/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 16:41:16,174 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 16:41:16,248 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 16:41:16,253 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 16:41:16,253 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 16:41:16,290 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 16:41:16,290 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 16:41:16,291 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 16:41:16,291 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 16:41:16,295 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 16:41:16,295 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 16:41:16,295 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 16:41:16,295 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 16:41:16,296 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 16:41:16,297 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 16:41:16,297 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 16:41:16,297 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 16:41:16,297 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 16:41:16,298 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 16:41:16,298 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 16:41:16,298 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 16:41:16,299 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 16:41:16,299 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 16:41:16,300 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 16:41:16,300 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 16:41:16,300 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 16:41:16,300 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 16:41:16,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 16:41:16,301 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 16:41:16,301 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 16:41:16,302 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 16:41:16,302 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 16:41:16,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 16:41:16,303 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 16:41:16,303 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 16:41:16,303 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 16:41:16,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 16:41:16,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 16:41:16,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 16:41:16,650 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 16:41:16,651 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 16:41:16,652 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-08-24 16:41:17,862 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 16:41:18,098 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 16:41:18,099 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-08-24 16:41:18,109 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db9ff5d4f/482c7a3b767748af9d58f435841bb9ef/FLAGf3a372f86 [2023-08-24 16:41:18,125 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db9ff5d4f/482c7a3b767748af9d58f435841bb9ef [2023-08-24 16:41:18,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 16:41:18,133 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 16:41:18,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 16:41:18,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 16:41:18,140 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 16:41:18,141 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:41:18" (1/1) ... [2023-08-24 16:41:18,142 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@106a4aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:41:18, skipping insertion in model container [2023-08-24 16:41:18,142 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:41:18" (1/1) ... [2023-08-24 16:41:18,166 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 16:41:18,350 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/unroll-2.wvr.c[2428,2441] [2023-08-24 16:41:18,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 16:41:18,370 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 16:41:18,405 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/unroll-2.wvr.c[2428,2441] [2023-08-24 16:41:18,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 16:41:18,425 INFO L206 MainTranslator]: Completed translation [2023-08-24 16:41:18,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:41:18 WrapperNode [2023-08-24 16:41:18,426 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 16:41:18,427 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 16:41:18,427 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 16:41:18,427 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 16:41:18,433 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:41:18" (1/1) ... [2023-08-24 16:41:18,446 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:41:18" (1/1) ... [2023-08-24 16:41:18,478 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 138 [2023-08-24 16:41:18,478 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 16:41:18,479 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 16:41:18,480 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 16:41:18,480 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 16:41:18,487 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:41:18" (1/1) ... [2023-08-24 16:41:18,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:41:18" (1/1) ... [2023-08-24 16:41:18,502 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:41:18" (1/1) ... [2023-08-24 16:41:18,502 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:41:18" (1/1) ... [2023-08-24 16:41:18,507 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:41:18" (1/1) ... [2023-08-24 16:41:18,510 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:41:18" (1/1) ... [2023-08-24 16:41:18,512 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:41:18" (1/1) ... [2023-08-24 16:41:18,520 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:41:18" (1/1) ... [2023-08-24 16:41:18,528 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 16:41:18,529 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 16:41:18,529 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 16:41:18,529 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 16:41:18,529 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:41:18" (1/1) ... [2023-08-24 16:41:18,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 16:41:18,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:18,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 16:41:18,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 16:41:18,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 16:41:18,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 16:41:18,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 16:41:18,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 16:41:18,594 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 16:41:18,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 16:41:18,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 16:41:18,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 16:41:18,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 16:41:18,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 16:41:18,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 16:41:18,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 16:41:18,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 16:41:18,596 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 16:41:18,679 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 16:41:18,680 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 16:41:19,024 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 16:41:19,032 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 16:41:19,032 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 16:41:19,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:41:19 BoogieIcfgContainer [2023-08-24 16:41:19,034 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 16:41:19,036 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 16:41:19,036 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 16:41:19,039 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 16:41:19,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 04:41:18" (1/3) ... [2023-08-24 16:41:19,040 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b437d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:41:19, skipping insertion in model container [2023-08-24 16:41:19,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:41:18" (2/3) ... [2023-08-24 16:41:19,040 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b437d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:41:19, skipping insertion in model container [2023-08-24 16:41:19,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:41:19" (3/3) ... [2023-08-24 16:41:19,041 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2023-08-24 16:41:19,056 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 16:41:19,056 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 16:41:19,056 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 16:41:19,155 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 16:41:19,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 158 transitions, 332 flow [2023-08-24 16:41:19,290 INFO L124 PetriNetUnfolderBase]: 14/156 cut-off events. [2023-08-24 16:41:19,290 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:41:19,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 156 events. 14/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 148 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-08-24 16:41:19,297 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 158 transitions, 332 flow [2023-08-24 16:41:19,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 148 transitions, 308 flow [2023-08-24 16:41:19,309 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 16:41:19,319 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 148 transitions, 308 flow [2023-08-24 16:41:19,323 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 148 transitions, 308 flow [2023-08-24 16:41:19,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 148 transitions, 308 flow [2023-08-24 16:41:19,370 INFO L124 PetriNetUnfolderBase]: 14/148 cut-off events. [2023-08-24 16:41:19,370 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:41:19,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 148 events. 14/148 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 141 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-08-24 16:41:19,375 INFO L119 LiptonReduction]: Number of co-enabled transitions 1942 [2023-08-24 16:41:23,789 INFO L134 LiptonReduction]: Checked pairs total: 1977 [2023-08-24 16:41:23,789 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-08-24 16:41:23,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 16:41:23,806 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;@5fe8cf31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 16:41:23,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 16:41:23,811 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 16:41:23,811 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-08-24 16:41:23,811 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:41:23,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:23,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:23,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:23,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:23,816 INFO L85 PathProgramCache]: Analyzing trace with hash -501669352, now seen corresponding path program 1 times [2023-08-24 16:41:23,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:23,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485626055] [2023-08-24 16:41:23,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:23,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:41:24,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:24,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485626055] [2023-08-24 16:41:24,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485626055] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:41:24,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:41:24,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 16:41:24,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834793573] [2023-08-24 16:41:24,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:41:24,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 16:41:24,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:24,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 16:41:24,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 16:41:24,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 331 [2023-08-24 16:41:24,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:24,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 331 [2023-08-24 16:41:24,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:24,221 INFO L124 PetriNetUnfolderBase]: 45/80 cut-off events. [2023-08-24 16:41:24,221 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 16:41:24,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 176 event pairs, 18 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-08-24 16:41:24,223 INFO L140 encePairwiseOnDemand]: 328/331 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-24 16:41:24,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-24 16:41:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 16:41:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 16:41:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-08-24 16:41:24,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40986908358509566 [2023-08-24 16:41:24,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-08-24 16:41:24,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-08-24 16:41:24,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:24,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-08-24 16:41:24,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,260 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 407 transitions. [2023-08-24 16:41:24,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-24 16:41:24,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 16:41:24,264 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-24 16:41:24,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-24 16:41:24,269 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-24 16:41:24,269 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-24 16:41:24,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:24,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:24,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 16:41:24,270 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:24,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:24,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1042169871, now seen corresponding path program 1 times [2023-08-24 16:41:24,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:24,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26273284] [2023-08-24 16:41:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:24,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:24,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:24,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26273284] [2023-08-24 16:41:24,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26273284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:41:24,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:41:24,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 16:41:24,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601860552] [2023-08-24 16:41:24,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:41:24,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 16:41:24,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:24,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 16:41:24,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 16:41:24,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 331 [2023-08-24 16:41:24,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:24,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 331 [2023-08-24 16:41:24,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:24,463 INFO L124 PetriNetUnfolderBase]: 66/117 cut-off events. [2023-08-24 16:41:24,463 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:41:24,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 319 event pairs, 9 based on Foata normal form. 1/79 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-08-24 16:41:24,465 INFO L140 encePairwiseOnDemand]: 327/331 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-08-24 16:41:24,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2023-08-24 16:41:24,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 16:41:24,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 16:41:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2023-08-24 16:41:24,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418932527693857 [2023-08-24 16:41:24,467 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2023-08-24 16:41:24,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2023-08-24 16:41:24,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:24,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2023-08-24 16:41:24,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,473 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 416 transitions. [2023-08-24 16:41:24,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2023-08-24 16:41:24,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 16:41:24,474 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2023-08-24 16:41:24,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=46, 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=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-08-24 16:41:24,475 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-08-24 16:41:24,475 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2023-08-24 16:41:24,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:24,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:24,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 16:41:24,476 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:24,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1767514530, now seen corresponding path program 1 times [2023-08-24 16:41:24,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:24,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588411619] [2023-08-24 16:41:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:24,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:24,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:24,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588411619] [2023-08-24 16:41:24,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588411619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:41:24,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:41:24,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:41:24,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946669881] [2023-08-24 16:41:24,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:41:24,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:41:24,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:24,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:41:24,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:41:24,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:41:24,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:24,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:41:24,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:24,763 INFO L124 PetriNetUnfolderBase]: 85/170 cut-off events. [2023-08-24 16:41:24,763 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-24 16:41:24,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 170 events. 85/170 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 567 event pairs, 26 based on Foata normal form. 12/181 useless extension candidates. Maximal degree in co-relation 386. Up to 87 conditions per place. [2023-08-24 16:41:24,767 INFO L140 encePairwiseOnDemand]: 326/331 looper letters, 31 selfloop transitions, 4 changer transitions 8/43 dead transitions. [2023-08-24 16:41:24,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 212 flow [2023-08-24 16:41:24,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:41:24,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:41:24,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 676 transitions. [2023-08-24 16:41:24,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40845921450151057 [2023-08-24 16:41:24,770 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 676 transitions. [2023-08-24 16:41:24,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 676 transitions. [2023-08-24 16:41:24,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:24,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 676 transitions. [2023-08-24 16:41:24,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 331.0) internal successors, (1986), 6 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,777 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 331.0) internal successors, (1986), 6 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,777 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 5 states and 676 transitions. [2023-08-24 16:41:24,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 212 flow [2023-08-24 16:41:24,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 16:41:24,779 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 93 flow [2023-08-24 16:41:24,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-24 16:41:24,780 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-08-24 16:41:24,784 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 93 flow [2023-08-24 16:41:24,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:24,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:24,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 16:41:24,785 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:24,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:24,786 INFO L85 PathProgramCache]: Analyzing trace with hash -505061632, now seen corresponding path program 2 times [2023-08-24 16:41:24,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:24,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576514101] [2023-08-24 16:41:24,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:24,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:24,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:24,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576514101] [2023-08-24 16:41:24,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576514101] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:41:24,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:41:24,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 16:41:24,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215653625] [2023-08-24 16:41:24,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:41:24,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 16:41:24,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:24,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 16:41:24,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 16:41:24,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 331 [2023-08-24 16:41:24,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:24,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:24,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 331 [2023-08-24 16:41:24,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:25,026 INFO L124 PetriNetUnfolderBase]: 85/163 cut-off events. [2023-08-24 16:41:25,026 INFO L125 PetriNetUnfolderBase]: For 138/150 co-relation queries the response was YES. [2023-08-24 16:41:25,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 163 events. 85/163 cut-off events. For 138/150 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 512 event pairs, 24 based on Foata normal form. 7/168 useless extension candidates. Maximal degree in co-relation 474. Up to 104 conditions per place. [2023-08-24 16:41:25,028 INFO L140 encePairwiseOnDemand]: 327/331 looper letters, 26 selfloop transitions, 4 changer transitions 4/35 dead transitions. [2023-08-24 16:41:25,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 206 flow [2023-08-24 16:41:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 16:41:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 16:41:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 560 transitions. [2023-08-24 16:41:25,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229607250755287 [2023-08-24 16:41:25,031 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 560 transitions. [2023-08-24 16:41:25,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 560 transitions. [2023-08-24 16:41:25,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:25,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 560 transitions. [2023-08-24 16:41:25,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:25,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 331.0) internal successors, (1655), 5 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:25,036 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 331.0) internal successors, (1655), 5 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:25,036 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 93 flow. Second operand 4 states and 560 transitions. [2023-08-24 16:41:25,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 206 flow [2023-08-24 16:41:25,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 193 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-24 16:41:25,040 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 112 flow [2023-08-24 16:41:25,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-08-24 16:41:25,041 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-08-24 16:41:25,041 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 112 flow [2023-08-24 16:41:25,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:25,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:25,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:25,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 16:41:25,042 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:25,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:25,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1330559435, now seen corresponding path program 1 times [2023-08-24 16:41:25,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:25,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729273621] [2023-08-24 16:41:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:25,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:25,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:25,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729273621] [2023-08-24 16:41:25,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729273621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:41:25,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:41:25,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:41:25,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552408580] [2023-08-24 16:41:25,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:41:25,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:41:25,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:25,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:41:25,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:41:25,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:41:25,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:25,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:25,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:41:25,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:25,272 INFO L124 PetriNetUnfolderBase]: 95/188 cut-off events. [2023-08-24 16:41:25,274 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-08-24 16:41:25,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 188 events. 95/188 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 629 event pairs, 26 based on Foata normal form. 2/189 useless extension candidates. Maximal degree in co-relation 568. Up to 93 conditions per place. [2023-08-24 16:41:25,281 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 31 selfloop transitions, 9 changer transitions 10/50 dead transitions. [2023-08-24 16:41:25,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 50 transitions, 309 flow [2023-08-24 16:41:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 16:41:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 16:41:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 807 transitions. [2023-08-24 16:41:25,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40634441087613293 [2023-08-24 16:41:25,284 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 807 transitions. [2023-08-24 16:41:25,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 807 transitions. [2023-08-24 16:41:25,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:25,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 807 transitions. [2023-08-24 16:41:25,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 134.5) internal successors, (807), 6 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:25,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 331.0) internal successors, (2317), 7 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:25,292 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 331.0) internal successors, (2317), 7 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:25,292 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 112 flow. Second operand 6 states and 807 transitions. [2023-08-24 16:41:25,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 50 transitions, 309 flow [2023-08-24 16:41:25,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 50 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 16:41:25,299 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 163 flow [2023-08-24 16:41:25,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-08-24 16:41:25,300 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2023-08-24 16:41:25,300 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 163 flow [2023-08-24 16:41:25,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:25,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:25,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:25,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 16:41:25,301 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:25,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:25,301 INFO L85 PathProgramCache]: Analyzing trace with hash -2054275559, now seen corresponding path program 2 times [2023-08-24 16:41:25,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:25,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538677152] [2023-08-24 16:41:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:25,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:25,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:25,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538677152] [2023-08-24 16:41:25,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538677152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:25,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050332947] [2023-08-24 16:41:25,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:41:25,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:25,441 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:25,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 16:41:25,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:41:25,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:41:25,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 16:41:25,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:25,629 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 16:41:25,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050332947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:41:25,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 16:41:25,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2023-08-24 16:41:25,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254389499] [2023-08-24 16:41:25,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:41:25,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 16:41:25,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:25,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 16:41:25,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:41:25,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 331 [2023-08-24 16:41:25,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:25,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:25,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 331 [2023-08-24 16:41:25,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:25,706 INFO L124 PetriNetUnfolderBase]: 83/163 cut-off events. [2023-08-24 16:41:25,706 INFO L125 PetriNetUnfolderBase]: For 304/316 co-relation queries the response was YES. [2023-08-24 16:41:25,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 163 events. 83/163 cut-off events. For 304/316 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 513 event pairs, 16 based on Foata normal form. 12/171 useless extension candidates. Maximal degree in co-relation 601. Up to 104 conditions per place. [2023-08-24 16:41:25,708 INFO L140 encePairwiseOnDemand]: 327/331 looper letters, 30 selfloop transitions, 6 changer transitions 4/42 dead transitions. [2023-08-24 16:41:25,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 42 transitions, 302 flow [2023-08-24 16:41:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 16:41:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 16:41:25,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 554 transitions. [2023-08-24 16:41:25,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41842900302114805 [2023-08-24 16:41:25,710 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 554 transitions. [2023-08-24 16:41:25,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 554 transitions. [2023-08-24 16:41:25,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:25,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 554 transitions. [2023-08-24 16:41:25,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:25,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 331.0) internal successors, (1655), 5 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:25,715 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 331.0) internal successors, (1655), 5 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:25,715 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 163 flow. Second operand 4 states and 554 transitions. [2023-08-24 16:41:25,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 42 transitions, 302 flow [2023-08-24 16:41:25,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 284 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-24 16:41:25,718 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 184 flow [2023-08-24 16:41:25,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-08-24 16:41:25,719 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2023-08-24 16:41:25,719 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 184 flow [2023-08-24 16:41:25,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:25,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:25,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:25,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 16:41:25,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-24 16:41:25,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:25,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:25,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1182712319, now seen corresponding path program 3 times [2023-08-24 16:41:25,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:25,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146449617] [2023-08-24 16:41:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:25,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:26,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:26,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146449617] [2023-08-24 16:41:26,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146449617] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:41:26,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:41:26,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:41:26,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986295726] [2023-08-24 16:41:26,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:41:26,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:41:26,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:26,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:41:26,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:41:26,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:41:26,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:26,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:26,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:41:26,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:26,173 INFO L124 PetriNetUnfolderBase]: 113/217 cut-off events. [2023-08-24 16:41:26,173 INFO L125 PetriNetUnfolderBase]: For 508/508 co-relation queries the response was YES. [2023-08-24 16:41:26,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870 conditions, 217 events. 113/217 cut-off events. For 508/508 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 703 event pairs, 42 based on Foata normal form. 2/218 useless extension candidates. Maximal degree in co-relation 845. Up to 139 conditions per place. [2023-08-24 16:41:26,175 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 32 selfloop transitions, 10 changer transitions 8/50 dead transitions. [2023-08-24 16:41:26,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 396 flow [2023-08-24 16:41:26,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:41:26,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:41:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 674 transitions. [2023-08-24 16:41:26,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725075528700905 [2023-08-24 16:41:26,177 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 674 transitions. [2023-08-24 16:41:26,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 674 transitions. [2023-08-24 16:41:26,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:26,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 674 transitions. [2023-08-24 16:41:26,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:26,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 331.0) internal successors, (1986), 6 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:26,182 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 331.0) internal successors, (1986), 6 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:26,182 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 184 flow. Second operand 5 states and 674 transitions. [2023-08-24 16:41:26,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 396 flow [2023-08-24 16:41:26,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 386 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 16:41:26,186 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 256 flow [2023-08-24 16:41:26,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-08-24 16:41:26,186 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-08-24 16:41:26,187 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 256 flow [2023-08-24 16:41:26,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:26,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:26,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:26,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 16:41:26,187 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:26,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:26,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1228919134, now seen corresponding path program 3 times [2023-08-24 16:41:26,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:26,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485486355] [2023-08-24 16:41:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:26,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:26,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:26,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485486355] [2023-08-24 16:41:26,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485486355] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:41:26,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:41:26,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:41:26,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662805658] [2023-08-24 16:41:26,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:41:26,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:41:26,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:26,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:41:26,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:41:26,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:41:26,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 256 flow. Second operand has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:26,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:26,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:41:26,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:26,354 INFO L124 PetriNetUnfolderBase]: 104/191 cut-off events. [2023-08-24 16:41:26,354 INFO L125 PetriNetUnfolderBase]: For 660/660 co-relation queries the response was YES. [2023-08-24 16:41:26,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 191 events. 104/191 cut-off events. For 660/660 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 561 event pairs, 36 based on Foata normal form. 4/194 useless extension candidates. Maximal degree in co-relation 850. Up to 141 conditions per place. [2023-08-24 16:41:26,356 INFO L140 encePairwiseOnDemand]: 326/331 looper letters, 29 selfloop transitions, 13 changer transitions 3/45 dead transitions. [2023-08-24 16:41:26,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 407 flow [2023-08-24 16:41:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:41:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:41:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 670 transitions. [2023-08-24 16:41:26,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40483383685800606 [2023-08-24 16:41:26,359 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 670 transitions. [2023-08-24 16:41:26,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 670 transitions. [2023-08-24 16:41:26,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:26,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 670 transitions. [2023-08-24 16:41:26,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:26,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 331.0) internal successors, (1986), 6 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:26,364 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 331.0) internal successors, (1986), 6 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:26,364 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 256 flow. Second operand 5 states and 670 transitions. [2023-08-24 16:41:26,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 407 flow [2023-08-24 16:41:26,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 381 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-24 16:41:26,368 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 276 flow [2023-08-24 16:41:26,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2023-08-24 16:41:26,370 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-08-24 16:41:26,371 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 276 flow [2023-08-24 16:41:26,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:26,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:26,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:26,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 16:41:26,371 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:26,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:26,372 INFO L85 PathProgramCache]: Analyzing trace with hash -377697469, now seen corresponding path program 4 times [2023-08-24 16:41:26,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:26,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035210642] [2023-08-24 16:41:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:26,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:26,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:26,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035210642] [2023-08-24 16:41:26,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035210642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:26,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236136408] [2023-08-24 16:41:26,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:41:26,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:26,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:26,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:26,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 16:41:26,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:41:26,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:41:26,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 16:41:26,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:26,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:26,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236136408] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:26,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:26,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-08-24 16:41:26,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693882386] [2023-08-24 16:41:26,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:26,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 16:41:26,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:26,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 16:41:26,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-24 16:41:26,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:41:26,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 276 flow. Second operand has 7 states, 7 states have (on average 130.14285714285714) internal successors, (911), 7 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:26,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:26,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:41:26,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:26,815 INFO L124 PetriNetUnfolderBase]: 117/210 cut-off events. [2023-08-24 16:41:26,816 INFO L125 PetriNetUnfolderBase]: For 716/716 co-relation queries the response was YES. [2023-08-24 16:41:26,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 961 conditions, 210 events. 117/210 cut-off events. For 716/716 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 642 event pairs, 24 based on Foata normal form. 6/215 useless extension candidates. Maximal degree in co-relation 933. Up to 131 conditions per place. [2023-08-24 16:41:26,818 INFO L140 encePairwiseOnDemand]: 326/331 looper letters, 40 selfloop transitions, 18 changer transitions 0/58 dead transitions. [2023-08-24 16:41:26,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 494 flow [2023-08-24 16:41:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 16:41:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 16:41:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 937 transitions. [2023-08-24 16:41:26,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40440224428139837 [2023-08-24 16:41:26,821 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 937 transitions. [2023-08-24 16:41:26,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 937 transitions. [2023-08-24 16:41:26,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:26,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 937 transitions. [2023-08-24 16:41:26,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 133.85714285714286) internal successors, (937), 7 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:26,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 331.0) internal successors, (2648), 8 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:26,828 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 331.0) internal successors, (2648), 8 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:26,828 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 276 flow. Second operand 7 states and 937 transitions. [2023-08-24 16:41:26,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 494 flow [2023-08-24 16:41:26,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 464 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-24 16:41:26,831 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 318 flow [2023-08-24 16:41:26,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=318, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2023-08-24 16:41:26,832 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2023-08-24 16:41:26,832 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 318 flow [2023-08-24 16:41:26,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 130.14285714285714) internal successors, (911), 7 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:26,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:26,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:26,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-24 16:41:27,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-24 16:41:27,038 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:27,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:27,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1397016515, now seen corresponding path program 5 times [2023-08-24 16:41:27,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:27,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132018423] [2023-08-24 16:41:27,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:27,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:27,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:27,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132018423] [2023-08-24 16:41:27,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132018423] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:41:27,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:41:27,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:41:27,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567223701] [2023-08-24 16:41:27,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:41:27,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:41:27,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:27,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:41:27,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:41:27,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:41:27,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 318 flow. Second operand has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:27,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:27,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:41:27,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:27,207 INFO L124 PetriNetUnfolderBase]: 113/206 cut-off events. [2023-08-24 16:41:27,208 INFO L125 PetriNetUnfolderBase]: For 922/922 co-relation queries the response was YES. [2023-08-24 16:41:27,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1014 conditions, 206 events. 113/206 cut-off events. For 922/922 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 617 event pairs, 31 based on Foata normal form. 4/209 useless extension candidates. Maximal degree in co-relation 985. Up to 136 conditions per place. [2023-08-24 16:41:27,210 INFO L140 encePairwiseOnDemand]: 326/331 looper letters, 38 selfloop transitions, 11 changer transitions 2/51 dead transitions. [2023-08-24 16:41:27,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 482 flow [2023-08-24 16:41:27,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:41:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:41:27,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 670 transitions. [2023-08-24 16:41:27,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40483383685800606 [2023-08-24 16:41:27,212 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 670 transitions. [2023-08-24 16:41:27,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 670 transitions. [2023-08-24 16:41:27,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:27,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 670 transitions. [2023-08-24 16:41:27,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:27,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 331.0) internal successors, (1986), 6 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:27,217 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 331.0) internal successors, (1986), 6 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:27,217 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 318 flow. Second operand 5 states and 670 transitions. [2023-08-24 16:41:27,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 482 flow [2023-08-24 16:41:27,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 51 transitions, 449 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-24 16:41:27,221 INFO L231 Difference]: Finished difference. Result has 52 places, 38 transitions, 339 flow [2023-08-24 16:41:27,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=52, PETRI_TRANSITIONS=38} [2023-08-24 16:41:27,222 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-08-24 16:41:27,222 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 38 transitions, 339 flow [2023-08-24 16:41:27,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:27,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:27,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:27,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 16:41:27,223 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:27,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:27,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1651458281, now seen corresponding path program 6 times [2023-08-24 16:41:27,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:27,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402128907] [2023-08-24 16:41:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:27,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:27,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:27,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402128907] [2023-08-24 16:41:27,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402128907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:27,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360284934] [2023-08-24 16:41:27,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:41:27,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:27,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:27,325 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:27,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 16:41:27,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 16:41:27,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:41:27,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 16:41:27,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:27,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:27,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360284934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:27,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:27,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-24 16:41:27,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417580233] [2023-08-24 16:41:27,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:27,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 16:41:27,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:27,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 16:41:27,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-24 16:41:27,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:41:27,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 38 transitions, 339 flow. Second operand has 9 states, 9 states have (on average 129.77777777777777) internal successors, (1168), 9 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:27,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:27,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:41:27,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:27,646 INFO L124 PetriNetUnfolderBase]: 106/189 cut-off events. [2023-08-24 16:41:27,646 INFO L125 PetriNetUnfolderBase]: For 1023/1023 co-relation queries the response was YES. [2023-08-24 16:41:27,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 189 events. 106/189 cut-off events. For 1023/1023 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 535 event pairs, 31 based on Foata normal form. 6/194 useless extension candidates. Maximal degree in co-relation 965. Up to 136 conditions per place. [2023-08-24 16:41:27,648 INFO L140 encePairwiseOnDemand]: 326/331 looper letters, 33 selfloop transitions, 14 changer transitions 1/48 dead transitions. [2023-08-24 16:41:27,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 469 flow [2023-08-24 16:41:27,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:41:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:41:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 670 transitions. [2023-08-24 16:41:27,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40483383685800606 [2023-08-24 16:41:27,651 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 670 transitions. [2023-08-24 16:41:27,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 670 transitions. [2023-08-24 16:41:27,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:27,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 670 transitions. [2023-08-24 16:41:27,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:27,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 331.0) internal successors, (1986), 6 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:27,656 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 331.0) internal successors, (1986), 6 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:27,656 INFO L175 Difference]: Start difference. First operand has 52 places, 38 transitions, 339 flow. Second operand 5 states and 670 transitions. [2023-08-24 16:41:27,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 469 flow [2023-08-24 16:41:27,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 443 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-24 16:41:27,661 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 329 flow [2023-08-24 16:41:27,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=329, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2023-08-24 16:41:27,661 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 32 predicate places. [2023-08-24 16:41:27,662 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 329 flow [2023-08-24 16:41:27,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 129.77777777777777) internal successors, (1168), 9 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:27,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:27,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:27,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 16:41:27,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:27,867 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:27,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:27,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1851798860, now seen corresponding path program 1 times [2023-08-24 16:41:27,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:27,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790861631] [2023-08-24 16:41:27,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:27,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 16:41:28,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:28,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790861631] [2023-08-24 16:41:28,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790861631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:28,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522007127] [2023-08-24 16:41:28,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:28,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:28,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:28,003 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:28,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 16:41:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:28,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 16:41:28,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:28,248 INFO L322 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2023-08-24 16:41:28,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2023-08-24 16:41:28,272 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 16:41:28,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:28,385 INFO L322 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-08-24 16:41:28,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 45 [2023-08-24 16:41:28,531 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 16:41:28,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522007127] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:28,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:28,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2023-08-24 16:41:28,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734944468] [2023-08-24 16:41:28,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:28,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 16:41:28,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:28,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 16:41:28,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-24 16:41:28,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 331 [2023-08-24 16:41:28,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 329 flow. Second operand has 13 states, 13 states have (on average 97.3076923076923) internal successors, (1265), 13 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:28,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:28,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 331 [2023-08-24 16:41:28,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:29,019 INFO L124 PetriNetUnfolderBase]: 263/466 cut-off events. [2023-08-24 16:41:29,019 INFO L125 PetriNetUnfolderBase]: For 2137/2175 co-relation queries the response was YES. [2023-08-24 16:41:29,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2380 conditions, 466 events. 263/466 cut-off events. For 2137/2175 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1889 event pairs, 6 based on Foata normal form. 53/513 useless extension candidates. Maximal degree in co-relation 2073. Up to 235 conditions per place. [2023-08-24 16:41:29,022 INFO L140 encePairwiseOnDemand]: 322/331 looper letters, 39 selfloop transitions, 22 changer transitions 70/134 dead transitions. [2023-08-24 16:41:29,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 134 transitions, 1261 flow [2023-08-24 16:41:29,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 16:41:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 16:41:29,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1892 transitions. [2023-08-24 16:41:29,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3008427412943234 [2023-08-24 16:41:29,029 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1892 transitions. [2023-08-24 16:41:29,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1892 transitions. [2023-08-24 16:41:29,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:29,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1892 transitions. [2023-08-24 16:41:29,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 99.57894736842105) internal successors, (1892), 19 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:29,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 331.0) internal successors, (6620), 20 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:29,043 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 331.0) internal successors, (6620), 20 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:29,043 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 329 flow. Second operand 19 states and 1892 transitions. [2023-08-24 16:41:29,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 134 transitions, 1261 flow [2023-08-24 16:41:29,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 134 transitions, 1139 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-24 16:41:29,050 INFO L231 Difference]: Finished difference. Result has 71 places, 44 transitions, 441 flow [2023-08-24 16:41:29,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=441, PETRI_PLACES=71, PETRI_TRANSITIONS=44} [2023-08-24 16:41:29,050 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 50 predicate places. [2023-08-24 16:41:29,051 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 44 transitions, 441 flow [2023-08-24 16:41:29,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 97.3076923076923) internal successors, (1265), 13 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:29,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:29,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:29,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 16:41:29,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:29,257 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:29,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:29,257 INFO L85 PathProgramCache]: Analyzing trace with hash -59504810, now seen corresponding path program 2 times [2023-08-24 16:41:29,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:29,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668350201] [2023-08-24 16:41:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:29,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:41:29,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:29,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668350201] [2023-08-24 16:41:29,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668350201] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:29,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561768096] [2023-08-24 16:41:29,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:41:29,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:29,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:29,938 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:29,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 16:41:30,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:41:30,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:41:30,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 16:41:30,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:30,204 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:41:30,213 INFO L322 Elim1Store]: treesize reduction 15, result has 31.8 percent of original size [2023-08-24 16:41:30,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 24 [2023-08-24 16:41:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:41:30,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:30,341 INFO L322 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-08-24 16:41:30,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 45 [2023-08-24 16:41:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:41:30,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561768096] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:30,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:30,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 16 [2023-08-24 16:41:30,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33361048] [2023-08-24 16:41:30,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:30,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:41:30,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:30,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:41:30,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:41:30,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 331 [2023-08-24 16:41:30,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 44 transitions, 441 flow. Second operand has 18 states, 18 states have (on average 102.33333333333333) internal successors, (1842), 18 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:30,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:30,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 331 [2023-08-24 16:41:30,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:30,644 INFO L124 PetriNetUnfolderBase]: 159/294 cut-off events. [2023-08-24 16:41:30,645 INFO L125 PetriNetUnfolderBase]: For 2012/2065 co-relation queries the response was YES. [2023-08-24 16:41:30,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1813 conditions, 294 events. 159/294 cut-off events. For 2012/2065 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1047 event pairs, 20 based on Foata normal form. 20/302 useless extension candidates. Maximal degree in co-relation 1785. Up to 174 conditions per place. [2023-08-24 16:41:30,647 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 28 selfloop transitions, 9 changer transitions 26/69 dead transitions. [2023-08-24 16:41:30,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 760 flow [2023-08-24 16:41:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 16:41:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 16:41:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 843 transitions. [2023-08-24 16:41:30,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3183534743202417 [2023-08-24 16:41:30,651 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 843 transitions. [2023-08-24 16:41:30,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 843 transitions. [2023-08-24 16:41:30,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:30,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 843 transitions. [2023-08-24 16:41:30,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 105.375) internal successors, (843), 8 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:30,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 331.0) internal successors, (2979), 9 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:30,656 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 331.0) internal successors, (2979), 9 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:30,656 INFO L175 Difference]: Start difference. First operand has 71 places, 44 transitions, 441 flow. Second operand 8 states and 843 transitions. [2023-08-24 16:41:30,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 760 flow [2023-08-24 16:41:30,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 69 transitions, 635 flow, removed 50 selfloop flow, removed 9 redundant places. [2023-08-24 16:41:30,663 INFO L231 Difference]: Finished difference. Result has 64 places, 40 transitions, 354 flow [2023-08-24 16:41:30,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=354, PETRI_PLACES=64, PETRI_TRANSITIONS=40} [2023-08-24 16:41:30,664 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2023-08-24 16:41:30,664 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 40 transitions, 354 flow [2023-08-24 16:41:30,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 102.33333333333333) internal successors, (1842), 18 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:30,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:30,665 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:30,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 16:41:30,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 16:41:30,873 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:30,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:30,873 INFO L85 PathProgramCache]: Analyzing trace with hash -284591643, now seen corresponding path program 3 times [2023-08-24 16:41:30,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:30,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191447026] [2023-08-24 16:41:30,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:30,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:41:31,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:31,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191447026] [2023-08-24 16:41:31,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191447026] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:31,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13616566] [2023-08-24 16:41:31,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:41:31,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:31,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:31,593 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:31,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 16:41:31,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 16:41:31,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:41:31,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 16:41:31,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:31,822 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:41:31,822 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-24 16:41:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:31,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:31,911 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-24 16:41:31,912 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-24 16:41:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:41:31,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13616566] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:31,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:31,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 3] total 15 [2023-08-24 16:41:31,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388152757] [2023-08-24 16:41:31,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:31,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:41:31,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:31,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:41:31,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:41:31,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 331 [2023-08-24 16:41:31,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 40 transitions, 354 flow. Second operand has 17 states, 17 states have (on average 106.23529411764706) internal successors, (1806), 17 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:31,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:31,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 331 [2023-08-24 16:41:31,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:32,404 INFO L124 PetriNetUnfolderBase]: 265/473 cut-off events. [2023-08-24 16:41:32,404 INFO L125 PetriNetUnfolderBase]: For 1934/2001 co-relation queries the response was YES. [2023-08-24 16:41:32,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2586 conditions, 473 events. 265/473 cut-off events. For 1934/2001 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1843 event pairs, 12 based on Foata normal form. 28/484 useless extension candidates. Maximal degree in co-relation 2555. Up to 236 conditions per place. [2023-08-24 16:41:32,409 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 65 selfloop transitions, 49 changer transitions 1/121 dead transitions. [2023-08-24 16:41:32,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 121 transitions, 1172 flow [2023-08-24 16:41:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 16:41:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 16:41:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1539 transitions. [2023-08-24 16:41:32,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33211048769961155 [2023-08-24 16:41:32,414 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1539 transitions. [2023-08-24 16:41:32,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1539 transitions. [2023-08-24 16:41:32,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:32,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1539 transitions. [2023-08-24 16:41:32,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 109.92857142857143) internal successors, (1539), 14 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:32,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 331.0) internal successors, (4965), 15 states have internal predecessors, (4965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:32,424 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 331.0) internal successors, (4965), 15 states have internal predecessors, (4965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:32,424 INFO L175 Difference]: Start difference. First operand has 64 places, 40 transitions, 354 flow. Second operand 14 states and 1539 transitions. [2023-08-24 16:41:32,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 121 transitions, 1172 flow [2023-08-24 16:41:32,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 121 transitions, 1114 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-08-24 16:41:32,431 INFO L231 Difference]: Finished difference. Result has 67 places, 82 transitions, 885 flow [2023-08-24 16:41:32,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=885, PETRI_PLACES=67, PETRI_TRANSITIONS=82} [2023-08-24 16:41:32,432 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-08-24 16:41:32,432 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 82 transitions, 885 flow [2023-08-24 16:41:32,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 106.23529411764706) internal successors, (1806), 17 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:32,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:32,433 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:32,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 16:41:32,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:32,640 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:32,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash -2044935495, now seen corresponding path program 4 times [2023-08-24 16:41:32,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:32,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992666886] [2023-08-24 16:41:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:32,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:41:33,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:33,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992666886] [2023-08-24 16:41:33,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992666886] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:33,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693713557] [2023-08-24 16:41:33,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:41:33,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:33,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:33,188 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:33,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 16:41:33,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:41:33,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:41:33,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 16:41:33,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:33,434 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:41:33,434 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-24 16:41:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:33,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:33,523 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-24 16:41:33,523 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-24 16:41:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:41:33,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693713557] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:33,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:33,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 3] total 15 [2023-08-24 16:41:33,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668315399] [2023-08-24 16:41:33,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:33,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:41:33,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:33,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:41:33,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:41:33,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 331 [2023-08-24 16:41:33,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 82 transitions, 885 flow. Second operand has 17 states, 17 states have (on average 106.23529411764706) internal successors, (1806), 17 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:33,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:33,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 331 [2023-08-24 16:41:33,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:33,948 INFO L124 PetriNetUnfolderBase]: 325/583 cut-off events. [2023-08-24 16:41:33,948 INFO L125 PetriNetUnfolderBase]: For 2925/2986 co-relation queries the response was YES. [2023-08-24 16:41:33,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3298 conditions, 583 events. 325/583 cut-off events. For 2925/2986 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2407 event pairs, 33 based on Foata normal form. 22/588 useless extension candidates. Maximal degree in co-relation 2953. Up to 423 conditions per place. [2023-08-24 16:41:33,954 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 79 selfloop transitions, 39 changer transitions 1/125 dead transitions. [2023-08-24 16:41:33,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 125 transitions, 1372 flow [2023-08-24 16:41:33,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 16:41:33,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 16:41:33,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1531 transitions. [2023-08-24 16:41:33,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33038411739318085 [2023-08-24 16:41:33,959 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1531 transitions. [2023-08-24 16:41:33,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1531 transitions. [2023-08-24 16:41:33,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:33,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1531 transitions. [2023-08-24 16:41:33,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 109.35714285714286) internal successors, (1531), 14 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:33,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 331.0) internal successors, (4965), 15 states have internal predecessors, (4965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:33,969 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 331.0) internal successors, (4965), 15 states have internal predecessors, (4965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:33,970 INFO L175 Difference]: Start difference. First operand has 67 places, 82 transitions, 885 flow. Second operand 14 states and 1531 transitions. [2023-08-24 16:41:33,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 125 transitions, 1372 flow [2023-08-24 16:41:33,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 125 transitions, 1264 flow, removed 52 selfloop flow, removed 2 redundant places. [2023-08-24 16:41:33,979 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 988 flow [2023-08-24 16:41:33,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=988, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2023-08-24 16:41:33,980 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 58 predicate places. [2023-08-24 16:41:33,980 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 988 flow [2023-08-24 16:41:33,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 106.23529411764706) internal successors, (1806), 17 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:33,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:33,980 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:33,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 16:41:34,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:34,187 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:34,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:34,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1087321851, now seen corresponding path program 5 times [2023-08-24 16:41:34,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:34,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185793339] [2023-08-24 16:41:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:34,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:41:35,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:35,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185793339] [2023-08-24 16:41:35,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185793339] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:35,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401023054] [2023-08-24 16:41:35,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:41:35,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:35,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:35,400 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:35,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 16:41:35,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:41:35,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:41:35,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 16:41:35,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:35,693 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:41:35,712 INFO L322 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2023-08-24 16:41:35,712 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 31 [2023-08-24 16:41:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:35,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:35,818 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-24 16:41:35,819 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-24 16:41:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:35,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401023054] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:35,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:35,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 16 [2023-08-24 16:41:35,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610882702] [2023-08-24 16:41:35,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:35,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:41:35,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:35,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:41:35,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:41:35,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 331 [2023-08-24 16:41:35,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 988 flow. Second operand has 18 states, 18 states have (on average 99.22222222222223) internal successors, (1786), 18 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:35,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:35,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 331 [2023-08-24 16:41:35,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:36,605 INFO L124 PetriNetUnfolderBase]: 413/740 cut-off events. [2023-08-24 16:41:36,605 INFO L125 PetriNetUnfolderBase]: For 3782/3851 co-relation queries the response was YES. [2023-08-24 16:41:36,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4094 conditions, 740 events. 413/740 cut-off events. For 3782/3851 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3322 event pairs, 59 based on Foata normal form. 30/754 useless extension candidates. Maximal degree in co-relation 3524. Up to 560 conditions per place. [2023-08-24 16:41:36,613 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 101 selfloop transitions, 32 changer transitions 1/140 dead transitions. [2023-08-24 16:41:36,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 140 transitions, 1596 flow [2023-08-24 16:41:36,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 16:41:36,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 16:41:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1330 transitions. [2023-08-24 16:41:36,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3090866837090402 [2023-08-24 16:41:36,616 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1330 transitions. [2023-08-24 16:41:36,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1330 transitions. [2023-08-24 16:41:36,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:36,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1330 transitions. [2023-08-24 16:41:36,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 102.3076923076923) internal successors, (1330), 13 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:36,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 331.0) internal successors, (4634), 14 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:36,626 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 331.0) internal successors, (4634), 14 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:36,626 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 988 flow. Second operand 13 states and 1330 transitions. [2023-08-24 16:41:36,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 140 transitions, 1596 flow [2023-08-24 16:41:36,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 140 transitions, 1487 flow, removed 35 selfloop flow, removed 7 redundant places. [2023-08-24 16:41:36,638 INFO L231 Difference]: Finished difference. Result has 88 places, 108 transitions, 1184 flow [2023-08-24 16:41:36,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1184, PETRI_PLACES=88, PETRI_TRANSITIONS=108} [2023-08-24 16:41:36,640 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-08-24 16:41:36,640 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 108 transitions, 1184 flow [2023-08-24 16:41:36,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.22222222222223) internal successors, (1786), 18 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:36,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:36,641 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:36,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 16:41:36,845 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,SelfDestructingSolverStorable15 [2023-08-24 16:41:36,845 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:36,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:36,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1507189255, now seen corresponding path program 6 times [2023-08-24 16:41:36,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:36,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533172423] [2023-08-24 16:41:36,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:36,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:41:37,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:37,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533172423] [2023-08-24 16:41:37,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533172423] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:37,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327036728] [2023-08-24 16:41:37,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:41:37,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:37,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:37,795 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:37,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 16:41:37,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 16:41:37,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:41:37,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 16:41:37,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:38,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:41:38,066 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 20 treesize of output 20 [2023-08-24 16:41:38,117 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:41:38,117 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-24 16:41:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:38,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:38,221 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_405 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_405) c_~f~0.base))) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4)))) (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)))) is different from false [2023-08-24 16:41:38,249 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:41:38,250 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 108 [2023-08-24 16:41:38,260 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:41:38,261 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2023-08-24 16:41:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-08-24 16:41:38,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327036728] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:38,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:38,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-08-24 16:41:38,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449175107] [2023-08-24 16:41:38,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:38,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 16:41:38,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:38,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 16:41:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=311, Unknown=10, NotChecked=36, Total=420 [2023-08-24 16:41:38,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 331 [2023-08-24 16:41:38,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 108 transitions, 1184 flow. Second operand has 21 states, 21 states have (on average 98.80952380952381) internal successors, (2075), 21 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:38,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:38,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 331 [2023-08-24 16:41:38,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:39,239 INFO L124 PetriNetUnfolderBase]: 575/1026 cut-off events. [2023-08-24 16:41:39,239 INFO L125 PetriNetUnfolderBase]: For 5121/5222 co-relation queries the response was YES. [2023-08-24 16:41:39,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5688 conditions, 1026 events. 575/1026 cut-off events. For 5121/5222 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4878 event pairs, 61 based on Foata normal form. 37/1041 useless extension candidates. Maximal degree in co-relation 5224. Up to 616 conditions per place. [2023-08-24 16:41:39,250 INFO L140 encePairwiseOnDemand]: 321/331 looper letters, 98 selfloop transitions, 75 changer transitions 2/181 dead transitions. [2023-08-24 16:41:39,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 181 transitions, 2124 flow [2023-08-24 16:41:39,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 16:41:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 16:41:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1642 transitions. [2023-08-24 16:41:39,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3100453172205438 [2023-08-24 16:41:39,253 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1642 transitions. [2023-08-24 16:41:39,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1642 transitions. [2023-08-24 16:41:39,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:39,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1642 transitions. [2023-08-24 16:41:39,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 102.625) internal successors, (1642), 16 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:39,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 331.0) internal successors, (5627), 17 states have internal predecessors, (5627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:39,262 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 331.0) internal successors, (5627), 17 states have internal predecessors, (5627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:39,262 INFO L175 Difference]: Start difference. First operand has 88 places, 108 transitions, 1184 flow. Second operand 16 states and 1642 transitions. [2023-08-24 16:41:39,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 181 transitions, 2124 flow [2023-08-24 16:41:39,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 181 transitions, 2009 flow, removed 47 selfloop flow, removed 5 redundant places. [2023-08-24 16:41:39,276 INFO L231 Difference]: Finished difference. Result has 102 places, 143 transitions, 1734 flow [2023-08-24 16:41:39,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1734, PETRI_PLACES=102, PETRI_TRANSITIONS=143} [2023-08-24 16:41:39,277 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2023-08-24 16:41:39,277 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 143 transitions, 1734 flow [2023-08-24 16:41:39,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.80952380952381) internal successors, (2075), 21 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:39,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:39,278 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:39,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 16:41:39,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 16:41:39,483 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:39,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:39,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2019612061, now seen corresponding path program 7 times [2023-08-24 16:41:39,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:39,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348793167] [2023-08-24 16:41:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:39,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:41:40,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:40,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348793167] [2023-08-24 16:41:40,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348793167] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:40,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193752513] [2023-08-24 16:41:40,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:41:40,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:40,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:40,340 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:40,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 16:41:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:40,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 16:41:40,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:40,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:41:40,574 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 16:41:40,627 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:41:40,629 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-24 16:41:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:41:40,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:40,779 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:41:40,779 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-24 16:41:40,799 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:41:40,799 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-08-24 16:41:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:40,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193752513] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:40,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:40,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 18 [2023-08-24 16:41:40,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165947067] [2023-08-24 16:41:40,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:40,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 16:41:40,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:40,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 16:41:40,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=315, Unknown=3, NotChecked=0, Total=380 [2023-08-24 16:41:40,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 331 [2023-08-24 16:41:40,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 143 transitions, 1734 flow. Second operand has 20 states, 20 states have (on average 98.9) internal successors, (1978), 20 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:40,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:40,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 331 [2023-08-24 16:41:40,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:41,579 INFO L124 PetriNetUnfolderBase]: 629/1125 cut-off events. [2023-08-24 16:41:41,579 INFO L125 PetriNetUnfolderBase]: For 7556/7649 co-relation queries the response was YES. [2023-08-24 16:41:41,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6987 conditions, 1125 events. 629/1125 cut-off events. For 7556/7649 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5571 event pairs, 83 based on Foata normal form. 32/1139 useless extension candidates. Maximal degree in co-relation 6450. Up to 865 conditions per place. [2023-08-24 16:41:41,593 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 124 selfloop transitions, 51 changer transitions 1/182 dead transitions. [2023-08-24 16:41:41,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 182 transitions, 2404 flow [2023-08-24 16:41:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 16:41:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 16:41:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1332 transitions. [2023-08-24 16:41:41,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3095514757146177 [2023-08-24 16:41:41,600 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1332 transitions. [2023-08-24 16:41:41,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1332 transitions. [2023-08-24 16:41:41,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:41,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1332 transitions. [2023-08-24 16:41:41,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 102.46153846153847) internal successors, (1332), 13 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:41,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 331.0) internal successors, (4634), 14 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:41,612 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 331.0) internal successors, (4634), 14 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:41,612 INFO L175 Difference]: Start difference. First operand has 102 places, 143 transitions, 1734 flow. Second operand 13 states and 1332 transitions. [2023-08-24 16:41:41,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 182 transitions, 2404 flow [2023-08-24 16:41:41,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 182 transitions, 2225 flow, removed 79 selfloop flow, removed 5 redundant places. [2023-08-24 16:41:41,635 INFO L231 Difference]: Finished difference. Result has 111 places, 151 transitions, 1835 flow [2023-08-24 16:41:41,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1835, PETRI_PLACES=111, PETRI_TRANSITIONS=151} [2023-08-24 16:41:41,635 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 90 predicate places. [2023-08-24 16:41:41,635 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 151 transitions, 1835 flow [2023-08-24 16:41:41,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 98.9) internal successors, (1978), 20 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:41,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:41,636 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:41,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 16:41:41,841 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,SelfDestructingSolverStorable17 [2023-08-24 16:41:41,841 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:41,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:41,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1952345265, now seen corresponding path program 8 times [2023-08-24 16:41:41,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:41,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919394407] [2023-08-24 16:41:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:41,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:42,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:42,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919394407] [2023-08-24 16:41:42,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919394407] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:42,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732599270] [2023-08-24 16:41:42,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:41:42,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:42,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:42,009 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:42,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 16:41:42,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:41:42,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:41:42,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:41:42,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:42,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:42,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732599270] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:42,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:42,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-08-24 16:41:42,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989631182] [2023-08-24 16:41:42,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:42,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 16:41:42,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:42,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 16:41:42,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-24 16:41:42,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:41:42,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 151 transitions, 1835 flow. Second operand has 15 states, 15 states have (on average 129.33333333333334) internal successors, (1940), 15 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:42,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:42,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:41:42,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:43,095 INFO L124 PetriNetUnfolderBase]: 943/1695 cut-off events. [2023-08-24 16:41:43,095 INFO L125 PetriNetUnfolderBase]: For 10290/10290 co-relation queries the response was YES. [2023-08-24 16:41:43,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10247 conditions, 1695 events. 943/1695 cut-off events. For 10290/10290 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8935 event pairs, 151 based on Foata normal form. 12/1706 useless extension candidates. Maximal degree in co-relation 9622. Up to 690 conditions per place. [2023-08-24 16:41:43,115 INFO L140 encePairwiseOnDemand]: 326/331 looper letters, 175 selfloop transitions, 63 changer transitions 0/238 dead transitions. [2023-08-24 16:41:43,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 238 transitions, 3218 flow [2023-08-24 16:41:43,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 16:41:43,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 16:41:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1484 transitions. [2023-08-24 16:41:43,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075803350727822 [2023-08-24 16:41:43,118 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1484 transitions. [2023-08-24 16:41:43,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1484 transitions. [2023-08-24 16:41:43,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:43,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1484 transitions. [2023-08-24 16:41:43,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 134.9090909090909) internal successors, (1484), 11 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:43,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 331.0) internal successors, (3972), 12 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:43,124 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 331.0) internal successors, (3972), 12 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:43,124 INFO L175 Difference]: Start difference. First operand has 111 places, 151 transitions, 1835 flow. Second operand 11 states and 1484 transitions. [2023-08-24 16:41:43,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 238 transitions, 3218 flow [2023-08-24 16:41:43,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 238 transitions, 3007 flow, removed 80 selfloop flow, removed 8 redundant places. [2023-08-24 16:41:43,153 INFO L231 Difference]: Finished difference. Result has 120 places, 171 transitions, 2242 flow [2023-08-24 16:41:43,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2242, PETRI_PLACES=120, PETRI_TRANSITIONS=171} [2023-08-24 16:41:43,154 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 99 predicate places. [2023-08-24 16:41:43,154 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 171 transitions, 2242 flow [2023-08-24 16:41:43,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.33333333333334) internal successors, (1940), 15 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:43,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:43,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:43,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 16:41:43,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:43,360 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:43,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:43,360 INFO L85 PathProgramCache]: Analyzing trace with hash 150058556, now seen corresponding path program 9 times [2023-08-24 16:41:43,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:43,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465197586] [2023-08-24 16:41:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:43,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:43,575 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 16:41:43,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:43,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465197586] [2023-08-24 16:41:43,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465197586] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:43,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71065561] [2023-08-24 16:41:43,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:41:43,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:43,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:43,577 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:43,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 16:41:43,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 16:41:43,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:41:43,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:41:43,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:43,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:43,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71065561] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:43,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:43,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-08-24 16:41:43,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872945522] [2023-08-24 16:41:43,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:43,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:41:43,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:43,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:41:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:41:43,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:41:43,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 171 transitions, 2242 flow. Second operand has 17 states, 17 states have (on average 128.94117647058823) internal successors, (2192), 17 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:43,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:43,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:41:43,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:45,089 INFO L124 PetriNetUnfolderBase]: 974/1840 cut-off events. [2023-08-24 16:41:45,089 INFO L125 PetriNetUnfolderBase]: For 16825/16825 co-relation queries the response was YES. [2023-08-24 16:41:45,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11672 conditions, 1840 events. 974/1840 cut-off events. For 16825/16825 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10826 event pairs, 84 based on Foata normal form. 44/1883 useless extension candidates. Maximal degree in co-relation 11111. Up to 751 conditions per place. [2023-08-24 16:41:45,111 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 194 selfloop transitions, 125 changer transitions 39/358 dead transitions. [2023-08-24 16:41:45,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 358 transitions, 4921 flow [2023-08-24 16:41:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 16:41:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 16:41:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3048 transitions. [2023-08-24 16:41:45,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003677919348483 [2023-08-24 16:41:45,116 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3048 transitions. [2023-08-24 16:41:45,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3048 transitions. [2023-08-24 16:41:45,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:45,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3048 transitions. [2023-08-24 16:41:45,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 132.52173913043478) internal successors, (3048), 23 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:45,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 331.0) internal successors, (7944), 24 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:45,178 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 331.0) internal successors, (7944), 24 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:45,178 INFO L175 Difference]: Start difference. First operand has 120 places, 171 transitions, 2242 flow. Second operand 23 states and 3048 transitions. [2023-08-24 16:41:45,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 358 transitions, 4921 flow [2023-08-24 16:41:45,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 358 transitions, 4761 flow, removed 45 selfloop flow, removed 3 redundant places. [2023-08-24 16:41:45,223 INFO L231 Difference]: Finished difference. Result has 147 places, 234 transitions, 3343 flow [2023-08-24 16:41:45,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3343, PETRI_PLACES=147, PETRI_TRANSITIONS=234} [2023-08-24 16:41:45,224 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 126 predicate places. [2023-08-24 16:41:45,224 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 234 transitions, 3343 flow [2023-08-24 16:41:45,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 128.94117647058823) internal successors, (2192), 17 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:45,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:45,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:45,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 16:41:45,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:45,430 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:45,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:45,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1654191928, now seen corresponding path program 10 times [2023-08-24 16:41:45,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:45,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118282135] [2023-08-24 16:41:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:45,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:45,696 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 16:41:45,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:45,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118282135] [2023-08-24 16:41:45,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118282135] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:45,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122185760] [2023-08-24 16:41:45,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:41:45,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:45,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:45,698 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:45,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 16:41:45,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:41:45,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:41:45,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:41:45,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:45,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:46,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122185760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:46,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:46,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-24 16:41:46,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890426260] [2023-08-24 16:41:46,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:46,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 16:41:46,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:46,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 16:41:46,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-08-24 16:41:46,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:41:46,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 234 transitions, 3343 flow. Second operand has 19 states, 19 states have (on average 128.78947368421052) internal successors, (2447), 19 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:46,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:46,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:41:46,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:47,486 INFO L124 PetriNetUnfolderBase]: 875/1672 cut-off events. [2023-08-24 16:41:47,486 INFO L125 PetriNetUnfolderBase]: For 18873/18873 co-relation queries the response was YES. [2023-08-24 16:41:47,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12026 conditions, 1672 events. 875/1672 cut-off events. For 18873/18873 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 9679 event pairs, 161 based on Foata normal form. 96/1767 useless extension candidates. Maximal degree in co-relation 11962. Up to 742 conditions per place. [2023-08-24 16:41:47,509 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 150 selfloop transitions, 202 changer transitions 6/358 dead transitions. [2023-08-24 16:41:47,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 358 transitions, 5815 flow [2023-08-24 16:41:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 16:41:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 16:41:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2930 transitions. [2023-08-24 16:41:47,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023619884647075 [2023-08-24 16:41:47,513 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2930 transitions. [2023-08-24 16:41:47,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2930 transitions. [2023-08-24 16:41:47,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:47,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2930 transitions. [2023-08-24 16:41:47,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 133.1818181818182) internal successors, (2930), 22 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:47,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 331.0) internal successors, (7613), 23 states have internal predecessors, (7613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:47,524 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 331.0) internal successors, (7613), 23 states have internal predecessors, (7613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:47,524 INFO L175 Difference]: Start difference. First operand has 147 places, 234 transitions, 3343 flow. Second operand 22 states and 2930 transitions. [2023-08-24 16:41:47,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 358 transitions, 5815 flow [2023-08-24 16:41:47,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 358 transitions, 4890 flow, removed 404 selfloop flow, removed 8 redundant places. [2023-08-24 16:41:47,608 INFO L231 Difference]: Finished difference. Result has 161 places, 295 transitions, 4471 flow [2023-08-24 16:41:47,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=2626, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4471, PETRI_PLACES=161, PETRI_TRANSITIONS=295} [2023-08-24 16:41:47,609 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 140 predicate places. [2023-08-24 16:41:47,609 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 295 transitions, 4471 flow [2023-08-24 16:41:47,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 128.78947368421052) internal successors, (2447), 19 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:47,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:47,610 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:47,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 16:41:47,814 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,SelfDestructingSolverStorable20 [2023-08-24 16:41:47,815 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:47,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:47,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1854668922, now seen corresponding path program 11 times [2023-08-24 16:41:47,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:47,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043875101] [2023-08-24 16:41:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:47,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:48,038 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 16:41:48,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:48,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043875101] [2023-08-24 16:41:48,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043875101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:48,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121668518] [2023-08-24 16:41:48,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:41:48,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:48,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:48,040 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:48,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 16:41:48,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:41:48,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:41:48,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:41:48,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:48,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:48,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121668518] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:48,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:48,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-24 16:41:48,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836873261] [2023-08-24 16:41:48,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:48,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:41:48,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:48,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:41:48,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:41:48,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:41:48,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 295 transitions, 4471 flow. Second operand has 18 states, 18 states have (on average 128.88888888888889) internal successors, (2320), 18 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:48,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:48,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:41:48,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:49,847 INFO L124 PetriNetUnfolderBase]: 870/1742 cut-off events. [2023-08-24 16:41:49,848 INFO L125 PetriNetUnfolderBase]: For 16421/16421 co-relation queries the response was YES. [2023-08-24 16:41:49,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11921 conditions, 1742 events. 870/1742 cut-off events. For 16421/16421 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10641 event pairs, 84 based on Foata normal form. 24/1765 useless extension candidates. Maximal degree in co-relation 11585. Up to 738 conditions per place. [2023-08-24 16:41:49,880 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 168 selfloop transitions, 211 changer transitions 11/390 dead transitions. [2023-08-24 16:41:49,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 390 transitions, 5979 flow [2023-08-24 16:41:49,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 16:41:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 16:41:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3957 transitions. [2023-08-24 16:41:49,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984894259818731 [2023-08-24 16:41:49,887 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3957 transitions. [2023-08-24 16:41:49,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3957 transitions. [2023-08-24 16:41:49,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:49,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3957 transitions. [2023-08-24 16:41:49,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 131.9) internal successors, (3957), 30 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:49,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 331.0) internal successors, (10261), 31 states have internal predecessors, (10261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:49,903 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 331.0) internal successors, (10261), 31 states have internal predecessors, (10261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:49,904 INFO L175 Difference]: Start difference. First operand has 161 places, 295 transitions, 4471 flow. Second operand 30 states and 3957 transitions. [2023-08-24 16:41:49,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 390 transitions, 5979 flow [2023-08-24 16:41:50,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 390 transitions, 5405 flow, removed 245 selfloop flow, removed 4 redundant places. [2023-08-24 16:41:50,010 INFO L231 Difference]: Finished difference. Result has 189 places, 305 transitions, 4545 flow [2023-08-24 16:41:50,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4545, PETRI_PLACES=189, PETRI_TRANSITIONS=305} [2023-08-24 16:41:50,011 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 168 predicate places. [2023-08-24 16:41:50,011 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 305 transitions, 4545 flow [2023-08-24 16:41:50,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.88888888888889) internal successors, (2320), 18 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:50,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:50,012 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:50,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 16:41:50,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:50,217 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:50,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:50,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2125848162, now seen corresponding path program 12 times [2023-08-24 16:41:50,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:50,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789118912] [2023-08-24 16:41:50,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:50,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:50,429 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 16:41:50,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:50,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789118912] [2023-08-24 16:41:50,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789118912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:50,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259815601] [2023-08-24 16:41:50,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:41:50,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:50,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:50,433 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:50,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 16:41:50,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 16:41:50,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:41:50,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:41:50,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:50,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:50,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259815601] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:50,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:50,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-08-24 16:41:50,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436135691] [2023-08-24 16:41:50,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:50,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:41:50,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:50,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:41:50,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:41:50,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:41:50,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 305 transitions, 4545 flow. Second operand has 17 states, 17 states have (on average 128.94117647058823) internal successors, (2192), 17 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:50,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:50,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:41:50,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:52,968 INFO L124 PetriNetUnfolderBase]: 1029/2083 cut-off events. [2023-08-24 16:41:52,968 INFO L125 PetriNetUnfolderBase]: For 21005/21005 co-relation queries the response was YES. [2023-08-24 16:41:52,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14602 conditions, 2083 events. 1029/2083 cut-off events. For 21005/21005 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13410 event pairs, 113 based on Foata normal form. 44/2126 useless extension candidates. Maximal degree in co-relation 14252. Up to 903 conditions per place. [2023-08-24 16:41:52,998 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 250 selfloop transitions, 247 changer transitions 16/513 dead transitions. [2023-08-24 16:41:52,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 513 transitions, 7886 flow [2023-08-24 16:41:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 16:41:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 16:41:53,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 5812 transitions. [2023-08-24 16:41:53,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990661906069761 [2023-08-24 16:41:53,005 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 5812 transitions. [2023-08-24 16:41:53,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 5812 transitions. [2023-08-24 16:41:53,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:53,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 5812 transitions. [2023-08-24 16:41:53,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 132.0909090909091) internal successors, (5812), 44 states have internal predecessors, (5812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:53,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 331.0) internal successors, (14895), 45 states have internal predecessors, (14895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:53,026 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 331.0) internal successors, (14895), 45 states have internal predecessors, (14895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:53,027 INFO L175 Difference]: Start difference. First operand has 189 places, 305 transitions, 4545 flow. Second operand 44 states and 5812 transitions. [2023-08-24 16:41:53,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 513 transitions, 7886 flow [2023-08-24 16:41:53,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 513 transitions, 7295 flow, removed 99 selfloop flow, removed 18 redundant places. [2023-08-24 16:41:53,136 INFO L231 Difference]: Finished difference. Result has 225 places, 378 transitions, 6028 flow [2023-08-24 16:41:53,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=4003, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=6028, PETRI_PLACES=225, PETRI_TRANSITIONS=378} [2023-08-24 16:41:53,137 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 204 predicate places. [2023-08-24 16:41:53,137 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 378 transitions, 6028 flow [2023-08-24 16:41:53,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 128.94117647058823) internal successors, (2192), 17 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:53,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:53,138 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:53,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 16:41:53,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:53,343 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:53,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:53,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2070556190, now seen corresponding path program 13 times [2023-08-24 16:41:53,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:53,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954488295] [2023-08-24 16:41:53,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:53,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:53,564 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 16:41:53,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:53,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954488295] [2023-08-24 16:41:53,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954488295] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:53,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407715252] [2023-08-24 16:41:53,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:41:53,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:53,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:53,566 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:53,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 16:41:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:53,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:41:53,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:53,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:53,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:53,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407715252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:53,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:53,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-24 16:41:53,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029967556] [2023-08-24 16:41:53,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:53,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:41:53,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:53,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:41:53,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:41:53,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:41:53,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 378 transitions, 6028 flow. Second operand has 18 states, 18 states have (on average 128.72222222222223) internal successors, (2317), 18 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:53,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:53,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:41:53,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:55,572 INFO L124 PetriNetUnfolderBase]: 997/2006 cut-off events. [2023-08-24 16:41:55,572 INFO L125 PetriNetUnfolderBase]: For 20349/20349 co-relation queries the response was YES. [2023-08-24 16:41:55,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14776 conditions, 2006 events. 997/2006 cut-off events. For 20349/20349 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12595 event pairs, 207 based on Foata normal form. 12/2017 useless extension candidates. Maximal degree in co-relation 14481. Up to 997 conditions per place. [2023-08-24 16:41:55,596 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 226 selfloop transitions, 222 changer transitions 0/448 dead transitions. [2023-08-24 16:41:55,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 448 transitions, 7491 flow [2023-08-24 16:41:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 16:41:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 16:41:55,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3446 transitions. [2023-08-24 16:41:55,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40041831280501977 [2023-08-24 16:41:55,600 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3446 transitions. [2023-08-24 16:41:55,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3446 transitions. [2023-08-24 16:41:55,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:55,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3446 transitions. [2023-08-24 16:41:55,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 132.53846153846155) internal successors, (3446), 26 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:55,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 331.0) internal successors, (8937), 27 states have internal predecessors, (8937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:55,613 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 331.0) internal successors, (8937), 27 states have internal predecessors, (8937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:55,613 INFO L175 Difference]: Start difference. First operand has 225 places, 378 transitions, 6028 flow. Second operand 26 states and 3446 transitions. [2023-08-24 16:41:55,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 448 transitions, 7491 flow [2023-08-24 16:41:55,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 448 transitions, 6762 flow, removed 250 selfloop flow, removed 11 redundant places. [2023-08-24 16:41:55,769 INFO L231 Difference]: Finished difference. Result has 241 places, 383 transitions, 6005 flow [2023-08-24 16:41:55,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=5231, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6005, PETRI_PLACES=241, PETRI_TRANSITIONS=383} [2023-08-24 16:41:55,771 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 220 predicate places. [2023-08-24 16:41:55,771 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 383 transitions, 6005 flow [2023-08-24 16:41:55,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.72222222222223) internal successors, (2317), 18 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:55,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:55,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:55,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 16:41:55,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-24 16:41:55,977 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:55,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:55,977 INFO L85 PathProgramCache]: Analyzing trace with hash -504526194, now seen corresponding path program 14 times [2023-08-24 16:41:55,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:55,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852930884] [2023-08-24 16:41:55,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:55,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:56,159 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 16:41:56,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:56,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852930884] [2023-08-24 16:41:56,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852930884] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:56,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448709118] [2023-08-24 16:41:56,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:41:56,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:56,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:56,161 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:56,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 16:41:56,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:41:56,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:41:56,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:41:56,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:56,333 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 16:41:56,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:56,436 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 16:41:56,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448709118] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:56,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:56,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-24 16:41:56,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489333995] [2023-08-24 16:41:56,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:56,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:41:56,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:56,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:41:56,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:41:56,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:41:56,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 383 transitions, 6005 flow. Second operand has 17 states, 17 states have (on average 128.88235294117646) internal successors, (2191), 17 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:56,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:56,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:41:56,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:41:58,228 INFO L124 PetriNetUnfolderBase]: 1081/2164 cut-off events. [2023-08-24 16:41:58,228 INFO L125 PetriNetUnfolderBase]: For 21272/21272 co-relation queries the response was YES. [2023-08-24 16:41:58,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16144 conditions, 2164 events. 1081/2164 cut-off events. For 21272/21272 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13880 event pairs, 155 based on Foata normal form. 18/2181 useless extension candidates. Maximal degree in co-relation 15794. Up to 962 conditions per place. [2023-08-24 16:41:58,251 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 231 selfloop transitions, 284 changer transitions 0/515 dead transitions. [2023-08-24 16:41:58,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 515 transitions, 8634 flow [2023-08-24 16:41:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 16:41:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 16:41:58,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4734 transitions. [2023-08-24 16:41:58,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972809667673716 [2023-08-24 16:41:58,261 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4734 transitions. [2023-08-24 16:41:58,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4734 transitions. [2023-08-24 16:41:58,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:41:58,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4734 transitions. [2023-08-24 16:41:58,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 131.5) internal successors, (4734), 36 states have internal predecessors, (4734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:58,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 331.0) internal successors, (12247), 37 states have internal predecessors, (12247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:58,277 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 331.0) internal successors, (12247), 37 states have internal predecessors, (12247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:58,277 INFO L175 Difference]: Start difference. First operand has 241 places, 383 transitions, 6005 flow. Second operand 36 states and 4734 transitions. [2023-08-24 16:41:58,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 515 transitions, 8634 flow [2023-08-24 16:41:58,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 515 transitions, 8310 flow, removed 46 selfloop flow, removed 19 redundant places. [2023-08-24 16:41:58,446 INFO L231 Difference]: Finished difference. Result has 267 places, 439 transitions, 7516 flow [2023-08-24 16:41:58,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=5718, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7516, PETRI_PLACES=267, PETRI_TRANSITIONS=439} [2023-08-24 16:41:58,447 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 246 predicate places. [2023-08-24 16:41:58,447 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 439 transitions, 7516 flow [2023-08-24 16:41:58,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 128.88235294117646) internal successors, (2191), 17 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:58,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:41:58,448 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:41:58,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 16:41:58,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:58,653 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:41:58,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:41:58,653 INFO L85 PathProgramCache]: Analyzing trace with hash -967826182, now seen corresponding path program 15 times [2023-08-24 16:41:58,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:41:58,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531770367] [2023-08-24 16:41:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:41:58,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:41:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:41:58,866 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 16:41:58,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:41:58,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531770367] [2023-08-24 16:41:58,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531770367] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:41:58,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987537954] [2023-08-24 16:41:58,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:41:58,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:41:58,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:41:58,869 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:41:58,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 16:41:59,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 16:41:59,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:41:59,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:41:59,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:41:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:59,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:41:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:41:59,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987537954] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:41:59,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:41:59,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-08-24 16:41:59,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225611912] [2023-08-24 16:41:59,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:41:59,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:41:59,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:41:59,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:41:59,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:41:59,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:41:59,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 439 transitions, 7516 flow. Second operand has 17 states, 17 states have (on average 128.94117647058823) internal successors, (2192), 17 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:41:59,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:41:59,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:41:59,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:42:02,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:42:04,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:42:05,885 INFO L124 PetriNetUnfolderBase]: 1553/3228 cut-off events. [2023-08-24 16:42:05,886 INFO L125 PetriNetUnfolderBase]: For 38820/38820 co-relation queries the response was YES. [2023-08-24 16:42:05,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25877 conditions, 3228 events. 1553/3228 cut-off events. For 38820/38820 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 23618 event pairs, 164 based on Foata normal form. 78/3305 useless extension candidates. Maximal degree in co-relation 25519. Up to 1400 conditions per place. [2023-08-24 16:42:05,922 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 387 selfloop transitions, 409 changer transitions 22/818 dead transitions. [2023-08-24 16:42:05,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 818 transitions, 15006 flow [2023-08-24 16:42:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-24 16:42:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-24 16:42:05,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 6852 transitions. [2023-08-24 16:42:05,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39809435277713223 [2023-08-24 16:42:05,983 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 6852 transitions. [2023-08-24 16:42:05,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 6852 transitions. [2023-08-24 16:42:05,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:42:05,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 6852 transitions. [2023-08-24 16:42:05,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 131.76923076923077) internal successors, (6852), 52 states have internal predecessors, (6852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:06,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 331.0) internal successors, (17543), 53 states have internal predecessors, (17543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:06,007 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 331.0) internal successors, (17543), 53 states have internal predecessors, (17543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:06,008 INFO L175 Difference]: Start difference. First operand has 267 places, 439 transitions, 7516 flow. Second operand 52 states and 6852 transitions. [2023-08-24 16:42:06,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 818 transitions, 15006 flow [2023-08-24 16:42:06,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 818 transitions, 14483 flow, removed 170 selfloop flow, removed 11 redundant places. [2023-08-24 16:42:06,321 INFO L231 Difference]: Finished difference. Result has 326 places, 637 transitions, 12371 flow [2023-08-24 16:42:06,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=7192, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=12371, PETRI_PLACES=326, PETRI_TRANSITIONS=637} [2023-08-24 16:42:06,322 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 305 predicate places. [2023-08-24 16:42:06,322 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 637 transitions, 12371 flow [2023-08-24 16:42:06,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 128.94117647058823) internal successors, (2192), 17 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:06,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:42:06,322 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:42:06,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 16:42:06,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:42:06,523 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:42:06,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:42:06,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1066389126, now seen corresponding path program 16 times [2023-08-24 16:42:06,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:42:06,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110489010] [2023-08-24 16:42:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:42:06,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:42:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:42:06,760 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 16:42:06,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:42:06,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110489010] [2023-08-24 16:42:06,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110489010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:42:06,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757888813] [2023-08-24 16:42:06,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:42:06,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:42:06,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:42:06,762 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:42:06,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 16:42:06,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:42:06,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:42:06,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:42:06,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:42:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:42:06,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:42:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:42:07,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757888813] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:42:07,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:42:07,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-24 16:42:07,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928096602] [2023-08-24 16:42:07,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:42:07,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:42:07,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:42:07,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:42:07,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:42:07,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:42:07,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 637 transitions, 12371 flow. Second operand has 18 states, 18 states have (on average 128.72222222222223) internal successors, (2317), 18 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:07,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:42:07,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:42:07,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:42:10,789 INFO L124 PetriNetUnfolderBase]: 1677/3557 cut-off events. [2023-08-24 16:42:10,789 INFO L125 PetriNetUnfolderBase]: For 54669/54669 co-relation queries the response was YES. [2023-08-24 16:42:10,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31179 conditions, 3557 events. 1677/3557 cut-off events. For 54669/54669 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26823 event pairs, 289 based on Foata normal form. 40/3596 useless extension candidates. Maximal degree in co-relation 30796. Up to 1506 conditions per place. [2023-08-24 16:42:10,828 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 413 selfloop transitions, 403 changer transitions 0/816 dead transitions. [2023-08-24 16:42:10,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 816 transitions, 17102 flow [2023-08-24 16:42:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 16:42:10,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 16:42:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4099 transitions. [2023-08-24 16:42:10,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39947373550336224 [2023-08-24 16:42:10,833 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4099 transitions. [2023-08-24 16:42:10,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4099 transitions. [2023-08-24 16:42:10,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:42:10,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4099 transitions. [2023-08-24 16:42:10,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 132.2258064516129) internal successors, (4099), 31 states have internal predecessors, (4099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:10,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 331.0) internal successors, (10592), 32 states have internal predecessors, (10592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:10,847 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 331.0) internal successors, (10592), 32 states have internal predecessors, (10592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:10,847 INFO L175 Difference]: Start difference. First operand has 326 places, 637 transitions, 12371 flow. Second operand 31 states and 4099 transitions. [2023-08-24 16:42:10,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 816 transitions, 17102 flow [2023-08-24 16:42:11,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 816 transitions, 15850 flow, removed 525 selfloop flow, removed 12 redundant places. [2023-08-24 16:42:11,376 INFO L231 Difference]: Finished difference. Result has 349 places, 713 transitions, 14440 flow [2023-08-24 16:42:11,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=11316, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=14440, PETRI_PLACES=349, PETRI_TRANSITIONS=713} [2023-08-24 16:42:11,377 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 328 predicate places. [2023-08-24 16:42:11,377 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 713 transitions, 14440 flow [2023-08-24 16:42:11,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.72222222222223) internal successors, (2317), 18 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:11,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:42:11,377 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:42:11,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-24 16:42:11,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:42:11,582 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:42:11,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:42:11,582 INFO L85 PathProgramCache]: Analyzing trace with hash -198837638, now seen corresponding path program 17 times [2023-08-24 16:42:11,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:42:11,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87145585] [2023-08-24 16:42:11,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:42:11,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:42:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:42:11,813 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 16:42:11,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:42:11,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87145585] [2023-08-24 16:42:11,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87145585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:42:11,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768380955] [2023-08-24 16:42:11,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:42:11,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:42:11,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:42:11,815 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:42:11,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 16:42:11,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:42:11,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:42:11,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:42:11,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:42:11,981 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 16:42:11,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:42:12,079 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 16:42:12,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768380955] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:42:12,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:42:12,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 16:42:12,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998739939] [2023-08-24 16:42:12,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:42:12,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:42:12,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:42:12,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:42:12,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:42:12,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:42:12,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 713 transitions, 14440 flow. Second operand has 18 states, 18 states have (on average 128.83333333333334) internal successors, (2319), 18 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:12,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:42:12,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:42:12,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:42:16,363 INFO L124 PetriNetUnfolderBase]: 1948/4094 cut-off events. [2023-08-24 16:42:16,363 INFO L125 PetriNetUnfolderBase]: For 73959/73959 co-relation queries the response was YES. [2023-08-24 16:42:16,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37604 conditions, 4094 events. 1948/4094 cut-off events. For 73959/73959 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31612 event pairs, 298 based on Foata normal form. 70/4163 useless extension candidates. Maximal degree in co-relation 37211. Up to 1848 conditions per place. [2023-08-24 16:42:16,410 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 390 selfloop transitions, 594 changer transitions 0/984 dead transitions. [2023-08-24 16:42:16,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 984 transitions, 21397 flow [2023-08-24 16:42:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-24 16:42:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-24 16:42:16,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 7085 transitions. [2023-08-24 16:42:16,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3963858117936668 [2023-08-24 16:42:16,419 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 7085 transitions. [2023-08-24 16:42:16,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 7085 transitions. [2023-08-24 16:42:16,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:42:16,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 7085 transitions. [2023-08-24 16:42:16,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 131.2037037037037) internal successors, (7085), 54 states have internal predecessors, (7085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:16,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 331.0) internal successors, (18205), 55 states have internal predecessors, (18205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:16,442 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 331.0) internal successors, (18205), 55 states have internal predecessors, (18205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:16,443 INFO L175 Difference]: Start difference. First operand has 349 places, 713 transitions, 14440 flow. Second operand 54 states and 7085 transitions. [2023-08-24 16:42:16,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 984 transitions, 21397 flow [2023-08-24 16:42:17,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 984 transitions, 20718 flow, removed 277 selfloop flow, removed 14 redundant places. [2023-08-24 16:42:17,245 INFO L231 Difference]: Finished difference. Result has 403 places, 869 transitions, 19359 flow [2023-08-24 16:42:17,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=13912, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=19359, PETRI_PLACES=403, PETRI_TRANSITIONS=869} [2023-08-24 16:42:17,246 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 382 predicate places. [2023-08-24 16:42:17,246 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 869 transitions, 19359 flow [2023-08-24 16:42:17,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.83333333333334) internal successors, (2319), 18 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:17,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:42:17,247 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:42:17,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 16:42:17,447 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,SelfDestructingSolverStorable27 [2023-08-24 16:42:17,448 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:42:17,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:42:17,448 INFO L85 PathProgramCache]: Analyzing trace with hash -160965474, now seen corresponding path program 18 times [2023-08-24 16:42:17,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:42:17,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154510907] [2023-08-24 16:42:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:42:17,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:42:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:42:17,648 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 16:42:17,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:42:17,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154510907] [2023-08-24 16:42:17,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154510907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:42:17,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129058866] [2023-08-24 16:42:17,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:42:17,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:42:17,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:42:17,653 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:42:17,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 16:42:17,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 16:42:17,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:42:17,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:42:17,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:42:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:42:17,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:42:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:42:17,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129058866] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:42:17,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:42:17,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-08-24 16:42:17,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976324255] [2023-08-24 16:42:17,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:42:17,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:42:17,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:42:17,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:42:17,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:42:17,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:42:17,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 869 transitions, 19359 flow. Second operand has 17 states, 17 states have (on average 128.94117647058823) internal successors, (2192), 17 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:17,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:42:17,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:42:17,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:42:22,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:42:26,815 INFO L124 PetriNetUnfolderBase]: 3241/6965 cut-off events. [2023-08-24 16:42:26,815 INFO L125 PetriNetUnfolderBase]: For 153799/153799 co-relation queries the response was YES. [2023-08-24 16:42:26,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68951 conditions, 6965 events. 3241/6965 cut-off events. For 153799/153799 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 60589 event pairs, 54 based on Foata normal form. 70/7034 useless extension candidates. Maximal degree in co-relation 68162. Up to 3022 conditions per place. [2023-08-24 16:42:26,896 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 721 selfloop transitions, 929 changer transitions 43/1693 dead transitions. [2023-08-24 16:42:26,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 1693 transitions, 40425 flow [2023-08-24 16:42:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-24 16:42:26,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-24 16:42:26,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6490 transitions. [2023-08-24 16:42:26,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4001479745976941 [2023-08-24 16:42:26,902 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6490 transitions. [2023-08-24 16:42:26,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6490 transitions. [2023-08-24 16:42:26,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:42:26,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6490 transitions. [2023-08-24 16:42:26,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 132.44897959183675) internal successors, (6490), 49 states have internal predecessors, (6490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:26,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 331.0) internal successors, (16550), 50 states have internal predecessors, (16550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:26,922 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 331.0) internal successors, (16550), 50 states have internal predecessors, (16550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:26,922 INFO L175 Difference]: Start difference. First operand has 403 places, 869 transitions, 19359 flow. Second operand 49 states and 6490 transitions. [2023-08-24 16:42:26,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 1693 transitions, 40425 flow [2023-08-24 16:42:28,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 1693 transitions, 39032 flow, removed 475 selfloop flow, removed 21 redundant places. [2023-08-24 16:42:29,005 INFO L231 Difference]: Finished difference. Result has 453 places, 1376 transitions, 33729 flow [2023-08-24 16:42:29,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=18378, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=33729, PETRI_PLACES=453, PETRI_TRANSITIONS=1376} [2023-08-24 16:42:29,006 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 432 predicate places. [2023-08-24 16:42:29,006 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 1376 transitions, 33729 flow [2023-08-24 16:42:29,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 128.94117647058823) internal successors, (2192), 17 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:29,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:42:29,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:42:29,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-24 16:42:29,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 16:42:29,209 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:42:29,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:42:29,209 INFO L85 PathProgramCache]: Analyzing trace with hash 608023070, now seen corresponding path program 19 times [2023-08-24 16:42:29,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:42:29,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538965232] [2023-08-24 16:42:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:42:29,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:42:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:42:29,421 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 16:42:29,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:42:29,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538965232] [2023-08-24 16:42:29,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538965232] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:42:29,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427778009] [2023-08-24 16:42:29,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:42:29,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:42:29,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:42:29,425 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:42:29,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 16:42:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:42:29,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:42:29,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:42:29,619 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 16:42:29,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:42:29,720 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 16:42:29,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427778009] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:42:29,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:42:29,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-24 16:42:29,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180156507] [2023-08-24 16:42:29,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:42:29,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 16:42:29,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:42:29,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 16:42:29,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-08-24 16:42:29,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:42:29,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 1376 transitions, 33729 flow. Second operand has 19 states, 19 states have (on average 128.78947368421052) internal successors, (2447), 19 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:29,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:42:29,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:42:29,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:42:36,832 INFO L124 PetriNetUnfolderBase]: 3552/7550 cut-off events. [2023-08-24 16:42:36,833 INFO L125 PetriNetUnfolderBase]: For 184637/184637 co-relation queries the response was YES. [2023-08-24 16:42:36,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81573 conditions, 7550 events. 3552/7550 cut-off events. For 184637/184637 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 66236 event pairs, 13 based on Foata normal form. 56/7605 useless extension candidates. Maximal degree in co-relation 80672. Up to 3207 conditions per place. [2023-08-24 16:42:36,938 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 742 selfloop transitions, 1115 changer transitions 7/1864 dead transitions. [2023-08-24 16:42:36,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 1864 transitions, 48433 flow [2023-08-24 16:42:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-24 16:42:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-24 16:42:36,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 7388 transitions. [2023-08-24 16:42:36,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39857574449719463 [2023-08-24 16:42:36,943 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 7388 transitions. [2023-08-24 16:42:36,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 7388 transitions. [2023-08-24 16:42:36,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:42:36,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 7388 transitions. [2023-08-24 16:42:36,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 131.92857142857142) internal successors, (7388), 56 states have internal predecessors, (7388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:36,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 331.0) internal successors, (18867), 57 states have internal predecessors, (18867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:36,964 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 331.0) internal successors, (18867), 57 states have internal predecessors, (18867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:36,965 INFO L175 Difference]: Start difference. First operand has 453 places, 1376 transitions, 33729 flow. Second operand 56 states and 7388 transitions. [2023-08-24 16:42:36,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 1864 transitions, 48433 flow [2023-08-24 16:42:40,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1864 transitions, 46904 flow, removed 701 selfloop flow, removed 7 redundant places. [2023-08-24 16:42:40,229 INFO L231 Difference]: Finished difference. Result has 514 places, 1642 transitions, 42909 flow [2023-08-24 16:42:40,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=32334, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=862, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=42909, PETRI_PLACES=514, PETRI_TRANSITIONS=1642} [2023-08-24 16:42:40,230 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 493 predicate places. [2023-08-24 16:42:40,230 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 1642 transitions, 42909 flow [2023-08-24 16:42:40,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 128.78947368421052) internal successors, (2447), 19 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:40,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:42:40,231 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:42:40,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 16:42:40,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:42:40,432 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:42:40,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:42:40,432 INFO L85 PathProgramCache]: Analyzing trace with hash -231822788, now seen corresponding path program 20 times [2023-08-24 16:42:40,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:42:40,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328938156] [2023-08-24 16:42:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:42:40,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:42:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:42:40,714 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 16:42:40,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:42:40,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328938156] [2023-08-24 16:42:40,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328938156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:42:40,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544613249] [2023-08-24 16:42:40,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:42:40,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:42:40,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:42:40,717 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:42:40,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 16:42:40,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:42:40,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:42:40,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:42:40,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:42:40,868 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 16:42:40,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:42:40,976 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 16:42:40,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544613249] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:42:40,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:42:40,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-24 16:42:40,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717905204] [2023-08-24 16:42:40,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:42:40,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:42:40,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:42:40,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:42:40,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:42:40,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:42:40,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 1642 transitions, 42909 flow. Second operand has 18 states, 18 states have (on average 128.77777777777777) internal successors, (2318), 18 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:40,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:42:40,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:42:40,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:42:46,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:42:52,010 INFO L124 PetriNetUnfolderBase]: 3910/8471 cut-off events. [2023-08-24 16:42:52,010 INFO L125 PetriNetUnfolderBase]: For 263117/263117 co-relation queries the response was YES. [2023-08-24 16:42:52,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96771 conditions, 8471 events. 3910/8471 cut-off events. For 263117/263117 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 76881 event pairs, 101 based on Foata normal form. 40/8510 useless extension candidates. Maximal degree in co-relation 95806. Up to 3583 conditions per place. [2023-08-24 16:42:52,138 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 1089 selfloop transitions, 894 changer transitions 11/1994 dead transitions. [2023-08-24 16:42:52,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 1994 transitions, 55179 flow [2023-08-24 16:42:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 16:42:52,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 16:42:52,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4658 transitions. [2023-08-24 16:42:52,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40207164436771686 [2023-08-24 16:42:52,141 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4658 transitions. [2023-08-24 16:42:52,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4658 transitions. [2023-08-24 16:42:52,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:42:52,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4658 transitions. [2023-08-24 16:42:52,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 133.0857142857143) internal successors, (4658), 35 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:52,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 331.0) internal successors, (11916), 36 states have internal predecessors, (11916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:52,152 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 331.0) internal successors, (11916), 36 states have internal predecessors, (11916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:52,153 INFO L175 Difference]: Start difference. First operand has 514 places, 1642 transitions, 42909 flow. Second operand 35 states and 4658 transitions. [2023-08-24 16:42:52,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 1994 transitions, 55179 flow [2023-08-24 16:42:56,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1994 transitions, 53880 flow, removed 499 selfloop flow, removed 13 redundant places. [2023-08-24 16:42:56,975 INFO L231 Difference]: Finished difference. Result has 546 places, 1788 transitions, 49471 flow [2023-08-24 16:42:56,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=41748, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=762, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=850, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=49471, PETRI_PLACES=546, PETRI_TRANSITIONS=1788} [2023-08-24 16:42:56,977 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 525 predicate places. [2023-08-24 16:42:56,977 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 1788 transitions, 49471 flow [2023-08-24 16:42:56,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.77777777777777) internal successors, (2318), 18 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:56,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:42:56,977 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:42:56,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 16:42:57,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:42:57,182 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:42:57,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:42:57,182 INFO L85 PathProgramCache]: Analyzing trace with hash -761387049, now seen corresponding path program 21 times [2023-08-24 16:42:57,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:42:57,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898737316] [2023-08-24 16:42:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:42:57,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:42:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:42:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:42:57,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:42:57,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898737316] [2023-08-24 16:42:57,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898737316] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:42:57,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545471695] [2023-08-24 16:42:57,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:42:57,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:42:57,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:42:57,409 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:42:57,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 16:42:57,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 16:42:57,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:42:57,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:42:57,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:42:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:42:57,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:42:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:42:57,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545471695] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:42:57,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:42:57,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 16:42:57,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364394830] [2023-08-24 16:42:57,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:42:57,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:42:57,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:42:57,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:42:57,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:42:57,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:42:57,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 1788 transitions, 49471 flow. Second operand has 18 states, 18 states have (on average 129.22222222222223) internal successors, (2326), 18 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:42:57,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:42:57,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:42:57,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:43:05,012 INFO L124 PetriNetUnfolderBase]: 4127/8924 cut-off events. [2023-08-24 16:43:05,012 INFO L125 PetriNetUnfolderBase]: For 325213/325213 co-relation queries the response was YES. [2023-08-24 16:43:05,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105360 conditions, 8924 events. 4127/8924 cut-off events. For 325213/325213 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 81907 event pairs, 60 based on Foata normal form. 65/8988 useless extension candidates. Maximal degree in co-relation 104304. Up to 3747 conditions per place. [2023-08-24 16:43:05,139 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 1072 selfloop transitions, 906 changer transitions 5/1983 dead transitions. [2023-08-24 16:43:05,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 1983 transitions, 56911 flow [2023-08-24 16:43:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 16:43:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 16:43:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4760 transitions. [2023-08-24 16:43:05,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994629070157771 [2023-08-24 16:43:05,144 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4760 transitions. [2023-08-24 16:43:05,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4760 transitions. [2023-08-24 16:43:05,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:43:05,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4760 transitions. [2023-08-24 16:43:05,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 132.22222222222223) internal successors, (4760), 36 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:05,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 331.0) internal successors, (12247), 37 states have internal predecessors, (12247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:05,153 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 331.0) internal successors, (12247), 37 states have internal predecessors, (12247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:05,153 INFO L175 Difference]: Start difference. First operand has 546 places, 1788 transitions, 49471 flow. Second operand 36 states and 4760 transitions. [2023-08-24 16:43:05,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 1983 transitions, 56911 flow [2023-08-24 16:43:10,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 1983 transitions, 55776 flow, removed 413 selfloop flow, removed 15 redundant places. [2023-08-24 16:43:10,486 INFO L231 Difference]: Finished difference. Result has 578 places, 1887 transitions, 52855 flow [2023-08-24 16:43:10,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=48350, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=816, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=944, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=52855, PETRI_PLACES=578, PETRI_TRANSITIONS=1887} [2023-08-24 16:43:10,488 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 557 predicate places. [2023-08-24 16:43:10,488 INFO L495 AbstractCegarLoop]: Abstraction has has 578 places, 1887 transitions, 52855 flow [2023-08-24 16:43:10,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 129.22222222222223) internal successors, (2326), 18 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:10,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:43:10,489 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:43:10,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 16:43:10,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:43:10,694 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:43:10,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:43:10,694 INFO L85 PathProgramCache]: Analyzing trace with hash 194829405, now seen corresponding path program 22 times [2023-08-24 16:43:10,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:43:10,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241121020] [2023-08-24 16:43:10,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:43:10,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:43:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:43:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:43:10,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:43:10,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241121020] [2023-08-24 16:43:10,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241121020] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:43:10,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438424604] [2023-08-24 16:43:10,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:43:10,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:43:10,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:43:10,862 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:43:10,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 16:43:10,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:43:10,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:43:10,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:43:10,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:43:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:43:11,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:43:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:43:11,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438424604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:43:11,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:43:11,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-24 16:43:11,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422680576] [2023-08-24 16:43:11,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:43:11,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:43:11,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:43:11,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:43:11,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:43:11,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:43:11,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 1887 transitions, 52855 flow. Second operand has 17 states, 17 states have (on average 129.11764705882354) internal successors, (2195), 17 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:11,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:43:11,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:43:11,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:43:17,232 INFO L124 PetriNetUnfolderBase]: 4147/8963 cut-off events. [2023-08-24 16:43:17,232 INFO L125 PetriNetUnfolderBase]: For 338037/338037 co-relation queries the response was YES. [2023-08-24 16:43:17,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107376 conditions, 8963 events. 4147/8963 cut-off events. For 338037/338037 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 82197 event pairs, 141 based on Foata normal form. 12/8974 useless extension candidates. Maximal degree in co-relation 106617. Up to 5431 conditions per place. [2023-08-24 16:43:17,360 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 1152 selfloop transitions, 780 changer transitions 1/1933 dead transitions. [2023-08-24 16:43:17,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 1933 transitions, 57426 flow [2023-08-24 16:43:17,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 16:43:17,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 16:43:17,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1998 transitions. [2023-08-24 16:43:17,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.402416918429003 [2023-08-24 16:43:17,362 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1998 transitions. [2023-08-24 16:43:17,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1998 transitions. [2023-08-24 16:43:17,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:43:17,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1998 transitions. [2023-08-24 16:43:17,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 133.2) internal successors, (1998), 15 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:17,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 331.0) internal successors, (5296), 16 states have internal predecessors, (5296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:17,366 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 331.0) internal successors, (5296), 16 states have internal predecessors, (5296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:17,366 INFO L175 Difference]: Start difference. First operand has 578 places, 1887 transitions, 52855 flow. Second operand 15 states and 1998 transitions. [2023-08-24 16:43:17,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 1933 transitions, 57426 flow [2023-08-24 16:43:22,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 581 places, 1933 transitions, 55834 flow, removed 401 selfloop flow, removed 11 redundant places. [2023-08-24 16:43:22,692 INFO L231 Difference]: Finished difference. Result has 584 places, 1895 transitions, 53150 flow [2023-08-24 16:43:22,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=51391, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=774, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=53150, PETRI_PLACES=584, PETRI_TRANSITIONS=1895} [2023-08-24 16:43:22,694 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 563 predicate places. [2023-08-24 16:43:22,695 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 1895 transitions, 53150 flow [2023-08-24 16:43:22,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 129.11764705882354) internal successors, (2195), 17 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:22,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:43:22,695 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:43:22,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-24 16:43:22,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-24 16:43:22,900 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:43:22,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:43:22,900 INFO L85 PathProgramCache]: Analyzing trace with hash -564812185, now seen corresponding path program 23 times [2023-08-24 16:43:22,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:43:22,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501406367] [2023-08-24 16:43:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:43:22,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:43:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:43:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:43:23,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:43:23,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501406367] [2023-08-24 16:43:23,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501406367] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:43:23,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771994512] [2023-08-24 16:43:23,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:43:23,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:43:23,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:43:23,063 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:43:23,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 16:43:23,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 16:43:23,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:43:23,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:43:23,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:43:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:43:23,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:43:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:43:23,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771994512] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:43:23,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:43:23,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2023-08-24 16:43:23,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744039305] [2023-08-24 16:43:23,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:43:23,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 16:43:23,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:43:23,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 16:43:23,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-08-24 16:43:23,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:43:23,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 1895 transitions, 53150 flow. Second operand has 19 states, 19 states have (on average 128.78947368421052) internal successors, (2447), 19 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:23,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:43:23,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:43:23,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:43:29,371 INFO L124 PetriNetUnfolderBase]: 4236/9134 cut-off events. [2023-08-24 16:43:29,372 INFO L125 PetriNetUnfolderBase]: For 339328/339328 co-relation queries the response was YES. [2023-08-24 16:43:29,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108352 conditions, 9134 events. 4236/9134 cut-off events. For 339328/339328 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 84042 event pairs, 68 based on Foata normal form. 22/9155 useless extension candidates. Maximal degree in co-relation 107853. Up to 5483 conditions per place. [2023-08-24 16:43:29,521 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 1663 selfloop transitions, 326 changer transitions 1/1990 dead transitions. [2023-08-24 16:43:29,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 1990 transitions, 58729 flow [2023-08-24 16:43:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 16:43:29,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 16:43:29,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2660 transitions. [2023-08-24 16:43:29,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40181268882175225 [2023-08-24 16:43:29,524 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2660 transitions. [2023-08-24 16:43:29,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2660 transitions. [2023-08-24 16:43:29,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:43:29,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2660 transitions. [2023-08-24 16:43:29,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 133.0) internal successors, (2660), 20 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:29,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 331.0) internal successors, (6951), 21 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:29,529 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 331.0) internal successors, (6951), 21 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:29,529 INFO L175 Difference]: Start difference. First operand has 584 places, 1895 transitions, 53150 flow. Second operand 20 states and 2660 transitions. [2023-08-24 16:43:29,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 1990 transitions, 58729 flow [2023-08-24 16:43:35,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 1990 transitions, 56859 flow, removed 43 selfloop flow, removed 11 redundant places. [2023-08-24 16:43:35,789 INFO L231 Difference]: Finished difference. Result has 601 places, 1927 transitions, 53127 flow [2023-08-24 16:43:35,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=51322, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=53127, PETRI_PLACES=601, PETRI_TRANSITIONS=1927} [2023-08-24 16:43:35,791 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 580 predicate places. [2023-08-24 16:43:35,791 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 1927 transitions, 53127 flow [2023-08-24 16:43:35,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 128.78947368421052) internal successors, (2447), 19 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:35,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:43:35,791 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:43:35,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 16:43:35,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-24 16:43:35,991 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:43:35,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:43:35,992 INFO L85 PathProgramCache]: Analyzing trace with hash -532463433, now seen corresponding path program 24 times [2023-08-24 16:43:35,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:43:35,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189014143] [2023-08-24 16:43:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:43:35,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:43:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:43:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:43:36,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:43:36,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189014143] [2023-08-24 16:43:36,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189014143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:43:36,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988735805] [2023-08-24 16:43:36,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:43:36,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:43:36,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:43:36,144 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:43:36,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 16:43:36,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 16:43:36,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:43:36,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:43:36,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:43:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:43:36,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:43:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:43:36,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988735805] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:43:36,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:43:36,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-24 16:43:36,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191407508] [2023-08-24 16:43:36,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:43:36,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:43:36,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:43:36,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:43:36,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:43:36,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:43:36,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 1927 transitions, 53127 flow. Second operand has 17 states, 17 states have (on average 129.2941176470588) internal successors, (2198), 17 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:36,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:43:36,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:43:36,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:43:44,682 INFO L124 PetriNetUnfolderBase]: 4504/9746 cut-off events. [2023-08-24 16:43:44,683 INFO L125 PetriNetUnfolderBase]: For 402743/402743 co-relation queries the response was YES. [2023-08-24 16:43:44,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117461 conditions, 9746 events. 4504/9746 cut-off events. For 402743/402743 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 90680 event pairs, 113 based on Foata normal form. 60/9805 useless extension candidates. Maximal degree in co-relation 116630. Up to 4229 conditions per place. [2023-08-24 16:43:44,835 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 1335 selfloop transitions, 772 changer transitions 9/2116 dead transitions. [2023-08-24 16:43:44,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 2116 transitions, 61701 flow [2023-08-24 16:43:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 16:43:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 16:43:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3724 transitions. [2023-08-24 16:43:44,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40181268882175225 [2023-08-24 16:43:44,839 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3724 transitions. [2023-08-24 16:43:44,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3724 transitions. [2023-08-24 16:43:44,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:43:44,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3724 transitions. [2023-08-24 16:43:44,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 133.0) internal successors, (3724), 28 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:44,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 331.0) internal successors, (9599), 29 states have internal predecessors, (9599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:44,846 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 331.0) internal successors, (9599), 29 states have internal predecessors, (9599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:44,846 INFO L175 Difference]: Start difference. First operand has 601 places, 1927 transitions, 53127 flow. Second operand 28 states and 3724 transitions. [2023-08-24 16:43:44,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 2116 transitions, 61701 flow [2023-08-24 16:43:50,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 2116 transitions, 61138 flow, removed 130 selfloop flow, removed 6 redundant places. [2023-08-24 16:43:50,630 INFO L231 Difference]: Finished difference. Result has 627 places, 2009 transitions, 57325 flow [2023-08-24 16:43:50,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=52401, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=690, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=57325, PETRI_PLACES=627, PETRI_TRANSITIONS=2009} [2023-08-24 16:43:50,631 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 606 predicate places. [2023-08-24 16:43:50,631 INFO L495 AbstractCegarLoop]: Abstraction has has 627 places, 2009 transitions, 57325 flow [2023-08-24 16:43:50,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 129.2941176470588) internal successors, (2198), 17 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:50,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:43:50,632 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:43:50,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 16:43:50,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-24 16:43:50,832 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:43:50,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:43:50,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1006479579, now seen corresponding path program 25 times [2023-08-24 16:43:50,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:43:50,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356871794] [2023-08-24 16:43:50,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:43:50,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:43:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:43:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:43:51,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:43:51,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356871794] [2023-08-24 16:43:51,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356871794] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:43:51,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465859680] [2023-08-24 16:43:51,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:43:51,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:43:51,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:43:51,009 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:43:51,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 16:43:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:43:51,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:43:51,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:43:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:43:51,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:43:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:43:51,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465859680] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:43:51,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:43:51,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 16:43:51,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813750212] [2023-08-24 16:43:51,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:43:51,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:43:51,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:43:51,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:43:51,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:43:51,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:43:51,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 627 places, 2009 transitions, 57325 flow. Second operand has 18 states, 18 states have (on average 129.22222222222223) internal successors, (2326), 18 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:51,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:43:51,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:43:51,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:43:59,404 INFO L124 PetriNetUnfolderBase]: 4543/9795 cut-off events. [2023-08-24 16:43:59,404 INFO L125 PetriNetUnfolderBase]: For 455641/455641 co-relation queries the response was YES. [2023-08-24 16:43:59,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122117 conditions, 9795 events. 4543/9795 cut-off events. For 455641/455641 co-relation queries the response was YES. Maximal size of possible extension queue 743. Compared 91095 event pairs, 1187 based on Foata normal form. 20/9814 useless extension candidates. Maximal degree in co-relation 121226. Up to 5769 conditions per place. [2023-08-24 16:43:59,551 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 1653 selfloop transitions, 464 changer transitions 0/2117 dead transitions. [2023-08-24 16:43:59,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 649 places, 2117 transitions, 63692 flow [2023-08-24 16:43:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 16:43:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 16:43:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3181 transitions. [2023-08-24 16:43:59,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004279959718026 [2023-08-24 16:43:59,553 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3181 transitions. [2023-08-24 16:43:59,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3181 transitions. [2023-08-24 16:43:59,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:43:59,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3181 transitions. [2023-08-24 16:43:59,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 132.54166666666666) internal successors, (3181), 24 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:59,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 331.0) internal successors, (8275), 25 states have internal predecessors, (8275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:59,559 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 331.0) internal successors, (8275), 25 states have internal predecessors, (8275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:43:59,559 INFO L175 Difference]: Start difference. First operand has 627 places, 2009 transitions, 57325 flow. Second operand 24 states and 3181 transitions. [2023-08-24 16:43:59,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 649 places, 2117 transitions, 63692 flow [2023-08-24 16:44:06,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 637 places, 2117 transitions, 62395 flow, removed 572 selfloop flow, removed 12 redundant places. [2023-08-24 16:44:06,348 INFO L231 Difference]: Finished difference. Result has 645 places, 2046 transitions, 58609 flow [2023-08-24 16:44:06,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=55941, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2005, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=58609, PETRI_PLACES=645, PETRI_TRANSITIONS=2046} [2023-08-24 16:44:06,349 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 624 predicate places. [2023-08-24 16:44:06,349 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 2046 transitions, 58609 flow [2023-08-24 16:44:06,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 129.22222222222223) internal successors, (2326), 18 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:06,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:44:06,350 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:44:06,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-24 16:44:06,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:44:06,554 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:44:06,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:44:06,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2050603443, now seen corresponding path program 26 times [2023-08-24 16:44:06,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:44:06,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058900970] [2023-08-24 16:44:06,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:44:06,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:44:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:44:06,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:44:06,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:44:06,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058900970] [2023-08-24 16:44:06,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058900970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:44:06,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571225354] [2023-08-24 16:44:06,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:44:06,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:44:06,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:44:06,696 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:44:06,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 16:44:06,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:44:06,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:44:06,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:44:06,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:44:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:44:06,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:44:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:44:06,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571225354] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:44:06,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:44:06,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-24 16:44:06,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430202190] [2023-08-24 16:44:06,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:44:06,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:44:06,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:44:06,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:44:06,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:44:06,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:44:06,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 2046 transitions, 58609 flow. Second operand has 18 states, 18 states have (on average 128.77777777777777) internal successors, (2318), 18 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:06,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:44:06,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:44:06,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:44:14,912 INFO L124 PetriNetUnfolderBase]: 4815/10416 cut-off events. [2023-08-24 16:44:14,912 INFO L125 PetriNetUnfolderBase]: For 470803/470803 co-relation queries the response was YES. [2023-08-24 16:44:15,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127754 conditions, 10416 events. 4815/10416 cut-off events. For 470803/470803 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 98004 event pairs, 1174 based on Foata normal form. 14/10429 useless extension candidates. Maximal degree in co-relation 126871. Up to 5101 conditions per place. [2023-08-24 16:44:15,075 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 1663 selfloop transitions, 553 changer transitions 4/2220 dead transitions. [2023-08-24 16:44:15,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 2220 transitions, 66859 flow [2023-08-24 16:44:15,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 16:44:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 16:44:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2777 transitions. [2023-08-24 16:44:15,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3995108617465113 [2023-08-24 16:44:15,077 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2777 transitions. [2023-08-24 16:44:15,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2777 transitions. [2023-08-24 16:44:15,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:44:15,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2777 transitions. [2023-08-24 16:44:15,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 132.23809523809524) internal successors, (2777), 21 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:15,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 331.0) internal successors, (7282), 22 states have internal predecessors, (7282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:15,081 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 331.0) internal successors, (7282), 22 states have internal predecessors, (7282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:15,081 INFO L175 Difference]: Start difference. First operand has 645 places, 2046 transitions, 58609 flow. Second operand 21 states and 2777 transitions. [2023-08-24 16:44:15,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 2220 transitions, 66859 flow [2023-08-24 16:44:21,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 653 places, 2220 transitions, 66268 flow, removed 219 selfloop flow, removed 12 redundant places. [2023-08-24 16:44:21,637 INFO L231 Difference]: Finished difference. Result has 660 places, 2129 transitions, 62033 flow [2023-08-24 16:44:21,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=57966, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2044, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=62033, PETRI_PLACES=660, PETRI_TRANSITIONS=2129} [2023-08-24 16:44:21,638 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 639 predicate places. [2023-08-24 16:44:21,639 INFO L495 AbstractCegarLoop]: Abstraction has has 660 places, 2129 transitions, 62033 flow [2023-08-24 16:44:21,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.77777777777777) internal successors, (2318), 18 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:21,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:44:21,639 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:44:21,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 16:44:21,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-24 16:44:21,840 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:44:21,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:44:21,840 INFO L85 PathProgramCache]: Analyzing trace with hash -804270371, now seen corresponding path program 27 times [2023-08-24 16:44:21,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:44:21,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188073610] [2023-08-24 16:44:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:44:21,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:44:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:44:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:44:21,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:44:21,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188073610] [2023-08-24 16:44:21,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188073610] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:44:21,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538624634] [2023-08-24 16:44:21,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:44:21,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:44:21,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:44:21,973 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:44:21,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 16:44:22,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 16:44:22,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:44:22,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:44:22,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:44:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:44:22,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:44:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:44:22,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538624634] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:44:22,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:44:22,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-24 16:44:22,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726644919] [2023-08-24 16:44:22,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:44:22,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:44:22,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:44:22,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:44:22,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:44:22,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:44:22,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 660 places, 2129 transitions, 62033 flow. Second operand has 18 states, 18 states have (on average 128.77777777777777) internal successors, (2318), 18 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:22,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:44:22,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:44:22,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:44:30,174 INFO L124 PetriNetUnfolderBase]: 4840/10439 cut-off events. [2023-08-24 16:44:30,175 INFO L125 PetriNetUnfolderBase]: For 490919/490919 co-relation queries the response was YES. [2023-08-24 16:44:30,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131179 conditions, 10439 events. 4840/10439 cut-off events. For 490919/490919 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 98050 event pairs, 1287 based on Foata normal form. 11/10449 useless extension candidates. Maximal degree in co-relation 130089. Up to 5343 conditions per place. [2023-08-24 16:44:30,431 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 1808 selfloop transitions, 388 changer transitions 11/2207 dead transitions. [2023-08-24 16:44:30,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 678 places, 2207 transitions, 68093 flow [2023-08-24 16:44:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 16:44:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 16:44:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2634 transitions. [2023-08-24 16:44:30,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39788519637462233 [2023-08-24 16:44:30,433 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2634 transitions. [2023-08-24 16:44:30,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2634 transitions. [2023-08-24 16:44:30,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:44:30,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2634 transitions. [2023-08-24 16:44:30,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 131.7) internal successors, (2634), 20 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:30,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 331.0) internal successors, (6951), 21 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:30,440 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 331.0) internal successors, (6951), 21 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:30,440 INFO L175 Difference]: Start difference. First operand has 660 places, 2129 transitions, 62033 flow. Second operand 20 states and 2634 transitions. [2023-08-24 16:44:30,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 678 places, 2207 transitions, 68093 flow [2023-08-24 16:44:37,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 670 places, 2207 transitions, 67755 flow, removed 30 selfloop flow, removed 8 redundant places. [2023-08-24 16:44:37,272 INFO L231 Difference]: Finished difference. Result has 675 places, 2132 transitions, 62996 flow [2023-08-24 16:44:37,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=61432, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=62996, PETRI_PLACES=675, PETRI_TRANSITIONS=2132} [2023-08-24 16:44:37,273 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 654 predicate places. [2023-08-24 16:44:37,273 INFO L495 AbstractCegarLoop]: Abstraction has has 675 places, 2132 transitions, 62996 flow [2023-08-24 16:44:37,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.77777777777777) internal successors, (2318), 18 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:37,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:44:37,274 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:44:37,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-24 16:44:37,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-24 16:44:37,474 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:44:37,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:44:37,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1547551941, now seen corresponding path program 28 times [2023-08-24 16:44:37,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:44:37,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730863454] [2023-08-24 16:44:37,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:44:37,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:44:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:44:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:44:37,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:44:37,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730863454] [2023-08-24 16:44:37,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730863454] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:44:37,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937651886] [2023-08-24 16:44:37,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:44:37,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:44:37,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:44:37,633 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:44:37,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 16:44:37,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:44:37,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:44:37,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:44:37,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:44:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:44:37,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:44:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:44:37,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937651886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:44:37,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:44:37,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-24 16:44:37,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567494524] [2023-08-24 16:44:37,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:44:37,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 16:44:37,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:44:37,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 16:44:37,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-08-24 16:44:37,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:44:37,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 2132 transitions, 62996 flow. Second operand has 16 states, 16 states have (on average 129.0) internal successors, (2064), 16 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:37,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:44:37,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:44:37,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:44:46,176 INFO L124 PetriNetUnfolderBase]: 4903/10526 cut-off events. [2023-08-24 16:44:46,176 INFO L125 PetriNetUnfolderBase]: For 507152/507152 co-relation queries the response was YES. [2023-08-24 16:44:46,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135357 conditions, 10526 events. 4903/10526 cut-off events. For 507152/507152 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 98753 event pairs, 1875 based on Foata normal form. 44/10569 useless extension candidates. Maximal degree in co-relation 134875. Up to 9641 conditions per place. [2023-08-24 16:44:46,350 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 1945 selfloop transitions, 284 changer transitions 0/2229 dead transitions. [2023-08-24 16:44:46,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 692 places, 2229 transitions, 69456 flow [2023-08-24 16:44:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 16:44:46,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 16:44:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3044 transitions. [2023-08-24 16:44:46,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.399842374885065 [2023-08-24 16:44:46,352 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3044 transitions. [2023-08-24 16:44:46,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3044 transitions. [2023-08-24 16:44:46,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:44:46,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3044 transitions. [2023-08-24 16:44:46,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 132.34782608695653) internal successors, (3044), 23 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:46,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 331.0) internal successors, (7944), 24 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:46,357 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 331.0) internal successors, (7944), 24 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:46,358 INFO L175 Difference]: Start difference. First operand has 675 places, 2132 transitions, 62996 flow. Second operand 23 states and 3044 transitions. [2023-08-24 16:44:46,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 692 places, 2229 transitions, 69456 flow [2023-08-24 16:44:53,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 2229 transitions, 69109 flow, removed 56 selfloop flow, removed 9 redundant places. [2023-08-24 16:44:53,414 INFO L231 Difference]: Finished difference. Result has 690 places, 2156 transitions, 64208 flow [2023-08-24 16:44:53,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=62399, PETRI_DIFFERENCE_MINUEND_PLACES=661, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1857, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=64208, PETRI_PLACES=690, PETRI_TRANSITIONS=2156} [2023-08-24 16:44:53,417 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 669 predicate places. [2023-08-24 16:44:53,417 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 2156 transitions, 64208 flow [2023-08-24 16:44:53,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 129.0) internal successors, (2064), 16 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:53,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:44:53,417 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:44:53,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 16:44:53,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 16:44:53,622 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:44:53,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:44:53,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1274040963, now seen corresponding path program 29 times [2023-08-24 16:44:53,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:44:53,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693998196] [2023-08-24 16:44:53,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:44:53,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:44:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:44:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:44:53,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:44:53,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693998196] [2023-08-24 16:44:53,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693998196] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:44:53,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906904823] [2023-08-24 16:44:53,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:44:53,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:44:53,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:44:53,759 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:44:53,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 16:44:53,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 16:44:53,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:44:53,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:44:53,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:44:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:44:53,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:44:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:44:54,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906904823] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:44:54,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:44:54,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-24 16:44:54,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320830210] [2023-08-24 16:44:54,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:44:54,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 16:44:54,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:44:54,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 16:44:54,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-08-24 16:44:54,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:44:54,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 2156 transitions, 64208 flow. Second operand has 16 states, 16 states have (on average 129.1875) internal successors, (2067), 16 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:44:54,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:44:54,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:44:54,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:45:02,993 INFO L124 PetriNetUnfolderBase]: 5038/10779 cut-off events. [2023-08-24 16:45:02,993 INFO L125 PetriNetUnfolderBase]: For 541838/541838 co-relation queries the response was YES. [2023-08-24 16:45:03,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139573 conditions, 10779 events. 5038/10779 cut-off events. For 541838/541838 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 101186 event pairs, 2004 based on Foata normal form. 46/10824 useless extension candidates. Maximal degree in co-relation 139109. Up to 10162 conditions per place. [2023-08-24 16:45:03,173 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 2099 selfloop transitions, 195 changer transitions 4/2298 dead transitions. [2023-08-24 16:45:03,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 2298 transitions, 72094 flow [2023-08-24 16:45:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 16:45:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 16:45:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3848 transitions. [2023-08-24 16:45:03,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40087509115532866 [2023-08-24 16:45:03,176 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3848 transitions. [2023-08-24 16:45:03,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3848 transitions. [2023-08-24 16:45:03,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:45:03,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3848 transitions. [2023-08-24 16:45:03,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 132.68965517241378) internal successors, (3848), 29 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:45:03,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 331.0) internal successors, (9930), 30 states have internal predecessors, (9930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:45:03,182 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 331.0) internal successors, (9930), 30 states have internal predecessors, (9930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:45:03,182 INFO L175 Difference]: Start difference. First operand has 690 places, 2156 transitions, 64208 flow. Second operand 29 states and 3848 transitions. [2023-08-24 16:45:03,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 2298 transitions, 72094 flow [2023-08-24 16:45:10,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 707 places, 2298 transitions, 71666 flow, removed 146 selfloop flow, removed 11 redundant places. [2023-08-24 16:45:10,940 INFO L231 Difference]: Finished difference. Result has 723 places, 2206 transitions, 66290 flow [2023-08-24 16:45:10,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=63728, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1978, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=66290, PETRI_PLACES=723, PETRI_TRANSITIONS=2206} [2023-08-24 16:45:10,942 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 702 predicate places. [2023-08-24 16:45:10,942 INFO L495 AbstractCegarLoop]: Abstraction has has 723 places, 2206 transitions, 66290 flow [2023-08-24 16:45:10,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 129.1875) internal successors, (2067), 16 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:45:10,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:45:10,942 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:45:10,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-24 16:45:11,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-24 16:45:11,143 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:45:11,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:45:11,143 INFO L85 PathProgramCache]: Analyzing trace with hash -111030947, now seen corresponding path program 30 times [2023-08-24 16:45:11,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:45:11,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368111428] [2023-08-24 16:45:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:45:11,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:45:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:45:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:45:11,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:45:11,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368111428] [2023-08-24 16:45:11,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368111428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:45:11,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459136946] [2023-08-24 16:45:11,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:45:11,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:45:11,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:45:11,321 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:45:11,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 16:45:11,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 16:45:11,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:45:11,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:45:11,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:45:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:45:11,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:45:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:45:11,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459136946] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:45:11,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:45:11,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-24 16:45:11,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6428730] [2023-08-24 16:45:11,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:45:11,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 16:45:11,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:45:11,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 16:45:11,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-24 16:45:11,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:45:11,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 723 places, 2206 transitions, 66290 flow. Second operand has 19 states, 19 states have (on average 129.05263157894737) internal successors, (2452), 19 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:45:11,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:45:11,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:45:11,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:45:21,076 INFO L124 PetriNetUnfolderBase]: 5151/10978 cut-off events. [2023-08-24 16:45:21,076 INFO L125 PetriNetUnfolderBase]: For 577509/577509 co-relation queries the response was YES. [2023-08-24 16:45:21,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144512 conditions, 10978 events. 5151/10978 cut-off events. For 577509/577509 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 103031 event pairs, 1336 based on Foata normal form. 30/11007 useless extension candidates. Maximal degree in co-relation 144294. Up to 6512 conditions per place. [2023-08-24 16:45:21,301 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 1736 selfloop transitions, 609 changer transitions 5/2350 dead transitions. [2023-08-24 16:45:21,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 749 places, 2350 transitions, 74897 flow [2023-08-24 16:45:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 16:45:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 16:45:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3848 transitions. [2023-08-24 16:45:21,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40087509115532866 [2023-08-24 16:45:21,304 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3848 transitions. [2023-08-24 16:45:21,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3848 transitions. [2023-08-24 16:45:21,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:45:21,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3848 transitions. [2023-08-24 16:45:21,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 132.68965517241378) internal successors, (3848), 29 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:45:21,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 331.0) internal successors, (9930), 30 states have internal predecessors, (9930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:45:21,314 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 331.0) internal successors, (9930), 30 states have internal predecessors, (9930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:45:21,314 INFO L175 Difference]: Start difference. First operand has 723 places, 2206 transitions, 66290 flow. Second operand 29 states and 3848 transitions. [2023-08-24 16:45:21,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 749 places, 2350 transitions, 74897 flow [2023-08-24 16:45:29,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 742 places, 2350 transitions, 74041 flow, removed 354 selfloop flow, removed 7 redundant places. [2023-08-24 16:45:29,737 INFO L231 Difference]: Finished difference. Result has 749 places, 2270 transitions, 70013 flow [2023-08-24 16:45:29,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=65249, PETRI_DIFFERENCE_MINUEND_PLACES=714, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=70013, PETRI_PLACES=749, PETRI_TRANSITIONS=2270} [2023-08-24 16:45:29,739 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 728 predicate places. [2023-08-24 16:45:29,740 INFO L495 AbstractCegarLoop]: Abstraction has has 749 places, 2270 transitions, 70013 flow [2023-08-24 16:45:29,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 129.05263157894737) internal successors, (2452), 19 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:45:29,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:45:29,740 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:45:29,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 16:45:29,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-08-24 16:45:29,941 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:45:29,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:45:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash 120417537, now seen corresponding path program 31 times [2023-08-24 16:45:29,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:45:29,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518403240] [2023-08-24 16:45:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:45:29,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:45:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:45:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:45:30,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:45:30,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518403240] [2023-08-24 16:45:30,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518403240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:45:30,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973823965] [2023-08-24 16:45:30,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:45:30,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:45:30,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:45:30,066 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:45:30,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 16:45:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:45:30,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:45:30,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:45:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:45:30,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:45:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:45:30,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973823965] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:45:30,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:45:30,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-08-24 16:45:30,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405838810] [2023-08-24 16:45:30,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:45:30,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:45:30,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:45:30,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:45:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:45:30,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:45:30,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 2270 transitions, 70013 flow. Second operand has 17 states, 17 states have (on average 128.8235294117647) internal successors, (2190), 17 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:45:30,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:45:30,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:45:30,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:45:40,140 INFO L124 PetriNetUnfolderBase]: 5375/11363 cut-off events. [2023-08-24 16:45:40,141 INFO L125 PetriNetUnfolderBase]: For 625986/625986 co-relation queries the response was YES. [2023-08-24 16:45:40,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152796 conditions, 11363 events. 5375/11363 cut-off events. For 625986/625986 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 106296 event pairs, 1369 based on Foata normal form. 41/11403 useless extension candidates. Maximal degree in co-relation 152570. Up to 5895 conditions per place. [2023-08-24 16:45:40,355 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 1904 selfloop transitions, 500 changer transitions 6/2410 dead transitions. [2023-08-24 16:45:40,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 772 places, 2410 transitions, 78901 flow [2023-08-24 16:45:40,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 16:45:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 16:45:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3165 transitions. [2023-08-24 16:45:40,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39841389728096677 [2023-08-24 16:45:40,358 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3165 transitions. [2023-08-24 16:45:40,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3165 transitions. [2023-08-24 16:45:40,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:45:40,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3165 transitions. [2023-08-24 16:45:40,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 131.875) internal successors, (3165), 24 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:45:40,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 331.0) internal successors, (8275), 25 states have internal predecessors, (8275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:45:40,366 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 331.0) internal successors, (8275), 25 states have internal predecessors, (8275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:45:40,366 INFO L175 Difference]: Start difference. First operand has 749 places, 2270 transitions, 70013 flow. Second operand 24 states and 3165 transitions. [2023-08-24 16:45:40,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 772 places, 2410 transitions, 78901 flow [2023-08-24 16:45:49,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 760 places, 2410 transitions, 76403 flow, removed 1137 selfloop flow, removed 12 redundant places. [2023-08-24 16:45:49,691 INFO L231 Difference]: Finished difference. Result has 768 places, 2342 transitions, 72353 flow [2023-08-24 16:45:49,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=67203, PETRI_DIFFERENCE_MINUEND_PLACES=737, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1795, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=72353, PETRI_PLACES=768, PETRI_TRANSITIONS=2342} [2023-08-24 16:45:49,693 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 747 predicate places. [2023-08-24 16:45:49,693 INFO L495 AbstractCegarLoop]: Abstraction has has 768 places, 2342 transitions, 72353 flow [2023-08-24 16:45:49,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 128.8235294117647) internal successors, (2190), 17 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:45:49,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:45:49,693 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:45:49,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-24 16:45:49,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:45:49,898 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:45:49,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:45:49,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1492561653, now seen corresponding path program 32 times [2023-08-24 16:45:49,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:45:49,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259170690] [2023-08-24 16:45:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:45:49,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:45:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:45:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:45:50,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:45:50,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259170690] [2023-08-24 16:45:50,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259170690] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:45:50,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196320989] [2023-08-24 16:45:50,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:45:50,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:45:50,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:45:50,015 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:45:50,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 16:45:50,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:45:50,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:45:50,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:45:50,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:45:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:45:50,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:45:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:45:50,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196320989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:45:50,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:45:50,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-24 16:45:50,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724273592] [2023-08-24 16:45:50,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:45:50,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:45:50,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:45:50,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:45:50,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:45:50,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:45:50,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 2342 transitions, 72353 flow. Second operand has 18 states, 18 states have (on average 128.88888888888889) internal successors, (2320), 18 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:45:50,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:45:50,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:45:50,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:46:00,438 INFO L124 PetriNetUnfolderBase]: 5396/11426 cut-off events. [2023-08-24 16:46:00,438 INFO L125 PetriNetUnfolderBase]: For 661651/661651 co-relation queries the response was YES. [2023-08-24 16:46:00,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153501 conditions, 11426 events. 5396/11426 cut-off events. For 661651/661651 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 107211 event pairs, 1464 based on Foata normal form. 12/11437 useless extension candidates. Maximal degree in co-relation 153270. Up to 5986 conditions per place. [2023-08-24 16:46:00,672 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 2004 selfloop transitions, 391 changer transitions 11/2406 dead transitions. [2023-08-24 16:46:00,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 787 places, 2406 transitions, 78450 flow [2023-08-24 16:46:00,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 16:46:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 16:46:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2894 transitions. [2023-08-24 16:46:00,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39741829167811044 [2023-08-24 16:46:00,675 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2894 transitions. [2023-08-24 16:46:00,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2894 transitions. [2023-08-24 16:46:00,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:46:00,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2894 transitions. [2023-08-24 16:46:00,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 131.54545454545453) internal successors, (2894), 22 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:46:00,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 331.0) internal successors, (7613), 23 states have internal predecessors, (7613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:46:00,680 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 331.0) internal successors, (7613), 23 states have internal predecessors, (7613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:46:00,680 INFO L175 Difference]: Start difference. First operand has 768 places, 2342 transitions, 72353 flow. Second operand 22 states and 2894 transitions. [2023-08-24 16:46:00,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 787 places, 2406 transitions, 78450 flow [2023-08-24 16:46:10,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 2406 transitions, 77122 flow, removed 634 selfloop flow, removed 9 redundant places. [2023-08-24 16:46:10,689 INFO L231 Difference]: Finished difference. Result has 783 places, 2341 transitions, 72333 flow [2023-08-24 16:46:10,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=70893, PETRI_DIFFERENCE_MINUEND_PLACES=757, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1949, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=72333, PETRI_PLACES=783, PETRI_TRANSITIONS=2341} [2023-08-24 16:46:10,692 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 762 predicate places. [2023-08-24 16:46:10,692 INFO L495 AbstractCegarLoop]: Abstraction has has 783 places, 2341 transitions, 72333 flow [2023-08-24 16:46:10,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.88888888888889) internal successors, (2320), 18 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:46:10,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:46:10,693 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:46:10,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-24 16:46:10,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-24 16:46:10,898 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:46:10,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:46:10,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1625283329, now seen corresponding path program 33 times [2023-08-24 16:46:10,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:46:10,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157895665] [2023-08-24 16:46:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:46:10,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:46:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:46:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:46:11,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:46:11,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157895665] [2023-08-24 16:46:11,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157895665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:46:11,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745031389] [2023-08-24 16:46:11,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:46:11,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:46:11,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:46:11,118 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:46:11,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 16:46:11,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 16:46:11,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:46:11,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:46:11,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:46:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:46:11,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:46:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:46:11,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745031389] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:46:11,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:46:11,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-24 16:46:11,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742290650] [2023-08-24 16:46:11,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:46:11,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:46:11,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:46:11,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:46:11,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:46:11,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:46:11,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 783 places, 2341 transitions, 72333 flow. Second operand has 17 states, 17 states have (on average 128.94117647058823) internal successors, (2192), 17 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:46:11,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:46:11,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:46:11,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:46:21,111 INFO L124 PetriNetUnfolderBase]: 5360/11342 cut-off events. [2023-08-24 16:46:21,112 INFO L125 PetriNetUnfolderBase]: For 678217/678217 co-relation queries the response was YES. [2023-08-24 16:46:21,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151364 conditions, 11342 events. 5360/11342 cut-off events. For 678217/678217 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 106497 event pairs, 1405 based on Foata normal form. 88/11429 useless extension candidates. Maximal degree in co-relation 151129. Up to 6725 conditions per place. [2023-08-24 16:46:21,321 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 1871 selfloop transitions, 548 changer transitions 1/2420 dead transitions. [2023-08-24 16:46:21,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 801 places, 2420 transitions, 78320 flow [2023-08-24 16:46:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 16:46:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 16:46:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3175 transitions. [2023-08-24 16:46:21,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39967270896273915 [2023-08-24 16:46:21,323 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3175 transitions. [2023-08-24 16:46:21,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3175 transitions. [2023-08-24 16:46:21,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:46:21,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3175 transitions. [2023-08-24 16:46:21,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 132.29166666666666) internal successors, (3175), 24 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:46:21,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 331.0) internal successors, (8275), 25 states have internal predecessors, (8275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:46:21,329 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 331.0) internal successors, (8275), 25 states have internal predecessors, (8275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:46:21,329 INFO L175 Difference]: Start difference. First operand has 783 places, 2341 transitions, 72333 flow. Second operand 24 states and 3175 transitions. [2023-08-24 16:46:21,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 801 places, 2420 transitions, 78320 flow [2023-08-24 16:46:30,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 777 places, 2420 transitions, 77302 flow, removed 247 selfloop flow, removed 24 redundant places. [2023-08-24 16:46:30,632 INFO L231 Difference]: Finished difference. Result has 782 places, 2352 transitions, 73164 flow [2023-08-24 16:46:30,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=70923, PETRI_DIFFERENCE_MINUEND_PLACES=754, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=527, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=73164, PETRI_PLACES=782, PETRI_TRANSITIONS=2352} [2023-08-24 16:46:30,635 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 761 predicate places. [2023-08-24 16:46:30,635 INFO L495 AbstractCegarLoop]: Abstraction has has 782 places, 2352 transitions, 73164 flow [2023-08-24 16:46:30,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 128.94117647058823) internal successors, (2192), 17 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:46:30,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:46:30,635 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:46:30,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-24 16:46:30,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:46:30,841 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:46:30,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:46:30,841 INFO L85 PathProgramCache]: Analyzing trace with hash -2086362357, now seen corresponding path program 34 times [2023-08-24 16:46:30,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:46:30,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707533435] [2023-08-24 16:46:30,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:46:30,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:46:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:46:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:46:30,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:46:30,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707533435] [2023-08-24 16:46:30,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707533435] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:46:30,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747375326] [2023-08-24 16:46:30,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:46:30,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:46:30,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:46:30,985 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:46:30,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-24 16:46:31,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:46:31,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:46:31,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:46:31,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:46:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:46:31,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:46:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:46:31,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747375326] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:46:31,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:46:31,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-24 16:46:31,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535223586] [2023-08-24 16:46:31,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:46:31,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:46:31,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:46:31,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:46:31,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:46:31,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:46:31,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 782 places, 2352 transitions, 73164 flow. Second operand has 18 states, 18 states have (on average 128.88888888888889) internal successors, (2320), 18 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:46:31,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:46:31,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:46:31,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:46:40,682 INFO L124 PetriNetUnfolderBase]: 5429/11500 cut-off events. [2023-08-24 16:46:40,682 INFO L125 PetriNetUnfolderBase]: For 734854/734854 co-relation queries the response was YES. [2023-08-24 16:46:40,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156361 conditions, 11500 events. 5429/11500 cut-off events. For 734854/734854 co-relation queries the response was YES. Maximal size of possible extension queue 881. Compared 108249 event pairs, 1795 based on Foata normal form. 26/11525 useless extension candidates. Maximal degree in co-relation 156133. Up to 8969 conditions per place. [2023-08-24 16:46:40,889 INFO L140 encePairwiseOnDemand]: 326/331 looper letters, 1944 selfloop transitions, 493 changer transitions 4/2441 dead transitions. [2023-08-24 16:46:40,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 795 places, 2441 transitions, 80660 flow [2023-08-24 16:46:40,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 16:46:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 16:46:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2123 transitions. [2023-08-24 16:46:40,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.400868580060423 [2023-08-24 16:46:40,891 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2123 transitions. [2023-08-24 16:46:40,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2123 transitions. [2023-08-24 16:46:40,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:46:40,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2123 transitions. [2023-08-24 16:46:40,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 132.6875) internal successors, (2123), 16 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:46:40,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 331.0) internal successors, (5627), 17 states have internal predecessors, (5627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:46:40,895 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 331.0) internal successors, (5627), 17 states have internal predecessors, (5627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:46:40,895 INFO L175 Difference]: Start difference. First operand has 782 places, 2352 transitions, 73164 flow. Second operand 16 states and 2123 transitions. [2023-08-24 16:46:40,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 795 places, 2441 transitions, 80660 flow [2023-08-24 16:46:50,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 776 places, 2441 transitions, 79636 flow, removed 169 selfloop flow, removed 19 redundant places. [2023-08-24 16:46:50,749 INFO L231 Difference]: Finished difference. Result has 779 places, 2365 transitions, 74597 flow [2023-08-24 16:46:50,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=72020, PETRI_DIFFERENCE_MINUEND_PLACES=761, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1864, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=74597, PETRI_PLACES=779, PETRI_TRANSITIONS=2365} [2023-08-24 16:46:50,751 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 758 predicate places. [2023-08-24 16:46:50,751 INFO L495 AbstractCegarLoop]: Abstraction has has 779 places, 2365 transitions, 74597 flow [2023-08-24 16:46:50,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.88888888888889) internal successors, (2320), 18 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:46:50,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:46:50,751 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:46:50,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-24 16:46:50,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-24 16:46:50,952 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:46:50,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:46:50,952 INFO L85 PathProgramCache]: Analyzing trace with hash 406998773, now seen corresponding path program 35 times [2023-08-24 16:46:50,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:46:50,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973359162] [2023-08-24 16:46:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:46:50,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:46:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:46:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:46:51,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:46:51,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973359162] [2023-08-24 16:46:51,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973359162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:46:51,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997720832] [2023-08-24 16:46:51,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:46:51,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:46:51,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:46:51,101 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:46:51,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-24 16:46:51,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 16:46:51,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:46:51,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:46:51,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:46:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:46:51,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:46:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:46:51,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997720832] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:46:51,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:46:51,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-24 16:46:51,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297667924] [2023-08-24 16:46:51,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:46:51,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:46:51,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:46:51,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:46:51,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:46:51,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:46:51,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 779 places, 2365 transitions, 74597 flow. Second operand has 17 states, 17 states have (on average 128.94117647058823) internal successors, (2192), 17 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:46:51,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:46:51,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:46:51,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:47:02,530 INFO L124 PetriNetUnfolderBase]: 5863/12172 cut-off events. [2023-08-24 16:47:02,530 INFO L125 PetriNetUnfolderBase]: For 778408/778408 co-relation queries the response was YES. [2023-08-24 16:47:02,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168402 conditions, 12172 events. 5863/12172 cut-off events. For 778408/778408 co-relation queries the response was YES. Maximal size of possible extension queue 949. Compared 113731 event pairs, 1843 based on Foata normal form. 124/12295 useless extension candidates. Maximal degree in co-relation 168171. Up to 9811 conditions per place. [2023-08-24 16:47:02,816 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 1889 selfloop transitions, 821 changer transitions 0/2710 dead transitions. [2023-08-24 16:47:02,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 814 places, 2710 transitions, 90062 flow [2023-08-24 16:47:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 16:47:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 16:47:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4729 transitions. [2023-08-24 16:47:02,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968613628734475 [2023-08-24 16:47:02,819 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4729 transitions. [2023-08-24 16:47:02,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4729 transitions. [2023-08-24 16:47:02,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:47:02,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4729 transitions. [2023-08-24 16:47:02,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 131.36111111111111) internal successors, (4729), 36 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:47:02,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 331.0) internal successors, (12247), 37 states have internal predecessors, (12247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:47:02,827 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 331.0) internal successors, (12247), 37 states have internal predecessors, (12247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:47:02,827 INFO L175 Difference]: Start difference. First operand has 779 places, 2365 transitions, 74597 flow. Second operand 36 states and 4729 transitions. [2023-08-24 16:47:02,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 814 places, 2710 transitions, 90062 flow [2023-08-24 16:47:13,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 804 places, 2710 transitions, 89749 flow, removed 91 selfloop flow, removed 10 redundant places. [2023-08-24 16:47:14,007 INFO L231 Difference]: Finished difference. Result has 817 places, 2616 transitions, 85737 flow [2023-08-24 16:47:14,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=74125, PETRI_DIFFERENCE_MINUEND_PLACES=769, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=581, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=85737, PETRI_PLACES=817, PETRI_TRANSITIONS=2616} [2023-08-24 16:47:14,009 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 796 predicate places. [2023-08-24 16:47:14,009 INFO L495 AbstractCegarLoop]: Abstraction has has 817 places, 2616 transitions, 85737 flow [2023-08-24 16:47:14,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 128.94117647058823) internal successors, (2192), 17 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:47:14,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:47:14,010 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:47:14,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-24 16:47:14,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-24 16:47:14,210 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:47:14,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:47:14,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1776565279, now seen corresponding path program 36 times [2023-08-24 16:47:14,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:47:14,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065500650] [2023-08-24 16:47:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:47:14,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:47:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:47:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:47:14,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:47:14,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065500650] [2023-08-24 16:47:14,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065500650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:47:14,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409313238] [2023-08-24 16:47:14,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:47:14,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:47:14,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:47:14,381 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:47:14,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-24 16:47:14,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 16:47:14,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:47:14,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:47:14,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:47:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:47:14,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:47:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:47:14,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409313238] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:47:14,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:47:14,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 16:47:14,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590832515] [2023-08-24 16:47:14,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:47:14,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:47:14,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:47:14,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:47:14,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:47:14,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:47:14,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 817 places, 2616 transitions, 85737 flow. Second operand has 18 states, 18 states have (on average 128.88888888888889) internal successors, (2320), 18 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:47:14,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:47:14,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:47:14,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:47:27,370 INFO L124 PetriNetUnfolderBase]: 6040/12453 cut-off events. [2023-08-24 16:47:27,371 INFO L125 PetriNetUnfolderBase]: For 859997/859997 co-relation queries the response was YES. [2023-08-24 16:47:27,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178498 conditions, 12453 events. 6040/12453 cut-off events. For 859997/859997 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 115624 event pairs, 180 based on Foata normal form. 76/12528 useless extension candidates. Maximal degree in co-relation 178254. Up to 6560 conditions per place. [2023-08-24 16:47:27,648 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 1953 selfloop transitions, 925 changer transitions 0/2878 dead transitions. [2023-08-24 16:47:27,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 848 places, 2878 transitions, 98785 flow [2023-08-24 16:47:27,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 16:47:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 16:47:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4213 transitions. [2023-08-24 16:47:27,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39775302114803623 [2023-08-24 16:47:27,651 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4213 transitions. [2023-08-24 16:47:27,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4213 transitions. [2023-08-24 16:47:27,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:47:27,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4213 transitions. [2023-08-24 16:47:27,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 131.65625) internal successors, (4213), 32 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:47:27,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 331.0) internal successors, (10923), 33 states have internal predecessors, (10923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:47:27,658 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 331.0) internal successors, (10923), 33 states have internal predecessors, (10923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:47:27,658 INFO L175 Difference]: Start difference. First operand has 817 places, 2616 transitions, 85737 flow. Second operand 32 states and 4213 transitions. [2023-08-24 16:47:27,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 848 places, 2878 transitions, 98785 flow [2023-08-24 16:47:41,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 834 places, 2878 transitions, 98153 flow, removed 220 selfloop flow, removed 14 redundant places. [2023-08-24 16:47:41,612 INFO L231 Difference]: Finished difference. Result has 844 places, 2732 transitions, 91471 flow [2023-08-24 16:47:41,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=84997, PETRI_DIFFERENCE_MINUEND_PLACES=803, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=839, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=91471, PETRI_PLACES=844, PETRI_TRANSITIONS=2732} [2023-08-24 16:47:41,614 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 823 predicate places. [2023-08-24 16:47:41,614 INFO L495 AbstractCegarLoop]: Abstraction has has 844 places, 2732 transitions, 91471 flow [2023-08-24 16:47:41,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.88888888888889) internal successors, (2320), 18 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:47:41,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:47:41,614 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:47:41,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-24 16:47:41,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-24 16:47:41,815 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:47:41,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:47:41,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1241096149, now seen corresponding path program 37 times [2023-08-24 16:47:41,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:47:41,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666844890] [2023-08-24 16:47:41,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:47:41,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:47:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:47:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:47:41,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:47:41,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666844890] [2023-08-24 16:47:41,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666844890] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:47:41,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405120801] [2023-08-24 16:47:41,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:47:41,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:47:41,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:47:41,961 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:47:41,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-24 16:47:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:47:42,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:47:42,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:47:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:47:42,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:47:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 16:47:42,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405120801] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:47:42,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:47:42,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-24 16:47:42,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524416159] [2023-08-24 16:47:42,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:47:42,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 16:47:42,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:47:42,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 16:47:42,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-08-24 16:47:42,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 331 [2023-08-24 16:47:42,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 844 places, 2732 transitions, 91471 flow. Second operand has 16 states, 16 states have (on average 129.0) internal successors, (2064), 16 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:47:42,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:47:42,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 331 [2023-08-24 16:47:42,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:47:54,624 INFO L124 PetriNetUnfolderBase]: 6388/13001 cut-off events. [2023-08-24 16:47:54,624 INFO L125 PetriNetUnfolderBase]: For 918666/918666 co-relation queries the response was YES. [2023-08-24 16:47:54,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192127 conditions, 13001 events. 6388/13001 cut-off events. For 918666/918666 co-relation queries the response was YES. Maximal size of possible extension queue 1011. Compared 120254 event pairs, 128 based on Foata normal form. 40/13040 useless extension candidates. Maximal degree in co-relation 191872. Up to 7440 conditions per place. [2023-08-24 16:47:54,901 INFO L140 encePairwiseOnDemand]: 326/331 looper letters, 2230 selfloop transitions, 793 changer transitions 0/3023 dead transitions. [2023-08-24 16:47:54,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 853 places, 3023 transitions, 108020 flow [2023-08-24 16:47:54,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 16:47:54,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 16:47:54,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1859 transitions. [2023-08-24 16:47:54,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40116529995684075 [2023-08-24 16:47:54,903 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1859 transitions. [2023-08-24 16:47:54,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1859 transitions. [2023-08-24 16:47:54,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:47:54,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1859 transitions. [2023-08-24 16:47:54,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 132.78571428571428) internal successors, (1859), 14 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:47:54,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 331.0) internal successors, (4965), 15 states have internal predecessors, (4965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:47:54,907 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 331.0) internal successors, (4965), 15 states have internal predecessors, (4965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:47:54,907 INFO L175 Difference]: Start difference. First operand has 844 places, 2732 transitions, 91471 flow. Second operand 14 states and 1859 transitions. [2023-08-24 16:47:54,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 853 places, 3023 transitions, 108020 flow [2023-08-24 16:48:10,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 823 places, 3023 transitions, 106057 flow, removed 193 selfloop flow, removed 30 redundant places. [2023-08-24 16:48:10,326 INFO L231 Difference]: Finished difference. Result has 827 places, 2883 transitions, 98487 flow [2023-08-24 16:48:10,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=89504, PETRI_DIFFERENCE_MINUEND_PLACES=810, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=638, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1938, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=98487, PETRI_PLACES=827, PETRI_TRANSITIONS=2883} [2023-08-24 16:48:10,329 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 806 predicate places. [2023-08-24 16:48:10,329 INFO L495 AbstractCegarLoop]: Abstraction has has 827 places, 2883 transitions, 98487 flow [2023-08-24 16:48:10,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 129.0) internal successors, (2064), 16 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:10,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:48:10,330 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:48:10,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-24 16:48:10,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-24 16:48:10,536 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:48:10,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:48:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1969856618, now seen corresponding path program 38 times [2023-08-24 16:48:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:48:10,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92443190] [2023-08-24 16:48:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:48:10,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:48:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:48:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:48:12,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:48:12,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92443190] [2023-08-24 16:48:12,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92443190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:48:12,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822894639] [2023-08-24 16:48:12,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:48:12,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:48:12,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:48:12,470 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:48:12,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-24 16:48:12,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:48:12,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:48:12,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 16:48:12,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:48:12,714 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 16:48:12,758 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 16:48:12,799 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 16:48:13,095 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:48:13,096 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 76 [2023-08-24 16:48:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:48:13,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:48:13,689 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:48:13,690 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 432 treesize of output 252 [2023-08-24 16:48:14,123 INFO L322 Elim1Store]: treesize reduction 5, result has 98.2 percent of original size [2023-08-24 16:48:14,123 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 1298 treesize of output 1357 [2023-08-24 16:48:14,544 INFO L322 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-08-24 16:48:14,544 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 293 treesize of output 413 [2023-08-24 16:48:17,747 INFO L322 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-08-24 16:48:17,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 202 treesize of output 418 [2023-08-24 16:48:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:48:42,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822894639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:48:42,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:48:42,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-24 16:48:42,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707053191] [2023-08-24 16:48:42,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:48:42,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 16:48:42,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:48:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 16:48:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=912, Unknown=3, NotChecked=0, Total=1056 [2023-08-24 16:48:42,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 331 [2023-08-24 16:48:42,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 827 places, 2883 transitions, 98487 flow. Second operand has 33 states, 33 states have (on average 98.63636363636364) internal successors, (3255), 33 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:42,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:48:42,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 331 [2023-08-24 16:48:42,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:49:00,232 INFO L124 PetriNetUnfolderBase]: 8455/17020 cut-off events. [2023-08-24 16:49:00,233 INFO L125 PetriNetUnfolderBase]: For 1318336/1318354 co-relation queries the response was YES. [2023-08-24 16:49:00,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260061 conditions, 17020 events. 8455/17020 cut-off events. For 1318336/1318354 co-relation queries the response was YES. Maximal size of possible extension queue 1323. Compared 163109 event pairs, 522 based on Foata normal form. 22/17017 useless extension candidates. Maximal degree in co-relation 259818. Up to 13292 conditions per place. [2023-08-24 16:49:00,762 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 3026 selfloop transitions, 665 changer transitions 57/3767 dead transitions. [2023-08-24 16:49:00,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 848 places, 3767 transitions, 138726 flow [2023-08-24 16:49:00,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 16:49:00,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 16:49:00,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2286 transitions. [2023-08-24 16:49:00,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3139247459489151 [2023-08-24 16:49:00,765 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2286 transitions. [2023-08-24 16:49:00,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2286 transitions. [2023-08-24 16:49:00,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:49:00,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2286 transitions. [2023-08-24 16:49:00,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 103.9090909090909) internal successors, (2286), 22 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:49:00,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 331.0) internal successors, (7613), 23 states have internal predecessors, (7613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:49:00,771 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 331.0) internal successors, (7613), 23 states have internal predecessors, (7613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:49:00,771 INFO L175 Difference]: Start difference. First operand has 827 places, 2883 transitions, 98487 flow. Second operand 22 states and 2286 transitions. [2023-08-24 16:49:00,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 848 places, 3767 transitions, 138726 flow [2023-08-24 16:49:23,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 840 places, 3767 transitions, 137644 flow, removed 40 selfloop flow, removed 8 redundant places. [2023-08-24 16:49:23,538 INFO L231 Difference]: Finished difference. Result has 853 places, 3470 transitions, 123306 flow [2023-08-24 16:49:23,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=97834, PETRI_DIFFERENCE_MINUEND_PLACES=819, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=123306, PETRI_PLACES=853, PETRI_TRANSITIONS=3470} [2023-08-24 16:49:23,541 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 832 predicate places. [2023-08-24 16:49:23,541 INFO L495 AbstractCegarLoop]: Abstraction has has 853 places, 3470 transitions, 123306 flow [2023-08-24 16:49:23,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 98.63636363636364) internal successors, (3255), 33 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:49:23,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:49:23,546 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:49:23,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-24 16:49:23,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-24 16:49:23,752 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:49:23,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:49:23,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2142637898, now seen corresponding path program 39 times [2023-08-24 16:49:23,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:49:23,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119344857] [2023-08-24 16:49:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:49:23,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:49:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:49:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:49:24,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:49:24,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119344857] [2023-08-24 16:49:24,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119344857] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:49:24,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311515319] [2023-08-24 16:49:24,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:49:24,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:49:24,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:49:24,886 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:49:24,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-24 16:49:25,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 16:49:25,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:49:25,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-24 16:49:25,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:49:25,121 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 16:49:25,151 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 16:49:25,188 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 16:49:25,222 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 16:49:25,460 INFO L322 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2023-08-24 16:49:25,460 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 117 treesize of output 54 [2023-08-24 16:49:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:49:25,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:49:28,491 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:49:28,492 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 1054 treesize of output 479 [2023-08-24 16:49:28,922 INFO L322 Elim1Store]: treesize reduction 5, result has 98.2 percent of original size [2023-08-24 16:49:28,923 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 1232 treesize of output 1307 [2023-08-24 16:49:29,570 INFO L322 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-08-24 16:49:29,571 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 992 treesize of output 944 [2023-08-24 16:49:30,388 INFO L322 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-08-24 16:49:30,388 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 401 treesize of output 533 [2023-08-24 16:50:23,615 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 16:51:24,168 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 16:52:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:52:26,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311515319] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:52:26,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:52:26,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2023-08-24 16:52:26,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463764441] [2023-08-24 16:52:26,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:52:26,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 16:52:26,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:52:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 16:52:26,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=762, Unknown=4, NotChecked=0, Total=930 [2023-08-24 16:52:26,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 331 [2023-08-24 16:52:26,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 853 places, 3470 transitions, 123306 flow. Second operand has 31 states, 31 states have (on average 98.6774193548387) internal successors, (3059), 31 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:26,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:52:26,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 331 [2023-08-24 16:52:26,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:52:37,371 WARN L234 SmtUtils]: Spent 10.20s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:53:05,468 INFO L124 PetriNetUnfolderBase]: 11130/22842 cut-off events. [2023-08-24 16:53:05,468 INFO L125 PetriNetUnfolderBase]: For 2033134/2033150 co-relation queries the response was YES. [2023-08-24 16:53:05,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361520 conditions, 22842 events. 11130/22842 cut-off events. For 2033134/2033150 co-relation queries the response was YES. Maximal size of possible extension queue 1701. Compared 231795 event pairs, 782 based on Foata normal form. 53/22868 useless extension candidates. Maximal degree in co-relation 361267. Up to 15355 conditions per place. [2023-08-24 16:53:06,114 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 3484 selfloop transitions, 1223 changer transitions 60/4786 dead transitions. [2023-08-24 16:53:06,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 881 places, 4786 transitions, 180949 flow [2023-08-24 16:53:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 16:53:06,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 16:53:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3009 transitions. [2023-08-24 16:53:06,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31347015314095217 [2023-08-24 16:53:06,117 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3009 transitions. [2023-08-24 16:53:06,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3009 transitions. [2023-08-24 16:53:06,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:53:06,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3009 transitions. [2023-08-24 16:53:06,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 103.75862068965517) internal successors, (3009), 29 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:06,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 331.0) internal successors, (9930), 30 states have internal predecessors, (9930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:06,126 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 331.0) internal successors, (9930), 30 states have internal predecessors, (9930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:06,126 INFO L175 Difference]: Start difference. First operand has 853 places, 3470 transitions, 123306 flow. Second operand 29 states and 3009 transitions. [2023-08-24 16:53:06,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 881 places, 4786 transitions, 180949 flow [2023-08-24 16:53:44,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 874 places, 4786 transitions, 178841 flow, removed 1025 selfloop flow, removed 7 redundant places. [2023-08-24 16:53:44,598 INFO L231 Difference]: Finished difference. Result has 889 places, 4271 transitions, 157760 flow [2023-08-24 16:53:44,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=121496, PETRI_DIFFERENCE_MINUEND_PLACES=846, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=559, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=157760, PETRI_PLACES=889, PETRI_TRANSITIONS=4271} [2023-08-24 16:53:44,602 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 868 predicate places. [2023-08-24 16:53:44,602 INFO L495 AbstractCegarLoop]: Abstraction has has 889 places, 4271 transitions, 157760 flow [2023-08-24 16:53:44,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 98.6774193548387) internal successors, (3059), 31 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:44,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:53:44,602 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:53:44,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-24 16:53:44,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-24 16:53:44,809 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:53:44,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:53:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash 450458616, now seen corresponding path program 40 times [2023-08-24 16:53:44,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:53:44,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068813275] [2023-08-24 16:53:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:53:44,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:53:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:53:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:53:46,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:53:46,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068813275] [2023-08-24 16:53:46,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068813275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:53:46,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652661453] [2023-08-24 16:53:46,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:53:46,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:53:46,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:53:46,427 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:53:46,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-24 16:53:46,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:53:46,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:53:46,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-24 16:53:46,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:53:46,767 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:53:46,767 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-24 16:53:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:53:46,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:53:47,238 INFO L322 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-24 16:53:47,239 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-08-24 16:53:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 16:53:47,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652661453] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:53:47,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:53:47,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-24 16:53:47,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806824413] [2023-08-24 16:53:47,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:53:47,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 16:53:47,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:53:47,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 16:53:47,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2023-08-24 16:53:47,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 331 [2023-08-24 16:53:47,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 889 places, 4271 transitions, 157760 flow. Second operand has 26 states, 26 states have (on average 98.8076923076923) internal successors, (2569), 26 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:47,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:53:47,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 331 [2023-08-24 16:53:47,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:54:28,074 INFO L124 PetriNetUnfolderBase]: 12722/26228 cut-off events. [2023-08-24 16:54:28,074 INFO L125 PetriNetUnfolderBase]: For 2522828/2522842 co-relation queries the response was YES. [2023-08-24 16:54:28,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427598 conditions, 26228 events. 12722/26228 cut-off events. For 2522828/2522842 co-relation queries the response was YES. Maximal size of possible extension queue 1923. Compared 272702 event pairs, 1036 based on Foata normal form. 36/26244 useless extension candidates. Maximal degree in co-relation 427330. Up to 19223 conditions per place. [2023-08-24 16:54:29,048 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 3797 selfloop transitions, 1122 changer transitions 36/4974 dead transitions. [2023-08-24 16:54:29,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 917 places, 4974 transitions, 194460 flow [2023-08-24 16:54:29,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 16:54:29,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 16:54:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2989 transitions. [2023-08-24 16:54:29,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.311386602771122 [2023-08-24 16:54:29,051 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2989 transitions. [2023-08-24 16:54:29,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2989 transitions. [2023-08-24 16:54:29,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:54:29,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2989 transitions. [2023-08-24 16:54:29,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 103.06896551724138) internal successors, (2989), 29 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:54:29,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 331.0) internal successors, (9930), 30 states have internal predecessors, (9930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:54:29,057 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 331.0) internal successors, (9930), 30 states have internal predecessors, (9930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:54:29,057 INFO L175 Difference]: Start difference. First operand has 889 places, 4271 transitions, 157760 flow. Second operand 29 states and 2989 transitions. [2023-08-24 16:54:29,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 917 places, 4974 transitions, 194460 flow Received shutdown request... [2023-08-24 16:54:30,818 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 16:54:30,818 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 16:54:31,020 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 16:54:31,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-24 16:54:31,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-08-24 16:54:31,221 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-24 16:54:31,222 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 16:54:31,222 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 16:54:31,222 INFO L445 BasicCegarLoop]: Path program histogram: [40, 6, 3, 1, 1] [2023-08-24 16:54:31,224 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 16:54:31,224 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 16:54:31,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 04:54:31 BasicIcfg [2023-08-24 16:54:31,227 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 16:54:31,228 INFO L158 Benchmark]: Toolchain (without parser) took 793094.37ms. Allocated memory was 369.1MB in the beginning and 8.8GB in the end (delta: 8.5GB). Free memory was 344.8MB in the beginning and 7.0GB in the end (delta: -6.6GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. [2023-08-24 16:54:31,228 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 369.1MB. Free memory was 346.5MB in the beginning and 346.4MB in the end (delta: 93.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 16:54:31,228 INFO L158 Benchmark]: CACSL2BoogieTranslator took 289.24ms. Allocated memory is still 369.1MB. Free memory was 344.5MB in the beginning and 333.4MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 16:54:31,228 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.63ms. Allocated memory is still 369.1MB. Free memory was 333.4MB in the beginning and 331.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 16:54:31,228 INFO L158 Benchmark]: Boogie Preprocessor took 48.42ms. Allocated memory is still 369.1MB. Free memory was 331.3MB in the beginning and 329.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 16:54:31,228 INFO L158 Benchmark]: RCFGBuilder took 506.01ms. Allocated memory is still 369.1MB. Free memory was 329.8MB in the beginning and 313.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-24 16:54:31,229 INFO L158 Benchmark]: TraceAbstraction took 792190.94ms. Allocated memory was 369.1MB in the beginning and 8.8GB in the end (delta: 8.5GB). Free memory was 312.4MB in the beginning and 7.0GB in the end (delta: -6.7GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. [2023-08-24 16:54:31,231 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 369.1MB. Free memory was 346.5MB in the beginning and 346.4MB in the end (delta: 93.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 289.24ms. Allocated memory is still 369.1MB. Free memory was 344.5MB in the beginning and 333.4MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 51.63ms. Allocated memory is still 369.1MB. Free memory was 333.4MB in the beginning and 331.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 48.42ms. Allocated memory is still 369.1MB. Free memory was 331.3MB in the beginning and 329.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 506.01ms. Allocated memory is still 369.1MB. Free memory was 329.8MB in the beginning and 313.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 792190.94ms. Allocated memory was 369.1MB in the beginning and 8.8GB in the end (delta: 8.5GB). Free memory was 312.4MB in the beginning and 7.0GB in the end (delta: -6.7GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.5s, 141 PlacesBefore, 21 PlacesAfterwards, 148 TransitionsBefore, 17 TransitionsAfterwards, 1942 CoEnabledTransitionPairs, 7 FixpointIterations, 75 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 20 TrivialYvCompositions, 21 ConcurrentYvCompositions, 11 ChoiceCompositions, 173 TotalNumberOfCompositions, 1977 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1921, independent: 1911, independent conditional: 0, independent unconditional: 1911, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1164, independent: 1159, independent conditional: 0, independent unconditional: 1159, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1921, independent: 752, independent conditional: 0, independent unconditional: 752, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 1164, unknown conditional: 0, unknown unconditional: 1164] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 193 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 792.0s, OverallIterations: 51, TraceHistogramMax: 4, PathProgramHistogramMax: 40, EmptinessCheckTime: 0.0s, AutomataDifference: 535.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.6s, HoareTripleCheckerStatistics: 24 mSolverCounterUnknown, 5251 SdHoareTripleChecker+Valid, 34.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5251 mSDsluCounter, 603 SdHoareTripleChecker+Invalid, 31.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 179 IncrementalHoareTripleChecker+Unchecked, 428 mSDsCounter, 1056 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 24927 IncrementalHoareTripleChecker+Invalid, 26186 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1056 mSolverCounterUnsat, 175 mSDtfsCounter, 24927 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3272 GetRequests, 1782 SyntacticMatches, 44 SemanticMatches, 1446 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14131 ImplicationChecksByTransitivity, 52.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=157760occurred in iteration=50, InterpolantAutomatonStates: 1082, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 236.0s InterpolantComputationTime, 1847 NumberOfCodeBlocks, 1835 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 2556 ConstructedInterpolants, 22 QuantifiedInterpolants, 25738 SizeOfPredicates, 198 NumberOfNonLiveVariables, 8915 ConjunctsInSsa, 728 ConjunctsInUnsatCore, 136 InterpolantComputations, 9 PerfectInterpolantSequences, 538/1352 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown