, (2174), 31 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:28,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:51:28,860 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:51:28,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-24 03:51:29,060 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 03:51:29,061 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 03:51:29,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:51:29,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1169849025, now seen corresponding path program 16 times [2023-08-24 03:51:29,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:51:29,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128067337] [2023-08-24 03:51:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:51:29,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:51:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:51:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 03:51:29,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:51:29,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128067337] [2023-08-24 03:51:29,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128067337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:51:29,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991753430] [2023-08-24 03:51:29,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:51:29,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:51:29,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:51:29,369 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 03:51:29,377 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 03:51:29,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:51:29,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:51:29,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 03:51:29,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:51:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 03:51:29,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:51:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 03:51:30,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991753430] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:51:30,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:51:30,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-24 03:51:30,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408755805] [2023-08-24 03:51:30,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:51:30,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 03:51:30,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:51:30,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 03:51:30,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 03:51:30,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 213 [2023-08-24 03:51:30,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 446 transitions, 8528 flow. Second operand has 35 states, 35 states have (on average 82.57142857142857) internal successors, (2890), 35 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:30,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:51:30,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 213 [2023-08-24 03:51:30,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:51:32,712 INFO L124 PetriNetUnfolderBase]: 6457/11992 cut-off events. [2023-08-24 03:51:32,712 INFO L125 PetriNetUnfolderBase]: For 75567/75567 co-relation queries the response was YES. [2023-08-24 03:51:32,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66971 conditions, 11992 events. 6457/11992 cut-off events. For 75567/75567 co-relation queries the response was YES. Maximal size of possible extension queue 679. Compared 100191 event pairs, 4002 based on Foata normal form. 137/12127 useless extension candidates. Maximal degree in co-relation 66700. Up to 10638 conditions per place. [2023-08-24 03:51:32,790 INFO L140 encePairwiseOnDemand]: 208/213 looper letters, 431 selfloop transitions, 6 changer transitions 159/596 dead transitions. [2023-08-24 03:51:32,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 596 transitions, 10987 flow [2023-08-24 03:51:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 03:51:32,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 03:51:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1928 transitions. [2023-08-24 03:51:32,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4114383269312847 [2023-08-24 03:51:32,793 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1928 transitions. [2023-08-24 03:51:32,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1928 transitions. [2023-08-24 03:51:32,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:51:32,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1928 transitions. [2023-08-24 03:51:32,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 87.63636363636364) internal successors, (1928), 22 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:32,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 213.0) internal successors, (4899), 23 states have internal predecessors, (4899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:32,800 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 213.0) internal successors, (4899), 23 states have internal predecessors, (4899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:32,800 INFO L175 Difference]: Start difference. First operand has 252 places, 446 transitions, 8528 flow. Second operand 22 states and 1928 transitions. [2023-08-24 03:51:32,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 596 transitions, 10987 flow [2023-08-24 03:51:33,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 596 transitions, 10343 flow, removed 304 selfloop flow, removed 23 redundant places. [2023-08-24 03:51:33,351 INFO L231 Difference]: Finished difference. Result has 218 places, 437 transitions, 7942 flow [2023-08-24 03:51:33,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=7887, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7942, PETRI_PLACES=218, PETRI_TRANSITIONS=437} [2023-08-24 03:51:33,352 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 199 predicate places. [2023-08-24 03:51:33,352 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 437 transitions, 7942 flow [2023-08-24 03:51:33,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 82.57142857142857) internal successors, (2890), 35 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:33,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:51:33,353 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:51:33,357 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 03:51:33,553 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 03:51:33,554 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 03:51:33,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:51:33,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1061227473, now seen corresponding path program 17 times [2023-08-24 03:51:33,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:51:33,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393770449] [2023-08-24 03:51:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:51:33,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:51:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:51:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:51:34,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:51:34,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393770449] [2023-08-24 03:51:34,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393770449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:51:34,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637385702] [2023-08-24 03:51:34,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:51:34,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:51:34,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:51:34,207 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 03:51:34,210 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 03:51:34,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 03:51:34,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:51:34,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-24 03:51:34,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:51:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:51:34,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:51:35,029 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 03:51:35,030 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 28 treesize of output 11 [2023-08-24 03:51:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-24 03:51:35,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637385702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:51:35,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:51:35,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 11] total 41 [2023-08-24 03:51:35,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494959894] [2023-08-24 03:51:35,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:51:35,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 03:51:35,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:51:35,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 03:51:35,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2023-08-24 03:51:35,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 213 [2023-08-24 03:51:35,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 437 transitions, 7942 flow. Second operand has 43 states, 43 states have (on average 76.65116279069767) internal successors, (3296), 43 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:35,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:51:35,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 213 [2023-08-24 03:51:35,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:51:41,098 INFO L124 PetriNetUnfolderBase]: 7212/13164 cut-off events. [2023-08-24 03:51:41,098 INFO L125 PetriNetUnfolderBase]: For 89653/89653 co-relation queries the response was YES. [2023-08-24 03:51:41,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70978 conditions, 13164 events. 7212/13164 cut-off events. For 89653/89653 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 107171 event pairs, 274 based on Foata normal form. 11/13174 useless extension candidates. Maximal degree in co-relation 70895. Up to 8234 conditions per place. [2023-08-24 03:51:41,166 INFO L140 encePairwiseOnDemand]: 207/213 looper letters, 251 selfloop transitions, 521 changer transitions 240/1012 dead transitions. [2023-08-24 03:51:41,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 1012 transitions, 14118 flow [2023-08-24 03:51:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-24 03:51:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-24 03:51:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 6305 transitions. [2023-08-24 03:51:41,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894860390412651 [2023-08-24 03:51:41,174 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 6305 transitions. [2023-08-24 03:51:41,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 6305 transitions. [2023-08-24 03:51:41,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:51:41,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 6305 transitions. [2023-08-24 03:51:41,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 82.96052631578948) internal successors, (6305), 76 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:41,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 213.0) internal successors, (16401), 77 states have internal predecessors, (16401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:41,195 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 213.0) internal successors, (16401), 77 states have internal predecessors, (16401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:41,196 INFO L175 Difference]: Start difference. First operand has 218 places, 437 transitions, 7942 flow. Second operand 76 states and 6305 transitions. [2023-08-24 03:51:41,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 1012 transitions, 14118 flow [2023-08-24 03:51:41,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 1012 transitions, 13887 flow, removed 95 selfloop flow, removed 26 redundant places. [2023-08-24 03:51:41,636 INFO L231 Difference]: Finished difference. Result has 258 places, 543 transitions, 11309 flow [2023-08-24 03:51:41,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=7741, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=11309, PETRI_PLACES=258, PETRI_TRANSITIONS=543} [2023-08-24 03:51:41,638 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 239 predicate places. [2023-08-24 03:51:41,638 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 543 transitions, 11309 flow [2023-08-24 03:51:41,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 76.65116279069767) internal successors, (3296), 43 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:41,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:51:41,639 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:51:41,648 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 03:51:41,845 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 03:51:41,845 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:51:41,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:51:41,846 INFO L85 PathProgramCache]: Analyzing trace with hash 956767295, now seen corresponding path program 18 times [2023-08-24 03:51:41,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:51:41,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714534997] [2023-08-24 03:51:41,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:51:41,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:51:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:51:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:51:43,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:51:43,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714534997] [2023-08-24 03:51:43,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714534997] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:51:43,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374520666] [2023-08-24 03:51:43,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:51:43,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:51:43,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:51:43,130 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:51:43,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 03:51:43,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 03:51:43,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:51:43,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-24 03:51:43,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:51:43,635 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 03:51:43,690 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 03:51:43,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:51:43,858 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-24 03:51:44,207 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:51:44,209 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:51:44,209 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 17 treesize of output 10 [2023-08-24 03:51:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 03:51:44,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:51:44,766 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:51:44,767 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 61 treesize of output 49 [2023-08-24 03:51:44,779 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:51:44,779 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 110 treesize of output 98 [2023-08-24 03:51:44,787 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2023-08-24 03:51:44,799 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:51:44,799 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 55 treesize of output 47 [2023-08-24 03:51:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 03:51:45,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374520666] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:51:45,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:51:45,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 44 [2023-08-24 03:51:45,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814000409] [2023-08-24 03:51:45,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:51:45,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-24 03:51:45,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:51:45,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-24 03:51:45,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1851, Unknown=0, NotChecked=0, Total=2070 [2023-08-24 03:51:45,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 213 [2023-08-24 03:51:45,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 543 transitions, 11309 flow. Second operand has 46 states, 46 states have (on average 62.5) internal successors, (2875), 46 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:51:45,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:51:45,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 213 [2023-08-24 03:51:45,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:51:48,242 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 03:52:04,867 INFO L124 PetriNetUnfolderBase]: 25709/46953 cut-off events. [2023-08-24 03:52:04,867 INFO L125 PetriNetUnfolderBase]: For 387665/387665 co-relation queries the response was YES. [2023-08-24 03:52:05,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277637 conditions, 46953 events. 25709/46953 cut-off events. For 387665/387665 co-relation queries the response was YES. Maximal size of possible extension queue 2565. Compared 458817 event pairs, 5444 based on Foata normal form. 7/46958 useless extension candidates. Maximal degree in co-relation 274679. Up to 29385 conditions per place. [2023-08-24 03:52:05,340 INFO L140 encePairwiseOnDemand]: 206/213 looper letters, 808 selfloop transitions, 1349 changer transitions 193/2350 dead transitions. [2023-08-24 03:52:05,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 2350 transitions, 49329 flow [2023-08-24 03:52:05,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-24 03:52:05,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-24 03:52:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4923 transitions. [2023-08-24 03:52:05,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3210093896713615 [2023-08-24 03:52:05,344 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4923 transitions. [2023-08-24 03:52:05,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4923 transitions. [2023-08-24 03:52:05,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:52:05,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4923 transitions. [2023-08-24 03:52:05,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 68.375) internal successors, (4923), 72 states have internal predecessors, (4923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:52:05,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 213.0) internal successors, (15549), 73 states have internal predecessors, (15549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:52:05,363 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 213.0) internal successors, (15549), 73 states have internal predecessors, (15549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:52:05,363 INFO L175 Difference]: Start difference. First operand has 258 places, 543 transitions, 11309 flow. Second operand 72 states and 4923 transitions. [2023-08-24 03:52:05,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 2350 transitions, 49329 flow [2023-08-24 03:52:12,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 2350 transitions, 44927 flow, removed 273 selfloop flow, removed 30 redundant places. [2023-08-24 03:52:12,261 INFO L231 Difference]: Finished difference. Result has 343 places, 1842 transitions, 41708 flow [2023-08-24 03:52:12,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=10173, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=41708, PETRI_PLACES=343, PETRI_TRANSITIONS=1842} [2023-08-24 03:52:12,261 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 324 predicate places. [2023-08-24 03:52:12,262 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 1842 transitions, 41708 flow [2023-08-24 03:52:12,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 62.5) internal successors, (2875), 46 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:52:12,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:52:12,262 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:52:12,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 03:52:12,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:52:12,463 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:52:12,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:52:12,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1272499873, now seen corresponding path program 19 times [2023-08-24 03:52:12,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:52:12,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426756119] [2023-08-24 03:52:12,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:52:12,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:52:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:52:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:52:13,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:52:13,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426756119] [2023-08-24 03:52:13,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426756119] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:52:13,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268110952] [2023-08-24 03:52:13,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:52:13,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:52:13,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:52:13,285 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:52:13,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 03:52:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:52:13,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 03:52:13,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:52:13,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:52:13,709 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-24 03:52:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-24 03:52:13,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:52:14,167 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:52:14,168 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-08-24 03:52:14,176 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-24 03:52:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-24 03:52:14,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268110952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:52:14,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:52:14,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 42 [2023-08-24 03:52:14,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961816412] [2023-08-24 03:52:14,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:52:14,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-24 03:52:14,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:52:14,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-24 03:52:14,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1767, Unknown=6, NotChecked=0, Total=1892 [2023-08-24 03:52:14,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 213 [2023-08-24 03:52:14,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 1842 transitions, 41708 flow. Second operand has 44 states, 44 states have (on average 72.54545454545455) internal successors, (3192), 44 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:52:14,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:52:14,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 213 [2023-08-24 03:52:14,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:52:34,259 INFO L124 PetriNetUnfolderBase]: 25789/47098 cut-off events. [2023-08-24 03:52:34,260 INFO L125 PetriNetUnfolderBase]: For 596293/596293 co-relation queries the response was YES. [2023-08-24 03:52:35,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303401 conditions, 47098 events. 25789/47098 cut-off events. For 596293/596293 co-relation queries the response was YES. Maximal size of possible extension queue 2558. Compared 457388 event pairs, 1380 based on Foata normal form. 1/47098 useless extension candidates. Maximal degree in co-relation 302767. Up to 29475 conditions per place. [2023-08-24 03:52:35,099 INFO L140 encePairwiseOnDemand]: 208/213 looper letters, 114 selfloop transitions, 1802 changer transitions 72/1988 dead transitions. [2023-08-24 03:52:35,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1988 transitions, 46653 flow [2023-08-24 03:52:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 03:52:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 03:52:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2185 transitions. [2023-08-24 03:52:35,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36636485580147554 [2023-08-24 03:52:35,102 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2185 transitions. [2023-08-24 03:52:35,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2185 transitions. [2023-08-24 03:52:35,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:52:35,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2185 transitions. [2023-08-24 03:52:35,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 78.03571428571429) internal successors, (2185), 28 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:52:35,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 213.0) internal successors, (6177), 29 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:52:35,110 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 213.0) internal successors, (6177), 29 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:52:35,110 INFO L175 Difference]: Start difference. First operand has 343 places, 1842 transitions, 41708 flow. Second operand 28 states and 2185 transitions. [2023-08-24 03:52:35,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1988 transitions, 46653 flow [2023-08-24 03:52:48,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1988 transitions, 45999 flow, removed 322 selfloop flow, removed 5 redundant places. [2023-08-24 03:52:48,218 INFO L231 Difference]: Finished difference. Result has 366 places, 1847 transitions, 44832 flow [2023-08-24 03:52:48,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=41094, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1797, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=44832, PETRI_PLACES=366, PETRI_TRANSITIONS=1847} [2023-08-24 03:52:48,220 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 347 predicate places. [2023-08-24 03:52:48,220 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 1847 transitions, 44832 flow [2023-08-24 03:52:48,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 72.54545454545455) internal successors, (3192), 44 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:52:48,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:52:48,221 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:52:48,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 03:52:48,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:52:48,425 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:52:48,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:52:48,425 INFO L85 PathProgramCache]: Analyzing trace with hash 258202521, now seen corresponding path program 20 times [2023-08-24 03:52:48,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:52:48,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44604633] [2023-08-24 03:52:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:52:48,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:52:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:52:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-24 03:52:48,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:52:48,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44604633] [2023-08-24 03:52:48,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44604633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:52:48,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708342591] [2023-08-24 03:52:48,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:52:48,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:52:48,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:52:48,578 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:52:48,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 03:52:48,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:52:48,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:52:48,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 03:52:48,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:52:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-24 03:52:48,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:52:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-24 03:52:48,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708342591] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:52:48,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:52:48,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2023-08-24 03:52:48,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494721365] [2023-08-24 03:52:48,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:52:48,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 03:52:48,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:52:48,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 03:52:48,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-24 03:52:48,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 213 [2023-08-24 03:52:48,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1847 transitions, 44832 flow. Second operand has 8 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:52:48,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:52:48,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 213 [2023-08-24 03:52:48,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:53:23,344 INFO L124 PetriNetUnfolderBase]: 44795/81627 cut-off events. [2023-08-24 03:53:23,344 INFO L125 PetriNetUnfolderBase]: For 1260785/1260785 co-relation queries the response was YES. [2023-08-24 03:53:24,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558381 conditions, 81627 events. 44795/81627 cut-off events. For 1260785/1260785 co-relation queries the response was YES. Maximal size of possible extension queue 4250. Compared 849530 event pairs, 5835 based on Foata normal form. 78/81705 useless extension candidates. Maximal degree in co-relation 554373. Up to 50965 conditions per place. [2023-08-24 03:53:24,970 INFO L140 encePairwiseOnDemand]: 210/213 looper letters, 722 selfloop transitions, 2368 changer transitions 0/3090 dead transitions. [2023-08-24 03:53:24,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 3090 transitions, 82208 flow [2023-08-24 03:53:24,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:53:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:53:24,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 857 transitions. [2023-08-24 03:53:24,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029342723004695 [2023-08-24 03:53:24,972 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 857 transitions. [2023-08-24 03:53:24,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 857 transitions. [2023-08-24 03:53:24,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:53:24,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 857 transitions. [2023-08-24 03:53:24,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 107.125) internal successors, (857), 8 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:53:24,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:53:24,974 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:53:24,975 INFO L175 Difference]: Start difference. First operand has 366 places, 1847 transitions, 44832 flow. Second operand 8 states and 857 transitions. [2023-08-24 03:53:24,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 3090 transitions, 82208 flow [2023-08-24 03:53:46,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 3090 transitions, 76788 flow, removed 61 selfloop flow, removed 24 redundant places. [2023-08-24 03:53:46,977 INFO L231 Difference]: Finished difference. Result has 355 places, 3040 transitions, 80680 flow [2023-08-24 03:53:46,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=41349, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=80680, PETRI_PLACES=355, PETRI_TRANSITIONS=3040} [2023-08-24 03:53:46,979 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 336 predicate places. [2023-08-24 03:53:46,979 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 3040 transitions, 80680 flow [2023-08-24 03:53:46,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:53:46,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:53:46,979 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:53:46,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 03:53:47,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-24 03:53:47,185 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:53:47,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:53:47,185 INFO L85 PathProgramCache]: Analyzing trace with hash 410443728, now seen corresponding path program 21 times [2023-08-24 03:53:47,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:53:47,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814749667] [2023-08-24 03:53:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:53:47,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:53:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:53:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-24 03:53:47,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:53:47,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814749667] [2023-08-24 03:53:47,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814749667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:53:47,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872500984] [2023-08-24 03:53:47,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:53:47,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:53:47,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:53:47,825 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:53:47,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 03:53:48,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 03:53:48,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:53:48,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 03:53:48,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:53:54,635 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 03:53:54,635 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 27 treesize of output 10 [2023-08-24 03:53:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 42 refuted. 3 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 03:53:54,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:53:54,749 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 03:53:54,750 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 28 treesize of output 11 [2023-08-24 03:53:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 03:53:55,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872500984] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:53:55,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:53:55,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2023-08-24 03:53:55,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660753745] [2023-08-24 03:53:55,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:53:55,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-24 03:53:55,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:53:55,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-24 03:53:55,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1637, Unknown=3, NotChecked=0, Total=1892 [2023-08-24 03:53:55,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 213 [2023-08-24 03:53:55,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 3040 transitions, 80680 flow. Second operand has 44 states, 44 states have (on average 69.47727272727273) internal successors, (3057), 44 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:53:55,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:53:55,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 213 [2023-08-24 03:53:55,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:54:11,443 WARN L234 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 41 DAG size of output: 39 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:54:36,326 WARN L234 SmtUtils]: Spent 12.06s on a formula simplification. DAG size of input: 52 DAG size of output: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:54:46,435 WARN L234 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 44 DAG size of output: 42 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:54:58,616 WARN L234 SmtUtils]: Spent 12.06s on a formula simplification. DAG size of input: 54 DAG size of output: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:55:41,853 WARN L234 SmtUtils]: Spent 14.13s on a formula simplification. DAG size of input: 52 DAG size of output: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:57:56,238 INFO L124 PetriNetUnfolderBase]: 132139/240653 cut-off events. [2023-08-24 03:57:56,239 INFO L125 PetriNetUnfolderBase]: For 3662809/3662809 co-relation queries the response was YES. [2023-08-24 03:58:00,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1757051 conditions, 240653 events. 132139/240653 cut-off events. For 3662809/3662809 co-relation queries the response was YES. Maximal size of possible extension queue 13447. Compared 2845569 event pairs, 21806 based on Foata normal form. 128/240781 useless extension candidates. Maximal degree in co-relation 1751950. Up to 150043 conditions per place. [2023-08-24 03:58:00,969 INFO L140 encePairwiseOnDemand]: 206/213 looper letters, 1925 selfloop transitions, 2391 changer transitions 6028/10344 dead transitions. [2023-08-24 03:58:00,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 10344 transitions, 276614 flow [2023-08-24 03:58:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2023-08-24 03:58:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2023-08-24 03:58:00,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 13493 transitions. [2023-08-24 03:58:00,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3578950160473197 [2023-08-24 03:58:00,981 INFO L72 ComplementDD]: Start complementDD. Operand 177 states and 13493 transitions. [2023-08-24 03:58:00,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 177 states and 13493 transitions. [2023-08-24 03:58:00,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:58:00,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 177 states and 13493 transitions. [2023-08-24 03:58:00,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 178 states, 177 states have (on average 76.2316384180791) internal successors, (13493), 177 states have internal predecessors, (13493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:58:01,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 178 states, 178 states have (on average 213.0) internal successors, (37914), 178 states have internal predecessors, (37914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:58:01,029 INFO L81 ComplementDD]: Finished complementDD. Result has 178 states, 178 states have (on average 213.0) internal successors, (37914), 178 states have internal predecessors, (37914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:58:01,029 INFO L175 Difference]: Start difference. First operand has 355 places, 3040 transitions, 80680 flow. Second operand 177 states and 13493 transitions. [2023-08-24 03:58:01,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 10344 transitions, 276614 flow Received shutdown request... [2023-08-24 04:04:04,918 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 04:04:04,918 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 04:04:05,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 04:04:05,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown