/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-cond-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 16:48:48,133 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 16:48:48,196 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 16:48:48,201 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 16:48:48,201 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 16:48:48,224 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 16:48:48,224 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 16:48:48,224 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 16:48:48,225 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 16:48:48,228 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 16:48:48,228 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 16:48:48,228 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 16:48:48,228 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 16:48:48,229 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 16:48:48,229 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 16:48:48,229 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 16:48:48,230 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 16:48:48,230 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 16:48:48,230 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 16:48:48,230 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 16:48:48,230 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 16:48:48,231 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 16:48:48,231 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 16:48:48,231 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 16:48:48,231 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 16:48:48,232 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 16:48:48,232 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 16:48:48,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 16:48:48,232 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 16:48:48,232 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 16:48:48,233 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 16:48:48,233 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 16:48:48,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 16:48:48,233 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 16:48:48,233 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 16:48:48,234 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 16:48:48,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 16:48:48,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 16:48:48,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 16:48:48,502 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 16:48:48,502 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 16:48:48,503 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2023-08-24 16:48:49,466 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 16:48:49,641 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 16:48:49,642 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2023-08-24 16:48:49,648 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc5760f58/1f74d85eefdb4286a9a9182d8097523e/FLAGb9158dd78 [2023-08-24 16:48:49,658 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc5760f58/1f74d85eefdb4286a9a9182d8097523e [2023-08-24 16:48:49,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 16:48:49,660 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 16:48:49,661 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 16:48:49,661 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 16:48:49,663 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 16:48:49,663 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:48:49" (1/1) ... [2023-08-24 16:48:49,664 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78842e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:48:49, skipping insertion in model container [2023-08-24 16:48:49,664 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:48:49" (1/1) ... [2023-08-24 16:48:49,679 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 16:48:49,834 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-cond-3.wvr.c[2641,2654] [2023-08-24 16:48:49,844 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 16:48:49,850 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 16:48:49,879 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-cond-3.wvr.c[2641,2654] [2023-08-24 16:48:49,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 16:48:49,892 INFO L206 MainTranslator]: Completed translation [2023-08-24 16:48:49,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:48:49 WrapperNode [2023-08-24 16:48:49,893 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 16:48:49,893 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 16:48:49,894 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 16:48:49,894 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 16:48:49,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:48:49" (1/1) ... [2023-08-24 16:48:49,911 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:48:49" (1/1) ... [2023-08-24 16:48:49,935 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 166 [2023-08-24 16:48:49,935 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 16:48:49,936 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 16:48:49,936 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 16:48:49,936 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 16:48:49,942 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:48:49" (1/1) ... [2023-08-24 16:48:49,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:48:49" (1/1) ... [2023-08-24 16:48:49,953 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:48:49" (1/1) ... [2023-08-24 16:48:49,953 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:48:49" (1/1) ... [2023-08-24 16:48:49,962 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:48:49" (1/1) ... [2023-08-24 16:48:49,964 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:48:49" (1/1) ... [2023-08-24 16:48:49,965 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:48:49" (1/1) ... [2023-08-24 16:48:49,966 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:48:49" (1/1) ... [2023-08-24 16:48:49,967 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 16:48:49,968 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 16:48:49,968 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 16:48:49,968 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 16:48:49,969 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:48:49" (1/1) ... [2023-08-24 16:48:49,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 16:48:49,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:48:50,010 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 16:48:50,017 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 16:48:50,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 16:48:50,036 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 16:48:50,036 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 16:48:50,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 16:48:50,037 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 16:48:50,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 16:48:50,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 16:48:50,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 16:48:50,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 16:48:50,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 16:48:50,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 16:48:50,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 16:48:50,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 16:48:50,039 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 16:48:50,128 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 16:48:50,130 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 16:48:50,342 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 16:48:50,348 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 16:48:50,349 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 16:48:50,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:48:50 BoogieIcfgContainer [2023-08-24 16:48:50,350 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 16:48:50,352 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 16:48:50,352 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 16:48:50,354 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 16:48:50,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 04:48:49" (1/3) ... [2023-08-24 16:48:50,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9b74b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:48:50, skipping insertion in model container [2023-08-24 16:48:50,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:48:49" (2/3) ... [2023-08-24 16:48:50,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9b74b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:48:50, skipping insertion in model container [2023-08-24 16:48:50,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:48:50" (3/3) ... [2023-08-24 16:48:50,355 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2023-08-24 16:48:50,372 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 16:48:50,373 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 16:48:50,373 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 16:48:50,436 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 16:48:50,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 195 transitions, 406 flow [2023-08-24 16:48:50,550 INFO L124 PetriNetUnfolderBase]: 18/193 cut-off events. [2023-08-24 16:48:50,551 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:48:50,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 193 events. 18/193 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 300 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-24 16:48:50,559 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 195 transitions, 406 flow [2023-08-24 16:48:50,566 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 185 transitions, 382 flow [2023-08-24 16:48:50,569 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 16:48:50,577 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 185 transitions, 382 flow [2023-08-24 16:48:50,582 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 185 transitions, 382 flow [2023-08-24 16:48:50,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 185 transitions, 382 flow [2023-08-24 16:48:50,622 INFO L124 PetriNetUnfolderBase]: 18/185 cut-off events. [2023-08-24 16:48:50,622 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:48:50,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 185 events. 18/185 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 281 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-24 16:48:50,626 INFO L119 LiptonReduction]: Number of co-enabled transitions 4092 [2023-08-24 16:48:55,249 INFO L134 LiptonReduction]: Checked pairs total: 3895 [2023-08-24 16:48:55,249 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-08-24 16:48:55,258 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 16:48:55,263 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;@3d6aaa4a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 16:48:55,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 16:48:55,273 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 16:48:55,274 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-08-24 16:48:55,274 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:48:55,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:48:55,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:48:55,275 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 16:48:55,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:48:55,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1844223576, now seen corresponding path program 1 times [2023-08-24 16:48:55,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:48:55,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998346015] [2023-08-24 16:48:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:48:55,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:48:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:48:55,553 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 16:48:55,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:48:55,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998346015] [2023-08-24 16:48:55,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998346015] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:48:55,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:48:55,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 16:48:55,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621470992] [2023-08-24 16:48:55,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:48:55,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 16:48:55,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:48:55,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 16:48:55,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 16:48:55,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 413 [2023-08-24 16:48:55,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:55,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:48:55,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 413 [2023-08-24 16:48:55,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:48:55,620 INFO L124 PetriNetUnfolderBase]: 45/80 cut-off events. [2023-08-24 16:48:55,620 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 16:48:55,621 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 16:48:55,622 INFO L140 encePairwiseOnDemand]: 410/413 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-24 16:48:55,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-24 16:48:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 16:48:55,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 16:48:55,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2023-08-24 16:48:55,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132364810330912 [2023-08-24 16:48:55,633 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2023-08-24 16:48:55,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2023-08-24 16:48:55,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:48:55,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2023-08-24 16:48:55,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:55,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:55,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:55,643 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 512 transitions. [2023-08-24 16:48:55,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-24 16:48:55,645 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 16:48:55,646 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-24 16:48:55,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, 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 16:48:55,649 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-24 16:48:55,649 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-24 16:48:55,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:55,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:48:55,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:48:55,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 16:48:55,650 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 16:48:55,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:48:55,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1134865933, now seen corresponding path program 1 times [2023-08-24 16:48:55,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:48:55,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922191106] [2023-08-24 16:48:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:48:55,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:48:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:48:55,908 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 16:48:55,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:48:55,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922191106] [2023-08-24 16:48:55,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922191106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:48:55,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:48:55,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:48:55,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927401864] [2023-08-24 16:48:55,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:48:55,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:48:55,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:48:55,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:48:55,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:48:55,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:48:55,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:55,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:48:55,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:48:55,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:48:56,006 INFO L124 PetriNetUnfolderBase]: 72/135 cut-off events. [2023-08-24 16:48:56,006 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:48:56,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 363 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2023-08-24 16:48:56,009 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-08-24 16:48:56,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-08-24 16:48:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:48:56,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:48:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 805 transitions. [2023-08-24 16:48:56,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898305084745763 [2023-08-24 16:48:56,013 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 805 transitions. [2023-08-24 16:48:56,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 805 transitions. [2023-08-24 16:48:56,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:48:56,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 805 transitions. [2023-08-24 16:48:56,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,020 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,020 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 805 transitions. [2023-08-24 16:48:56,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-08-24 16:48:56,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 16:48:56,022 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-08-24 16:48:56,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, 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=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-08-24 16:48:56,022 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-24 16:48:56,023 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-08-24 16:48:56,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:48:56,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:48:56,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 16:48:56,024 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 16:48:56,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:48:56,029 INFO L85 PathProgramCache]: Analyzing trace with hash 496616907, now seen corresponding path program 2 times [2023-08-24 16:48:56,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:48:56,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600353758] [2023-08-24 16:48:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:48:56,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:48:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:48:56,337 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 16:48:56,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:48:56,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600353758] [2023-08-24 16:48:56,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600353758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:48:56,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:48:56,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:48:56,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356468287] [2023-08-24 16:48:56,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:48:56,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:48:56,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:48:56,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:48:56,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:48:56,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:48:56,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:48:56,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:48:56,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:48:56,440 INFO L124 PetriNetUnfolderBase]: 109/198 cut-off events. [2023-08-24 16:48:56,440 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-08-24 16:48:56,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 198 events. 109/198 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 593 event pairs, 24 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 560. Up to 87 conditions per place. [2023-08-24 16:48:56,442 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 40 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2023-08-24 16:48:56,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 52 transitions, 292 flow [2023-08-24 16:48:56,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 16:48:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 16:48:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 966 transitions. [2023-08-24 16:48:56,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898305084745763 [2023-08-24 16:48:56,444 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 966 transitions. [2023-08-24 16:48:56,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 966 transitions. [2023-08-24 16:48:56,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:48:56,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 966 transitions. [2023-08-24 16:48:56,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,450 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,450 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 6 states and 966 transitions. [2023-08-24 16:48:56,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 52 transitions, 292 flow [2023-08-24 16:48:56,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 52 transitions, 275 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-24 16:48:56,453 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 163 flow [2023-08-24 16:48:56,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-08-24 16:48:56,455 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-08-24 16:48:56,457 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 163 flow [2023-08-24 16:48:56,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:48:56,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:48:56,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 16:48:56,458 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 16:48:56,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:48:56,458 INFO L85 PathProgramCache]: Analyzing trace with hash -872709857, now seen corresponding path program 3 times [2023-08-24 16:48:56,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:48:56,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652461755] [2023-08-24 16:48:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:48:56,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:48:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:48:56,633 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 16:48:56,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:48:56,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652461755] [2023-08-24 16:48:56,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652461755] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:48:56,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:48:56,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:48:56,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614933104] [2023-08-24 16:48:56,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:48:56,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:48:56,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:48:56,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:48:56,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:48:56,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:48:56,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:48:56,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:48:56,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:48:56,733 INFO L124 PetriNetUnfolderBase]: 119/214 cut-off events. [2023-08-24 16:48:56,733 INFO L125 PetriNetUnfolderBase]: For 335/335 co-relation queries the response was YES. [2023-08-24 16:48:56,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 214 events. 119/214 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 695 event pairs, 28 based on Foata normal form. 4/187 useless extension candidates. Maximal degree in co-relation 778. Up to 111 conditions per place. [2023-08-24 16:48:56,735 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 40 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2023-08-24 16:48:56,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 376 flow [2023-08-24 16:48:56,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:48:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:48:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 806 transitions. [2023-08-24 16:48:56,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903147699757869 [2023-08-24 16:48:56,737 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 806 transitions. [2023-08-24 16:48:56,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 806 transitions. [2023-08-24 16:48:56,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:48:56,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 806 transitions. [2023-08-24 16:48:56,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,742 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,742 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 163 flow. Second operand 5 states and 806 transitions. [2023-08-24 16:48:56,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 376 flow [2023-08-24 16:48:56,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 362 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-24 16:48:56,745 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 255 flow [2023-08-24 16:48:56,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-24 16:48:56,745 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-08-24 16:48:56,745 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 255 flow [2023-08-24 16:48:56,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:48:56,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:48:56,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 16:48:56,746 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 16:48:56,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:48:56,747 INFO L85 PathProgramCache]: Analyzing trace with hash -4114561, now seen corresponding path program 4 times [2023-08-24 16:48:56,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:48:56,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421813376] [2023-08-24 16:48:56,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:48:56,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:48:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:48:56,855 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 16:48:56,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:48:56,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421813376] [2023-08-24 16:48:56,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421813376] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:48:56,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:48:56,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:48:56,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067983449] [2023-08-24 16:48:56,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:48:56,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:48:56,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:48:56,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:48:56,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:48:56,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:48:56,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:48:56,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:48:56,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:48:56,944 INFO L124 PetriNetUnfolderBase]: 115/210 cut-off events. [2023-08-24 16:48:56,944 INFO L125 PetriNetUnfolderBase]: For 629/629 co-relation queries the response was YES. [2023-08-24 16:48:56,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 210 events. 115/210 cut-off events. For 629/629 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 654 event pairs, 36 based on Foata normal form. 4/189 useless extension candidates. Maximal degree in co-relation 848. Up to 167 conditions per place. [2023-08-24 16:48:56,945 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 33 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2023-08-24 16:48:56,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 430 flow [2023-08-24 16:48:56,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:48:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:48:56,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 800 transitions. [2023-08-24 16:48:56,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.387409200968523 [2023-08-24 16:48:56,948 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 800 transitions. [2023-08-24 16:48:56,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 800 transitions. [2023-08-24 16:48:56,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:48:56,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 800 transitions. [2023-08-24 16:48:56,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,951 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,951 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 255 flow. Second operand 5 states and 800 transitions. [2023-08-24 16:48:56,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 430 flow [2023-08-24 16:48:56,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 414 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-24 16:48:56,954 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 347 flow [2023-08-24 16:48:56,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-24 16:48:56,955 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-08-24 16:48:56,955 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 347 flow [2023-08-24 16:48:56,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:56,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:48:56,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:48:56,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 16:48:56,966 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 16:48:56,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:48:56,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1316034913, now seen corresponding path program 5 times [2023-08-24 16:48:56,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:48:56,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473169918] [2023-08-24 16:48:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:48:56,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:48:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:48:57,100 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 16:48:57,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:48:57,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473169918] [2023-08-24 16:48:57,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473169918] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:48:57,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:48:57,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:48:57,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726237462] [2023-08-24 16:48:57,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:48:57,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:48:57,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:48:57,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:48:57,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:48:57,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:48:57,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:57,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:48:57,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:48:57,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:48:57,174 INFO L124 PetriNetUnfolderBase]: 116/213 cut-off events. [2023-08-24 16:48:57,174 INFO L125 PetriNetUnfolderBase]: For 648/648 co-relation queries the response was YES. [2023-08-24 16:48:57,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 213 events. 116/213 cut-off events. For 648/648 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 694 event pairs, 24 based on Foata normal form. 2/190 useless extension candidates. Maximal degree in co-relation 920. Up to 113 conditions per place. [2023-08-24 16:48:57,175 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 41 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2023-08-24 16:48:57,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 503 flow [2023-08-24 16:48:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:48:57,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:48:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 804 transitions. [2023-08-24 16:48:57,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3893462469733656 [2023-08-24 16:48:57,177 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 804 transitions. [2023-08-24 16:48:57,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 804 transitions. [2023-08-24 16:48:57,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:48:57,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 804 transitions. [2023-08-24 16:48:57,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:57,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:57,181 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:57,181 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 347 flow. Second operand 5 states and 804 transitions. [2023-08-24 16:48:57,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 503 flow [2023-08-24 16:48:57,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 460 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-24 16:48:57,184 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 344 flow [2023-08-24 16:48:57,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-08-24 16:48:57,185 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-08-24 16:48:57,185 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 344 flow [2023-08-24 16:48:57,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:57,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:48:57,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:48:57,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 16:48:57,186 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 16:48:57,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:48:57,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2043138631, now seen corresponding path program 6 times [2023-08-24 16:48:57,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:48:57,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345801132] [2023-08-24 16:48:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:48:57,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:48:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:48:57,309 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 16:48:57,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:48:57,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345801132] [2023-08-24 16:48:57,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345801132] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:48:57,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:48:57,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:48:57,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890619627] [2023-08-24 16:48:57,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:48:57,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:48:57,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:48:57,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:48:57,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:48:57,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:48:57,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:57,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:48:57,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:48:57,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:48:57,384 INFO L124 PetriNetUnfolderBase]: 115/206 cut-off events. [2023-08-24 16:48:57,384 INFO L125 PetriNetUnfolderBase]: For 736/736 co-relation queries the response was YES. [2023-08-24 16:48:57,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 206 events. 115/206 cut-off events. For 736/736 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 643 event pairs, 35 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 884. Up to 160 conditions per place. [2023-08-24 16:48:57,385 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 34 selfloop transitions, 18 changer transitions 0/52 dead transitions. [2023-08-24 16:48:57,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 472 flow [2023-08-24 16:48:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:48:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:48:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 800 transitions. [2023-08-24 16:48:57,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.387409200968523 [2023-08-24 16:48:57,387 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 800 transitions. [2023-08-24 16:48:57,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 800 transitions. [2023-08-24 16:48:57,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:48:57,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 800 transitions. [2023-08-24 16:48:57,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:57,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:57,391 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:57,391 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 344 flow. Second operand 5 states and 800 transitions. [2023-08-24 16:48:57,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 472 flow [2023-08-24 16:48:57,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 438 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 16:48:57,394 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 350 flow [2023-08-24 16:48:57,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-24 16:48:57,395 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-08-24 16:48:57,395 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 350 flow [2023-08-24 16:48:57,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:48:57,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:48:57,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:48:57,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 16:48:57,396 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 16:48:57,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:48:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash -995119352, now seen corresponding path program 1 times [2023-08-24 16:48:57,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:48:57,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336449481] [2023-08-24 16:48:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:48:57,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:48:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:48:57,600 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 16:48:57,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:48:57,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336449481] [2023-08-24 16:48:57,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336449481] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:48:57,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869603649] [2023-08-24 16:48:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:48:57,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:48:57,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:48:57,608 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 16:48:57,686 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 16:48:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:48:57,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 16:48:57,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:48:57,814 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 16:48:57,849 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 16:48:57,874 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 16:48:58,323 INFO L322 Elim1Store]: treesize reduction 78, result has 25.7 percent of original size [2023-08-24 16:48:58,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 632 treesize of output 319 [2023-08-24 16:48:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:48:58,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:48:59,045 WARN L839 $PredicateComparison]: unable to prove that (forall ((~x2~0 Int) (v_ArrVal_137 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_137) c_~f~0.base))) (let ((.cse1 (select .cse2 (+ c_~f~0.offset (* ~x2~0 4))))) (let ((.cse0 (select .cse2 (+ (* 4 .cse1) c_~f~0.offset)))) (or (< .cse0 0) (<= c_~size~0 .cse0) (<= c_~size~0 .cse1) (= (select .cse2 (+ (* .cse0 4) c_~f~0.offset)) c_~x1~0) (< .cse1 0)))))) is different from false [2023-08-24 16:49:00,400 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:49:00,401 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 250 treesize of output 154 [2023-08-24 16:49:00,421 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:49:00,422 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 934 treesize of output 838 [2023-08-24 16:49:00,462 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:49:00,462 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 170 [2023-08-24 16:49:00,500 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:49:00,501 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 263 treesize of output 165 [2023-08-24 16:49:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:49:01,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869603649] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:49:01,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:49:01,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-24 16:49:01,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003116360] [2023-08-24 16:49:01,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:49:01,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:49:01,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:49:01,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:49:01,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=221, Unknown=1, NotChecked=30, Total=306 [2023-08-24 16:49:01,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 413 [2023-08-24 16:49:01,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 350 flow. Second operand has 18 states, 18 states have (on average 81.66666666666667) internal successors, (1470), 18 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:49:01,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:49:01,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 413 [2023-08-24 16:49:01,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:49:03,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:49:06,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:49:08,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:49:10,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:49:12,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:49:16,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:49:18,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:49:20,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:49:22,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:49:24,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:49:26,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:49:26,721 INFO L124 PetriNetUnfolderBase]: 351/612 cut-off events. [2023-08-24 16:49:26,721 INFO L125 PetriNetUnfolderBase]: For 1833/1833 co-relation queries the response was YES. [2023-08-24 16:49:26,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2568 conditions, 612 events. 351/612 cut-off events. For 1833/1833 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2592 event pairs, 24 based on Foata normal form. 4/510 useless extension candidates. Maximal degree in co-relation 1991. Up to 209 conditions per place. [2023-08-24 16:49:26,724 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 73 selfloop transitions, 40 changer transitions 71/184 dead transitions. [2023-08-24 16:49:26,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 184 transitions, 1549 flow [2023-08-24 16:49:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 16:49:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 16:49:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1889 transitions. [2023-08-24 16:49:26,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20790226722430113 [2023-08-24 16:49:26,729 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1889 transitions. [2023-08-24 16:49:26,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1889 transitions. [2023-08-24 16:49:26,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:49:26,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1889 transitions. [2023-08-24 16:49:26,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 85.86363636363636) internal successors, (1889), 22 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:49:26,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 413.0) internal successors, (9499), 23 states have internal predecessors, (9499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:49:26,741 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 413.0) internal successors, (9499), 23 states have internal predecessors, (9499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:49:26,742 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 350 flow. Second operand 22 states and 1889 transitions. [2023-08-24 16:49:26,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 184 transitions, 1549 flow [2023-08-24 16:49:26,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 184 transitions, 1477 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 16:49:26,748 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 629 flow [2023-08-24 16:49:26,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=629, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2023-08-24 16:49:26,748 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 60 predicate places. [2023-08-24 16:49:26,749 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 629 flow [2023-08-24 16:49:26,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 81.66666666666667) internal successors, (1470), 18 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:49:26,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:49:26,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:49:26,774 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 16:49:26,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:49:26,950 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 16:49:26,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:49:26,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1616738483, now seen corresponding path program 1 times [2023-08-24 16:49:26,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:49:26,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970353066] [2023-08-24 16:49:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:49:26,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:49:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:49:27,265 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 16:49:27,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:49:27,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970353066] [2023-08-24 16:49:27,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970353066] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:49:27,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871802292] [2023-08-24 16:49:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:49:27,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:49:27,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:49:27,277 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 16:49:27,278 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 16:49:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:49:27,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 16:49:27,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:49:27,386 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 16:49:27,423 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 16:49:27,481 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 16:49:27,699 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 16:49:27,700 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 208 [2023-08-24 16:49:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:49:27,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:49:28,876 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:49:28,877 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 140 treesize of output 92 [2023-08-24 16:49:28,889 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:49:28,889 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 254 treesize of output 254 [2023-08-24 16:49:28,922 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:49:28,922 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 214 treesize of output 194 [2023-08-24 16:49:28,948 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:49:28,949 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 91 treesize of output 101 [2023-08-24 16:49:29,269 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 16:49:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:49:29,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871802292] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:49:29,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:49:29,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-24 16:49:29,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509621201] [2023-08-24 16:49:29,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:49:29,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 16:49:29,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:49:29,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 16:49:29,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=370, Unknown=2, NotChecked=0, Total=462 [2023-08-24 16:49:29,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 16:49:29,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 629 flow. Second operand has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:49:29,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:49:29,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 16:49:29,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:49:31,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:49:44,574 WARN L234 SmtUtils]: Spent 12.22s on a formula simplification. DAG size of input: 65 DAG size of output: 60 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:49:58,373 WARN L234 SmtUtils]: Spent 12.25s on a formula simplification. DAG size of input: 69 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:50:10,950 WARN L234 SmtUtils]: Spent 12.48s on a formula simplification. DAG size of input: 96 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:50:17,638 WARN L234 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 65 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:50:20,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:50:21,652 INFO L124 PetriNetUnfolderBase]: 520/975 cut-off events. [2023-08-24 16:50:21,653 INFO L125 PetriNetUnfolderBase]: For 3204/3204 co-relation queries the response was YES. [2023-08-24 16:50:21,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4148 conditions, 975 events. 520/975 cut-off events. For 3204/3204 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5032 event pairs, 25 based on Foata normal form. 17/819 useless extension candidates. Maximal degree in co-relation 4048. Up to 277 conditions per place. [2023-08-24 16:50:21,659 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 171 selfloop transitions, 108 changer transitions 48/327 dead transitions. [2023-08-24 16:50:21,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 327 transitions, 2620 flow [2023-08-24 16:50:21,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 16:50:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 16:50:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4646 transitions. [2023-08-24 16:50:21,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2556680607528065 [2023-08-24 16:50:21,673 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4646 transitions. [2023-08-24 16:50:21,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4646 transitions. [2023-08-24 16:50:21,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:50:21,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4646 transitions. [2023-08-24 16:50:21,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 105.5909090909091) internal successors, (4646), 44 states have internal predecessors, (4646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:50:21,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 413.0) internal successors, (18585), 45 states have internal predecessors, (18585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:50:21,725 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 413.0) internal successors, (18585), 45 states have internal predecessors, (18585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:50:21,725 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 629 flow. Second operand 44 states and 4646 transitions. [2023-08-24 16:50:21,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 327 transitions, 2620 flow [2023-08-24 16:50:21,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 327 transitions, 2226 flow, removed 134 selfloop flow, removed 11 redundant places. [2023-08-24 16:50:21,739 INFO L231 Difference]: Finished difference. Result has 131 places, 143 transitions, 1426 flow [2023-08-24 16:50:21,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1426, PETRI_PLACES=131, PETRI_TRANSITIONS=143} [2023-08-24 16:50:21,740 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 110 predicate places. [2023-08-24 16:50:21,740 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 143 transitions, 1426 flow [2023-08-24 16:50:21,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:50:21,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:50:21,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:50:21,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 16:50:21,955 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 16:50:21,956 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 16:50:21,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:50:21,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1938734729, now seen corresponding path program 2 times [2023-08-24 16:50:21,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:50:21,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674813151] [2023-08-24 16:50:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:50:21,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:50:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:50:22,099 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 16:50:22,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:50:22,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674813151] [2023-08-24 16:50:22,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674813151] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:50:22,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325248904] [2023-08-24 16:50:22,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:50:22,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:50:22,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:50:22,114 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 16:50:22,115 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 16:50:22,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:50:22,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:50:22,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 16:50:22,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:50:22,451 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 16:50:22,451 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 227 treesize of output 212 [2023-08-24 16:50:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:50:22,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:50:23,546 INFO L322 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-08-24 16:50:23,546 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 16:50:23,580 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-08-24 16:50:23,589 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 16:50:23,589 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-08-24 16:50:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:50:23,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325248904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:50:23,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:50:23,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-24 16:50:23,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211739762] [2023-08-24 16:50:23,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:50:23,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:50:23,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:50:23,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:50:23,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:50:23,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 413 [2023-08-24 16:50:23,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 143 transitions, 1426 flow. Second operand has 18 states, 18 states have (on average 108.66666666666667) internal successors, (1956), 18 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:50:23,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:50:23,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 413 [2023-08-24 16:50:23,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:50:24,351 INFO L124 PetriNetUnfolderBase]: 495/918 cut-off events. [2023-08-24 16:50:24,351 INFO L125 PetriNetUnfolderBase]: For 6278/6278 co-relation queries the response was YES. [2023-08-24 16:50:24,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4838 conditions, 918 events. 495/918 cut-off events. For 6278/6278 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4578 event pairs, 127 based on Foata normal form. 9/926 useless extension candidates. Maximal degree in co-relation 4707. Up to 680 conditions per place. [2023-08-24 16:50:24,357 INFO L140 encePairwiseOnDemand]: 403/413 looper letters, 133 selfloop transitions, 49 changer transitions 17/199 dead transitions. [2023-08-24 16:50:24,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 199 transitions, 2106 flow [2023-08-24 16:50:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 16:50:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 16:50:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2117 transitions. [2023-08-24 16:50:24,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2697846310691984 [2023-08-24 16:50:24,361 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2117 transitions. [2023-08-24 16:50:24,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2117 transitions. [2023-08-24 16:50:24,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:50:24,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2117 transitions. [2023-08-24 16:50:24,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 111.42105263157895) internal successors, (2117), 19 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:50:24,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 413.0) internal successors, (8260), 20 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:50:24,370 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 413.0) internal successors, (8260), 20 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:50:24,370 INFO L175 Difference]: Start difference. First operand has 131 places, 143 transitions, 1426 flow. Second operand 19 states and 2117 transitions. [2023-08-24 16:50:24,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 199 transitions, 2106 flow [2023-08-24 16:50:24,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 199 transitions, 1965 flow, removed 63 selfloop flow, removed 11 redundant places. [2023-08-24 16:50:24,388 INFO L231 Difference]: Finished difference. Result has 136 places, 146 transitions, 1466 flow [2023-08-24 16:50:24,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1466, PETRI_PLACES=136, PETRI_TRANSITIONS=146} [2023-08-24 16:50:24,389 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 115 predicate places. [2023-08-24 16:50:24,389 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 146 transitions, 1466 flow [2023-08-24 16:50:24,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.66666666666667) internal successors, (1956), 18 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:50:24,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:50:24,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:50:24,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 16:50:24,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:50:24,595 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 16:50:24,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:50:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1463182197, now seen corresponding path program 3 times [2023-08-24 16:50:24,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:50:24,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957204056] [2023-08-24 16:50:24,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:50:24,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:50:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:50:24,770 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 16:50:24,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:50:24,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957204056] [2023-08-24 16:50:24,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957204056] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:50:24,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481900903] [2023-08-24 16:50:24,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:50:24,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:50:24,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:50:24,771 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 16:50:24,773 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 16:50:24,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 16:50:24,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:50:24,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 16:50:24,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:50:24,904 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 16:50:24,939 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 16:50:25,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:50:25,020 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 16:50:25,213 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 16:50:25,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 208 [2023-08-24 16:50:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:50:25,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:50:26,293 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:50:26,293 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 137 treesize of output 89 [2023-08-24 16:50:26,308 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:50:26,308 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 388 treesize of output 348 [2023-08-24 16:50:26,323 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:50:26,323 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 208 treesize of output 180 [2023-08-24 16:50:26,373 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:50:26,373 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 97 treesize of output 101 [2023-08-24 16:50:26,703 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 16:50:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:50:26,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481900903] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:50:26,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:50:26,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-24 16:50:26,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927895959] [2023-08-24 16:50:26,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:50:26,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 16:50:26,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:50:26,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 16:50:26,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=383, Unknown=1, NotChecked=0, Total=462 [2023-08-24 16:50:26,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 16:50:26,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 146 transitions, 1466 flow. Second operand has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:50:26,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:50:26,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 16:50:26,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:50:37,436 WARN L234 SmtUtils]: Spent 10.16s on a formula simplification. DAG size of input: 47 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:50:48,195 WARN L234 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:51:04,131 WARN L234 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 86 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:51:05,005 INFO L124 PetriNetUnfolderBase]: 672/1212 cut-off events. [2023-08-24 16:51:05,006 INFO L125 PetriNetUnfolderBase]: For 6669/6669 co-relation queries the response was YES. [2023-08-24 16:51:05,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6082 conditions, 1212 events. 672/1212 cut-off events. For 6669/6669 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6330 event pairs, 69 based on Foata normal form. 18/1229 useless extension candidates. Maximal degree in co-relation 5975. Up to 332 conditions per place. [2023-08-24 16:51:05,018 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 118 selfloop transitions, 93 changer transitions 93/304 dead transitions. [2023-08-24 16:51:05,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 304 transitions, 3002 flow [2023-08-24 16:51:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 16:51:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 16:51:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3263 transitions. [2023-08-24 16:51:05,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25486214168554244 [2023-08-24 16:51:05,035 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3263 transitions. [2023-08-24 16:51:05,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3263 transitions. [2023-08-24 16:51:05,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:05,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3263 transitions. [2023-08-24 16:51:05,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 105.25806451612904) internal successors, (3263), 31 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:05,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 413.0) internal successors, (13216), 32 states have internal predecessors, (13216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:05,071 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 413.0) internal successors, (13216), 32 states have internal predecessors, (13216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:05,072 INFO L175 Difference]: Start difference. First operand has 136 places, 146 transitions, 1466 flow. Second operand 31 states and 3263 transitions. [2023-08-24 16:51:05,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 304 transitions, 3002 flow [2023-08-24 16:51:05,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 304 transitions, 2900 flow, removed 13 selfloop flow, removed 14 redundant places. [2023-08-24 16:51:05,122 INFO L231 Difference]: Finished difference. Result has 157 places, 134 transitions, 1553 flow [2023-08-24 16:51:05,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1553, PETRI_PLACES=157, PETRI_TRANSITIONS=134} [2023-08-24 16:51:05,123 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-08-24 16:51:05,123 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 134 transitions, 1553 flow [2023-08-24 16:51:05,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:05,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:51:05,123 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:51:05,130 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 16:51:05,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:05,329 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 16:51:05,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:51:05,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1631552755, now seen corresponding path program 4 times [2023-08-24 16:51:05,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:51:05,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134432499] [2023-08-24 16:51:05,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:51:05,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:51:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:51:06,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:51:06,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134432499] [2023-08-24 16:51:06,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134432499] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:51:06,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365564098] [2023-08-24 16:51:06,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:51:06,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:06,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:51:06,043 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 16:51:06,044 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 16:51:06,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:51:06,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:51:06,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-24 16:51:06,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:51:06,154 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 16:51:06,188 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 16:51:06,215 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 16:51:06,498 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 16:51:06,506 INFO L322 Elim1Store]: treesize reduction 15, result has 31.8 percent of original size [2023-08-24 16:51:06,507 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 16:51:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:51:06,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:51:07,987 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:51:07,987 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 140 treesize of output 92 [2023-08-24 16:51:08,008 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:51:08,008 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 540 treesize of output 500 [2023-08-24 16:51:08,039 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:51:08,039 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 94 treesize of output 104 [2023-08-24 16:51:08,071 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:51:08,071 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 121 treesize of output 101 [2023-08-24 16:51:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:51:08,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365564098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:51:08,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:51:08,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-24 16:51:08,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310992874] [2023-08-24 16:51:08,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:51:08,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 16:51:08,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:51:08,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 16:51:08,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=629, Unknown=7, NotChecked=0, Total=756 [2023-08-24 16:51:08,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 16:51:08,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 134 transitions, 1553 flow. Second operand has 28 states, 28 states have (on average 100.67857142857143) internal successors, (2819), 28 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:08,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:51:08,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 16:51:08,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:51:09,413 INFO L124 PetriNetUnfolderBase]: 378/702 cut-off events. [2023-08-24 16:51:09,413 INFO L125 PetriNetUnfolderBase]: For 4672/4672 co-relation queries the response was YES. [2023-08-24 16:51:09,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 702 events. 378/702 cut-off events. For 4672/4672 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3223 event pairs, 63 based on Foata normal form. 2/703 useless extension candidates. Maximal degree in co-relation 3801. Up to 592 conditions per place. [2023-08-24 16:51:09,418 INFO L140 encePairwiseOnDemand]: 404/413 looper letters, 114 selfloop transitions, 16 changer transitions 27/157 dead transitions. [2023-08-24 16:51:09,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 157 transitions, 1975 flow [2023-08-24 16:51:09,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 16:51:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 16:51:09,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1244 transitions. [2023-08-24 16:51:09,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2510088781275222 [2023-08-24 16:51:09,420 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1244 transitions. [2023-08-24 16:51:09,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1244 transitions. [2023-08-24 16:51:09,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:09,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1244 transitions. [2023-08-24 16:51:09,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 103.66666666666667) internal successors, (1244), 12 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:09,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 413.0) internal successors, (5369), 13 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:09,425 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 413.0) internal successors, (5369), 13 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:09,426 INFO L175 Difference]: Start difference. First operand has 157 places, 134 transitions, 1553 flow. Second operand 12 states and 1244 transitions. [2023-08-24 16:51:09,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 157 transitions, 1975 flow [2023-08-24 16:51:09,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 157 transitions, 1778 flow, removed 43 selfloop flow, removed 31 redundant places. [2023-08-24 16:51:09,443 INFO L231 Difference]: Finished difference. Result has 124 places, 125 transitions, 1318 flow [2023-08-24 16:51:09,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1318, PETRI_PLACES=124, PETRI_TRANSITIONS=125} [2023-08-24 16:51:09,444 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 103 predicate places. [2023-08-24 16:51:09,444 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 125 transitions, 1318 flow [2023-08-24 16:51:09,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 100.67857142857143) internal successors, (2819), 28 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:09,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:51:09,445 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:51:09,464 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 16:51:09,650 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,SelfDestructingSolverStorable11 [2023-08-24 16:51:09,650 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 16:51:09,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:51:09,653 INFO L85 PathProgramCache]: Analyzing trace with hash -620352544, now seen corresponding path program 5 times [2023-08-24 16:51:09,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:51:09,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506042035] [2023-08-24 16:51:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:51:09,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:51:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:09,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:51:09,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506042035] [2023-08-24 16:51:09,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506042035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:51:09,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752311265] [2023-08-24 16:51:09,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:51:09,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:09,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:51:09,898 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 16:51:09,899 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 16:51:09,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:51:09,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:51:09,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 16:51:09,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:51:10,097 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-08-24 16:51:10,113 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 84 [2023-08-24 16:51:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:10,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:51:10,279 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-24 16:51:10,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-24 16:51:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:10,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752311265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:51:10,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:51:10,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 16:51:10,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297793869] [2023-08-24 16:51:10,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:51:10,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 16:51:10,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:51:10,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 16:51:10,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-24 16:51:10,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:51:10,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 125 transitions, 1318 flow. Second operand has 13 states, 13 states have (on average 155.07692307692307) internal successors, (2016), 13 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:10,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:51:10,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:51:10,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:51:10,981 INFO L124 PetriNetUnfolderBase]: 531/942 cut-off events. [2023-08-24 16:51:10,981 INFO L125 PetriNetUnfolderBase]: For 4603/4603 co-relation queries the response was YES. [2023-08-24 16:51:10,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4829 conditions, 942 events. 531/942 cut-off events. For 4603/4603 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4513 event pairs, 69 based on Foata normal form. 6/947 useless extension candidates. Maximal degree in co-relation 4768. Up to 271 conditions per place. [2023-08-24 16:51:10,988 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 147 selfloop transitions, 75 changer transitions 0/222 dead transitions. [2023-08-24 16:51:10,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 222 transitions, 2349 flow [2023-08-24 16:51:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 16:51:10,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 16:51:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2417 transitions. [2023-08-24 16:51:10,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901533494753834 [2023-08-24 16:51:10,991 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2417 transitions. [2023-08-24 16:51:10,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2417 transitions. [2023-08-24 16:51:10,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:10,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2417 transitions. [2023-08-24 16:51:11,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 161.13333333333333) internal successors, (2417), 15 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:11,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:11,009 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:11,009 INFO L175 Difference]: Start difference. First operand has 124 places, 125 transitions, 1318 flow. Second operand 15 states and 2417 transitions. [2023-08-24 16:51:11,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 222 transitions, 2349 flow [2023-08-24 16:51:11,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 222 transitions, 2272 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-08-24 16:51:11,026 INFO L231 Difference]: Finished difference. Result has 123 places, 147 transitions, 1715 flow [2023-08-24 16:51:11,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1715, PETRI_PLACES=123, PETRI_TRANSITIONS=147} [2023-08-24 16:51:11,027 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2023-08-24 16:51:11,027 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 147 transitions, 1715 flow [2023-08-24 16:51:11,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.07692307692307) internal successors, (2016), 13 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:11,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:51:11,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:51:11,032 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 16:51:11,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:11,233 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 16:51:11,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:51:11,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1077253207, now seen corresponding path program 2 times [2023-08-24 16:51:11,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:51:11,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507444292] [2023-08-24 16:51:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:51:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:51:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:11,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:51:11,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507444292] [2023-08-24 16:51:11,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507444292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:51:11,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792015001] [2023-08-24 16:51:11,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:51:11,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:11,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:51:11,377 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 16:51:11,378 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 16:51:11,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:51:11,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:51:11,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 16:51:11,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:51:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:11,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:51:11,721 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 16:51:11,799 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 16:51:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:11,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792015001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:51:11,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:51:11,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 16:51:11,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074827056] [2023-08-24 16:51:11,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:51:11,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 16:51:11,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:51:11,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 16:51:11,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-08-24 16:51:11,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:51:11,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 147 transitions, 1715 flow. Second operand has 11 states, 11 states have (on average 155.27272727272728) internal successors, (1708), 11 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:11,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:51:11,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:51:11,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:51:12,354 INFO L124 PetriNetUnfolderBase]: 540/963 cut-off events. [2023-08-24 16:51:12,354 INFO L125 PetriNetUnfolderBase]: For 5795/5795 co-relation queries the response was YES. [2023-08-24 16:51:12,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5298 conditions, 963 events. 540/963 cut-off events. For 5795/5795 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4711 event pairs, 91 based on Foata normal form. 12/974 useless extension candidates. Maximal degree in co-relation 5236. Up to 354 conditions per place. [2023-08-24 16:51:12,360 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 126 selfloop transitions, 84 changer transitions 0/210 dead transitions. [2023-08-24 16:51:12,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 210 transitions, 2436 flow [2023-08-24 16:51:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 16:51:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 16:51:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2543 transitions. [2023-08-24 16:51:12,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3848365617433414 [2023-08-24 16:51:12,363 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2543 transitions. [2023-08-24 16:51:12,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2543 transitions. [2023-08-24 16:51:12,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:12,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2543 transitions. [2023-08-24 16:51:12,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 158.9375) internal successors, (2543), 16 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:12,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 413.0) internal successors, (7021), 17 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:12,371 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 413.0) internal successors, (7021), 17 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:12,371 INFO L175 Difference]: Start difference. First operand has 123 places, 147 transitions, 1715 flow. Second operand 16 states and 2543 transitions. [2023-08-24 16:51:12,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 210 transitions, 2436 flow [2023-08-24 16:51:12,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 210 transitions, 2353 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-08-24 16:51:12,393 INFO L231 Difference]: Finished difference. Result has 137 places, 154 transitions, 1885 flow [2023-08-24 16:51:12,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1885, PETRI_PLACES=137, PETRI_TRANSITIONS=154} [2023-08-24 16:51:12,393 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 116 predicate places. [2023-08-24 16:51:12,394 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 154 transitions, 1885 flow [2023-08-24 16:51:12,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 155.27272727272728) internal successors, (1708), 11 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:12,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:51:12,394 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:51:12,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-24 16:51:12,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:12,600 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 16:51:12,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:51:12,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1430700406, now seen corresponding path program 6 times [2023-08-24 16:51:12,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:51:12,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719716057] [2023-08-24 16:51:12,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:51:12,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:51:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:12,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:51:12,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719716057] [2023-08-24 16:51:12,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719716057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:51:12,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927910585] [2023-08-24 16:51:12,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:51:12,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:12,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:51:12,777 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 16:51:12,780 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 16:51:12,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 16:51:12,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:51:12,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 16:51:12,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:51:13,091 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:51:13,092 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 227 treesize of output 217 [2023-08-24 16:51:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:13,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:51:14,029 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:51:14,029 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 216 treesize of output 185 [2023-08-24 16:51:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:14,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927910585] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:51:14,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:51:14,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-08-24 16:51:14,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886096052] [2023-08-24 16:51:14,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:51:14,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:51:14,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:51:14,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:51:14,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:51:14,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 413 [2023-08-24 16:51:14,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 154 transitions, 1885 flow. Second operand has 17 states, 17 states have (on average 122.17647058823529) internal successors, (2077), 17 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:14,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:51:14,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 413 [2023-08-24 16:51:14,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:51:17,369 INFO L124 PetriNetUnfolderBase]: 641/1174 cut-off events. [2023-08-24 16:51:17,369 INFO L125 PetriNetUnfolderBase]: For 7523/7523 co-relation queries the response was YES. [2023-08-24 16:51:17,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6726 conditions, 1174 events. 641/1174 cut-off events. For 7523/7523 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6231 event pairs, 88 based on Foata normal form. 8/1181 useless extension candidates. Maximal degree in co-relation 6660. Up to 793 conditions per place. [2023-08-24 16:51:17,378 INFO L140 encePairwiseOnDemand]: 405/413 looper letters, 181 selfloop transitions, 62 changer transitions 16/259 dead transitions. [2023-08-24 16:51:17,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 259 transitions, 3084 flow [2023-08-24 16:51:17,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 16:51:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 16:51:17,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2531 transitions. [2023-08-24 16:51:17,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3064164648910412 [2023-08-24 16:51:17,380 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2531 transitions. [2023-08-24 16:51:17,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2531 transitions. [2023-08-24 16:51:17,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:17,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2531 transitions. [2023-08-24 16:51:17,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 126.55) internal successors, (2531), 20 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:17,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:17,387 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:17,387 INFO L175 Difference]: Start difference. First operand has 137 places, 154 transitions, 1885 flow. Second operand 20 states and 2531 transitions. [2023-08-24 16:51:17,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 259 transitions, 3084 flow [2023-08-24 16:51:17,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 259 transitions, 2981 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-08-24 16:51:17,416 INFO L231 Difference]: Finished difference. Result has 163 places, 180 transitions, 2330 flow [2023-08-24 16:51:17,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2330, PETRI_PLACES=163, PETRI_TRANSITIONS=180} [2023-08-24 16:51:17,417 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-08-24 16:51:17,417 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 180 transitions, 2330 flow [2023-08-24 16:51:17,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 122.17647058823529) internal successors, (2077), 17 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:17,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:51:17,417 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:51:17,433 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 16:51:17,633 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,SelfDestructingSolverStorable14 [2023-08-24 16:51:17,634 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 16:51:17,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:51:17,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2101387973, now seen corresponding path program 3 times [2023-08-24 16:51:17,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:51:17,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995990294] [2023-08-24 16:51:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:51:17,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:51:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:17,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:51:17,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995990294] [2023-08-24 16:51:17,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995990294] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:51:17,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841780985] [2023-08-24 16:51:17,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:51:17,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:17,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:51:17,847 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 16:51:17,856 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 16:51:17,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 16:51:17,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:51:17,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 16:51:17,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:51:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:18,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:51:18,182 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-24 16:51:18,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-24 16:51:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:18,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841780985] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:51:18,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:51:18,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-08-24 16:51:18,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716653821] [2023-08-24 16:51:18,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:51:18,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 16:51:18,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:51:18,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 16:51:18,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-24 16:51:18,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:51:18,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 180 transitions, 2330 flow. Second operand has 10 states, 10 states have (on average 155.3) internal successors, (1553), 10 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:18,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:51:18,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:51:18,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:51:19,141 INFO L124 PetriNetUnfolderBase]: 662/1203 cut-off events. [2023-08-24 16:51:19,141 INFO L125 PetriNetUnfolderBase]: For 10362/10362 co-relation queries the response was YES. [2023-08-24 16:51:19,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7414 conditions, 1203 events. 662/1203 cut-off events. For 10362/10362 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6433 event pairs, 116 based on Foata normal form. 24/1226 useless extension candidates. Maximal degree in co-relation 7334. Up to 414 conditions per place. [2023-08-24 16:51:19,151 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 142 selfloop transitions, 111 changer transitions 0/253 dead transitions. [2023-08-24 16:51:19,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 253 transitions, 3232 flow [2023-08-24 16:51:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 16:51:19,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 16:51:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2717 transitions. [2023-08-24 16:51:19,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38698191140863125 [2023-08-24 16:51:19,154 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2717 transitions. [2023-08-24 16:51:19,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2717 transitions. [2023-08-24 16:51:19,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:19,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2717 transitions. [2023-08-24 16:51:19,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 159.8235294117647) internal successors, (2717), 17 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:19,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 413.0) internal successors, (7434), 18 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:19,161 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 413.0) internal successors, (7434), 18 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:19,161 INFO L175 Difference]: Start difference. First operand has 163 places, 180 transitions, 2330 flow. Second operand 17 states and 2717 transitions. [2023-08-24 16:51:19,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 253 transitions, 3232 flow [2023-08-24 16:51:19,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 253 transitions, 3099 flow, removed 39 selfloop flow, removed 9 redundant places. [2023-08-24 16:51:19,233 INFO L231 Difference]: Finished difference. Result has 172 places, 191 transitions, 2632 flow [2023-08-24 16:51:19,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2632, PETRI_PLACES=172, PETRI_TRANSITIONS=191} [2023-08-24 16:51:19,234 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 151 predicate places. [2023-08-24 16:51:19,234 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 191 transitions, 2632 flow [2023-08-24 16:51:19,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.3) internal successors, (1553), 10 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:19,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:51:19,235 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:51:19,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-24 16:51:19,440 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,SelfDestructingSolverStorable15 [2023-08-24 16:51:19,440 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 16:51:19,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:51:19,440 INFO L85 PathProgramCache]: Analyzing trace with hash -2016599651, now seen corresponding path program 4 times [2023-08-24 16:51:19,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:51:19,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348711801] [2023-08-24 16:51:19,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:51:19,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:51:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:19,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:51:19,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348711801] [2023-08-24 16:51:19,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348711801] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:51:19,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020996354] [2023-08-24 16:51:19,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:51:19,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:19,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:51:19,622 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 16:51:19,640 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 16:51:19,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:51:19,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:51:19,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 16:51:19,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:51:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:19,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:51:19,952 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 16:51:20,062 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 16:51:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:20,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020996354] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:51:20,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:51:20,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 16:51:20,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910269370] [2023-08-24 16:51:20,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:51:20,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 16:51:20,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:51:20,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 16:51:20,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-24 16:51:20,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:51:20,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 191 transitions, 2632 flow. Second operand has 12 states, 12 states have (on average 155.33333333333334) internal successors, (1864), 12 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:20,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:51:20,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:51:20,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:51:21,059 INFO L124 PetriNetUnfolderBase]: 714/1309 cut-off events. [2023-08-24 16:51:21,059 INFO L125 PetriNetUnfolderBase]: For 12688/12688 co-relation queries the response was YES. [2023-08-24 16:51:21,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8452 conditions, 1309 events. 714/1309 cut-off events. For 12688/12688 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7198 event pairs, 170 based on Foata normal form. 28/1336 useless extension candidates. Maximal degree in co-relation 8370. Up to 675 conditions per place. [2023-08-24 16:51:21,068 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 176 selfloop transitions, 108 changer transitions 0/284 dead transitions. [2023-08-24 16:51:21,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 284 transitions, 3827 flow [2023-08-24 16:51:21,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 16:51:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 16:51:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2883 transitions. [2023-08-24 16:51:21,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878127522195319 [2023-08-24 16:51:21,096 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2883 transitions. [2023-08-24 16:51:21,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2883 transitions. [2023-08-24 16:51:21,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:21,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2883 transitions. [2023-08-24 16:51:21,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 160.16666666666666) internal successors, (2883), 18 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:21,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 413.0) internal successors, (7847), 19 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:21,103 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 413.0) internal successors, (7847), 19 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:21,103 INFO L175 Difference]: Start difference. First operand has 172 places, 191 transitions, 2632 flow. Second operand 18 states and 2883 transitions. [2023-08-24 16:51:21,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 284 transitions, 3827 flow [2023-08-24 16:51:21,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 284 transitions, 3683 flow, removed 37 selfloop flow, removed 6 redundant places. [2023-08-24 16:51:21,146 INFO L231 Difference]: Finished difference. Result has 190 places, 216 transitions, 3203 flow [2023-08-24 16:51:21,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2448, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3203, PETRI_PLACES=190, PETRI_TRANSITIONS=216} [2023-08-24 16:51:21,147 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 169 predicate places. [2023-08-24 16:51:21,147 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 216 transitions, 3203 flow [2023-08-24 16:51:21,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.33333333333334) internal successors, (1864), 12 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:21,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:51:21,147 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:51:21,152 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 16:51:21,351 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,SelfDestructingSolverStorable16 [2023-08-24 16:51:21,352 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 16:51:21,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:51:21,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1897565900, now seen corresponding path program 7 times [2023-08-24 16:51:21,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:51:21,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706866815] [2023-08-24 16:51:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:51:21,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:51:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:21,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:51:21,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706866815] [2023-08-24 16:51:21,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706866815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:51:21,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058990533] [2023-08-24 16:51:21,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:51:21,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:21,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:51:21,564 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 16:51:21,566 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 16:51:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:21,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 16:51:21,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:51:21,932 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 16:51:21,932 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 205 [2023-08-24 16:51:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:21,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:51:22,958 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:51:22,958 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 216 treesize of output 185 [2023-08-24 16:51:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:23,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058990533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:51:23,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:51:23,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-08-24 16:51:23,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93108070] [2023-08-24 16:51:23,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:51:23,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:51:23,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:51:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:51:23,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:51:23,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 413 [2023-08-24 16:51:23,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 216 transitions, 3203 flow. Second operand has 17 states, 17 states have (on average 122.29411764705883) internal successors, (2079), 17 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:23,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:51:23,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 413 [2023-08-24 16:51:23,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:51:29,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:51:29,725 INFO L124 PetriNetUnfolderBase]: 759/1447 cut-off events. [2023-08-24 16:51:29,725 INFO L125 PetriNetUnfolderBase]: For 13585/13585 co-relation queries the response was YES. [2023-08-24 16:51:29,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9402 conditions, 1447 events. 759/1447 cut-off events. For 13585/13585 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8464 event pairs, 41 based on Foata normal form. 8/1454 useless extension candidates. Maximal degree in co-relation 9315. Up to 705 conditions per place. [2023-08-24 16:51:29,737 INFO L140 encePairwiseOnDemand]: 405/413 looper letters, 190 selfloop transitions, 123 changer transitions 15/328 dead transitions. [2023-08-24 16:51:29,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 328 transitions, 4680 flow [2023-08-24 16:51:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 16:51:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 16:51:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2907 transitions. [2023-08-24 16:51:29,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30603221391725444 [2023-08-24 16:51:29,741 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2907 transitions. [2023-08-24 16:51:29,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2907 transitions. [2023-08-24 16:51:29,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:29,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2907 transitions. [2023-08-24 16:51:29,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 126.3913043478261) internal successors, (2907), 23 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:29,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 413.0) internal successors, (9912), 24 states have internal predecessors, (9912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:29,748 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 413.0) internal successors, (9912), 24 states have internal predecessors, (9912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:29,748 INFO L175 Difference]: Start difference. First operand has 190 places, 216 transitions, 3203 flow. Second operand 23 states and 2907 transitions. [2023-08-24 16:51:29,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 328 transitions, 4680 flow [2023-08-24 16:51:29,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 328 transitions, 4437 flow, removed 101 selfloop flow, removed 7 redundant places. [2023-08-24 16:51:29,821 INFO L231 Difference]: Finished difference. Result has 215 places, 243 transitions, 3703 flow [2023-08-24 16:51:29,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3703, PETRI_PLACES=215, PETRI_TRANSITIONS=243} [2023-08-24 16:51:29,822 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 194 predicate places. [2023-08-24 16:51:29,822 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 243 transitions, 3703 flow [2023-08-24 16:51:29,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 122.29411764705883) internal successors, (2079), 17 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:29,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:51:29,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:51:29,830 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 16:51:30,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 16:51:30,028 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 16:51:30,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:51:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1833892866, now seen corresponding path program 8 times [2023-08-24 16:51:30,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:51:30,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408227287] [2023-08-24 16:51:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:51:30,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:51:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:30,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:51:30,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408227287] [2023-08-24 16:51:30,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408227287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:51:30,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926810581] [2023-08-24 16:51:30,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:51:30,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:30,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:51:30,193 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 16:51:30,249 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 16:51:30,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:51:30,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:51:30,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 16:51:30,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:51:30,558 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:51:30,559 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 28 treesize of output 23 [2023-08-24 16:51:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:30,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:51:30,859 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:51:30,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 320 treesize of output 312 [2023-08-24 16:51:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:31,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926810581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:51:31,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:51:31,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-08-24 16:51:31,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406760306] [2023-08-24 16:51:31,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:51:31,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:51:31,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:51:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:51:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:51:31,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 413 [2023-08-24 16:51:31,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 243 transitions, 3703 flow. Second operand has 17 states, 17 states have (on average 122.17647058823529) internal successors, (2077), 17 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:31,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:51:31,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 413 [2023-08-24 16:51:31,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:51:32,845 INFO L124 PetriNetUnfolderBase]: 838/1660 cut-off events. [2023-08-24 16:51:32,845 INFO L125 PetriNetUnfolderBase]: For 16147/16147 co-relation queries the response was YES. [2023-08-24 16:51:32,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11034 conditions, 1660 events. 838/1660 cut-off events. For 16147/16147 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10423 event pairs, 7 based on Foata normal form. 5/1664 useless extension candidates. Maximal degree in co-relation 10937. Up to 644 conditions per place. [2023-08-24 16:51:32,866 INFO L140 encePairwiseOnDemand]: 404/413 looper letters, 162 selfloop transitions, 186 changer transitions 12/360 dead transitions. [2023-08-24 16:51:32,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 360 transitions, 5524 flow [2023-08-24 16:51:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 16:51:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 16:51:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2647 transitions. [2023-08-24 16:51:32,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30520004612014295 [2023-08-24 16:51:32,869 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2647 transitions. [2023-08-24 16:51:32,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2647 transitions. [2023-08-24 16:51:32,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:32,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2647 transitions. [2023-08-24 16:51:32,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 126.04761904761905) internal successors, (2647), 21 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:32,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 413.0) internal successors, (9086), 22 states have internal predecessors, (9086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:32,875 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 413.0) internal successors, (9086), 22 states have internal predecessors, (9086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:32,875 INFO L175 Difference]: Start difference. First operand has 215 places, 243 transitions, 3703 flow. Second operand 21 states and 2647 transitions. [2023-08-24 16:51:32,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 360 transitions, 5524 flow [2023-08-24 16:51:32,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 360 transitions, 5147 flow, removed 101 selfloop flow, removed 11 redundant places. [2023-08-24 16:51:32,949 INFO L231 Difference]: Finished difference. Result has 228 places, 288 transitions, 4506 flow [2023-08-24 16:51:32,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4506, PETRI_PLACES=228, PETRI_TRANSITIONS=288} [2023-08-24 16:51:32,949 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 207 predicate places. [2023-08-24 16:51:32,949 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 288 transitions, 4506 flow [2023-08-24 16:51:32,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 122.17647058823529) internal successors, (2077), 17 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:32,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:51:32,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:51:32,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-24 16:51:33,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:33,154 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 16:51:33,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:51:33,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1038064080, now seen corresponding path program 9 times [2023-08-24 16:51:33,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:51:33,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501200633] [2023-08-24 16:51:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:51:33,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:51:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:33,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:51:33,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501200633] [2023-08-24 16:51:33,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501200633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:51:33,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611995236] [2023-08-24 16:51:33,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:51:33,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:33,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:51:33,314 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 16:51:33,316 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 16:51:33,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 16:51:33,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:51:33,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 16:51:33,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:51:33,642 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:51:33,643 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2023-08-24 16:51:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:33,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:51:33,966 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:51:33,966 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 320 treesize of output 312 [2023-08-24 16:51:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:34,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611995236] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:51:34,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:51:34,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-08-24 16:51:34,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200880562] [2023-08-24 16:51:34,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:51:34,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:51:34,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:51:34,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:51:34,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:51:34,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 413 [2023-08-24 16:51:34,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 288 transitions, 4506 flow. Second operand has 17 states, 17 states have (on average 122.17647058823529) internal successors, (2077), 17 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:34,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:51:34,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 413 [2023-08-24 16:51:34,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:51:34,948 INFO L124 PetriNetUnfolderBase]: 858/1774 cut-off events. [2023-08-24 16:51:34,948 INFO L125 PetriNetUnfolderBase]: For 18342/18342 co-relation queries the response was YES. [2023-08-24 16:51:34,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12277 conditions, 1774 events. 858/1774 cut-off events. For 18342/18342 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 11766 event pairs, 39 based on Foata normal form. 5/1778 useless extension candidates. Maximal degree in co-relation 12178. Up to 833 conditions per place. [2023-08-24 16:51:34,961 INFO L140 encePairwiseOnDemand]: 405/413 looper letters, 213 selfloop transitions, 142 changer transitions 5/360 dead transitions. [2023-08-24 16:51:34,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 360 transitions, 5897 flow [2023-08-24 16:51:34,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 16:51:34,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 16:51:34,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2014 transitions. [2023-08-24 16:51:34,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3047820823244552 [2023-08-24 16:51:34,963 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2014 transitions. [2023-08-24 16:51:34,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2014 transitions. [2023-08-24 16:51:34,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:34,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2014 transitions. [2023-08-24 16:51:34,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 125.875) internal successors, (2014), 16 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:34,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 413.0) internal successors, (7021), 17 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:34,968 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 413.0) internal successors, (7021), 17 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:34,968 INFO L175 Difference]: Start difference. First operand has 228 places, 288 transitions, 4506 flow. Second operand 16 states and 2014 transitions. [2023-08-24 16:51:34,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 360 transitions, 5897 flow [2023-08-24 16:51:35,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 360 transitions, 5668 flow, removed 65 selfloop flow, removed 17 redundant places. [2023-08-24 16:51:35,059 INFO L231 Difference]: Finished difference. Result has 233 places, 301 transitions, 4975 flow [2023-08-24 16:51:35,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=4309, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4975, PETRI_PLACES=233, PETRI_TRANSITIONS=301} [2023-08-24 16:51:35,059 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 212 predicate places. [2023-08-24 16:51:35,059 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 301 transitions, 4975 flow [2023-08-24 16:51:35,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 122.17647058823529) internal successors, (2077), 17 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:35,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:51:35,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:51:35,067 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 16:51:35,266 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,SelfDestructingSolverStorable19 [2023-08-24 16:51:35,267 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 16:51:35,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:51:35,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1599821316, now seen corresponding path program 10 times [2023-08-24 16:51:35,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:51:35,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720108543] [2023-08-24 16:51:35,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:51:35,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:51:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:35,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:51:35,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720108543] [2023-08-24 16:51:35,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720108543] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:51:35,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348822751] [2023-08-24 16:51:35,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:51:35,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:35,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:51:35,388 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 16:51:35,389 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 16:51:35,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:51:35,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:51:35,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 16:51:35,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:51:35,691 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:51:35,692 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 227 treesize of output 217 [2023-08-24 16:51:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:35,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:51:36,456 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:51:36,456 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 213 treesize of output 182 [2023-08-24 16:51:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:37,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348822751] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:51:37,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:51:37,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-08-24 16:51:37,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753590554] [2023-08-24 16:51:37,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:51:37,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:51:37,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:51:37,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:51:37,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:51:37,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 413 [2023-08-24 16:51:37,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 301 transitions, 4975 flow. Second operand has 17 states, 17 states have (on average 122.17647058823529) internal successors, (2077), 17 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:37,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:51:37,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 413 [2023-08-24 16:51:37,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:51:39,741 INFO L124 PetriNetUnfolderBase]: 855/1761 cut-off events. [2023-08-24 16:51:39,742 INFO L125 PetriNetUnfolderBase]: For 19111/19111 co-relation queries the response was YES. [2023-08-24 16:51:39,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12480 conditions, 1761 events. 855/1761 cut-off events. For 19111/19111 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 11627 event pairs, 37 based on Foata normal form. 6/1766 useless extension candidates. Maximal degree in co-relation 12382. Up to 922 conditions per place. [2023-08-24 16:51:39,754 INFO L140 encePairwiseOnDemand]: 405/413 looper letters, 207 selfloop transitions, 142 changer transitions 12/361 dead transitions. [2023-08-24 16:51:39,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 361 transitions, 5980 flow [2023-08-24 16:51:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 16:51:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 16:51:39,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2525 transitions. [2023-08-24 16:51:39,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3056900726392252 [2023-08-24 16:51:39,778 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2525 transitions. [2023-08-24 16:51:39,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2525 transitions. [2023-08-24 16:51:39,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:39,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2525 transitions. [2023-08-24 16:51:39,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 126.25) internal successors, (2525), 20 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:39,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:39,785 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:39,785 INFO L175 Difference]: Start difference. First operand has 233 places, 301 transitions, 4975 flow. Second operand 20 states and 2525 transitions. [2023-08-24 16:51:39,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 361 transitions, 5980 flow [2023-08-24 16:51:39,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 361 transitions, 5845 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-08-24 16:51:39,887 INFO L231 Difference]: Finished difference. Result has 248 places, 297 transitions, 5088 flow [2023-08-24 16:51:39,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=4818, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5088, PETRI_PLACES=248, PETRI_TRANSITIONS=297} [2023-08-24 16:51:39,888 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 227 predicate places. [2023-08-24 16:51:39,888 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 297 transitions, 5088 flow [2023-08-24 16:51:39,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 122.17647058823529) internal successors, (2077), 17 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:39,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:51:39,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:51:39,895 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 16:51:40,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:40,093 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 16:51:40,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:51:40,093 INFO L85 PathProgramCache]: Analyzing trace with hash 426952075, now seen corresponding path program 5 times [2023-08-24 16:51:40,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:51:40,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33633480] [2023-08-24 16:51:40,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:51:40,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:51:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:40,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:51:40,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33633480] [2023-08-24 16:51:40,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33633480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:51:40,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637800637] [2023-08-24 16:51:40,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:51:40,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:40,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:51:40,310 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 16:51:40,311 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 16:51:40,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:51:40,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:51:40,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 16:51:40,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:51:40,585 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:51:40,586 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 283 treesize of output 268 [2023-08-24 16:51:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:40,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:51:41,076 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 16:51:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:41,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637800637] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:51:41,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:51:41,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 16:51:41,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117350376] [2023-08-24 16:51:41,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:51:41,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 16:51:41,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:51:41,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 16:51:41,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-08-24 16:51:41,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:51:41,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 297 transitions, 5088 flow. Second operand has 11 states, 11 states have (on average 155.1818181818182) internal successors, (1707), 11 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:41,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:51:41,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:51:41,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:51:41,881 INFO L124 PetriNetUnfolderBase]: 1050/2075 cut-off events. [2023-08-24 16:51:41,881 INFO L125 PetriNetUnfolderBase]: For 23876/23876 co-relation queries the response was YES. [2023-08-24 16:51:41,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15098 conditions, 2075 events. 1050/2075 cut-off events. For 23876/23876 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 13587 event pairs, 35 based on Foata normal form. 4/2078 useless extension candidates. Maximal degree in co-relation 14998. Up to 659 conditions per place. [2023-08-24 16:51:41,899 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 223 selfloop transitions, 189 changer transitions 0/412 dead transitions. [2023-08-24 16:51:41,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 412 transitions, 7220 flow [2023-08-24 16:51:41,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 16:51:41,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 16:51:41,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2399 transitions. [2023-08-24 16:51:41,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3872477804681195 [2023-08-24 16:51:41,907 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2399 transitions. [2023-08-24 16:51:41,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2399 transitions. [2023-08-24 16:51:41,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:41,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2399 transitions. [2023-08-24 16:51:41,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 159.93333333333334) internal successors, (2399), 15 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:41,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:41,912 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:41,913 INFO L175 Difference]: Start difference. First operand has 248 places, 297 transitions, 5088 flow. Second operand 15 states and 2399 transitions. [2023-08-24 16:51:41,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 412 transitions, 7220 flow [2023-08-24 16:51:42,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 412 transitions, 6911 flow, removed 27 selfloop flow, removed 14 redundant places. [2023-08-24 16:51:42,040 INFO L231 Difference]: Finished difference. Result has 249 places, 341 transitions, 6010 flow [2023-08-24 16:51:42,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=4809, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6010, PETRI_PLACES=249, PETRI_TRANSITIONS=341} [2023-08-24 16:51:42,041 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 228 predicate places. [2023-08-24 16:51:42,041 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 341 transitions, 6010 flow [2023-08-24 16:51:42,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 155.1818181818182) internal successors, (1707), 11 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:42,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:51:42,041 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:51:42,046 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 16:51:42,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:42,244 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 16:51:42,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:51:42,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2112803463, now seen corresponding path program 6 times [2023-08-24 16:51:42,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:51:42,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992791007] [2023-08-24 16:51:42,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:51:42,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:51:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:42,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:51:42,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992791007] [2023-08-24 16:51:42,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992791007] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:51:42,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409914333] [2023-08-24 16:51:42,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:51:42,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:42,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:51:42,465 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 16:51:42,490 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 16:51:42,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 16:51:42,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:51:42,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 16:51:42,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:51:42,724 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 92 [2023-08-24 16:51:42,772 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2023-08-24 16:51:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:42,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:51:42,929 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 16:51:43,025 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-24 16:51:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:43,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409914333] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:51:43,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:51:43,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 16:51:43,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350859343] [2023-08-24 16:51:43,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:51:43,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 16:51:43,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:51:43,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 16:51:43,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-24 16:51:43,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:51:43,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 341 transitions, 6010 flow. Second operand has 13 states, 13 states have (on average 154.92307692307693) internal successors, (2014), 13 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:43,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:51:43,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:51:43,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:51:43,964 INFO L124 PetriNetUnfolderBase]: 1224/2403 cut-off events. [2023-08-24 16:51:43,964 INFO L125 PetriNetUnfolderBase]: For 32160/32160 co-relation queries the response was YES. [2023-08-24 16:51:43,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17803 conditions, 2403 events. 1224/2403 cut-off events. For 32160/32160 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15869 event pairs, 53 based on Foata normal form. 4/2406 useless extension candidates. Maximal degree in co-relation 17702. Up to 785 conditions per place. [2023-08-24 16:51:43,981 INFO L140 encePairwiseOnDemand]: 406/413 looper letters, 228 selfloop transitions, 237 changer transitions 0/465 dead transitions. [2023-08-24 16:51:43,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 465 transitions, 8460 flow [2023-08-24 16:51:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 16:51:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 16:51:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2400 transitions. [2023-08-24 16:51:43,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.387409200968523 [2023-08-24 16:51:43,983 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2400 transitions. [2023-08-24 16:51:43,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2400 transitions. [2023-08-24 16:51:43,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:43,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2400 transitions. [2023-08-24 16:51:43,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 160.0) internal successors, (2400), 15 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:43,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:43,988 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:43,988 INFO L175 Difference]: Start difference. First operand has 249 places, 341 transitions, 6010 flow. Second operand 15 states and 2400 transitions. [2023-08-24 16:51:43,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 465 transitions, 8460 flow [2023-08-24 16:51:44,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 465 transitions, 8093 flow, removed 107 selfloop flow, removed 8 redundant places. [2023-08-24 16:51:44,133 INFO L231 Difference]: Finished difference. Result has 262 places, 386 transitions, 7129 flow [2023-08-24 16:51:44,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=5698, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7129, PETRI_PLACES=262, PETRI_TRANSITIONS=386} [2023-08-24 16:51:44,134 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 241 predicate places. [2023-08-24 16:51:44,134 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 386 transitions, 7129 flow [2023-08-24 16:51:44,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 154.92307692307693) internal successors, (2014), 13 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:44,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:51:44,134 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:51:44,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-24 16:51:44,339 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,SelfDestructingSolverStorable22 [2023-08-24 16:51:44,339 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 16:51:44,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:51:44,339 INFO L85 PathProgramCache]: Analyzing trace with hash -929133749, now seen corresponding path program 7 times [2023-08-24 16:51:44,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:51:44,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301132491] [2023-08-24 16:51:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:51:44,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:51:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:44,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:51:44,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301132491] [2023-08-24 16:51:44,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301132491] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:51:44,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371402177] [2023-08-24 16:51:44,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:51:44,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:44,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:51:44,479 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 16:51:44,481 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 16:51:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:44,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 16:51:44,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:51:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:44,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:51:44,841 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 16:51:44,939 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-24 16:51:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:45,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371402177] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:51:45,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:51:45,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 16:51:45,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654790588] [2023-08-24 16:51:45,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:51:45,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 16:51:45,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:51:45,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 16:51:45,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-08-24 16:51:45,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:51:45,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 386 transitions, 7129 flow. Second operand has 11 states, 11 states have (on average 155.27272727272728) internal successors, (1708), 11 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:45,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:51:45,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:51:45,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:51:45,880 INFO L124 PetriNetUnfolderBase]: 1222/2407 cut-off events. [2023-08-24 16:51:45,880 INFO L125 PetriNetUnfolderBase]: For 34320/34320 co-relation queries the response was YES. [2023-08-24 16:51:45,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18491 conditions, 2407 events. 1222/2407 cut-off events. For 34320/34320 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 15966 event pairs, 148 based on Foata normal form. 24/2430 useless extension candidates. Maximal degree in co-relation 18385. Up to 889 conditions per place. [2023-08-24 16:51:45,900 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 256 selfloop transitions, 185 changer transitions 0/441 dead transitions. [2023-08-24 16:51:45,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 441 transitions, 8388 flow [2023-08-24 16:51:45,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 16:51:45,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 16:51:45,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2542 transitions. [2023-08-24 16:51:45,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38468523002421307 [2023-08-24 16:51:45,903 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2542 transitions. [2023-08-24 16:51:45,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2542 transitions. [2023-08-24 16:51:45,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:45,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2542 transitions. [2023-08-24 16:51:45,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 158.875) internal successors, (2542), 16 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:45,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 413.0) internal successors, (7021), 17 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:45,908 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 413.0) internal successors, (7021), 17 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:45,909 INFO L175 Difference]: Start difference. First operand has 262 places, 386 transitions, 7129 flow. Second operand 16 states and 2542 transitions. [2023-08-24 16:51:45,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 441 transitions, 8388 flow [2023-08-24 16:51:46,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 441 transitions, 8061 flow, removed 27 selfloop flow, removed 8 redundant places. [2023-08-24 16:51:46,092 INFO L231 Difference]: Finished difference. Result has 269 places, 387 transitions, 7181 flow [2023-08-24 16:51:46,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=6742, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7181, PETRI_PLACES=269, PETRI_TRANSITIONS=387} [2023-08-24 16:51:46,093 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 248 predicate places. [2023-08-24 16:51:46,093 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 387 transitions, 7181 flow [2023-08-24 16:51:46,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 155.27272727272728) internal successors, (1708), 11 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:46,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:51:46,094 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:51:46,101 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 16:51:46,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:46,298 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 16:51:46,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:51:46,298 INFO L85 PathProgramCache]: Analyzing trace with hash -659909024, now seen corresponding path program 11 times [2023-08-24 16:51:46,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:51:46,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010133146] [2023-08-24 16:51:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:51:46,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:51:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:51:46,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:51:46,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010133146] [2023-08-24 16:51:46,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010133146] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:51:46,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857333760] [2023-08-24 16:51:46,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:51:46,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:46,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:51:46,936 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 16:51:46,938 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 16:51:47,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:51:47,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:51:47,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 16:51:47,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:51:47,366 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:51:47,367 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 41 treesize of output 26 [2023-08-24 16:51:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:51:47,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:51:48,415 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-24 16:51:48,415 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 80 treesize of output 86 [2023-08-24 16:51:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:51:48,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857333760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:51:48,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:51:48,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 16:51:48,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735243635] [2023-08-24 16:51:48,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:51:48,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 16:51:48,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:51:48,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 16:51:48,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2023-08-24 16:51:48,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 413 [2023-08-24 16:51:48,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 387 transitions, 7181 flow. Second operand has 25 states, 25 states have (on average 107.6) internal successors, (2690), 25 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:48,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:51:48,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 413 [2023-08-24 16:51:48,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:51:51,084 INFO L124 PetriNetUnfolderBase]: 1752/3391 cut-off events. [2023-08-24 16:51:51,084 INFO L125 PetriNetUnfolderBase]: For 53755/53755 co-relation queries the response was YES. [2023-08-24 16:51:51,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27296 conditions, 3391 events. 1752/3391 cut-off events. For 53755/53755 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 23697 event pairs, 82 based on Foata normal form. 7/3396 useless extension candidates. Maximal degree in co-relation 27086. Up to 1934 conditions per place. [2023-08-24 16:51:51,112 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 331 selfloop transitions, 346 changer transitions 18/695 dead transitions. [2023-08-24 16:51:51,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 695 transitions, 13430 flow [2023-08-24 16:51:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 16:51:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 16:51:51,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3270 transitions. [2023-08-24 16:51:51,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27302329464807545 [2023-08-24 16:51:51,121 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3270 transitions. [2023-08-24 16:51:51,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3270 transitions. [2023-08-24 16:51:51,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:51,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3270 transitions. [2023-08-24 16:51:51,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 112.75862068965517) internal successors, (3270), 29 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:51,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 413.0) internal successors, (12390), 30 states have internal predecessors, (12390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:51,133 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 413.0) internal successors, (12390), 30 states have internal predecessors, (12390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:51,133 INFO L175 Difference]: Start difference. First operand has 269 places, 387 transitions, 7181 flow. Second operand 29 states and 3270 transitions. [2023-08-24 16:51:51,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 695 transitions, 13430 flow [2023-08-24 16:51:51,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 695 transitions, 13203 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-08-24 16:51:51,400 INFO L231 Difference]: Finished difference. Result has 308 places, 598 transitions, 12694 flow [2023-08-24 16:51:51,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=7066, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=12694, PETRI_PLACES=308, PETRI_TRANSITIONS=598} [2023-08-24 16:51:51,401 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2023-08-24 16:51:51,401 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 598 transitions, 12694 flow [2023-08-24 16:51:51,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 107.6) internal successors, (2690), 25 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:51,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:51:51,401 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:51:51,410 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 16:51:51,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:51,606 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 16:51:51,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:51:51,606 INFO L85 PathProgramCache]: Analyzing trace with hash 550599420, now seen corresponding path program 12 times [2023-08-24 16:51:51,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:51:51,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109124699] [2023-08-24 16:51:51,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:51:51,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:51:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:51:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:51:52,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:51:52,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109124699] [2023-08-24 16:51:52,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109124699] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:51:52,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229162521] [2023-08-24 16:51:52,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:51:52,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:51:52,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:51:52,215 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 16:51:52,232 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 16:51:52,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 16:51:52,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:51:52,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 16:51:52,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:51:52,655 INFO L322 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2023-08-24 16:51:52,655 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 233 treesize of output 225 [2023-08-24 16:51:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:51:52,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:51:53,629 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-24 16:51:53,630 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 47 treesize of output 77 [2023-08-24 16:51:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:51:53,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229162521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:51:53,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:51:53,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 20 [2023-08-24 16:51:53,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041317990] [2023-08-24 16:51:53,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:51:53,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 16:51:53,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:51:53,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 16:51:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2023-08-24 16:51:53,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 413 [2023-08-24 16:51:53,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 598 transitions, 12694 flow. Second operand has 22 states, 22 states have (on average 107.95454545454545) internal successors, (2375), 22 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:53,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:51:53,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 413 [2023-08-24 16:51:53,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:51:59,421 INFO L124 PetriNetUnfolderBase]: 2074/4084 cut-off events. [2023-08-24 16:51:59,421 INFO L125 PetriNetUnfolderBase]: For 83375/83375 co-relation queries the response was YES. [2023-08-24 16:51:59,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36046 conditions, 4084 events. 2074/4084 cut-off events. For 83375/83375 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 30369 event pairs, 58 based on Foata normal form. 7/4090 useless extension candidates. Maximal degree in co-relation 35850. Up to 987 conditions per place. [2023-08-24 16:51:59,459 INFO L140 encePairwiseOnDemand]: 401/413 looper letters, 239 selfloop transitions, 584 changer transitions 10/833 dead transitions. [2023-08-24 16:51:59,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 833 transitions, 17566 flow [2023-08-24 16:51:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 16:51:59,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 16:51:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4046 transitions. [2023-08-24 16:51:59,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2721280602636535 [2023-08-24 16:51:59,601 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4046 transitions. [2023-08-24 16:51:59,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4046 transitions. [2023-08-24 16:51:59,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:51:59,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4046 transitions. [2023-08-24 16:51:59,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 112.38888888888889) internal successors, (4046), 36 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:59,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 413.0) internal successors, (15281), 37 states have internal predecessors, (15281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:59,617 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 413.0) internal successors, (15281), 37 states have internal predecessors, (15281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:51:59,617 INFO L175 Difference]: Start difference. First operand has 308 places, 598 transitions, 12694 flow. Second operand 36 states and 4046 transitions. [2023-08-24 16:51:59,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 833 transitions, 17566 flow [2023-08-24 16:52:00,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 833 transitions, 17107 flow, removed 219 selfloop flow, removed 6 redundant places. [2023-08-24 16:52:00,290 INFO L231 Difference]: Finished difference. Result has 349 places, 717 transitions, 16982 flow [2023-08-24 16:52:00,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=12359, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=16982, PETRI_PLACES=349, PETRI_TRANSITIONS=717} [2023-08-24 16:52:00,290 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 328 predicate places. [2023-08-24 16:52:00,291 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 717 transitions, 16982 flow [2023-08-24 16:52:00,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 107.95454545454545) internal successors, (2375), 22 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:00,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:52:00,291 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:52:00,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 16:52:00,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:52:00,496 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 16:52:00,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:52:00,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1719539208, now seen corresponding path program 13 times [2023-08-24 16:52:00,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:52:00,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391042990] [2023-08-24 16:52:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:52:00,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:52:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:52:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:52:01,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:52:01,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391042990] [2023-08-24 16:52:01,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391042990] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:52:01,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088464016] [2023-08-24 16:52:01,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:52:01,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:52:01,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:52:01,794 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 16:52:01,798 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 16:52:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:52:01,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 16:52:01,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:52:01,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-24 16:52:02,046 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 16:52:02,083 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 16:52:02,317 INFO L322 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2023-08-24 16:52:02,317 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 229 treesize of output 221 [2023-08-24 16:52:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:52:02,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:52:04,081 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:52:04,081 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 166 treesize of output 106 [2023-08-24 16:52:04,129 INFO L322 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-08-24 16:52:04,129 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 592 treesize of output 571 [2023-08-24 16:52:04,185 INFO L322 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-08-24 16:52:04,186 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 136 [2023-08-24 16:52:04,431 INFO L322 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-08-24 16:52:04,431 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 133 [2023-08-24 16:52:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:52:04,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088464016] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:52:04,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:52:04,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-08-24 16:52:04,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825948908] [2023-08-24 16:52:04,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:52:04,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 16:52:04,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:52:04,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 16:52:04,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=558, Unknown=4, NotChecked=0, Total=702 [2023-08-24 16:52:04,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 16:52:04,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 717 transitions, 16982 flow. Second operand has 27 states, 27 states have (on average 100.70370370370371) internal successors, (2719), 27 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:04,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:52:04,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 16:52:04,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:52:12,617 INFO L124 PetriNetUnfolderBase]: 2207/4402 cut-off events. [2023-08-24 16:52:12,618 INFO L125 PetriNetUnfolderBase]: For 110215/110215 co-relation queries the response was YES. [2023-08-24 16:52:12,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42401 conditions, 4402 events. 2207/4402 cut-off events. For 110215/110215 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33706 event pairs, 105 based on Foata normal form. 5/4406 useless extension candidates. Maximal degree in co-relation 42131. Up to 1862 conditions per place. [2023-08-24 16:52:12,669 INFO L140 encePairwiseOnDemand]: 401/413 looper letters, 310 selfloop transitions, 554 changer transitions 12/876 dead transitions. [2023-08-24 16:52:12,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 876 transitions, 21044 flow [2023-08-24 16:52:12,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 16:52:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 16:52:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3160 transitions. [2023-08-24 16:52:12,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.255044390637611 [2023-08-24 16:52:12,674 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3160 transitions. [2023-08-24 16:52:12,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3160 transitions. [2023-08-24 16:52:12,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:52:12,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3160 transitions. [2023-08-24 16:52:12,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 105.33333333333333) internal successors, (3160), 30 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:12,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 413.0) internal successors, (12803), 31 states have internal predecessors, (12803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:12,682 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 413.0) internal successors, (12803), 31 states have internal predecessors, (12803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:12,682 INFO L175 Difference]: Start difference. First operand has 349 places, 717 transitions, 16982 flow. Second operand 30 states and 3160 transitions. [2023-08-24 16:52:12,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 876 transitions, 21044 flow [2023-08-24 16:52:13,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 876 transitions, 20286 flow, removed 351 selfloop flow, removed 9 redundant places. [2023-08-24 16:52:13,825 INFO L231 Difference]: Finished difference. Result has 379 places, 786 transitions, 20017 flow [2023-08-24 16:52:13,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=16383, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=20017, PETRI_PLACES=379, PETRI_TRANSITIONS=786} [2023-08-24 16:52:13,826 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 358 predicate places. [2023-08-24 16:52:13,826 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 786 transitions, 20017 flow [2023-08-24 16:52:13,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 100.70370370370371) internal successors, (2719), 27 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:13,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:52:13,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:52:13,831 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 16:52:14,030 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,SelfDestructingSolverStorable26 [2023-08-24 16:52:14,031 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 16:52:14,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:52:14,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1051632962, now seen corresponding path program 14 times [2023-08-24 16:52:14,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:52:14,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362419120] [2023-08-24 16:52:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:52:14,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:52:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:52:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:52:14,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:52:14,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362419120] [2023-08-24 16:52:14,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362419120] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:52:14,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056383434] [2023-08-24 16:52:14,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:52:14,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:52:14,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:52:14,988 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 16:52:14,989 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 16:52:15,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:52:15,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:52:15,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-24 16:52:15,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:52:15,193 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 16:52:15,229 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 16:52:15,257 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 16:52:15,574 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:52:15,574 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 34 treesize of output 23 [2023-08-24 16:52:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:52:15,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:52:19,459 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:52:19,459 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 137 treesize of output 89 [2023-08-24 16:52:19,504 INFO L322 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-08-24 16:52:19,504 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 213 treesize of output 248 [2023-08-24 16:52:19,550 INFO L322 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-08-24 16:52:19,551 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 185 [2023-08-24 16:52:19,602 INFO L322 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-08-24 16:52:19,602 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 113 [2023-08-24 16:52:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:52:20,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056383434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:52:20,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:52:20,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 29 [2023-08-24 16:52:20,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467859725] [2023-08-24 16:52:20,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:52:20,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 16:52:20,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:52:20,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 16:52:20,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=725, Unknown=7, NotChecked=0, Total=930 [2023-08-24 16:52:20,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 16:52:20,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 786 transitions, 20017 flow. Second operand has 31 states, 31 states have (on average 100.48387096774194) internal successors, (3115), 31 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:20,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:52:20,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 16:52:20,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:52:30,123 INFO L124 PetriNetUnfolderBase]: 2243/4482 cut-off events. [2023-08-24 16:52:30,123 INFO L125 PetriNetUnfolderBase]: For 117980/117980 co-relation queries the response was YES. [2023-08-24 16:52:30,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44669 conditions, 4482 events. 2243/4482 cut-off events. For 117980/117980 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 34501 event pairs, 100 based on Foata normal form. 15/4496 useless extension candidates. Maximal degree in co-relation 44377. Up to 1687 conditions per place. [2023-08-24 16:52:30,172 INFO L140 encePairwiseOnDemand]: 401/413 looper letters, 276 selfloop transitions, 608 changer transitions 19/903 dead transitions. [2023-08-24 16:52:30,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 903 transitions, 22963 flow [2023-08-24 16:52:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-24 16:52:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-24 16:52:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4482 transitions. [2023-08-24 16:52:30,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25237907539838955 [2023-08-24 16:52:30,176 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4482 transitions. [2023-08-24 16:52:30,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4482 transitions. [2023-08-24 16:52:30,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:52:30,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4482 transitions. [2023-08-24 16:52:30,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 104.23255813953489) internal successors, (4482), 43 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:30,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 413.0) internal successors, (18172), 44 states have internal predecessors, (18172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:30,187 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 413.0) internal successors, (18172), 44 states have internal predecessors, (18172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:30,187 INFO L175 Difference]: Start difference. First operand has 379 places, 786 transitions, 20017 flow. Second operand 43 states and 4482 transitions. [2023-08-24 16:52:30,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 903 transitions, 22963 flow [2023-08-24 16:52:31,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 903 transitions, 22611 flow, removed 154 selfloop flow, removed 11 redundant places. [2023-08-24 16:52:31,184 INFO L231 Difference]: Finished difference. Result has 417 places, 806 transitions, 21990 flow [2023-08-24 16:52:31,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=19671, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=578, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=21990, PETRI_PLACES=417, PETRI_TRANSITIONS=806} [2023-08-24 16:52:31,185 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 396 predicate places. [2023-08-24 16:52:31,185 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 806 transitions, 21990 flow [2023-08-24 16:52:31,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 100.48387096774194) internal successors, (3115), 31 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:31,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:52:31,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:52:31,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 16:52:31,390 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,SelfDestructingSolverStorable27 [2023-08-24 16:52:31,390 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 16:52:31,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:52:31,391 INFO L85 PathProgramCache]: Analyzing trace with hash 177300376, now seen corresponding path program 8 times [2023-08-24 16:52:31,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:52:31,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401957343] [2023-08-24 16:52:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:52:31,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:52:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:52:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:52:31,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:52:31,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401957343] [2023-08-24 16:52:31,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401957343] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:52:31,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174072498] [2023-08-24 16:52:31,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:52:31,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:52:31,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:52:31,591 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 16:52:31,592 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 16:52:31,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:52:31,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:52:31,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:52:31,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:52:31,921 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:52:31,921 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 283 treesize of output 268 [2023-08-24 16:52:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:52:32,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:52:32,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-24 16:52:32,403 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 16:52:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:52:32,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174072498] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:52:32,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:52:32,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-24 16:52:32,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721467356] [2023-08-24 16:52:32,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:52:32,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 16:52:32,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:52:32,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 16:52:32,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-08-24 16:52:32,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:52:32,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 806 transitions, 21990 flow. Second operand has 13 states, 13 states have (on average 154.92307692307693) internal successors, (2014), 13 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:32,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:52:32,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:52:32,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:52:35,879 INFO L124 PetriNetUnfolderBase]: 2365/4641 cut-off events. [2023-08-24 16:52:35,880 INFO L125 PetriNetUnfolderBase]: For 144332/144332 co-relation queries the response was YES. [2023-08-24 16:52:35,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48692 conditions, 4641 events. 2365/4641 cut-off events. For 144332/144332 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35351 event pairs, 344 based on Foata normal form. 14/4654 useless extension candidates. Maximal degree in co-relation 48419. Up to 2087 conditions per place. [2023-08-24 16:52:35,941 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 518 selfloop transitions, 410 changer transitions 0/928 dead transitions. [2023-08-24 16:52:35,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 928 transitions, 25384 flow [2023-08-24 16:52:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 16:52:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 16:52:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3521 transitions. [2023-08-24 16:52:35,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38751926040061635 [2023-08-24 16:52:35,944 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3521 transitions. [2023-08-24 16:52:35,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3521 transitions. [2023-08-24 16:52:35,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:52:35,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3521 transitions. [2023-08-24 16:52:35,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 160.04545454545453) internal successors, (3521), 22 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:35,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 413.0) internal successors, (9499), 23 states have internal predecessors, (9499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:35,951 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 413.0) internal successors, (9499), 23 states have internal predecessors, (9499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:35,951 INFO L175 Difference]: Start difference. First operand has 417 places, 806 transitions, 21990 flow. Second operand 22 states and 3521 transitions. [2023-08-24 16:52:35,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 928 transitions, 25384 flow [2023-08-24 16:52:37,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 928 transitions, 24519 flow, removed 107 selfloop flow, removed 24 redundant places. [2023-08-24 16:52:37,353 INFO L231 Difference]: Finished difference. Result has 415 places, 852 transitions, 23240 flow [2023-08-24 16:52:37,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=21102, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=23240, PETRI_PLACES=415, PETRI_TRANSITIONS=852} [2023-08-24 16:52:37,354 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 394 predicate places. [2023-08-24 16:52:37,354 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 852 transitions, 23240 flow [2023-08-24 16:52:37,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 154.92307692307693) internal successors, (2014), 13 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:37,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:52:37,355 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:52:37,359 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 16:52:37,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 16:52:37,556 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 16:52:37,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:52:37,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1267880478, now seen corresponding path program 9 times [2023-08-24 16:52:37,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:52:37,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658221860] [2023-08-24 16:52:37,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:52:37,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:52:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:52:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:52:37,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:52:37,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658221860] [2023-08-24 16:52:37,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658221860] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:52:37,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848005816] [2023-08-24 16:52:37,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:52:37,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:52:37,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:52:37,813 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 16:52:37,815 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 16:52:37,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 16:52:37,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:52:37,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 16:52:37,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:52:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:52:38,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:52:38,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 16:52:38,281 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 16:52:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:52:38,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848005816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:52:38,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:52:38,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 16:52:38,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839038824] [2023-08-24 16:52:38,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:52:38,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 16:52:38,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:52:38,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 16:52:38,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-08-24 16:52:38,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:52:38,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 852 transitions, 23240 flow. Second operand has 12 states, 12 states have (on average 155.08333333333334) internal successors, (1861), 12 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:38,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:52:38,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:52:38,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:52:40,919 INFO L124 PetriNetUnfolderBase]: 2756/5518 cut-off events. [2023-08-24 16:52:40,919 INFO L125 PetriNetUnfolderBase]: For 161292/161292 co-relation queries the response was YES. [2023-08-24 16:52:40,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56720 conditions, 5518 events. 2756/5518 cut-off events. For 161292/161292 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 43658 event pairs, 80 based on Foata normal form. 28/5545 useless extension candidates. Maximal degree in co-relation 56432. Up to 1674 conditions per place. [2023-08-24 16:52:40,985 INFO L140 encePairwiseOnDemand]: 406/413 looper letters, 489 selfloop transitions, 618 changer transitions 0/1107 dead transitions. [2023-08-24 16:52:40,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1107 transitions, 30809 flow [2023-08-24 16:52:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 16:52:40,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 16:52:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3669 transitions. [2023-08-24 16:52:40,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862511843351932 [2023-08-24 16:52:40,988 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3669 transitions. [2023-08-24 16:52:40,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3669 transitions. [2023-08-24 16:52:40,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:52:40,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3669 transitions. [2023-08-24 16:52:40,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 159.52173913043478) internal successors, (3669), 23 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:40,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 413.0) internal successors, (9912), 24 states have internal predecessors, (9912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:40,995 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 413.0) internal successors, (9912), 24 states have internal predecessors, (9912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:40,995 INFO L175 Difference]: Start difference. First operand has 415 places, 852 transitions, 23240 flow. Second operand 23 states and 3669 transitions. [2023-08-24 16:52:40,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1107 transitions, 30809 flow [2023-08-24 16:52:42,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1107 transitions, 30163 flow, removed 96 selfloop flow, removed 9 redundant places. [2023-08-24 16:52:42,368 INFO L231 Difference]: Finished difference. Result has 435 places, 964 transitions, 27477 flow [2023-08-24 16:52:42,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=22672, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=535, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=27477, PETRI_PLACES=435, PETRI_TRANSITIONS=964} [2023-08-24 16:52:42,368 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 414 predicate places. [2023-08-24 16:52:42,369 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 964 transitions, 27477 flow [2023-08-24 16:52:42,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.08333333333334) internal successors, (1861), 12 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:42,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:52:42,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:52:42,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-24 16:52:42,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:52:42,574 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 16:52:42,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:52:42,574 INFO L85 PathProgramCache]: Analyzing trace with hash -508525832, now seen corresponding path program 15 times [2023-08-24 16:52:42,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:52:42,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967369327] [2023-08-24 16:52:42,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:52:42,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:52:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:52:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:52:43,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:52:43,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967369327] [2023-08-24 16:52:43,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967369327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:52:43,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287736957] [2023-08-24 16:52:43,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:52:43,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:52:43,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:52:43,183 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 16:52:43,185 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 16:52:43,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 16:52:43,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:52:43,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 16:52:43,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:52:43,665 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:52:43,665 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 41 treesize of output 26 [2023-08-24 16:52:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:52:43,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:52:44,785 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:52:44,786 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 214 treesize of output 190 [2023-08-24 16:52:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:52:46,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287736957] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:52:46,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:52:46,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 16:52:46,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704121031] [2023-08-24 16:52:46,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:52:46,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 16:52:46,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:52:46,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 16:52:46,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2023-08-24 16:52:46,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 16:52:46,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 964 transitions, 27477 flow. Second operand has 25 states, 25 states have (on average 100.64) internal successors, (2516), 25 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:46,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:52:46,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 16:52:46,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:52:50,025 INFO L124 PetriNetUnfolderBase]: 2779/5585 cut-off events. [2023-08-24 16:52:50,025 INFO L125 PetriNetUnfolderBase]: For 184252/184252 co-relation queries the response was YES. [2023-08-24 16:52:50,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59151 conditions, 5585 events. 2779/5585 cut-off events. For 184252/184252 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 44306 event pairs, 115 based on Foata normal form. 6/5590 useless extension candidates. Maximal degree in co-relation 58834. Up to 3700 conditions per place. [2023-08-24 16:52:50,087 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 631 selfloop transitions, 390 changer transitions 15/1036 dead transitions. [2023-08-24 16:52:50,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 1036 transitions, 30109 flow [2023-08-24 16:52:50,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 16:52:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 16:52:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2820 transitions. [2023-08-24 16:52:50,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25289211729889693 [2023-08-24 16:52:50,090 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2820 transitions. [2023-08-24 16:52:50,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2820 transitions. [2023-08-24 16:52:50,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:52:50,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2820 transitions. [2023-08-24 16:52:50,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 104.44444444444444) internal successors, (2820), 27 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:50,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 413.0) internal successors, (11564), 28 states have internal predecessors, (11564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:50,097 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 413.0) internal successors, (11564), 28 states have internal predecessors, (11564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:50,097 INFO L175 Difference]: Start difference. First operand has 435 places, 964 transitions, 27477 flow. Second operand 27 states and 2820 transitions. [2023-08-24 16:52:50,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 1036 transitions, 30109 flow [2023-08-24 16:52:51,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 1036 transitions, 29381 flow, removed 133 selfloop flow, removed 5 redundant places. [2023-08-24 16:52:51,520 INFO L231 Difference]: Finished difference. Result has 461 places, 972 transitions, 28084 flow [2023-08-24 16:52:51,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=26751, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=28084, PETRI_PLACES=461, PETRI_TRANSITIONS=972} [2023-08-24 16:52:51,520 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 440 predicate places. [2023-08-24 16:52:51,520 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 972 transitions, 28084 flow [2023-08-24 16:52:51,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 100.64) internal successors, (2516), 25 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:51,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:52:51,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:52:51,526 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 16:52:51,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:52:51,726 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 16:52:51,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:52:51,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1817150148, now seen corresponding path program 10 times [2023-08-24 16:52:51,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:52:51,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613712516] [2023-08-24 16:52:51,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:52:51,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:52:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:52:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:52:51,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:52:51,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613712516] [2023-08-24 16:52:51,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613712516] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:52:51,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306938924] [2023-08-24 16:52:51,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:52:51,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:52:51,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:52:51,894 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 16:52:51,896 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 16:52:52,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:52:52,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:52:52,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:52:52,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:52:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:52:52,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:52:52,305 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 16:52:52,400 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-24 16:52:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:52:52,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306938924] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:52:52,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:52:52,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-24 16:52:52,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687880203] [2023-08-24 16:52:52,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:52:52,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 16:52:52,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:52:52,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 16:52:52,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-24 16:52:52,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:52:52,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 972 transitions, 28084 flow. Second operand has 14 states, 14 states have (on average 155.14285714285714) internal successors, (2172), 14 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:52,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:52:52,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:52:52,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:52:56,405 INFO L124 PetriNetUnfolderBase]: 2986/5946 cut-off events. [2023-08-24 16:52:56,405 INFO L125 PetriNetUnfolderBase]: For 208379/208379 co-relation queries the response was YES. [2023-08-24 16:52:56,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65167 conditions, 5946 events. 2986/5946 cut-off events. For 208379/208379 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 47279 event pairs, 121 based on Foata normal form. 32/5977 useless extension candidates. Maximal degree in co-relation 64837. Up to 1447 conditions per place. [2023-08-24 16:52:56,474 INFO L140 encePairwiseOnDemand]: 406/413 looper letters, 429 selfloop transitions, 750 changer transitions 0/1179 dead transitions. [2023-08-24 16:52:56,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1179 transitions, 34274 flow [2023-08-24 16:52:56,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 16:52:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 16:52:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4621 transitions. [2023-08-24 16:52:56,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38582282708524673 [2023-08-24 16:52:56,477 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4621 transitions. [2023-08-24 16:52:56,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4621 transitions. [2023-08-24 16:52:56,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:52:56,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4621 transitions. [2023-08-24 16:52:56,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 159.3448275862069) internal successors, (4621), 29 states have internal predecessors, (4621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:56,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 413.0) internal successors, (12390), 30 states have internal predecessors, (12390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:56,485 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 413.0) internal successors, (12390), 30 states have internal predecessors, (12390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:56,485 INFO L175 Difference]: Start difference. First operand has 461 places, 972 transitions, 28084 flow. Second operand 29 states and 4621 transitions. [2023-08-24 16:52:56,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1179 transitions, 34274 flow [2023-08-24 16:52:58,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1179 transitions, 34159 flow, removed 34 selfloop flow, removed 10 redundant places. [2023-08-24 16:52:58,259 INFO L231 Difference]: Finished difference. Result has 484 places, 1047 transitions, 32350 flow [2023-08-24 16:52:58,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=27970, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=679, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=32350, PETRI_PLACES=484, PETRI_TRANSITIONS=1047} [2023-08-24 16:52:58,260 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 463 predicate places. [2023-08-24 16:52:58,260 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 1047 transitions, 32350 flow [2023-08-24 16:52:58,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 155.14285714285714) internal successors, (2172), 14 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:58,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:52:58,260 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:52:58,269 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 16:52:58,465 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,SelfDestructingSolverStorable31 [2023-08-24 16:52:58,465 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 16:52:58,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:52:58,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1664640734, now seen corresponding path program 11 times [2023-08-24 16:52:58,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:52:58,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646984525] [2023-08-24 16:52:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:52:58,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:52:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:52:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:52:58,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:52:58,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646984525] [2023-08-24 16:52:58,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646984525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:52:58,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911657506] [2023-08-24 16:52:58,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:52:58,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:52:58,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:52:58,641 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 16:52:58,643 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 16:52:58,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:52:58,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:52:58,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 16:52:58,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:52:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:52:58,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:52:59,073 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 16:52:59,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 16:52:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:52:59,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911657506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:52:59,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:52:59,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-24 16:52:59,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372065608] [2023-08-24 16:52:59,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:52:59,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 16:52:59,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:52:59,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 16:52:59,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-08-24 16:52:59,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:52:59,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 1047 transitions, 32350 flow. Second operand has 14 states, 14 states have (on average 155.14285714285714) internal successors, (2172), 14 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:52:59,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:52:59,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:52:59,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:53:02,564 INFO L124 PetriNetUnfolderBase]: 3170/6296 cut-off events. [2023-08-24 16:53:02,565 INFO L125 PetriNetUnfolderBase]: For 253579/253579 co-relation queries the response was YES. [2023-08-24 16:53:02,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72817 conditions, 6296 events. 3170/6296 cut-off events. For 253579/253579 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 50505 event pairs, 630 based on Foata normal form. 40/6335 useless extension candidates. Maximal degree in co-relation 72486. Up to 3718 conditions per place. [2023-08-24 16:53:02,646 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 721 selfloop transitions, 464 changer transitions 0/1185 dead transitions. [2023-08-24 16:53:02,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 1185 transitions, 37328 flow [2023-08-24 16:53:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 16:53:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 16:53:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3502 transitions. [2023-08-24 16:53:02,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38542813119084307 [2023-08-24 16:53:02,649 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3502 transitions. [2023-08-24 16:53:02,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3502 transitions. [2023-08-24 16:53:02,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:53:02,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3502 transitions. [2023-08-24 16:53:02,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 159.1818181818182) internal successors, (3502), 22 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:02,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 413.0) internal successors, (9499), 23 states have internal predecessors, (9499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:02,655 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 413.0) internal successors, (9499), 23 states have internal predecessors, (9499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:02,655 INFO L175 Difference]: Start difference. First operand has 484 places, 1047 transitions, 32350 flow. Second operand 22 states and 3502 transitions. [2023-08-24 16:53:02,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 1185 transitions, 37328 flow [2023-08-24 16:53:04,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 1185 transitions, 36161 flow, removed 317 selfloop flow, removed 11 redundant places. [2023-08-24 16:53:04,949 INFO L231 Difference]: Finished difference. Result has 500 places, 1100 transitions, 34511 flow [2023-08-24 16:53:04,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=31113, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=412, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=34511, PETRI_PLACES=500, PETRI_TRANSITIONS=1100} [2023-08-24 16:53:04,950 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 479 predicate places. [2023-08-24 16:53:04,950 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 1100 transitions, 34511 flow [2023-08-24 16:53:04,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 155.14285714285714) internal successors, (2172), 14 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:04,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:53:04,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:53:04,957 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 16:53:05,155 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,SelfDestructingSolverStorable32 [2023-08-24 16:53:05,156 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 16:53:05,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:53:05,156 INFO L85 PathProgramCache]: Analyzing trace with hash 720407506, now seen corresponding path program 12 times [2023-08-24 16:53:05,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:53:05,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612072340] [2023-08-24 16:53:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:53:05,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:53:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:53:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:53:05,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:53:05,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612072340] [2023-08-24 16:53:05,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612072340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:53:05,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324577923] [2023-08-24 16:53:05,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:53:05,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:53:05,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:53:05,315 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 16:53:05,331 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 16:53:05,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 16:53:05,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:53:05,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 16:53:05,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:53:05,617 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2023-08-24 16:53:05,637 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 92 [2023-08-24 16:53:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:53:05,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:53:05,818 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-24 16:53:05,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 16:53:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:53:06,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324577923] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:53:06,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:53:06,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 16:53:06,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187666215] [2023-08-24 16:53:06,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:53:06,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 16:53:06,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:53:06,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 16:53:06,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-24 16:53:06,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:53:06,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 1100 transitions, 34511 flow. Second operand has 15 states, 15 states have (on average 154.8) internal successors, (2322), 15 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:06,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:53:06,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:53:06,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:53:09,847 INFO L124 PetriNetUnfolderBase]: 3265/6445 cut-off events. [2023-08-24 16:53:09,847 INFO L125 PetriNetUnfolderBase]: For 262693/262693 co-relation queries the response was YES. [2023-08-24 16:53:09,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75159 conditions, 6445 events. 3265/6445 cut-off events. For 262693/262693 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 51640 event pairs, 631 based on Foata normal form. 26/6470 useless extension candidates. Maximal degree in co-relation 74822. Up to 3755 conditions per place. [2023-08-24 16:53:09,937 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 724 selfloop transitions, 488 changer transitions 0/1212 dead transitions. [2023-08-24 16:53:09,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 1212 transitions, 38596 flow [2023-08-24 16:53:09,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 16:53:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 16:53:09,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3660 transitions. [2023-08-24 16:53:09,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38530371618065057 [2023-08-24 16:53:09,939 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3660 transitions. [2023-08-24 16:53:09,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3660 transitions. [2023-08-24 16:53:09,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:53:09,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3660 transitions. [2023-08-24 16:53:09,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 159.1304347826087) internal successors, (3660), 23 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:09,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 413.0) internal successors, (9912), 24 states have internal predecessors, (9912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:09,949 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 413.0) internal successors, (9912), 24 states have internal predecessors, (9912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:09,949 INFO L175 Difference]: Start difference. First operand has 500 places, 1100 transitions, 34511 flow. Second operand 23 states and 3660 transitions. [2023-08-24 16:53:09,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 1212 transitions, 38596 flow [2023-08-24 16:53:12,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 1212 transitions, 38107 flow, removed 72 selfloop flow, removed 12 redundant places. [2023-08-24 16:53:12,534 INFO L231 Difference]: Finished difference. Result has 514 places, 1131 transitions, 36150 flow [2023-08-24 16:53:12,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=33809, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1095, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=36150, PETRI_PLACES=514, PETRI_TRANSITIONS=1131} [2023-08-24 16:53:12,535 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 493 predicate places. [2023-08-24 16:53:12,535 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 1131 transitions, 36150 flow [2023-08-24 16:53:12,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 154.8) internal successors, (2322), 15 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:12,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:53:12,535 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:53:12,540 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 16:53:12,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:53:12,740 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 16:53:12,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:53:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash 92895262, now seen corresponding path program 16 times [2023-08-24 16:53:12,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:53:12,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892461356] [2023-08-24 16:53:12,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:53:12,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:53:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:53:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:53:13,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:53:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892461356] [2023-08-24 16:53:13,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892461356] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:53:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456563614] [2023-08-24 16:53:13,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:53:13,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:53:13,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:53:13,402 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 16:53:13,404 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 16:53:13,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:53:13,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:53:13,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 16:53:13,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:53:13,622 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 16:53:13,659 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 16:53:13,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:53:13,788 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 16:53:14,003 INFO L322 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2023-08-24 16:53:14,003 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 233 treesize of output 225 [2023-08-24 16:53:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:53:14,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:53:15,187 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:53:15,187 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 160 treesize of output 100 [2023-08-24 16:53:15,213 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:53:15,213 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 444 treesize of output 412 [2023-08-24 16:53:15,249 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:53:15,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 165 [2023-08-24 16:53:15,266 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:53:15,266 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 172 treesize of output 144 [2023-08-24 16:53:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:53:15,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456563614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:53:15,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:53:15,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-24 16:53:15,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925210829] [2023-08-24 16:53:15,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:53:15,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 16:53:15,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:53:15,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 16:53:15,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=744, Unknown=1, NotChecked=0, Total=870 [2023-08-24 16:53:15,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 16:53:15,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 1131 transitions, 36150 flow. Second operand has 30 states, 30 states have (on average 100.66666666666667) internal successors, (3020), 30 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:15,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:53:15,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 16:53:15,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:53:18,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:53:20,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:53:29,353 WARN L234 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:53:33,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:53:35,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:53:37,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:53:51,037 INFO L124 PetriNetUnfolderBase]: 3960/7733 cut-off events. [2023-08-24 16:53:51,037 INFO L125 PetriNetUnfolderBase]: For 348340/348340 co-relation queries the response was YES. [2023-08-24 16:53:51,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93003 conditions, 7733 events. 3960/7733 cut-off events. For 348340/348340 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 63384 event pairs, 115 based on Foata normal form. 23/7752 useless extension candidates. Maximal degree in co-relation 92663. Up to 2370 conditions per place. [2023-08-24 16:53:51,146 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 496 selfloop transitions, 1010 changer transitions 29/1535 dead transitions. [2023-08-24 16:53:51,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1535 transitions, 48993 flow [2023-08-24 16:53:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 16:53:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 16:53:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4322 transitions. [2023-08-24 16:53:51,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25524124490639577 [2023-08-24 16:53:51,150 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4322 transitions. [2023-08-24 16:53:51,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4322 transitions. [2023-08-24 16:53:51,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:53:51,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4322 transitions. [2023-08-24 16:53:51,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 105.41463414634147) internal successors, (4322), 41 states have internal predecessors, (4322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:51,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 413.0) internal successors, (17346), 42 states have internal predecessors, (17346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:51,160 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 413.0) internal successors, (17346), 42 states have internal predecessors, (17346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:51,160 INFO L175 Difference]: Start difference. First operand has 514 places, 1131 transitions, 36150 flow. Second operand 41 states and 4322 transitions. [2023-08-24 16:53:51,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1535 transitions, 48993 flow [2023-08-24 16:53:54,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 1535 transitions, 48446 flow, removed 53 selfloop flow, removed 12 redundant places. [2023-08-24 16:53:54,328 INFO L231 Difference]: Finished difference. Result has 555 places, 1352 transitions, 45965 flow [2023-08-24 16:53:54,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=35726, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=793, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=45965, PETRI_PLACES=555, PETRI_TRANSITIONS=1352} [2023-08-24 16:53:54,328 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 534 predicate places. [2023-08-24 16:53:54,329 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 1352 transitions, 45965 flow [2023-08-24 16:53:54,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 100.66666666666667) internal successors, (3020), 30 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:54,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:53:54,329 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:53:54,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-24 16:53:54,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:53:54,533 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 16:53:54,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:53:54,534 INFO L85 PathProgramCache]: Analyzing trace with hash 5103602, now seen corresponding path program 17 times [2023-08-24 16:53:54,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:53:54,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988029491] [2023-08-24 16:53:54,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:53:54,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:53:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:53:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:53:55,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:53:55,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988029491] [2023-08-24 16:53:55,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988029491] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:53:55,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391607622] [2023-08-24 16:53:55,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:53:55,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:53:55,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:53:55,344 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 16:53:55,346 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 16:53:55,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:53:55,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:53:55,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 16:53:55,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:53:55,544 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-24 16:53:55,580 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 16:53:55,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:53:55,670 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 16:53:55,881 INFO L322 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2023-08-24 16:53:55,881 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 229 treesize of output 221 [2023-08-24 16:53:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:53:55,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:53:58,063 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:53:58,063 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 163 treesize of output 103 [2023-08-24 16:53:58,105 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:53:58,106 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 440 treesize of output 482 [2023-08-24 16:53:58,150 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:53:58,150 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 226 treesize of output 246 [2023-08-24 16:53:58,193 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:53:58,193 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 197 [2023-08-24 16:53:59,090 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 16:53:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:53:59,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391607622] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:53:59,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:53:59,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-24 16:53:59,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724683065] [2023-08-24 16:53:59,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:53:59,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 16:53:59,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:53:59,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 16:53:59,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=739, Unknown=1, NotChecked=0, Total=870 [2023-08-24 16:53:59,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 16:53:59,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 1352 transitions, 45965 flow. Second operand has 30 states, 30 states have (on average 100.46666666666667) internal successors, (3014), 30 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:53:59,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:53:59,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 16:53:59,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:54:15,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:54:19,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:54:22,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:54:23,306 INFO L124 PetriNetUnfolderBase]: 4111/8008 cut-off events. [2023-08-24 16:54:23,306 INFO L125 PetriNetUnfolderBase]: For 409397/409397 co-relation queries the response was YES. [2023-08-24 16:54:23,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102277 conditions, 8008 events. 4111/8008 cut-off events. For 409397/409397 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 65343 event pairs, 382 based on Foata normal form. 8/8015 useless extension candidates. Maximal degree in co-relation 101899. Up to 6828 conditions per place. [2023-08-24 16:54:23,423 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 1211 selfloop transitions, 326 changer transitions 14/1551 dead transitions. [2023-08-24 16:54:23,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 1551 transitions, 53406 flow [2023-08-24 16:54:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 16:54:23,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 16:54:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2972 transitions. [2023-08-24 16:54:23,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2570044967139398 [2023-08-24 16:54:23,427 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2972 transitions. [2023-08-24 16:54:23,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2972 transitions. [2023-08-24 16:54:23,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:54:23,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2972 transitions. [2023-08-24 16:54:23,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 106.14285714285714) internal successors, (2972), 28 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:54:23,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 413.0) internal successors, (11977), 29 states have internal predecessors, (11977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:54:23,434 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 413.0) internal successors, (11977), 29 states have internal predecessors, (11977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:54:23,434 INFO L175 Difference]: Start difference. First operand has 555 places, 1352 transitions, 45965 flow. Second operand 28 states and 2972 transitions. [2023-08-24 16:54:23,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 1551 transitions, 53406 flow [2023-08-24 16:54:28,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 1551 transitions, 52324 flow, removed 281 selfloop flow, removed 17 redundant places. [2023-08-24 16:54:28,040 INFO L231 Difference]: Finished difference. Result has 572 places, 1425 transitions, 48549 flow [2023-08-24 16:54:28,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=45006, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1031, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=48549, PETRI_PLACES=572, PETRI_TRANSITIONS=1425} [2023-08-24 16:54:28,049 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 551 predicate places. [2023-08-24 16:54:28,049 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 1425 transitions, 48549 flow [2023-08-24 16:54:28,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 100.46666666666667) internal successors, (3014), 30 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:54:28,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:54:28,050 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:54:28,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-24 16:54:28,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:54:28,252 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 16:54:28,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:54:28,252 INFO L85 PathProgramCache]: Analyzing trace with hash -856149512, now seen corresponding path program 18 times [2023-08-24 16:54:28,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:54:28,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124171992] [2023-08-24 16:54:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:54:28,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:54:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:54:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:54:29,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:54:29,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124171992] [2023-08-24 16:54:29,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124171992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:54:29,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372844025] [2023-08-24 16:54:29,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:54:29,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:54:29,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:54:29,014 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 16:54:29,015 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 16:54:29,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 16:54:29,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:54:29,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 16:54:29,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:54:29,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:54:29,283 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 16:54:29,507 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:54:29,507 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 34 treesize of output 23 [2023-08-24 16:54:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:54:29,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:54:30,322 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:54:30,322 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 103 treesize of output 135 [2023-08-24 16:54:30,340 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:54:30,340 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 39 treesize of output 55 [2023-08-24 16:54:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:54:30,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372844025] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:54:30,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:54:30,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-08-24 16:54:30,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934126261] [2023-08-24 16:54:30,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:54:30,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 16:54:30,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:54:30,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 16:54:30,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=685, Unknown=1, NotChecked=0, Total=812 [2023-08-24 16:54:30,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 16:54:30,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 1425 transitions, 48549 flow. Second operand has 29 states, 29 states have (on average 100.55172413793103) internal successors, (2916), 29 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:54:30,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:54:30,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 16:54:30,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:54:41,050 WARN L234 SmtUtils]: Spent 10.18s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:54:43,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:54:54,599 WARN L234 SmtUtils]: Spent 10.38s on a formula simplification. DAG size of input: 71 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:55:09,631 WARN L234 SmtUtils]: Spent 8.36s on a formula simplification. DAG size of input: 77 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:55:25,631 WARN L234 SmtUtils]: Spent 14.34s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:55:34,630 WARN L234 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 78 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:55:39,200 INFO L124 PetriNetUnfolderBase]: 4170/8137 cut-off events. [2023-08-24 16:55:39,200 INFO L125 PetriNetUnfolderBase]: For 401884/401884 co-relation queries the response was YES. [2023-08-24 16:55:39,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104000 conditions, 8137 events. 4170/8137 cut-off events. For 401884/401884 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 67171 event pairs, 60 based on Foata normal form. 18/8154 useless extension candidates. Maximal degree in co-relation 103616. Up to 2037 conditions per place. [2023-08-24 16:55:39,320 INFO L140 encePairwiseOnDemand]: 401/413 looper letters, 312 selfloop transitions, 1256 changer transitions 21/1589 dead transitions. [2023-08-24 16:55:39,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 1589 transitions, 54162 flow [2023-08-24 16:55:39,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 16:55:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 16:55:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4715 transitions. [2023-08-24 16:55:39,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2536992198009147 [2023-08-24 16:55:39,323 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4715 transitions. [2023-08-24 16:55:39,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4715 transitions. [2023-08-24 16:55:39,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:55:39,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4715 transitions. [2023-08-24 16:55:39,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 104.77777777777777) internal successors, (4715), 45 states have internal predecessors, (4715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:39,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 413.0) internal successors, (18998), 46 states have internal predecessors, (18998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:39,334 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 413.0) internal successors, (18998), 46 states have internal predecessors, (18998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:39,334 INFO L175 Difference]: Start difference. First operand has 572 places, 1425 transitions, 48549 flow. Second operand 45 states and 4715 transitions. [2023-08-24 16:55:39,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 1589 transitions, 54162 flow [2023-08-24 16:55:44,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 1589 transitions, 53482 flow, removed 71 selfloop flow, removed 13 redundant places. [2023-08-24 16:55:44,320 INFO L231 Difference]: Finished difference. Result has 612 places, 1470 transitions, 52943 flow [2023-08-24 16:55:44,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=47837, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=52943, PETRI_PLACES=612, PETRI_TRANSITIONS=1470} [2023-08-24 16:55:44,321 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 591 predicate places. [2023-08-24 16:55:44,321 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 1470 transitions, 52943 flow [2023-08-24 16:55:44,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 100.55172413793103) internal successors, (2916), 29 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:44,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:55:44,321 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 16:55:44,326 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 16:55:44,526 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,SelfDestructingSolverStorable36 [2023-08-24 16:55:44,526 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 16:55:44,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:55:44,526 INFO L85 PathProgramCache]: Analyzing trace with hash 235652983, now seen corresponding path program 1 times [2023-08-24 16:55:44,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:55:44,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037865464] [2023-08-24 16:55:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:55:44,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:55:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:55:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:55:44,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:55:44,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037865464] [2023-08-24 16:55:44,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037865464] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:55:44,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797792340] [2023-08-24 16:55:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:55:44,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:55:44,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:55:44,633 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 16:55:44,635 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 16:55:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:55:44,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 16:55:44,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:55:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:55:44,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:55:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 16:55:44,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797792340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:55:44,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:55:44,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-24 16:55:44,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113646464] [2023-08-24 16:55:44,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:55:44,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 16:55:44,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:55:44,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 16:55:44,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-24 16:55:44,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:55:44,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 1470 transitions, 52943 flow. Second operand has 13 states, 13 states have (on average 155.23076923076923) internal successors, (2018), 13 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:44,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:55:44,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:55:44,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:55:49,685 INFO L124 PetriNetUnfolderBase]: 3777/7502 cut-off events. [2023-08-24 16:55:49,685 INFO L125 PetriNetUnfolderBase]: For 441522/441522 co-relation queries the response was YES. [2023-08-24 16:55:49,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99872 conditions, 7502 events. 3777/7502 cut-off events. For 441522/441522 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 62187 event pairs, 390 based on Foata normal form. 248/7749 useless extension candidates. Maximal degree in co-relation 99468. Up to 1791 conditions per place. [2023-08-24 16:55:49,794 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 853 selfloop transitions, 688 changer transitions 39/1580 dead transitions. [2023-08-24 16:55:49,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 1580 transitions, 57682 flow [2023-08-24 16:55:49,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 16:55:49,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 16:55:49,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2392 transitions. [2023-08-24 16:55:49,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861178369652946 [2023-08-24 16:55:49,796 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2392 transitions. [2023-08-24 16:55:49,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2392 transitions. [2023-08-24 16:55:49,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:55:49,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2392 transitions. [2023-08-24 16:55:49,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 159.46666666666667) internal successors, (2392), 15 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:49,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:49,800 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:49,800 INFO L175 Difference]: Start difference. First operand has 612 places, 1470 transitions, 52943 flow. Second operand 15 states and 2392 transitions. [2023-08-24 16:55:49,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 1580 transitions, 57682 flow [2023-08-24 16:55:54,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 1580 transitions, 56629 flow, removed 266 selfloop flow, removed 27 redundant places. [2023-08-24 16:55:54,341 INFO L231 Difference]: Finished difference. Result has 597 places, 1459 transitions, 52717 flow [2023-08-24 16:55:54,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=49565, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=625, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=774, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=52717, PETRI_PLACES=597, PETRI_TRANSITIONS=1459} [2023-08-24 16:55:54,342 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 576 predicate places. [2023-08-24 16:55:54,342 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 1459 transitions, 52717 flow [2023-08-24 16:55:54,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.23076923076923) internal successors, (2018), 13 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:54,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:55:54,343 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 16:55:54,348 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 16:55:54,548 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,SelfDestructingSolverStorable37 [2023-08-24 16:55:54,548 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 16:55:54,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:55:54,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1205295773, now seen corresponding path program 2 times [2023-08-24 16:55:54,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:55:54,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690228645] [2023-08-24 16:55:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:55:54,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:55:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:55:54,770 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 16:55:54,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:55:54,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690228645] [2023-08-24 16:55:54,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690228645] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:55:54,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735981265] [2023-08-24 16:55:54,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:55:54,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:55:54,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:55:54,771 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 16:55:54,773 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 16:55:54,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:55:54,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:55:54,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-24 16:55:54,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:55:55,031 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 16:55:55,060 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 16:55:55,097 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 16:55:55,124 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 16:55:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:55:55,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:55:58,170 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 16:55:58,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735981265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:55:58,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:55:58,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 25 [2023-08-24 16:55:58,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372614354] [2023-08-24 16:55:58,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:55:58,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 16:55:58,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:55:58,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 16:55:58,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-08-24 16:55:58,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 413 [2023-08-24 16:55:58,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 1459 transitions, 52717 flow. Second operand has 25 states, 25 states have (on average 80.84) internal successors, (2021), 25 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:58,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:55:58,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 413 [2023-08-24 16:55:58,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:56:50,674 INFO L124 PetriNetUnfolderBase]: 4204/8241 cut-off events. [2023-08-24 16:56:50,674 INFO L125 PetriNetUnfolderBase]: For 461932/461932 co-relation queries the response was YES. [2023-08-24 16:56:50,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112118 conditions, 8241 events. 4204/8241 cut-off events. For 461932/461932 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 68808 event pairs, 184 based on Foata normal form. 30/8270 useless extension candidates. Maximal degree in co-relation 111954. Up to 2341 conditions per place. [2023-08-24 16:56:50,797 INFO L140 encePairwiseOnDemand]: 401/413 looper letters, 875 selfloop transitions, 1034 changer transitions 47/1956 dead transitions. [2023-08-24 16:56:50,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 1956 transitions, 67023 flow [2023-08-24 16:56:50,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-08-24 16:56:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-08-24 16:56:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 6560 transitions. [2023-08-24 16:56:50,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20628282129492784 [2023-08-24 16:56:50,802 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 6560 transitions. [2023-08-24 16:56:50,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 6560 transitions. [2023-08-24 16:56:50,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:56:50,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 6560 transitions. [2023-08-24 16:56:50,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 85.1948051948052) internal successors, (6560), 77 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:56:50,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 413.0) internal successors, (32214), 78 states have internal predecessors, (32214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:56:50,820 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 413.0) internal successors, (32214), 78 states have internal predecessors, (32214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:56:50,820 INFO L175 Difference]: Start difference. First operand has 597 places, 1459 transitions, 52717 flow. Second operand 77 states and 6560 transitions. [2023-08-24 16:56:50,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 1956 transitions, 67023 flow [2023-08-24 16:56:56,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 1956 transitions, 65700 flow, removed 313 selfloop flow, removed 9 redundant places. [2023-08-24 16:56:56,368 INFO L231 Difference]: Finished difference. Result has 685 places, 1661 transitions, 62055 flow [2023-08-24 16:56:56,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=51639, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=862, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=62055, PETRI_PLACES=685, PETRI_TRANSITIONS=1661} [2023-08-24 16:56:56,369 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 664 predicate places. [2023-08-24 16:56:56,369 INFO L495 AbstractCegarLoop]: Abstraction has has 685 places, 1661 transitions, 62055 flow [2023-08-24 16:56:56,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 80.84) internal successors, (2021), 25 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:56:56,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:56:56,370 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 16:56:56,377 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 16:56:56,577 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,SelfDestructingSolverStorable38 [2023-08-24 16:56:56,578 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 16:56:56,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:56:56,578 INFO L85 PathProgramCache]: Analyzing trace with hash -704623283, now seen corresponding path program 3 times [2023-08-24 16:56:56,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:56:56,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80231521] [2023-08-24 16:56:56,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:56:56,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:56:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:56:56,827 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 16:56:56,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:56:56,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80231521] [2023-08-24 16:56:56,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80231521] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:56:56,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980206680] [2023-08-24 16:56:56,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:56:56,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:56:56,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:56:56,828 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 16:56:56,830 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 16:56:57,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 16:56:57,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:56:57,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-24 16:56:57,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:56:57,075 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 16:56:57,102 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 16:56:57,140 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 16:56:57,171 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 16:56:57,638 INFO L322 Elim1Store]: treesize reduction 54, result has 37.9 percent of original size [2023-08-24 16:56:57,639 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 489 treesize of output 288 [2023-08-24 16:56:58,088 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 16:56:58,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:57:00,183 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 16:57:00,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980206680] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:57:00,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:57:00,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 26 [2023-08-24 16:57:00,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843203969] [2023-08-24 16:57:00,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:57:00,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 16:57:00,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:57:00,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 16:57:00,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2023-08-24 16:57:00,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 413 [2023-08-24 16:57:00,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 1661 transitions, 62055 flow. Second operand has 26 states, 26 states have (on average 80.6923076923077) internal successors, (2098), 26 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:57:00,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:57:00,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 413 [2023-08-24 16:57:00,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:57:21,091 INFO L124 PetriNetUnfolderBase]: 4320/8442 cut-off events. [2023-08-24 16:57:21,092 INFO L125 PetriNetUnfolderBase]: For 487212/487212 co-relation queries the response was YES. [2023-08-24 16:57:21,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118391 conditions, 8442 events. 4320/8442 cut-off events. For 487212/487212 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 70400 event pairs, 186 based on Foata normal form. 19/8460 useless extension candidates. Maximal degree in co-relation 118207. Up to 2771 conditions per place. [2023-08-24 16:57:21,234 INFO L140 encePairwiseOnDemand]: 401/413 looper letters, 848 selfloop transitions, 1053 changer transitions 10/1911 dead transitions. [2023-08-24 16:57:21,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 731 places, 1911 transitions, 70760 flow [2023-08-24 16:57:21,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-24 16:57:21,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-24 16:57:21,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4353 transitions. [2023-08-24 16:57:21,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20666571713431134 [2023-08-24 16:57:21,251 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4353 transitions. [2023-08-24 16:57:21,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4353 transitions. [2023-08-24 16:57:21,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:57:21,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4353 transitions. [2023-08-24 16:57:21,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 85.3529411764706) internal successors, (4353), 51 states have internal predecessors, (4353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:57:21,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 413.0) internal successors, (21476), 52 states have internal predecessors, (21476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:57:21,271 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 413.0) internal successors, (21476), 52 states have internal predecessors, (21476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:57:21,271 INFO L175 Difference]: Start difference. First operand has 685 places, 1661 transitions, 62055 flow. Second operand 51 states and 4353 transitions. [2023-08-24 16:57:21,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 731 places, 1911 transitions, 70760 flow [2023-08-24 16:57:27,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 1911 transitions, 69199 flow, removed 536 selfloop flow, removed 33 redundant places. [2023-08-24 16:57:27,803 INFO L231 Difference]: Finished difference. Result has 709 places, 1749 transitions, 67223 flow [2023-08-24 16:57:27,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=60798, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=965, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=67223, PETRI_PLACES=709, PETRI_TRANSITIONS=1749} [2023-08-24 16:57:27,806 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 688 predicate places. [2023-08-24 16:57:27,806 INFO L495 AbstractCegarLoop]: Abstraction has has 709 places, 1749 transitions, 67223 flow [2023-08-24 16:57:27,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 80.6923076923077) internal successors, (2098), 26 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:57:27,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:57:27,807 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 16:57:27,812 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 16:57:28,012 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,SelfDestructingSolverStorable39 [2023-08-24 16:57:28,012 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 16:57:28,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:57:28,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1633721764, now seen corresponding path program 4 times [2023-08-24 16:57:28,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:57:28,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788891166] [2023-08-24 16:57:28,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:57:28,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:57:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:57:28,195 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 16:57:28,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:57:28,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788891166] [2023-08-24 16:57:28,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788891166] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:57:28,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110743985] [2023-08-24 16:57:28,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:57:28,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:57:28,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:57:28,196 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 16:57:28,197 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 16:57:28,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:57:28,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:57:28,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-24 16:57:28,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:57:28,461 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 16:57:28,488 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 16:57:28,522 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 16:57:29,028 INFO L322 Elim1Store]: treesize reduction 236, result has 0.4 percent of original size [2023-08-24 16:57:29,029 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 699 treesize of output 271 [2023-08-24 16:57:29,090 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 16:57:29,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:57:32,259 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 16:57:32,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110743985] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:57:32,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:57:32,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 26 [2023-08-24 16:57:32,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299898024] [2023-08-24 16:57:32,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:57:32,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 16:57:32,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:57:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 16:57:32,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2023-08-24 16:57:32,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 413 [2023-08-24 16:57:32,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 1749 transitions, 67223 flow. Second operand has 26 states, 26 states have (on average 80.76923076923077) internal successors, (2100), 26 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:57:32,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:57:32,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 413 [2023-08-24 16:57:32,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:57:36,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:57:40,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:57:45,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:57:57,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:58:02,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:58:08,494 INFO L124 PetriNetUnfolderBase]: 4433/8644 cut-off events. [2023-08-24 16:58:08,494 INFO L125 PetriNetUnfolderBase]: For 523384/523384 co-relation queries the response was YES. [2023-08-24 16:58:08,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123654 conditions, 8644 events. 4433/8644 cut-off events. For 523384/523384 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 72275 event pairs, 202 based on Foata normal form. 17/8660 useless extension candidates. Maximal degree in co-relation 123465. Up to 2994 conditions per place. [2023-08-24 16:58:08,636 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 844 selfloop transitions, 1134 changer transitions 13/1991 dead transitions. [2023-08-24 16:58:08,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 1991 transitions, 75251 flow [2023-08-24 16:58:08,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-24 16:58:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-24 16:58:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4074 transitions. [2023-08-24 16:58:08,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2055084745762712 [2023-08-24 16:58:08,640 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4074 transitions. [2023-08-24 16:58:08,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4074 transitions. [2023-08-24 16:58:08,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:58:08,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4074 transitions. [2023-08-24 16:58:08,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 84.875) internal successors, (4074), 48 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:08,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 413.0) internal successors, (20237), 49 states have internal predecessors, (20237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:08,664 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 413.0) internal successors, (20237), 49 states have internal predecessors, (20237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:08,664 INFO L175 Difference]: Start difference. First operand has 709 places, 1749 transitions, 67223 flow. Second operand 48 states and 4074 transitions. [2023-08-24 16:58:08,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 1991 transitions, 75251 flow [2023-08-24 16:58:16,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 729 places, 1991 transitions, 73999 flow, removed 149 selfloop flow, removed 26 redundant places. [2023-08-24 16:58:16,145 INFO L231 Difference]: Finished difference. Result has 742 places, 1816 transitions, 71972 flow [2023-08-24 16:58:16,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=66044, PETRI_DIFFERENCE_MINUEND_PLACES=682, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=71972, PETRI_PLACES=742, PETRI_TRANSITIONS=1816} [2023-08-24 16:58:16,156 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 721 predicate places. [2023-08-24 16:58:16,156 INFO L495 AbstractCegarLoop]: Abstraction has has 742 places, 1816 transitions, 71972 flow [2023-08-24 16:58:16,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 80.76923076923077) internal successors, (2100), 26 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:16,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:58:16,156 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 16:58:16,162 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 16:58:16,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:58:16,361 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 16:58:16,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:58:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1662878432, now seen corresponding path program 5 times [2023-08-24 16:58:16,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:58:16,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24255045] [2023-08-24 16:58:16,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:58:16,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:58:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:58:16,623 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 16:58:16,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:58:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24255045] [2023-08-24 16:58:16,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24255045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:58:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298859590] [2023-08-24 16:58:16,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:58:16,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:58:16,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:58:16,624 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 16:58:16,626 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 16:58:16,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:58:16,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:58:16,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 16:58:16,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:58:17,015 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 16:58:17,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:58:17,103 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-24 16:58:17,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 16:58:17,426 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 16:58:17,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298859590] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:58:17,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:58:17,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-24 16:58:17,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523045877] [2023-08-24 16:58:17,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:58:17,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 16:58:17,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:58:17,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 16:58:17,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-08-24 16:58:17,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:58:17,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 742 places, 1816 transitions, 71972 flow. Second operand has 19 states, 19 states have (on average 154.8421052631579) internal successors, (2942), 19 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:17,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:58:17,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:58:17,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:58:21,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:58:28,507 INFO L124 PetriNetUnfolderBase]: 4590/8984 cut-off events. [2023-08-24 16:58:28,507 INFO L125 PetriNetUnfolderBase]: For 584559/584559 co-relation queries the response was YES. [2023-08-24 16:58:28,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131522 conditions, 8984 events. 4590/8984 cut-off events. For 584559/584559 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 75747 event pairs, 366 based on Foata normal form. 40/9023 useless extension candidates. Maximal degree in co-relation 131325. Up to 2143 conditions per place. [2023-08-24 16:58:28,667 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 920 selfloop transitions, 1099 changer transitions 0/2019 dead transitions. [2023-08-24 16:58:28,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 2019 transitions, 80193 flow [2023-08-24 16:58:28,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 16:58:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 16:58:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4783 transitions. [2023-08-24 16:58:28,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3860371267150928 [2023-08-24 16:58:28,671 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4783 transitions. [2023-08-24 16:58:28,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4783 transitions. [2023-08-24 16:58:28,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:58:28,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4783 transitions. [2023-08-24 16:58:28,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 159.43333333333334) internal successors, (4783), 30 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:28,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 413.0) internal successors, (12803), 31 states have internal predecessors, (12803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:28,680 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 413.0) internal successors, (12803), 31 states have internal predecessors, (12803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:28,680 INFO L175 Difference]: Start difference. First operand has 742 places, 1816 transitions, 71972 flow. Second operand 30 states and 4783 transitions. [2023-08-24 16:58:28,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 770 places, 2019 transitions, 80193 flow [2023-08-24 16:58:37,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 751 places, 2019 transitions, 79628 flow, removed 159 selfloop flow, removed 19 redundant places. [2023-08-24 16:58:37,313 INFO L231 Difference]: Finished difference. Result has 759 places, 1877 transitions, 76940 flow [2023-08-24 16:58:37,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=71275, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1036, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=76940, PETRI_PLACES=759, PETRI_TRANSITIONS=1877} [2023-08-24 16:58:37,329 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 738 predicate places. [2023-08-24 16:58:37,330 INFO L495 AbstractCegarLoop]: Abstraction has has 759 places, 1877 transitions, 76940 flow [2023-08-24 16:58:37,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 154.8421052631579) internal successors, (2942), 19 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:37,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:58:37,330 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 16:58:37,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-24 16:58:37,535 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,SelfDestructingSolverStorable41 [2023-08-24 16:58:37,535 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 16:58:37,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:58:37,536 INFO L85 PathProgramCache]: Analyzing trace with hash 767755593, now seen corresponding path program 6 times [2023-08-24 16:58:37,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:58:37,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640500877] [2023-08-24 16:58:37,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:58:37,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:58:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:58:37,764 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 16:58:37,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:58:37,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640500877] [2023-08-24 16:58:37,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640500877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:58:37,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683637152] [2023-08-24 16:58:37,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:58:37,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:58:37,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:58:37,766 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 16:58:37,768 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 16:58:37,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 16:58:37,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:58:37,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 16:58:37,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:58:38,210 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 16:58:38,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:58:38,339 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 16:58:38,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-24 16:58:38,618 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 16:58:38,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683637152] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:58:38,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:58:38,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-24 16:58:38,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764735173] [2023-08-24 16:58:38,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:58:38,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 16:58:38,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:58:38,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 16:58:38,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-08-24 16:58:38,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:58:38,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 759 places, 1877 transitions, 76940 flow. Second operand has 17 states, 17 states have (on average 154.94117647058823) internal successors, (2634), 17 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 16:58:38,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:58:38,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:58:38,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:58:47,780 INFO L124 PetriNetUnfolderBase]: 4831/9593 cut-off events. [2023-08-24 16:58:47,780 INFO L125 PetriNetUnfolderBase]: For 664480/664480 co-relation queries the response was YES. [2023-08-24 16:58:47,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142073 conditions, 9593 events. 4831/9593 cut-off events. For 664480/664480 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 82738 event pairs, 771 based on Foata normal form. 44/9636 useless extension candidates. Maximal degree in co-relation 141870. Up to 4341 conditions per place. [2023-08-24 16:58:47,967 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 1118 selfloop transitions, 983 changer transitions 10/2111 dead transitions. [2023-08-24 16:58:47,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 798 places, 2111 transitions, 86197 flow [2023-08-24 16:58:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 16:58:47,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 16:58:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6356 transitions. [2023-08-24 16:58:47,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3847457627118644 [2023-08-24 16:58:47,972 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6356 transitions. [2023-08-24 16:58:47,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6356 transitions. [2023-08-24 16:58:47,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:58:47,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6356 transitions. [2023-08-24 16:58:47,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 158.9) internal successors, (6356), 40 states have internal predecessors, (6356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:47,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 413.0) internal successors, (16933), 41 states have internal predecessors, (16933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:47,986 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 413.0) internal successors, (16933), 41 states have internal predecessors, (16933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:47,986 INFO L175 Difference]: Start difference. First operand has 759 places, 1877 transitions, 76940 flow. Second operand 40 states and 6356 transitions. [2023-08-24 16:58:47,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 798 places, 2111 transitions, 86197 flow [2023-08-24 16:58:57,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 2111 transitions, 84964 flow, removed 59 selfloop flow, removed 14 redundant places. [2023-08-24 16:58:57,979 INFO L231 Difference]: Finished difference. Result has 793 places, 1961 transitions, 82582 flow [2023-08-24 16:58:57,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=75495, PETRI_DIFFERENCE_MINUEND_PLACES=745, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=893, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=939, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=82582, PETRI_PLACES=793, PETRI_TRANSITIONS=1961} [2023-08-24 16:58:57,981 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 772 predicate places. [2023-08-24 16:58:57,981 INFO L495 AbstractCegarLoop]: Abstraction has has 793 places, 1961 transitions, 82582 flow [2023-08-24 16:58:57,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 154.94117647058823) internal successors, (2634), 17 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 16:58:57,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:58:57,981 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 16:58:57,986 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 16:58:58,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:58:58,186 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 16:58:58,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:58:58,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1142163463, now seen corresponding path program 7 times [2023-08-24 16:58:58,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:58:58,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528510669] [2023-08-24 16:58:58,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:58:58,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:58:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:58:58,349 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 16:58:58,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:58:58,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528510669] [2023-08-24 16:58:58,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528510669] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:58:58,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123338146] [2023-08-24 16:58:58,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 16:58:58,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:58:58,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:58:58,361 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 16:58:58,363 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 16:58:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:58:58,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 16:58:58,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:58:58,695 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2023-08-24 16:58:58,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 92 [2023-08-24 16:58:58,778 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 16:58:58,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:58:58,944 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 16:58:59,033 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-24 16:58:59,238 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 16:58:59,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123338146] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:58:59,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:58:59,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 16:58:59,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251349202] [2023-08-24 16:58:59,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:58:59,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:58:59,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:58:59,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:58:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:58:59,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 16:58:59,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 793 places, 1961 transitions, 82582 flow. Second operand has 18 states, 18 states have (on average 154.66666666666666) internal successors, (2784), 18 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:59,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:58:59,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 16:58:59,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:59:08,144 INFO L124 PetriNetUnfolderBase]: 4833/9495 cut-off events. [2023-08-24 16:59:08,144 INFO L125 PetriNetUnfolderBase]: For 684393/684393 co-relation queries the response was YES. [2023-08-24 16:59:08,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144618 conditions, 9495 events. 4833/9495 cut-off events. For 684393/684393 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 80865 event pairs, 1204 based on Foata normal form. 50/9544 useless extension candidates. Maximal degree in co-relation 144409. Up to 6124 conditions per place. [2023-08-24 16:59:08,311 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 1643 selfloop transitions, 426 changer transitions 0/2069 dead transitions. [2023-08-24 16:59:08,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 821 places, 2069 transitions, 88007 flow [2023-08-24 16:59:08,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 16:59:08,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 16:59:08,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 5236 transitions. [2023-08-24 16:59:08,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384180790960452 [2023-08-24 16:59:08,314 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 5236 transitions. [2023-08-24 16:59:08,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 5236 transitions. [2023-08-24 16:59:08,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:59:08,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 5236 transitions. [2023-08-24 16:59:08,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 158.66666666666666) internal successors, (5236), 33 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:59:08,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 413.0) internal successors, (14042), 34 states have internal predecessors, (14042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:59:08,323 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 413.0) internal successors, (14042), 34 states have internal predecessors, (14042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:59:08,323 INFO L175 Difference]: Start difference. First operand has 793 places, 1961 transitions, 82582 flow. Second operand 33 states and 5236 transitions. [2023-08-24 16:59:08,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 821 places, 2069 transitions, 88007 flow [2023-08-24 16:59:19,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 806 places, 2069 transitions, 87139 flow, removed 165 selfloop flow, removed 15 redundant places. [2023-08-24 16:59:19,296 INFO L231 Difference]: Finished difference. Result has 810 places, 1974 transitions, 83270 flow [2023-08-24 16:59:19,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=81341, PETRI_DIFFERENCE_MINUEND_PLACES=774, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=83270, PETRI_PLACES=810, PETRI_TRANSITIONS=1974} [2023-08-24 16:59:19,298 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 789 predicate places. [2023-08-24 16:59:19,298 INFO L495 AbstractCegarLoop]: Abstraction has has 810 places, 1974 transitions, 83270 flow [2023-08-24 16:59:19,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 154.66666666666666) internal successors, (2784), 18 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:59:19,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:59:19,298 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 16:59:19,305 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 16:59:19,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:59:19,504 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 16:59:19,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:59:19,504 INFO L85 PathProgramCache]: Analyzing trace with hash -921628186, now seen corresponding path program 8 times [2023-08-24 16:59:19,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:59:19,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275680249] [2023-08-24 16:59:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:59:19,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:59:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:59:19,687 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 16:59:19,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:59:19,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275680249] [2023-08-24 16:59:19,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275680249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:59:19,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10539341] [2023-08-24 16:59:19,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:59:19,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:59:19,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:59:19,688 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 16:59:19,691 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 16:59:19,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:59:19,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:59:19,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-24 16:59:19,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:59:19,972 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 16:59:20,011 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 16:59:20,040 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 16:59:20,641 INFO L322 Elim1Store]: treesize reduction 236, result has 0.4 percent of original size [2023-08-24 16:59:20,642 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 695 treesize of output 267 [2023-08-24 16:59:20,691 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 16:59:20,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:59:24,519 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 16:59:24,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10539341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:59:24,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:59:24,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 26 [2023-08-24 16:59:24,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53138743] [2023-08-24 16:59:24,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:59:24,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 16:59:24,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:59:24,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 16:59:24,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2023-08-24 16:59:24,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 413 [2023-08-24 16:59:24,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 810 places, 1974 transitions, 83270 flow. Second operand has 26 states, 26 states have (on average 80.76923076923077) internal successors, (2100), 26 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:59:24,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:59:24,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 413 [2023-08-24 16:59:24,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:59:54,375 WARN L234 SmtUtils]: Spent 16.45s on a formula simplification. DAG size of input: 192 DAG size of output: 192 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:00:15,487 WARN L234 SmtUtils]: Spent 9.49s on a formula simplification. DAG size of input: 204 DAG size of output: 203 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:00:18,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:00:40,866 WARN L234 SmtUtils]: Spent 15.91s on a formula simplification. DAG size of input: 213 DAG size of output: 203 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:00:42,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:01:00,433 WARN L234 SmtUtils]: Spent 8.47s on a formula simplification. DAG size of input: 195 DAG size of output: 170 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:01:02,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:01:05,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:01:07,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:01:14,169 WARN L234 SmtUtils]: Spent 6.37s on a formula simplification. DAG size of input: 118 DAG size of output: 118 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:01:40,657 WARN L234 SmtUtils]: Spent 19.95s on a formula simplification. DAG size of input: 225 DAG size of output: 199 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:01:46,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:01:49,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:02:12,685 WARN L234 SmtUtils]: Spent 18.72s on a formula simplification. DAG size of input: 212 DAG size of output: 202 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:02:15,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:02:17,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:02:20,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:02:28,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:02:32,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:02:38,279 INFO L124 PetriNetUnfolderBase]: 5042/9854 cut-off events. [2023-08-24 17:02:38,279 INFO L125 PetriNetUnfolderBase]: For 694632/694632 co-relation queries the response was YES. [2023-08-24 17:02:38,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150700 conditions, 9854 events. 5042/9854 cut-off events. For 694632/694632 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 83899 event pairs, 653 based on Foata normal form. 16/9869 useless extension candidates. Maximal degree in co-relation 150487. Up to 8226 conditions per place. [2023-08-24 17:02:38,455 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 1865 selfloop transitions, 321 changer transitions 27/2213 dead transitions. [2023-08-24 17:02:38,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 867 places, 2213 transitions, 91853 flow [2023-08-24 17:02:38,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-24 17:02:38,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-24 17:02:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4896 transitions. [2023-08-24 17:02:38,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20439175085580696 [2023-08-24 17:02:38,460 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4896 transitions. [2023-08-24 17:02:38,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4896 transitions. [2023-08-24 17:02:38,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 17:02:38,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4896 transitions. [2023-08-24 17:02:38,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 84.41379310344827) internal successors, (4896), 58 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:02:38,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 413.0) internal successors, (24367), 59 states have internal predecessors, (24367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:02:38,473 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 413.0) internal successors, (24367), 59 states have internal predecessors, (24367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:02:38,473 INFO L175 Difference]: Start difference. First operand has 810 places, 1974 transitions, 83270 flow. Second operand 58 states and 4896 transitions. [2023-08-24 17:02:38,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 867 places, 2213 transitions, 91853 flow [2023-08-24 17:02:49,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 846 places, 2213 transitions, 90394 flow, removed 71 selfloop flow, removed 21 redundant places. [2023-08-24 17:02:49,802 INFO L231 Difference]: Finished difference. Result has 862 places, 2042 transitions, 85620 flow [2023-08-24 17:02:49,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=81797, PETRI_DIFFERENCE_MINUEND_PLACES=789, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1973, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=85620, PETRI_PLACES=862, PETRI_TRANSITIONS=2042} [2023-08-24 17:02:49,803 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 841 predicate places. [2023-08-24 17:02:49,803 INFO L495 AbstractCegarLoop]: Abstraction has has 862 places, 2042 transitions, 85620 flow [2023-08-24 17:02:49,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 80.76923076923077) internal successors, (2100), 26 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:02:49,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 17:02:49,804 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 17:02:49,809 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 17:02:50,009 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,SelfDestructingSolverStorable44 [2023-08-24 17:02:50,009 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 17:02:50,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 17:02:50,009 INFO L85 PathProgramCache]: Analyzing trace with hash 569889532, now seen corresponding path program 19 times [2023-08-24 17:02:50,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 17:02:50,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713227242] [2023-08-24 17:02:50,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 17:02:50,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 17:02:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 17:02:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 17:02:50,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 17:02:50,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713227242] [2023-08-24 17:02:50,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713227242] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 17:02:50,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671480001] [2023-08-24 17:02:50,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 17:02:50,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 17:02:50,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 17:02:50,135 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 17:02:50,137 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 17:02:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 17:02:50,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-24 17:02:50,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 17:02:50,375 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 17:02:50,398 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 17:02:50,428 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 17:02:50,453 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 17:02:50,773 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-08-24 17:02:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 17:02:50,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 17:02:52,381 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 17:02:52,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671480001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 17:02:52,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 17:02:52,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 7] total 23 [2023-08-24 17:02:52,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652912057] [2023-08-24 17:02:52,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 17:02:52,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 17:02:52,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 17:02:52,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 17:02:52,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-08-24 17:02:52,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 17:02:52,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 862 places, 2042 transitions, 85620 flow. Second operand has 23 states, 23 states have (on average 100.8695652173913) internal successors, (2320), 23 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 17:02:52,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 17:02:52,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 17:02:52,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 17:02:58,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Received shutdown request... [2023-08-24 17:03:02,925 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 17:03:02,925 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 17:03:03,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 17:03:03,012 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 17:03:03,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-08-24 17:03:03,217 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,SelfDestructingSolverStorable45 [2023-08-24 17:03:03,217 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (23states, 99/413 universal loopers) in iteration 46,while PetriNetUnfolder was constructing finite prefix that currently has 124618 conditions, 7877 events (4333/7876 cut-off events. For 561525/561525 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 64973 event pairs, 326 based on Foata normal form. 4/8305 useless extension candidates. Maximal degree in co-relation 124389. Up to 3171 conditions per place.). [2023-08-24 17:03:03,219 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 17:03:03,219 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 17:03:03,219 INFO L445 BasicCegarLoop]: Path program histogram: [19, 12, 8, 6, 1] [2023-08-24 17:03:03,221 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 17:03:03,221 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 17:03:03,223 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 05:03:03 BasicIcfg [2023-08-24 17:03:03,224 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 17:03:03,224 INFO L158 Benchmark]: Toolchain (without parser) took 853563.65ms. Allocated memory was 312.5MB in the beginning and 4.7GB in the end (delta: 4.4GB). Free memory was 289.0MB in the beginning and 2.8GB in the end (delta: -2.5GB). Peak memory consumption was 3.1GB. Max. memory is 16.0GB. [2023-08-24 17:03:03,224 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 312.5MB. Free memory is still 288.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 17:03:03,224 INFO L158 Benchmark]: CACSL2BoogieTranslator took 231.73ms. Allocated memory is still 312.5MB. Free memory was 288.8MB in the beginning and 276.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 17:03:03,224 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.14ms. Allocated memory is still 312.5MB. Free memory was 276.2MB in the beginning and 274.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 17:03:03,224 INFO L158 Benchmark]: Boogie Preprocessor took 31.46ms. Allocated memory is still 312.5MB. Free memory was 274.1MB in the beginning and 272.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 17:03:03,224 INFO L158 Benchmark]: RCFGBuilder took 382.41ms. Allocated memory is still 312.5MB. Free memory was 272.0MB in the beginning and 253.6MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-24 17:03:03,224 INFO L158 Benchmark]: TraceAbstraction took 852871.94ms. Allocated memory was 312.5MB in the beginning and 4.7GB in the end (delta: 4.4GB). Free memory was 253.1MB in the beginning and 2.8GB in the end (delta: -2.6GB). Peak memory consumption was 3.1GB. Max. memory is 16.0GB. [2023-08-24 17:03:03,225 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 312.5MB. Free memory is still 288.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 231.73ms. Allocated memory is still 312.5MB. Free memory was 288.8MB in the beginning and 276.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 42.14ms. Allocated memory is still 312.5MB. Free memory was 276.2MB in the beginning and 274.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.46ms. Allocated memory is still 312.5MB. Free memory was 274.1MB in the beginning and 272.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 382.41ms. Allocated memory is still 312.5MB. Free memory was 272.0MB in the beginning and 253.6MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 852871.94ms. Allocated memory was 312.5MB in the beginning and 4.7GB in the end (delta: 4.4GB). Free memory was 253.1MB in the beginning and 2.8GB in the end (delta: -2.6GB). Peak memory consumption was 3.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.7s, 174 PlacesBefore, 21 PlacesAfterwards, 185 TransitionsBefore, 17 TransitionsAfterwards, 4092 CoEnabledTransitionPairs, 7 FixpointIterations, 66 TrivialSequentialCompositions, 87 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 31 ConcurrentYvCompositions, 15 ChoiceCompositions, 218 TotalNumberOfCompositions, 3895 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3787, independent: 3777, independent conditional: 0, independent unconditional: 3777, 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: 2360, independent: 2355, independent conditional: 0, independent unconditional: 2355, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3787, independent: 1422, independent conditional: 0, independent unconditional: 1422, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 2360, unknown conditional: 0, unknown unconditional: 2360] , 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: 99]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (23states, 99/413 universal loopers) in iteration 46,while PetriNetUnfolder was constructing finite prefix that currently has 124618 conditions, 7877 events (4333/7876 cut-off events. For 561525/561525 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 64973 event pairs, 326 based on Foata normal form. 4/8305 useless extension candidates. Maximal degree in co-relation 124389. Up to 3171 conditions per place.). - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (23states, 99/413 universal loopers) in iteration 46,while PetriNetUnfolder was constructing finite prefix that currently has 124618 conditions, 7877 events (4333/7876 cut-off events. For 561525/561525 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 64973 event pairs, 326 based on Foata normal form. 4/8305 useless extension candidates. Maximal degree in co-relation 124389. Up to 3171 conditions per place.). - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (23states, 99/413 universal loopers) in iteration 46,while PetriNetUnfolder was constructing finite prefix that currently has 124618 conditions, 7877 events (4333/7876 cut-off events. For 561525/561525 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 64973 event pairs, 326 based on Foata normal form. 4/8305 useless extension candidates. Maximal degree in co-relation 124389. Up to 3171 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 264 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: 852.8s, OverallIterations: 46, TraceHistogramMax: 3, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 754.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.8s, HoareTripleCheckerStatistics: 186 mSolverCounterUnknown, 5931 SdHoareTripleChecker+Valid, 158.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5931 mSDsluCounter, 1386 SdHoareTripleChecker+Invalid, 155.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 142 IncrementalHoareTripleChecker+Unchecked, 1168 mSDsCounter, 1300 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25368 IncrementalHoareTripleChecker+Invalid, 26996 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1300 mSolverCounterUnsat, 218 mSDtfsCounter, 25368 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2891 GetRequests, 1393 SyntacticMatches, 18 SemanticMatches, 1480 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 17004 ImplicationChecksByTransitivity, 435.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85620occurred in iteration=45, InterpolantAutomatonStates: 1124, 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: 0.4s SsaConstructionTime, 3.2s SatisfiabilityAnalysisTime, 78.5s InterpolantComputationTime, 1484 NumberOfCodeBlocks, 1484 NumberOfCodeBlocksAsserted, 117 NumberOfCheckSat, 2050 ConstructedInterpolants, 47 QuantifiedInterpolants, 45090 SizeOfPredicates, 1005 NumberOfNonLiveVariables, 6961 ConjunctsInSsa, 1146 ConjunctsInUnsatCore, 124 InterpolantComputations, 7 PerfectInterpolantSequences, 251/615 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