/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:35:30,074 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:35:30,131 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-SemanticLbe.epf [2023-11-17 16:35:30,152 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:35:30,153 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:35:30,153 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:35:30,153 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:35:30,153 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:35:30,154 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:35:30,156 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:35:30,157 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:35:30,157 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:35:30,157 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:35:30,158 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:35:30,158 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:35:30,158 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:35:30,158 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:35:30,158 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:35:30,158 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:35:30,159 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:35:30,159 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:35:30,159 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:35:30,159 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:35:30,159 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:35:30,160 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:35:30,160 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:35:30,161 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:35:30,161 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:35:30,161 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:35:30,161 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:35:30,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:35:30,162 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:35:30,162 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:35:30,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:35:30,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:35:30,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:35:30,343 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:35:30,344 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:35:30,345 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-11-17 16:35:31,298 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:35:31,426 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:35:31,426 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-11-17 16:35:31,431 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b433a2507/f469d2fd102448c59e28cead0d165b4c/FLAG65cc7a1d7 [2023-11-17 16:35:31,444 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b433a2507/f469d2fd102448c59e28cead0d165b4c [2023-11-17 16:35:31,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:35:31,446 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:35:31,447 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:35:31,447 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:35:31,450 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:35:31,450 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:35:31" (1/1) ... [2023-11-17 16:35:31,451 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59cba52f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:35:31, skipping insertion in model container [2023-11-17 16:35:31,451 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:35:31" (1/1) ... [2023-11-17 16:35:31,465 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:35:31,582 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2454,2467] [2023-11-17 16:35:31,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:35:31,603 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:35:31,631 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2454,2467] [2023-11-17 16:35:31,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:35:31,647 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:35:31,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:35:31 WrapperNode [2023-11-17 16:35:31,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:35:31,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:35:31,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:35:31,649 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:35:31,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:35:31" (1/1) ... [2023-11-17 16:35:31,666 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:35:31" (1/1) ... [2023-11-17 16:35:31,692 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 139 [2023-11-17 16:35:31,693 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:35:31,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:35:31,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:35:31,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:35:31,703 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:35:31" (1/1) ... [2023-11-17 16:35:31,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:35:31" (1/1) ... [2023-11-17 16:35:31,705 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:35:31" (1/1) ... [2023-11-17 16:35:31,706 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:35:31" (1/1) ... [2023-11-17 16:35:31,709 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:35:31" (1/1) ... [2023-11-17 16:35:31,716 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:35:31" (1/1) ... [2023-11-17 16:35:31,717 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:35:31" (1/1) ... [2023-11-17 16:35:31,717 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:35:31" (1/1) ... [2023-11-17 16:35:31,719 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:35:31,719 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:35:31,720 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:35:31,720 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:35:31,720 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:35:31" (1/1) ... [2023-11-17 16:35:31,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:35:31,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:31,743 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) [2023-11-17 16:35:31,750 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 [2023-11-17 16:35:31,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:35:31,765 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:35:31,765 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:35:31,765 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:35:31,765 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:35:31,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:35:31,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:35:31,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:35:31,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:35:31,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:35:31,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:35:31,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:35:31,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:35:31,767 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 16:35:31,829 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:35:31,831 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:35:32,040 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:35:32,056 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:35:32,057 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 16:35:32,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:35:32 BoogieIcfgContainer [2023-11-17 16:35:32,058 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:35:32,059 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:35:32,059 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:35:32,061 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:35:32,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:35:31" (1/3) ... [2023-11-17 16:35:32,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7ea214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:35:32, skipping insertion in model container [2023-11-17 16:35:32,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:35:31" (2/3) ... [2023-11-17 16:35:32,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7ea214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:35:32, skipping insertion in model container [2023-11-17 16:35:32,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:35:32" (3/3) ... [2023-11-17 16:35:32,063 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2023-11-17 16:35:32,076 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:35:32,076 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:35:32,076 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:35:32,146 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:35:32,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 173 transitions, 360 flow [2023-11-17 16:35:32,214 INFO L124 PetriNetUnfolderBase]: 14/171 cut-off events. [2023-11-17 16:35:32,214 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:35:32,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 171 events. 14/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 158 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2023-11-17 16:35:32,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 173 transitions, 360 flow [2023-11-17 16:35:32,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 162 transitions, 336 flow [2023-11-17 16:35:32,225 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:35:32,233 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 162 transitions, 336 flow [2023-11-17 16:35:32,235 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 162 transitions, 336 flow [2023-11-17 16:35:32,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 162 transitions, 336 flow [2023-11-17 16:35:32,262 INFO L124 PetriNetUnfolderBase]: 14/162 cut-off events. [2023-11-17 16:35:32,262 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:35:32,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 162 events. 14/162 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 152 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2023-11-17 16:35:32,265 INFO L119 LiptonReduction]: Number of co-enabled transitions 2268 [2023-11-17 16:35:36,109 INFO L134 LiptonReduction]: Checked pairs total: 2156 [2023-11-17 16:35:36,109 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-11-17 16:35:36,120 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:35:36,124 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=LoopHeads, 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;@56a835ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:35:36,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 16:35:36,127 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:35:36,127 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-17 16:35:36,128 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:35:36,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:36,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:36,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:36,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash 179609904, now seen corresponding path program 1 times [2023-11-17 16:35:36,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:36,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398618617] [2023-11-17 16:35:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:36,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:36,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:36,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398618617] [2023-11-17 16:35:36,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398618617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:35:36,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:35:36,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:35:36,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325225215] [2023-11-17 16:35:36,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:35:36,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:35:36,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:36,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:35:36,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:35:36,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 367 [2023-11-17 16:35:36,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:36,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:36,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 367 [2023-11-17 16:35:36,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:36,454 INFO L124 PetriNetUnfolderBase]: 75/136 cut-off events. [2023-11-17 16:35:36,454 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-17 16:35:36,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 136 events. 75/136 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 355 event pairs, 24 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-17 16:35:36,458 INFO L140 encePairwiseOnDemand]: 363/367 looper letters, 25 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-11-17 16:35:36,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 29 transitions, 137 flow [2023-11-17 16:35:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:35:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:35:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-11-17 16:35:36,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223433242506812 [2023-11-17 16:35:36,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-11-17 16:35:36,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-11-17 16:35:36,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:36,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-11-17 16:35:36,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:36,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:36,490 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:36,491 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 465 transitions. [2023-11-17 16:35:36,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 29 transitions, 137 flow [2023-11-17 16:35:36,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:35:36,495 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-11-17 16:35:36,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, 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=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-17 16:35:36,499 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-17 16:35:36,500 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-11-17 16:35:36,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:36,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:36,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:36,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:35:36,501 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:36,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:36,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1212858338, now seen corresponding path program 1 times [2023-11-17 16:35:36,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:36,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782471271] [2023-11-17 16:35:36,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:36,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:36,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:36,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782471271] [2023-11-17 16:35:36,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782471271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:35:36,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:35:36,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:35:36,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80606612] [2023-11-17 16:35:36,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:35:36,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:35:36,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:36,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:35:36,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:35:36,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 367 [2023-11-17 16:35:36,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:36,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:36,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 367 [2023-11-17 16:35:36,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:36,704 INFO L124 PetriNetUnfolderBase]: 75/137 cut-off events. [2023-11-17 16:35:36,705 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-17 16:35:36,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 137 events. 75/137 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 335 event pairs, 48 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 120. Up to 137 conditions per place. [2023-11-17 16:35:36,708 INFO L140 encePairwiseOnDemand]: 364/367 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-11-17 16:35:36,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 99 flow [2023-11-17 16:35:36,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:35:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:35:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-11-17 16:35:36,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40962761126248864 [2023-11-17 16:35:36,709 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-11-17 16:35:36,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-11-17 16:35:36,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:36,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-11-17 16:35:36,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:36,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:36,713 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:36,714 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 3 states and 451 transitions. [2023-11-17 16:35:36,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 99 flow [2023-11-17 16:35:36,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 20 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:35:36,715 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 66 flow [2023-11-17 16:35:36,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-11-17 16:35:36,715 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-11-17 16:35:36,716 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 66 flow [2023-11-17 16:35:36,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:36,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:36,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:36,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:35:36,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:36,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:36,719 INFO L85 PathProgramCache]: Analyzing trace with hash 444049041, now seen corresponding path program 1 times [2023-11-17 16:35:36,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:36,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375972077] [2023-11-17 16:35:36,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:36,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:36,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:36,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375972077] [2023-11-17 16:35:36,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375972077] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:36,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655389512] [2023-11-17 16:35:36,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:36,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:36,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:36,869 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) [2023-11-17 16:35:36,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 16:35:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:36,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:35:36,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:37,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:37,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655389512] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:37,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:35:37,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-17 16:35:37,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692686013] [2023-11-17 16:35:37,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:35:37,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:35:37,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:35:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:35:37,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 367 [2023-11-17 16:35:37,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:37,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:37,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 367 [2023-11-17 16:35:37,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:37,133 INFO L124 PetriNetUnfolderBase]: 83/151 cut-off events. [2023-11-17 16:35:37,133 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 16:35:37,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 151 events. 83/151 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 412 event pairs, 24 based on Foata normal form. 6/156 useless extension candidates. Maximal degree in co-relation 347. Up to 78 conditions per place. [2023-11-17 16:35:37,135 INFO L140 encePairwiseOnDemand]: 363/367 looper letters, 31 selfloop transitions, 4 changer transitions 1/36 dead transitions. [2023-11-17 16:35:37,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 36 transitions, 178 flow [2023-11-17 16:35:37,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:35:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:35:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-11-17 16:35:37,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196185286103542 [2023-11-17 16:35:37,137 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-11-17 16:35:37,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-11-17 16:35:37,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:37,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-11-17 16:35:37,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:37,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:37,141 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:37,141 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 66 flow. Second operand 4 states and 616 transitions. [2023-11-17 16:35:37,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 36 transitions, 178 flow [2023-11-17 16:35:37,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 36 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:35:37,143 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 88 flow [2023-11-17 16:35:37,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-11-17 16:35:37,144 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-17 16:35:37,144 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 88 flow [2023-11-17 16:35:37,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:37,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:37,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:37,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:37,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:37,351 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:37,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:37,351 INFO L85 PathProgramCache]: Analyzing trace with hash 2080645205, now seen corresponding path program 2 times [2023-11-17 16:35:37,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:37,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944086220] [2023-11-17 16:35:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:37,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:37,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:37,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944086220] [2023-11-17 16:35:37,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944086220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:35:37,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:35:37,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:35:37,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113896792] [2023-11-17 16:35:37,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:35:37,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:35:37,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:37,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:35:37,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:35:37,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:35:37,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:37,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:37,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:35:37,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:37,515 INFO L124 PetriNetUnfolderBase]: 101/196 cut-off events. [2023-11-17 16:35:37,515 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2023-11-17 16:35:37,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 196 events. 101/196 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 668 event pairs, 26 based on Foata normal form. 14/209 useless extension candidates. Maximal degree in co-relation 524. Up to 103 conditions per place. [2023-11-17 16:35:37,516 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 33 selfloop transitions, 7 changer transitions 11/51 dead transitions. [2023-11-17 16:35:37,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 51 transitions, 289 flow [2023-11-17 16:35:37,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:35:37,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:35:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 900 transitions. [2023-11-17 16:35:37,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087193460490463 [2023-11-17 16:35:37,518 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 900 transitions. [2023-11-17 16:35:37,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 900 transitions. [2023-11-17 16:35:37,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:37,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 900 transitions. [2023-11-17 16:35:37,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:37,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:37,523 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:37,524 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 88 flow. Second operand 6 states and 900 transitions. [2023-11-17 16:35:37,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 51 transitions, 289 flow [2023-11-17 16:35:37,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 51 transitions, 282 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:35:37,525 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 150 flow [2023-11-17 16:35:37,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-17 16:35:37,526 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-11-17 16:35:37,526 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 150 flow [2023-11-17 16:35:37,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:37,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:37,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:37,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:35:37,527 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:37,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:37,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1487164091, now seen corresponding path program 3 times [2023-11-17 16:35:37,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:37,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129942033] [2023-11-17 16:35:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:37,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:37,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:37,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129942033] [2023-11-17 16:35:37,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129942033] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:37,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27111859] [2023-11-17 16:35:37,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:35:37,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:37,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:37,602 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) [2023-11-17 16:35:37,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 16:35:37,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:35:37,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:37,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:35:37,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:37,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:37,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27111859] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:37,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:37,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 16:35:37,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762502746] [2023-11-17 16:35:37,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:37,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:35:37,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:37,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:35:37,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:35:37,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:35:37,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 150 flow. Second operand has 8 states, 8 states have (on average 144.625) internal successors, (1157), 8 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:37,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:37,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:35:37,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:37,804 INFO L124 PetriNetUnfolderBase]: 108/212 cut-off events. [2023-11-17 16:35:37,804 INFO L125 PetriNetUnfolderBase]: For 306/306 co-relation queries the response was YES. [2023-11-17 16:35:37,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 212 events. 108/212 cut-off events. For 306/306 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 688 event pairs, 36 based on Foata normal form. 6/217 useless extension candidates. Maximal degree in co-relation 745. Up to 135 conditions per place. [2023-11-17 16:35:37,805 INFO L140 encePairwiseOnDemand]: 362/367 looper letters, 34 selfloop transitions, 13 changer transitions 4/51 dead transitions. [2023-11-17 16:35:37,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 365 flow [2023-11-17 16:35:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:35:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:35:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 752 transitions. [2023-11-17 16:35:37,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098092643051771 [2023-11-17 16:35:37,807 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 752 transitions. [2023-11-17 16:35:37,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 752 transitions. [2023-11-17 16:35:37,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:37,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 752 transitions. [2023-11-17 16:35:37,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:37,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 367.0) internal successors, (2202), 6 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:37,811 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 367.0) internal successors, (2202), 6 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:37,811 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 150 flow. Second operand 5 states and 752 transitions. [2023-11-17 16:35:37,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 365 flow [2023-11-17 16:35:37,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 345 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-17 16:35:37,813 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 229 flow [2023-11-17 16:35:37,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-17 16:35:37,814 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2023-11-17 16:35:37,814 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 229 flow [2023-11-17 16:35:37,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 144.625) internal successors, (1157), 8 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:37,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:37,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:37,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:38,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:38,022 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:38,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:38,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1458948726, now seen corresponding path program 1 times [2023-11-17 16:35:38,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:38,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090772361] [2023-11-17 16:35:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:38,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:38,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:38,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090772361] [2023-11-17 16:35:38,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090772361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:38,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224617246] [2023-11-17 16:35:38,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:38,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:38,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:38,133 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) [2023-11-17 16:35:38,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 16:35:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:38,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:35:38,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:38,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:35:38,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224617246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:35:38,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:35:38,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2023-11-17 16:35:38,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563960565] [2023-11-17 16:35:38,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:35:38,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:35:38,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:38,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:35:38,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:35:38,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:35:38,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 229 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:38,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:38,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:35:38,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:38,324 INFO L124 PetriNetUnfolderBase]: 114/222 cut-off events. [2023-11-17 16:35:38,325 INFO L125 PetriNetUnfolderBase]: For 523/523 co-relation queries the response was YES. [2023-11-17 16:35:38,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 914 conditions, 222 events. 114/222 cut-off events. For 523/523 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 739 event pairs, 24 based on Foata normal form. 4/225 useless extension candidates. Maximal degree in co-relation 889. Up to 110 conditions per place. [2023-11-17 16:35:38,326 INFO L140 encePairwiseOnDemand]: 362/367 looper letters, 36 selfloop transitions, 14 changer transitions 7/57 dead transitions. [2023-11-17 16:35:38,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 57 transitions, 443 flow [2023-11-17 16:35:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:35:38,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:35:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 900 transitions. [2023-11-17 16:35:38,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087193460490463 [2023-11-17 16:35:38,329 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 900 transitions. [2023-11-17 16:35:38,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 900 transitions. [2023-11-17 16:35:38,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:38,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 900 transitions. [2023-11-17 16:35:38,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:38,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:38,334 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:38,334 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 229 flow. Second operand 6 states and 900 transitions. [2023-11-17 16:35:38,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 57 transitions, 443 flow [2023-11-17 16:35:38,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 57 transitions, 430 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-17 16:35:38,338 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 272 flow [2023-11-17 16:35:38,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-11-17 16:35:38,340 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-11-17 16:35:38,340 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 272 flow [2023-11-17 16:35:38,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:38,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:38,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:38,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:38,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:38,545 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:38,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:38,546 INFO L85 PathProgramCache]: Analyzing trace with hash 731607492, now seen corresponding path program 2 times [2023-11-17 16:35:38,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:38,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65354467] [2023-11-17 16:35:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:38,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:38,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:38,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65354467] [2023-11-17 16:35:38,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65354467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:38,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942063389] [2023-11-17 16:35:38,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:35:38,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:38,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:38,630 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) [2023-11-17 16:35:38,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 16:35:38,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:35:38,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:38,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:35:38,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:38,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:35:38,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942063389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:35:38,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:35:38,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2023-11-17 16:35:38,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957185763] [2023-11-17 16:35:38,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:35:38,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:35:38,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:35:38,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:35:38,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 367 [2023-11-17 16:35:38,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:38,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:38,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 367 [2023-11-17 16:35:38,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:38,771 INFO L124 PetriNetUnfolderBase]: 114/216 cut-off events. [2023-11-17 16:35:38,771 INFO L125 PetriNetUnfolderBase]: For 746/746 co-relation queries the response was YES. [2023-11-17 16:35:38,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 216 events. 114/216 cut-off events. For 746/746 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 710 event pairs, 34 based on Foata normal form. 4/219 useless extension candidates. Maximal degree in co-relation 932. Up to 149 conditions per place. [2023-11-17 16:35:38,772 INFO L140 encePairwiseOnDemand]: 363/367 looper letters, 31 selfloop transitions, 12 changer transitions 4/47 dead transitions. [2023-11-17 16:35:38,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 427 flow [2023-11-17 16:35:38,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:35:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:35:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 621 transitions. [2023-11-17 16:35:38,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42302452316076294 [2023-11-17 16:35:38,774 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 621 transitions. [2023-11-17 16:35:38,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 621 transitions. [2023-11-17 16:35:38,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:38,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 621 transitions. [2023-11-17 16:35:38,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:38,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:38,777 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:38,777 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 272 flow. Second operand 4 states and 621 transitions. [2023-11-17 16:35:38,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 427 flow [2023-11-17 16:35:38,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 388 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-17 16:35:38,779 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 281 flow [2023-11-17 16:35:38,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-11-17 16:35:38,780 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-11-17 16:35:38,780 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 281 flow [2023-11-17 16:35:38,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:38,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:38,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:38,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:38,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:38,985 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:38,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:38,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2027218697, now seen corresponding path program 4 times [2023-11-17 16:35:38,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:38,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227689937] [2023-11-17 16:35:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:38,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:39,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:39,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227689937] [2023-11-17 16:35:39,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227689937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:35:39,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:35:39,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:35:39,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900448510] [2023-11-17 16:35:39,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:35:39,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:35:39,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:39,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:35:39,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:35:39,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:35:39,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:39,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:39,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:35:39,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:39,111 INFO L124 PetriNetUnfolderBase]: 100/181 cut-off events. [2023-11-17 16:35:39,111 INFO L125 PetriNetUnfolderBase]: For 636/636 co-relation queries the response was YES. [2023-11-17 16:35:39,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 181 events. 100/181 cut-off events. For 636/636 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 509 event pairs, 31 based on Foata normal form. 4/184 useless extension candidates. Maximal degree in co-relation 804. Up to 130 conditions per place. [2023-11-17 16:35:39,112 INFO L140 encePairwiseOnDemand]: 362/367 looper letters, 32 selfloop transitions, 9 changer transitions 4/45 dead transitions. [2023-11-17 16:35:39,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 414 flow [2023-11-17 16:35:39,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:35:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:35:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 740 transitions. [2023-11-17 16:35:39,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032697547683924 [2023-11-17 16:35:39,114 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 740 transitions. [2023-11-17 16:35:39,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 740 transitions. [2023-11-17 16:35:39,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:39,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 740 transitions. [2023-11-17 16:35:39,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:39,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 367.0) internal successors, (2202), 6 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:39,118 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 367.0) internal successors, (2202), 6 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:39,118 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 281 flow. Second operand 5 states and 740 transitions. [2023-11-17 16:35:39,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 414 flow [2023-11-17 16:35:39,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 396 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 16:35:39,120 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 299 flow [2023-11-17 16:35:39,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-11-17 16:35:39,122 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2023-11-17 16:35:39,122 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 299 flow [2023-11-17 16:35:39,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:39,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:39,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:39,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 16:35:39,123 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:39,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:39,124 INFO L85 PathProgramCache]: Analyzing trace with hash -221892849, now seen corresponding path program 1 times [2023-11-17 16:35:39,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:39,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738147071] [2023-11-17 16:35:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:39,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:35:39,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:39,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738147071] [2023-11-17 16:35:39,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738147071] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:39,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083780644] [2023-11-17 16:35:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:39,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:39,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:39,197 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) [2023-11-17 16:35:39,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 16:35:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:39,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 16:35:39,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:39,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 16:35:39,337 INFO L378 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 8 treesize of output 1 [2023-11-17 16:35:39,368 INFO L378 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 8 treesize of output 1 [2023-11-17 16:35:39,416 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:39,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 18 [2023-11-17 16:35:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:39,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:41,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:41,702 INFO L378 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 142 treesize of output 94 [2023-11-17 16:35:41,747 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:41,748 INFO L378 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 556 treesize of output 516 [2023-11-17 16:35:41,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:41,781 INFO L378 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 98 treesize of output 108 [2023-11-17 16:35:41,808 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:41,809 INFO L378 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 125 treesize of output 105 [2023-11-17 16:35:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:42,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083780644] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:42,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:42,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2023-11-17 16:35:42,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313082348] [2023-11-17 16:35:42,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:42,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:35:42,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:42,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:35:42,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=162, Unknown=6, NotChecked=0, Total=210 [2023-11-17 16:35:42,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 367 [2023-11-17 16:35:42,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 299 flow. Second operand has 15 states, 15 states have (on average 103.06666666666666) internal successors, (1546), 15 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:42,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:42,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 367 [2023-11-17 16:35:42,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:42,692 INFO L124 PetriNetUnfolderBase]: 293/516 cut-off events. [2023-11-17 16:35:42,693 INFO L125 PetriNetUnfolderBase]: For 1858/1858 co-relation queries the response was YES. [2023-11-17 16:35:42,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2477 conditions, 516 events. 293/516 cut-off events. For 1858/1858 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2079 event pairs, 29 based on Foata normal form. 30/544 useless extension candidates. Maximal degree in co-relation 2432. Up to 227 conditions per place. [2023-11-17 16:35:42,695 INFO L140 encePairwiseOnDemand]: 358/367 looper letters, 41 selfloop transitions, 22 changer transitions 86/149 dead transitions. [2023-11-17 16:35:42,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 149 transitions, 1366 flow [2023-11-17 16:35:42,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 16:35:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 16:35:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2230 transitions. [2023-11-17 16:35:42,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.289347346568055 [2023-11-17 16:35:42,700 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2230 transitions. [2023-11-17 16:35:42,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2230 transitions. [2023-11-17 16:35:42,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:42,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2230 transitions. [2023-11-17 16:35:42,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 106.19047619047619) internal successors, (2230), 21 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:42,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 367.0) internal successors, (8074), 22 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:42,711 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 367.0) internal successors, (8074), 22 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:42,711 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 299 flow. Second operand 21 states and 2230 transitions. [2023-11-17 16:35:42,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 149 transitions, 1366 flow [2023-11-17 16:35:42,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 149 transitions, 1284 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-11-17 16:35:42,717 INFO L231 Difference]: Finished difference. Result has 72 places, 43 transitions, 430 flow [2023-11-17 16:35:42,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=430, PETRI_PLACES=72, PETRI_TRANSITIONS=43} [2023-11-17 16:35:42,718 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-11-17 16:35:42,718 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 43 transitions, 430 flow [2023-11-17 16:35:42,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 103.06666666666666) internal successors, (1546), 15 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:42,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:42,719 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:42,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:42,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:42,925 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:42,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:42,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1614953346, now seen corresponding path program 2 times [2023-11-17 16:35:42,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:42,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197538964] [2023-11-17 16:35:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:42,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:43,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:43,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197538964] [2023-11-17 16:35:43,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197538964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:43,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709737982] [2023-11-17 16:35:43,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:35:43,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:43,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:43,381 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) [2023-11-17 16:35:43,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 16:35:43,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:35:43,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:43,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 16:35:43,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:43,520 INFO L378 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 19 treesize of output 1 [2023-11-17 16:35:43,556 INFO L378 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 8 treesize of output 1 [2023-11-17 16:35:43,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:35:43,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 16:35:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:43,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:44,025 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:44,025 INFO L378 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 168 treesize of output 108 [2023-11-17 16:35:44,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:44,054 INFO L378 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 585 treesize of output 565 [2023-11-17 16:35:44,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:44,106 INFO L378 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 113 treesize of output 145 [2023-11-17 16:35:44,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:44,140 INFO L378 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 125 treesize of output 105 [2023-11-17 16:35:45,699 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-11-17 16:35:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:45,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709737982] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:45,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:45,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-17 16:35:45,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853241457] [2023-11-17 16:35:45,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:45,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:35:45,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:45,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:35:45,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=354, Unknown=1, NotChecked=0, Total=462 [2023-11-17 16:35:45,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 367 [2023-11-17 16:35:45,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 43 transitions, 430 flow. Second operand has 22 states, 22 states have (on average 112.18181818181819) internal successors, (2468), 22 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:45,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:45,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 367 [2023-11-17 16:35:45,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:46,163 INFO L124 PetriNetUnfolderBase]: 239/438 cut-off events. [2023-11-17 16:35:46,164 INFO L125 PetriNetUnfolderBase]: For 2935/2935 co-relation queries the response was YES. [2023-11-17 16:35:46,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574 conditions, 438 events. 239/438 cut-off events. For 2935/2935 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1606 event pairs, 41 based on Foata normal form. 2/438 useless extension candidates. Maximal degree in co-relation 2537. Up to 190 conditions per place. [2023-11-17 16:35:46,166 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 54 selfloop transitions, 21 changer transitions 31/106 dead transitions. [2023-11-17 16:35:46,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 106 transitions, 1164 flow [2023-11-17 16:35:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:35:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:35:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1291 transitions. [2023-11-17 16:35:46,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3197919246965569 [2023-11-17 16:35:46,170 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1291 transitions. [2023-11-17 16:35:46,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1291 transitions. [2023-11-17 16:35:46,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:46,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1291 transitions. [2023-11-17 16:35:46,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 117.36363636363636) internal successors, (1291), 11 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:46,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 367.0) internal successors, (4404), 12 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:46,176 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 367.0) internal successors, (4404), 12 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:46,176 INFO L175 Difference]: Start difference. First operand has 72 places, 43 transitions, 430 flow. Second operand 11 states and 1291 transitions. [2023-11-17 16:35:46,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 106 transitions, 1164 flow [2023-11-17 16:35:46,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 106 transitions, 945 flow, removed 86 selfloop flow, removed 12 redundant places. [2023-11-17 16:35:46,184 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 496 flow [2023-11-17 16:35:46,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=496, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-11-17 16:35:46,185 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 44 predicate places. [2023-11-17 16:35:46,185 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 496 flow [2023-11-17 16:35:46,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 112.18181818181819) internal successors, (2468), 22 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:46,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:46,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:46,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:46,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:46,393 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:46,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1809571482, now seen corresponding path program 3 times [2023-11-17 16:35:46,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:46,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684605725] [2023-11-17 16:35:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:46,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:47,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:47,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684605725] [2023-11-17 16:35:47,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684605725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:47,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018134490] [2023-11-17 16:35:47,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:35:47,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:47,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:47,189 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) [2023-11-17 16:35:47,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 16:35:47,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:35:47,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:47,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-17 16:35:47,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:47,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:47,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-11-17 16:35:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:35:47,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:47,443 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-17 16:35:47,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-17 16:35:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:35:47,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018134490] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:47,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:47,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 3] total 14 [2023-11-17 16:35:47,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199851602] [2023-11-17 16:35:47,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:47,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 16:35:47,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:47,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 16:35:47,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-17 16:35:47,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 367 [2023-11-17 16:35:47,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 496 flow. Second operand has 16 states, 16 states have (on average 112.8125) internal successors, (1805), 16 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:47,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:47,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 367 [2023-11-17 16:35:47,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:47,899 INFO L124 PetriNetUnfolderBase]: 326/585 cut-off events. [2023-11-17 16:35:47,899 INFO L125 PetriNetUnfolderBase]: For 2617/2617 co-relation queries the response was YES. [2023-11-17 16:35:47,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3189 conditions, 585 events. 326/585 cut-off events. For 2617/2617 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2304 event pairs, 63 based on Foata normal form. 1/584 useless extension candidates. Maximal degree in co-relation 3147. Up to 318 conditions per place. [2023-11-17 16:35:47,903 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 84 selfloop transitions, 46 changer transitions 1/131 dead transitions. [2023-11-17 16:35:47,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 131 transitions, 1363 flow [2023-11-17 16:35:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 16:35:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 16:35:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1743 transitions. [2023-11-17 16:35:47,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31662125340599456 [2023-11-17 16:35:47,907 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1743 transitions. [2023-11-17 16:35:47,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1743 transitions. [2023-11-17 16:35:47,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:47,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1743 transitions. [2023-11-17 16:35:47,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.2) internal successors, (1743), 15 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:47,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 367.0) internal successors, (5872), 16 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:47,915 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 367.0) internal successors, (5872), 16 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:47,915 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 496 flow. Second operand 15 states and 1743 transitions. [2023-11-17 16:35:47,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 131 transitions, 1363 flow [2023-11-17 16:35:47,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 131 transitions, 1290 flow, removed 28 selfloop flow, removed 5 redundant places. [2023-11-17 16:35:47,924 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 924 flow [2023-11-17 16:35:47,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=924, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2023-11-17 16:35:47,925 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-11-17 16:35:47,925 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 924 flow [2023-11-17 16:35:47,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 112.8125) internal successors, (1805), 16 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:47,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:47,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:47,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:48,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:48,130 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:48,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:48,131 INFO L85 PathProgramCache]: Analyzing trace with hash 417718798, now seen corresponding path program 4 times [2023-11-17 16:35:48,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:48,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901146719] [2023-11-17 16:35:48,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:48,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:48,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:48,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901146719] [2023-11-17 16:35:48,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901146719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:48,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094831731] [2023-11-17 16:35:48,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:35:48,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:48,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:48,505 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) [2023-11-17 16:35:48,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 16:35:48,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:35:48,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:48,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:35:48,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:48,694 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:48,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-11-17 16:35:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:48,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:48,766 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-17 16:35:48,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-17 16:35:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:35:48,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094831731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:48,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:48,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 3] total 15 [2023-11-17 16:35:48,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645268917] [2023-11-17 16:35:48,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:48,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:35:48,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:48,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:35:48,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:35:48,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 367 [2023-11-17 16:35:48,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 924 flow. Second operand has 17 states, 17 states have (on average 120.70588235294117) internal successors, (2052), 17 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:48,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:48,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 367 [2023-11-17 16:35:48,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:49,199 INFO L124 PetriNetUnfolderBase]: 422/754 cut-off events. [2023-11-17 16:35:49,199 INFO L125 PetriNetUnfolderBase]: For 3951/3951 co-relation queries the response was YES. [2023-11-17 16:35:49,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4284 conditions, 754 events. 422/754 cut-off events. For 3951/3951 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3244 event pairs, 92 based on Foata normal form. 1/754 useless extension candidates. Maximal degree in co-relation 3795. Up to 559 conditions per place. [2023-11-17 16:35:49,204 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 104 selfloop transitions, 36 changer transitions 1/141 dead transitions. [2023-11-17 16:35:49,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 141 transitions, 1670 flow [2023-11-17 16:35:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 16:35:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 16:35:49,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1851 transitions. [2023-11-17 16:35:49,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3362397820163488 [2023-11-17 16:35:49,208 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1851 transitions. [2023-11-17 16:35:49,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1851 transitions. [2023-11-17 16:35:49,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:49,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1851 transitions. [2023-11-17 16:35:49,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 123.4) internal successors, (1851), 15 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:49,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 367.0) internal successors, (5872), 16 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:49,216 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 367.0) internal successors, (5872), 16 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:49,216 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 924 flow. Second operand 15 states and 1851 transitions. [2023-11-17 16:35:49,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 141 transitions, 1670 flow [2023-11-17 16:35:49,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 141 transitions, 1572 flow, removed 47 selfloop flow, removed 2 redundant places. [2023-11-17 16:35:49,225 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 1135 flow [2023-11-17 16:35:49,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1135, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2023-11-17 16:35:49,226 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 64 predicate places. [2023-11-17 16:35:49,226 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 1135 flow [2023-11-17 16:35:49,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 120.70588235294117) internal successors, (2052), 17 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:49,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:49,226 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:49,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:49,430 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,SelfDestructingSolverStorable11 [2023-11-17 16:35:49,431 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:49,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:49,431 INFO L85 PathProgramCache]: Analyzing trace with hash -282982392, now seen corresponding path program 5 times [2023-11-17 16:35:49,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:49,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608506598] [2023-11-17 16:35:49,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:49,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:49,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:49,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608506598] [2023-11-17 16:35:49,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608506598] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:49,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877579387] [2023-11-17 16:35:49,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:35:49,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:49,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:49,876 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) [2023-11-17 16:35:49,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 16:35:49,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:35:49,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:49,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 16:35:49,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:49,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-11-17 16:35:50,089 INFO L378 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 22 treesize of output 15 [2023-11-17 16:35:50,134 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:50,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-11-17 16:35:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:50,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:50,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:50,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 108 [2023-11-17 16:35:50,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:50,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2023-11-17 16:35:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:35:50,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877579387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:50,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:50,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-11-17 16:35:50,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353401362] [2023-11-17 16:35:50,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:50,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:35:50,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:50,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:35:50,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=354, Unknown=1, NotChecked=0, Total=420 [2023-11-17 16:35:50,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 367 [2023-11-17 16:35:50,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 1135 flow. Second operand has 21 states, 21 states have (on average 115.19047619047619) internal successors, (2419), 21 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:50,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:50,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 367 [2023-11-17 16:35:50,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:52,720 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] [2023-11-17 16:35:53,134 INFO L124 PetriNetUnfolderBase]: 695/1243 cut-off events. [2023-11-17 16:35:53,134 INFO L125 PetriNetUnfolderBase]: For 6711/6711 co-relation queries the response was YES. [2023-11-17 16:35:53,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7031 conditions, 1243 events. 695/1243 cut-off events. For 6711/6711 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6357 event pairs, 104 based on Foata normal form. 3/1246 useless extension candidates. Maximal degree in co-relation 6377. Up to 533 conditions per place. [2023-11-17 16:35:53,142 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 121 selfloop transitions, 84 changer transitions 9/214 dead transitions. [2023-11-17 16:35:53,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 214 transitions, 2522 flow [2023-11-17 16:35:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:35:53,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:35:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2159 transitions. [2023-11-17 16:35:53,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32682409930366335 [2023-11-17 16:35:53,147 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2159 transitions. [2023-11-17 16:35:53,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2159 transitions. [2023-11-17 16:35:53,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:53,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2159 transitions. [2023-11-17 16:35:53,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 119.94444444444444) internal successors, (2159), 18 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:53,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 367.0) internal successors, (6973), 19 states have internal predecessors, (6973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:53,157 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 367.0) internal successors, (6973), 19 states have internal predecessors, (6973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:53,157 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 1135 flow. Second operand 18 states and 2159 transitions. [2023-11-17 16:35:53,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 214 transitions, 2522 flow [2023-11-17 16:35:53,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 214 transitions, 2407 flow, removed 46 selfloop flow, removed 6 redundant places. [2023-11-17 16:35:53,176 INFO L231 Difference]: Finished difference. Result has 101 places, 143 transitions, 1877 flow [2023-11-17 16:35:53,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1877, PETRI_PLACES=101, PETRI_TRANSITIONS=143} [2023-11-17 16:35:53,177 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 80 predicate places. [2023-11-17 16:35:53,177 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 143 transitions, 1877 flow [2023-11-17 16:35:53,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 115.19047619047619) internal successors, (2419), 21 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:53,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:53,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:53,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:53,382 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,SelfDestructingSolverStorable12 [2023-11-17 16:35:53,382 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:53,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:53,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1514258668, now seen corresponding path program 6 times [2023-11-17 16:35:53,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:53,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175591508] [2023-11-17 16:35:53,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:53,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:35:54,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:54,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175591508] [2023-11-17 16:35:54,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175591508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:54,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078201994] [2023-11-17 16:35:54,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:35:54,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:54,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:54,025 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) [2023-11-17 16:35:54,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 16:35:54,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:35:54,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:54,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 16:35:54,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:54,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:35:54,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 16:35:54,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:54,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-11-17 16:35:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:35:54,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:54,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:54,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-11-17 16:35:54,460 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:35:54,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-11-17 16:35:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:35:54,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078201994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:54,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:54,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-11-17 16:35:54,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026202859] [2023-11-17 16:35:54,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:54,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:35:54,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:54,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:35:54,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=352, Unknown=3, NotChecked=0, Total=420 [2023-11-17 16:35:54,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 367 [2023-11-17 16:35:54,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 143 transitions, 1877 flow. Second operand has 21 states, 21 states have (on average 112.19047619047619) internal successors, (2356), 21 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:54,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:54,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 367 [2023-11-17 16:35:54,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:55,232 INFO L124 PetriNetUnfolderBase]: 829/1489 cut-off events. [2023-11-17 16:35:55,232 INFO L125 PetriNetUnfolderBase]: For 10248/10248 co-relation queries the response was YES. [2023-11-17 16:35:55,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8959 conditions, 1489 events. 829/1489 cut-off events. For 10248/10248 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7811 event pairs, 183 based on Foata normal form. 3/1492 useless extension candidates. Maximal degree in co-relation 8570. Up to 1069 conditions per place. [2023-11-17 16:35:55,241 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 149 selfloop transitions, 64 changer transitions 2/215 dead transitions. [2023-11-17 16:35:55,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 215 transitions, 2955 flow [2023-11-17 16:35:55,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:35:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:35:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1857 transitions. [2023-11-17 16:35:55,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3162465940054496 [2023-11-17 16:35:55,246 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1857 transitions. [2023-11-17 16:35:55,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1857 transitions. [2023-11-17 16:35:55,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:55,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1857 transitions. [2023-11-17 16:35:55,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 116.0625) internal successors, (1857), 16 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:55,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 367.0) internal successors, (6239), 17 states have internal predecessors, (6239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:55,257 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 367.0) internal successors, (6239), 17 states have internal predecessors, (6239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:55,257 INFO L175 Difference]: Start difference. First operand has 101 places, 143 transitions, 1877 flow. Second operand 16 states and 1857 transitions. [2023-11-17 16:35:55,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 215 transitions, 2955 flow [2023-11-17 16:35:55,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 215 transitions, 2704 flow, removed 114 selfloop flow, removed 6 redundant places. [2023-11-17 16:35:55,279 INFO L231 Difference]: Finished difference. Result has 113 places, 163 transitions, 2140 flow [2023-11-17 16:35:55,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2140, PETRI_PLACES=113, PETRI_TRANSITIONS=163} [2023-11-17 16:35:55,280 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 92 predicate places. [2023-11-17 16:35:55,280 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 163 transitions, 2140 flow [2023-11-17 16:35:55,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 112.19047619047619) internal successors, (2356), 21 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:55,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:55,281 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:55,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:55,485 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,SelfDestructingSolverStorable13 [2023-11-17 16:35:55,486 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:55,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:55,486 INFO L85 PathProgramCache]: Analyzing trace with hash -477755751, now seen corresponding path program 7 times [2023-11-17 16:35:55,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:55,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862120163] [2023-11-17 16:35:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:55,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:35:55,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:55,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862120163] [2023-11-17 16:35:55,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862120163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:55,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802171353] [2023-11-17 16:35:55,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:35:55,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:55,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:55,594 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) [2023-11-17 16:35:55,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 16:35:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:55,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:35:55,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:35:55,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:35:55,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802171353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:55,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:55,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-17 16:35:55,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472400642] [2023-11-17 16:35:55,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:55,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:35:55,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:35:55,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:35:55,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:35:55,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 163 transitions, 2140 flow. Second operand has 15 states, 15 states have (on average 144.26666666666668) internal successors, (2164), 15 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:55,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:55,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:35:55,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:56,413 INFO L124 PetriNetUnfolderBase]: 1089/1963 cut-off events. [2023-11-17 16:35:56,413 INFO L125 PetriNetUnfolderBase]: For 11727/11727 co-relation queries the response was YES. [2023-11-17 16:35:56,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11567 conditions, 1963 events. 1089/1963 cut-off events. For 11727/11727 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10938 event pairs, 158 based on Foata normal form. 36/1999 useless extension candidates. Maximal degree in co-relation 11208. Up to 687 conditions per place. [2023-11-17 16:35:56,425 INFO L140 encePairwiseOnDemand]: 362/367 looper letters, 179 selfloop transitions, 76 changer transitions 0/255 dead transitions. [2023-11-17 16:35:56,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 255 transitions, 3597 flow [2023-11-17 16:35:56,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:35:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:35:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1649 transitions. [2023-11-17 16:35:56,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4084716373544711 [2023-11-17 16:35:56,428 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1649 transitions. [2023-11-17 16:35:56,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1649 transitions. [2023-11-17 16:35:56,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:56,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1649 transitions. [2023-11-17 16:35:56,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 149.9090909090909) internal successors, (1649), 11 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:56,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 367.0) internal successors, (4404), 12 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:56,433 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 367.0) internal successors, (4404), 12 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:56,433 INFO L175 Difference]: Start difference. First operand has 113 places, 163 transitions, 2140 flow. Second operand 11 states and 1649 transitions. [2023-11-17 16:35:56,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 255 transitions, 3597 flow [2023-11-17 16:35:56,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 255 transitions, 3413 flow, removed 69 selfloop flow, removed 9 redundant places. [2023-11-17 16:35:56,462 INFO L231 Difference]: Finished difference. Result has 121 places, 186 transitions, 2609 flow [2023-11-17 16:35:56,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=1978, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2609, PETRI_PLACES=121, PETRI_TRANSITIONS=186} [2023-11-17 16:35:56,463 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 100 predicate places. [2023-11-17 16:35:56,463 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 186 transitions, 2609 flow [2023-11-17 16:35:56,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 144.26666666666668) internal successors, (2164), 15 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:56,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:56,464 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:56,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:56,666 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,SelfDestructingSolverStorable14 [2023-11-17 16:35:56,666 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:56,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:56,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1269986487, now seen corresponding path program 8 times [2023-11-17 16:35:56,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:56,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033445338] [2023-11-17 16:35:56,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:56,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:35:56,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:56,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033445338] [2023-11-17 16:35:56,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033445338] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:56,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816747373] [2023-11-17 16:35:56,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:35:56,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:56,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:56,790 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) [2023-11-17 16:35:56,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 16:35:56,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:35:56,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:56,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:35:56,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:35:56,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:35:57,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816747373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:57,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:57,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-17 16:35:57,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547488749] [2023-11-17 16:35:57,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:57,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:35:57,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:35:57,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:35:57,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:35:57,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 186 transitions, 2609 flow. Second operand has 17 states, 17 states have (on average 144.0) internal successors, (2448), 17 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:57,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:57,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:35:57,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:35:58,077 INFO L124 PetriNetUnfolderBase]: 1337/2505 cut-off events. [2023-11-17 16:35:58,077 INFO L125 PetriNetUnfolderBase]: For 21608/21608 co-relation queries the response was YES. [2023-11-17 16:35:58,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15800 conditions, 2505 events. 1337/2505 cut-off events. For 21608/21608 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 15789 event pairs, 22 based on Foata normal form. 42/2547 useless extension candidates. Maximal degree in co-relation 14394. Up to 911 conditions per place. [2023-11-17 16:35:58,095 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 213 selfloop transitions, 164 changer transitions 6/383 dead transitions. [2023-11-17 16:35:58,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 383 transitions, 5504 flow [2023-11-17 16:35:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 16:35:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 16:35:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2843 transitions. [2023-11-17 16:35:58,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40771547397103114 [2023-11-17 16:35:58,099 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2843 transitions. [2023-11-17 16:35:58,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2843 transitions. [2023-11-17 16:35:58,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:35:58,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2843 transitions. [2023-11-17 16:35:58,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 149.6315789473684) internal successors, (2843), 19 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:58,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 367.0) internal successors, (7340), 20 states have internal predecessors, (7340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:58,107 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 367.0) internal successors, (7340), 20 states have internal predecessors, (7340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:58,107 INFO L175 Difference]: Start difference. First operand has 121 places, 186 transitions, 2609 flow. Second operand 19 states and 2843 transitions. [2023-11-17 16:35:58,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 383 transitions, 5504 flow [2023-11-17 16:35:58,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 383 transitions, 5275 flow, removed 91 selfloop flow, removed 3 redundant places. [2023-11-17 16:35:58,163 INFO L231 Difference]: Finished difference. Result has 146 places, 281 transitions, 4465 flow [2023-11-17 16:35:58,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=2488, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4465, PETRI_PLACES=146, PETRI_TRANSITIONS=281} [2023-11-17 16:35:58,163 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2023-11-17 16:35:58,163 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 281 transitions, 4465 flow [2023-11-17 16:35:58,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 144.0) internal successors, (2448), 17 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:58,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:35:58,164 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:35:58,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 16:35:58,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 16:35:58,368 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:35:58,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:35:58,368 INFO L85 PathProgramCache]: Analyzing trace with hash -393192213, now seen corresponding path program 9 times [2023-11-17 16:35:58,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:35:58,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943431613] [2023-11-17 16:35:58,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:35:58,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:35:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:35:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:35:58,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:35:58,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943431613] [2023-11-17 16:35:58,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943431613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:35:58,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556597100] [2023-11-17 16:35:58,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:35:58,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:35:58,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:35:58,464 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) [2023-11-17 16:35:58,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 16:35:58,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:35:58,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:35:58,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 16:35:58,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:35:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:35:58,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:35:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:35:58,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556597100] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:35:58,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:35:58,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2023-11-17 16:35:58,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457931313] [2023-11-17 16:35:58,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:35:58,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:35:58,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:35:58,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:35:58,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:35:58,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:35:58,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 281 transitions, 4465 flow. Second operand has 15 states, 15 states have (on average 144.26666666666668) internal successors, (2164), 15 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:35:58,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:35:58,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:35:58,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:36:00,238 INFO L124 PetriNetUnfolderBase]: 1882/3440 cut-off events. [2023-11-17 16:36:00,238 INFO L125 PetriNetUnfolderBase]: For 51445/51445 co-relation queries the response was YES. [2023-11-17 16:36:00,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26843 conditions, 3440 events. 1882/3440 cut-off events. For 51445/51445 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21200 event pairs, 148 based on Foata normal form. 212/3652 useless extension candidates. Maximal degree in co-relation 24943. Up to 1165 conditions per place. [2023-11-17 16:36:00,261 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 347 selfloop transitions, 243 changer transitions 10/600 dead transitions. [2023-11-17 16:36:00,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 600 transitions, 10479 flow [2023-11-17 16:36:00,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 16:36:00,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 16:36:00,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4160 transitions. [2023-11-17 16:36:00,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048267808485792 [2023-11-17 16:36:00,268 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4160 transitions. [2023-11-17 16:36:00,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4160 transitions. [2023-11-17 16:36:00,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:36:00,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4160 transitions. [2023-11-17 16:36:00,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 148.57142857142858) internal successors, (4160), 28 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:00,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 367.0) internal successors, (10643), 29 states have internal predecessors, (10643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:00,279 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 367.0) internal successors, (10643), 29 states have internal predecessors, (10643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:00,279 INFO L175 Difference]: Start difference. First operand has 146 places, 281 transitions, 4465 flow. Second operand 28 states and 4160 transitions. [2023-11-17 16:36:00,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 600 transitions, 10479 flow [2023-11-17 16:36:00,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 600 transitions, 9587 flow, removed 376 selfloop flow, removed 7 redundant places. [2023-11-17 16:36:00,405 INFO L231 Difference]: Finished difference. Result has 175 places, 399 transitions, 6738 flow [2023-11-17 16:36:00,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=3630, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6738, PETRI_PLACES=175, PETRI_TRANSITIONS=399} [2023-11-17 16:36:00,406 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2023-11-17 16:36:00,406 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 399 transitions, 6738 flow [2023-11-17 16:36:00,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 144.26666666666668) internal successors, (2164), 15 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:00,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:36:00,406 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:36:00,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 16:36:00,611 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,SelfDestructingSolverStorable16 [2023-11-17 16:36:00,611 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:36:00,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:36:00,611 INFO L85 PathProgramCache]: Analyzing trace with hash 873227174, now seen corresponding path program 10 times [2023-11-17 16:36:00,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:36:00,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956974958] [2023-11-17 16:36:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:36:00,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:36:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:36:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:00,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:36:00,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956974958] [2023-11-17 16:36:00,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956974958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:36:00,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446780719] [2023-11-17 16:36:00,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:36:00,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:00,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:36:00,736 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) [2023-11-17 16:36:00,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 16:36:00,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:36:00,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:36:00,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:36:00,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:36:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:00,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:36:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:00,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446780719] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:36:00,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:36:00,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-17 16:36:00,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582812259] [2023-11-17 16:36:00,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:36:00,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:36:00,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:36:00,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:36:00,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:36:00,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:36:00,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 399 transitions, 6738 flow. Second operand has 17 states, 17 states have (on average 143.88235294117646) internal successors, (2446), 17 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:00,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:36:00,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:36:00,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:36:03,047 INFO L124 PetriNetUnfolderBase]: 2139/4099 cut-off events. [2023-11-17 16:36:03,047 INFO L125 PetriNetUnfolderBase]: For 93527/93527 co-relation queries the response was YES. [2023-11-17 16:36:03,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35091 conditions, 4099 events. 2139/4099 cut-off events. For 93527/93527 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27976 event pairs, 360 based on Foata normal form. 18/4117 useless extension candidates. Maximal degree in co-relation 33973. Up to 2161 conditions per place. [2023-11-17 16:36:03,076 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 376 selfloop transitions, 290 changer transitions 5/671 dead transitions. [2023-11-17 16:36:03,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 671 transitions, 12053 flow [2023-11-17 16:36:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 16:36:03,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 16:36:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 6027 transitions. [2023-11-17 16:36:03,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40054495912806537 [2023-11-17 16:36:03,081 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 6027 transitions. [2023-11-17 16:36:03,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 6027 transitions. [2023-11-17 16:36:03,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:36:03,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 6027 transitions. [2023-11-17 16:36:03,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 147.0) internal successors, (6027), 41 states have internal predecessors, (6027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:03,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 367.0) internal successors, (15414), 42 states have internal predecessors, (15414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:03,096 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 367.0) internal successors, (15414), 42 states have internal predecessors, (15414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:03,096 INFO L175 Difference]: Start difference. First operand has 175 places, 399 transitions, 6738 flow. Second operand 41 states and 6027 transitions. [2023-11-17 16:36:03,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 671 transitions, 12053 flow [2023-11-17 16:36:03,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 671 transitions, 10033 flow, removed 764 selfloop flow, removed 9 redundant places. [2023-11-17 16:36:03,312 INFO L231 Difference]: Finished difference. Result has 219 places, 564 transitions, 9067 flow [2023-11-17 16:36:03,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=5364, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=9067, PETRI_PLACES=219, PETRI_TRANSITIONS=564} [2023-11-17 16:36:03,313 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 198 predicate places. [2023-11-17 16:36:03,313 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 564 transitions, 9067 flow [2023-11-17 16:36:03,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 143.88235294117646) internal successors, (2446), 17 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:03,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:36:03,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:36:03,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-17 16:36:03,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:03,518 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:36:03,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:36:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1727727236, now seen corresponding path program 11 times [2023-11-17 16:36:03,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:36:03,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806786832] [2023-11-17 16:36:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:36:03,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:36:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:36:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:03,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:36:03,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806786832] [2023-11-17 16:36:03,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806786832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:36:03,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898425708] [2023-11-17 16:36:03,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:36:03,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:03,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:36:03,699 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:36:03,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 16:36:03,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:36:03,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:36:03,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:36:03,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:36:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:03,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:36:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:03,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898425708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:36:03,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:36:03,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-17 16:36:03,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91223566] [2023-11-17 16:36:03,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:36:03,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:36:03,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:36:03,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:36:03,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:36:03,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:36:03,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 564 transitions, 9067 flow. Second operand has 17 states, 17 states have (on average 143.88235294117646) internal successors, (2446), 17 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:03,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:36:03,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:36:03,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:36:06,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:36:10,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:36:12,583 INFO L124 PetriNetUnfolderBase]: 2872/5614 cut-off events. [2023-11-17 16:36:12,583 INFO L125 PetriNetUnfolderBase]: For 156829/156829 co-relation queries the response was YES. [2023-11-17 16:36:12,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48022 conditions, 5614 events. 2872/5614 cut-off events. For 156829/156829 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 41389 event pairs, 381 based on Foata normal form. 200/5814 useless extension candidates. Maximal degree in co-relation 47073. Up to 2027 conditions per place. [2023-11-17 16:36:12,626 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 605 selfloop transitions, 458 changer transitions 23/1086 dead transitions. [2023-11-17 16:36:12,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 1086 transitions, 19999 flow [2023-11-17 16:36:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-17 16:36:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-17 16:36:12,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 7642 transitions. [2023-11-17 16:36:12,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004401592957451 [2023-11-17 16:36:12,632 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 7642 transitions. [2023-11-17 16:36:12,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 7642 transitions. [2023-11-17 16:36:12,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:36:12,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 7642 transitions. [2023-11-17 16:36:12,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 146.96153846153845) internal successors, (7642), 52 states have internal predecessors, (7642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:12,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 367.0) internal successors, (19451), 53 states have internal predecessors, (19451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:12,651 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 367.0) internal successors, (19451), 53 states have internal predecessors, (19451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:12,652 INFO L175 Difference]: Start difference. First operand has 219 places, 564 transitions, 9067 flow. Second operand 52 states and 7642 transitions. [2023-11-17 16:36:12,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 1086 transitions, 19999 flow [2023-11-17 16:36:13,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 1086 transitions, 17035 flow, removed 1426 selfloop flow, removed 2 redundant places. [2023-11-17 16:36:13,456 INFO L231 Difference]: Finished difference. Result has 293 places, 870 transitions, 14702 flow [2023-11-17 16:36:13,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=7586, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=14702, PETRI_PLACES=293, PETRI_TRANSITIONS=870} [2023-11-17 16:36:13,457 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 272 predicate places. [2023-11-17 16:36:13,457 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 870 transitions, 14702 flow [2023-11-17 16:36:13,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 143.88235294117646) internal successors, (2446), 17 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:13,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:36:13,457 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:36:13,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 16:36:13,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:13,662 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:36:13,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:36:13,662 INFO L85 PathProgramCache]: Analyzing trace with hash -480677598, now seen corresponding path program 12 times [2023-11-17 16:36:13,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:36:13,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203973647] [2023-11-17 16:36:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:36:13,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:36:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:36:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:13,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:36:13,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203973647] [2023-11-17 16:36:13,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203973647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:36:13,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789792136] [2023-11-17 16:36:13,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:36:13,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:13,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:36:13,817 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) [2023-11-17 16:36:13,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 16:36:13,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:36:13,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:36:13,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:36:13,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:36:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:13,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:36:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:14,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789792136] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:36:14,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:36:14,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 16:36:14,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032942996] [2023-11-17 16:36:14,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:36:14,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:36:14,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:36:14,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:36:14,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:36:14,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:36:14,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 870 transitions, 14702 flow. Second operand has 18 states, 18 states have (on average 143.83333333333334) internal successors, (2589), 18 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:14,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:36:14,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:36:14,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:36:18,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:36:20,715 INFO L124 PetriNetUnfolderBase]: 3087/6003 cut-off events. [2023-11-17 16:36:20,715 INFO L125 PetriNetUnfolderBase]: For 159454/159454 co-relation queries the response was YES. [2023-11-17 16:36:20,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53481 conditions, 6003 events. 3087/6003 cut-off events. For 159454/159454 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 44769 event pairs, 450 based on Foata normal form. 100/6103 useless extension candidates. Maximal degree in co-relation 53125. Up to 2522 conditions per place. [2023-11-17 16:36:20,769 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 599 selfloop transitions, 559 changer transitions 0/1158 dead transitions. [2023-11-17 16:36:20,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1158 transitions, 22254 flow [2023-11-17 16:36:20,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-17 16:36:20,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-11-17 16:36:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 8180 transitions. [2023-11-17 16:36:20,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3980147917477618 [2023-11-17 16:36:20,776 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 8180 transitions. [2023-11-17 16:36:20,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 8180 transitions. [2023-11-17 16:36:20,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:36:20,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 8180 transitions. [2023-11-17 16:36:20,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 146.07142857142858) internal successors, (8180), 56 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:20,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 367.0) internal successors, (20919), 57 states have internal predecessors, (20919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:20,796 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 367.0) internal successors, (20919), 57 states have internal predecessors, (20919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:20,797 INFO L175 Difference]: Start difference. First operand has 293 places, 870 transitions, 14702 flow. Second operand 56 states and 8180 transitions. [2023-11-17 16:36:20,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1158 transitions, 22254 flow [2023-11-17 16:36:21,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 1158 transitions, 19250 flow, removed 1404 selfloop flow, removed 10 redundant places. [2023-11-17 16:36:21,962 INFO L231 Difference]: Finished difference. Result has 353 places, 1013 transitions, 16904 flow [2023-11-17 16:36:21,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=12513, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=419, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=16904, PETRI_PLACES=353, PETRI_TRANSITIONS=1013} [2023-11-17 16:36:21,963 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 332 predicate places. [2023-11-17 16:36:21,963 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1013 transitions, 16904 flow [2023-11-17 16:36:21,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 143.83333333333334) internal successors, (2589), 18 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:21,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:36:21,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:36:21,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-17 16:36:22,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:22,168 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:36:22,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:36:22,168 INFO L85 PathProgramCache]: Analyzing trace with hash -181959600, now seen corresponding path program 13 times [2023-11-17 16:36:22,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:36:22,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326807500] [2023-11-17 16:36:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:36:22,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:36:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:36:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:22,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:36:22,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326807500] [2023-11-17 16:36:22,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326807500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:36:22,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159993344] [2023-11-17 16:36:22,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:36:22,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:22,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:36:22,328 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) [2023-11-17 16:36:22,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 16:36:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:36:22,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:36:22,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:36:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:22,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:36:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:22,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159993344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:36:22,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:36:22,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-17 16:36:22,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351426429] [2023-11-17 16:36:22,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:36:22,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:36:22,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:36:22,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:36:22,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:36:22,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:36:22,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1013 transitions, 16904 flow. Second operand has 17 states, 17 states have (on average 143.88235294117646) internal successors, (2446), 17 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:22,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:36:22,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:36:22,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:36:25,560 INFO L124 PetriNetUnfolderBase]: 3443/6637 cut-off events. [2023-11-17 16:36:25,560 INFO L125 PetriNetUnfolderBase]: For 154150/154150 co-relation queries the response was YES. [2023-11-17 16:36:25,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56412 conditions, 6637 events. 3443/6637 cut-off events. For 154150/154150 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 50067 event pairs, 1071 based on Foata normal form. 56/6693 useless extension candidates. Maximal degree in co-relation 55986. Up to 5376 conditions per place. [2023-11-17 16:36:25,614 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 866 selfloop transitions, 430 changer transitions 0/1296 dead transitions. [2023-11-17 16:36:25,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 1296 transitions, 24529 flow [2023-11-17 16:36:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 16:36:25,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 16:36:25,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5424 transitions. [2023-11-17 16:36:25,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994403122468518 [2023-11-17 16:36:25,619 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5424 transitions. [2023-11-17 16:36:25,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5424 transitions. [2023-11-17 16:36:25,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:36:25,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5424 transitions. [2023-11-17 16:36:25,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 146.59459459459458) internal successors, (5424), 37 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:25,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 367.0) internal successors, (13946), 38 states have internal predecessors, (13946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:25,631 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 367.0) internal successors, (13946), 38 states have internal predecessors, (13946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:25,631 INFO L175 Difference]: Start difference. First operand has 353 places, 1013 transitions, 16904 flow. Second operand 37 states and 5424 transitions. [2023-11-17 16:36:25,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 1296 transitions, 24529 flow [2023-11-17 16:36:26,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1296 transitions, 22964 flow, removed 680 selfloop flow, removed 18 redundant places. [2023-11-17 16:36:26,754 INFO L231 Difference]: Finished difference. Result has 387 places, 1200 transitions, 20946 flow [2023-11-17 16:36:26,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=15757, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1011, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=20946, PETRI_PLACES=387, PETRI_TRANSITIONS=1200} [2023-11-17 16:36:26,755 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 366 predicate places. [2023-11-17 16:36:26,755 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1200 transitions, 20946 flow [2023-11-17 16:36:26,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 143.88235294117646) internal successors, (2446), 17 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:26,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:36:26,755 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:36:26,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 16:36:26,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:26,956 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:36:26,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:36:26,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2145151250, now seen corresponding path program 14 times [2023-11-17 16:36:26,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:36:26,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591501127] [2023-11-17 16:36:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:36:26,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:36:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:36:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:27,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:36:27,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591501127] [2023-11-17 16:36:27,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591501127] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:36:27,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152083118] [2023-11-17 16:36:27,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:36:27,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:27,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:36:27,089 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) [2023-11-17 16:36:27,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 16:36:27,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:36:27,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:36:27,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:36:27,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:36:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:27,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:36:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:27,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152083118] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:36:27,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:36:27,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 16:36:27,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671760501] [2023-11-17 16:36:27,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:36:27,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:36:27,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:36:27,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:36:27,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:36:27,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:36:27,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1200 transitions, 20946 flow. Second operand has 18 states, 18 states have (on average 143.72222222222223) internal successors, (2587), 18 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:27,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:36:27,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:36:27,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:36:31,066 INFO L124 PetriNetUnfolderBase]: 3673/7102 cut-off events. [2023-11-17 16:36:31,067 INFO L125 PetriNetUnfolderBase]: For 199183/199183 co-relation queries the response was YES. [2023-11-17 16:36:31,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63477 conditions, 7102 events. 3673/7102 cut-off events. For 199183/199183 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 54139 event pairs, 728 based on Foata normal form. 104/7206 useless extension candidates. Maximal degree in co-relation 63121. Up to 3391 conditions per place. [2023-11-17 16:36:31,133 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 627 selfloop transitions, 770 changer transitions 0/1397 dead transitions. [2023-11-17 16:36:31,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 1397 transitions, 27454 flow [2023-11-17 16:36:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 16:36:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 16:36:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4124 transitions. [2023-11-17 16:36:31,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40132347216815883 [2023-11-17 16:36:31,137 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4124 transitions. [2023-11-17 16:36:31,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4124 transitions. [2023-11-17 16:36:31,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:36:31,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4124 transitions. [2023-11-17 16:36:31,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 147.28571428571428) internal successors, (4124), 28 states have internal predecessors, (4124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:31,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 367.0) internal successors, (10643), 29 states have internal predecessors, (10643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:31,146 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 367.0) internal successors, (10643), 29 states have internal predecessors, (10643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:31,146 INFO L175 Difference]: Start difference. First operand has 387 places, 1200 transitions, 20946 flow. Second operand 28 states and 4124 transitions. [2023-11-17 16:36:31,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 1397 transitions, 27454 flow [2023-11-17 16:36:32,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1397 transitions, 26735 flow, removed 287 selfloop flow, removed 18 redundant places. [2023-11-17 16:36:32,704 INFO L231 Difference]: Finished difference. Result has 399 places, 1308 transitions, 25394 flow [2023-11-17 16:36:32,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=20006, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=658, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=25394, PETRI_PLACES=399, PETRI_TRANSITIONS=1308} [2023-11-17 16:36:32,705 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 378 predicate places. [2023-11-17 16:36:32,705 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 1308 transitions, 25394 flow [2023-11-17 16:36:32,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 143.72222222222223) internal successors, (2587), 18 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:32,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:36:32,706 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:36:32,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 16:36:32,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:32,909 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:36:32,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:36:32,909 INFO L85 PathProgramCache]: Analyzing trace with hash 2105213330, now seen corresponding path program 15 times [2023-11-17 16:36:32,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:36:32,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817162409] [2023-11-17 16:36:32,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:36:32,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:36:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:36:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:33,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:36:33,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817162409] [2023-11-17 16:36:33,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817162409] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:36:33,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980259036] [2023-11-17 16:36:33,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:36:33,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:33,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:36:33,021 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) [2023-11-17 16:36:33,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 16:36:33,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:36:33,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:36:33,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:36:33,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:36:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:33,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:36:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:33,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980259036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:36:33,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:36:33,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-17 16:36:33,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368481665] [2023-11-17 16:36:33,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:36:33,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 16:36:33,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:36:33,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 16:36:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-17 16:36:33,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:36:33,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 1308 transitions, 25394 flow. Second operand has 16 states, 16 states have (on average 144.0625) internal successors, (2305), 16 states have internal predecessors, (2305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:33,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:36:33,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:36:33,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:36:37,021 INFO L124 PetriNetUnfolderBase]: 4561/8859 cut-off events. [2023-11-17 16:36:37,021 INFO L125 PetriNetUnfolderBase]: For 284228/284228 co-relation queries the response was YES. [2023-11-17 16:36:37,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86057 conditions, 8859 events. 4561/8859 cut-off events. For 284228/284228 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 71077 event pairs, 215 based on Foata normal form. 38/8897 useless extension candidates. Maximal degree in co-relation 85480. Up to 4176 conditions per place. [2023-11-17 16:36:37,110 INFO L140 encePairwiseOnDemand]: 362/367 looper letters, 1376 selfloop transitions, 418 changer transitions 4/1798 dead transitions. [2023-11-17 16:36:37,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 1798 transitions, 39593 flow [2023-11-17 16:36:37,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 16:36:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 16:36:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2072 transitions. [2023-11-17 16:36:37,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032697547683924 [2023-11-17 16:36:37,113 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2072 transitions. [2023-11-17 16:36:37,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2072 transitions. [2023-11-17 16:36:37,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:36:37,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2072 transitions. [2023-11-17 16:36:37,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 148.0) internal successors, (2072), 14 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:37,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 367.0) internal successors, (5505), 15 states have internal predecessors, (5505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:37,117 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 367.0) internal successors, (5505), 15 states have internal predecessors, (5505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:37,117 INFO L175 Difference]: Start difference. First operand has 399 places, 1308 transitions, 25394 flow. Second operand 14 states and 2072 transitions. [2023-11-17 16:36:37,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 1798 transitions, 39593 flow [2023-11-17 16:36:39,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1798 transitions, 38800 flow, removed 166 selfloop flow, removed 19 redundant places. [2023-11-17 16:36:39,906 INFO L231 Difference]: Finished difference. Result has 403 places, 1513 transitions, 31173 flow [2023-11-17 16:36:39,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=24738, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=920, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=31173, PETRI_PLACES=403, PETRI_TRANSITIONS=1513} [2023-11-17 16:36:39,907 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 382 predicate places. [2023-11-17 16:36:39,907 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 1513 transitions, 31173 flow [2023-11-17 16:36:39,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 144.0625) internal successors, (2305), 16 states have internal predecessors, (2305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:39,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:36:39,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:36:39,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 16:36:40,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:40,108 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:36:40,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:36:40,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1160581210, now seen corresponding path program 16 times [2023-11-17 16:36:40,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:36:40,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395519828] [2023-11-17 16:36:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:36:40,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:36:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:36:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:40,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:36:40,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395519828] [2023-11-17 16:36:40,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395519828] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:36:40,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582223565] [2023-11-17 16:36:40,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:36:40,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:40,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:36:40,252 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) [2023-11-17 16:36:40,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 16:36:40,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:36:40,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:36:40,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:36:40,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:36:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:40,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:36:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:40,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582223565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:36:40,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:36:40,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 16:36:40,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943034293] [2023-11-17 16:36:40,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:36:40,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:36:40,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:36:40,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:36:40,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:36:40,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:36:40,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1513 transitions, 31173 flow. Second operand has 18 states, 18 states have (on average 143.83333333333334) internal successors, (2589), 18 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:40,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:36:40,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:36:40,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:36:47,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:36:51,875 INFO L124 PetriNetUnfolderBase]: 5834/11237 cut-off events. [2023-11-17 16:36:51,875 INFO L125 PetriNetUnfolderBase]: For 372933/372933 co-relation queries the response was YES. [2023-11-17 16:36:51,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114499 conditions, 11237 events. 5834/11237 cut-off events. For 372933/372933 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 92886 event pairs, 58 based on Foata normal form. 88/11325 useless extension candidates. Maximal degree in co-relation 113943. Up to 2950 conditions per place. [2023-11-17 16:36:52,000 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 1080 selfloop transitions, 1376 changer transitions 41/2497 dead transitions. [2023-11-17 16:36:52,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 2497 transitions, 58253 flow [2023-11-17 16:36:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-17 16:36:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-17 16:36:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 7243 transitions. [2023-11-17 16:36:52,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027692820997609 [2023-11-17 16:36:52,006 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 7243 transitions. [2023-11-17 16:36:52,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 7243 transitions. [2023-11-17 16:36:52,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:36:52,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 7243 transitions. [2023-11-17 16:36:52,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 147.81632653061226) internal successors, (7243), 49 states have internal predecessors, (7243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:52,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 367.0) internal successors, (18350), 50 states have internal predecessors, (18350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:52,021 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 367.0) internal successors, (18350), 50 states have internal predecessors, (18350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:52,021 INFO L175 Difference]: Start difference. First operand has 403 places, 1513 transitions, 31173 flow. Second operand 49 states and 7243 transitions. [2023-11-17 16:36:52,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 2497 transitions, 58253 flow [2023-11-17 16:36:56,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 2497 transitions, 57818 flow, removed 161 selfloop flow, removed 2 redundant places. [2023-11-17 16:36:56,526 INFO L231 Difference]: Finished difference. Result has 477 places, 2089 transitions, 50068 flow [2023-11-17 16:36:56,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=30585, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=840, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=50068, PETRI_PLACES=477, PETRI_TRANSITIONS=2089} [2023-11-17 16:36:56,528 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 456 predicate places. [2023-11-17 16:36:56,528 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 2089 transitions, 50068 flow [2023-11-17 16:36:56,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 143.83333333333334) internal successors, (2589), 18 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:56,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:36:56,528 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:36:56,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-17 16:36:56,732 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,SelfDestructingSolverStorable23 [2023-11-17 16:36:56,733 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:36:56,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:36:56,733 INFO L85 PathProgramCache]: Analyzing trace with hash -725556396, now seen corresponding path program 17 times [2023-11-17 16:36:56,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:36:56,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656180424] [2023-11-17 16:36:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:36:56,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:36:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:36:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:56,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:36:56,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656180424] [2023-11-17 16:36:56,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656180424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:36:56,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980755412] [2023-11-17 16:36:56,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:36:56,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:36:56,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:36:56,870 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) [2023-11-17 16:36:56,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 16:36:56,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:36:56,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:36:56,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:36:56,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:36:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:57,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:36:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:36:57,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980755412] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:36:57,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:36:57,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 16:36:57,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515769638] [2023-11-17 16:36:57,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:36:57,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:36:57,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:36:57,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:36:57,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:36:57,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:36:57,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 2089 transitions, 50068 flow. Second operand has 18 states, 18 states have (on average 143.88888888888889) internal successors, (2590), 18 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:36:57,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:36:57,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:36:57,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:37:06,377 INFO L124 PetriNetUnfolderBase]: 6120/11707 cut-off events. [2023-11-17 16:37:06,377 INFO L125 PetriNetUnfolderBase]: For 498225/498225 co-relation queries the response was YES. [2023-11-17 16:37:06,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134887 conditions, 11707 events. 6120/11707 cut-off events. For 498225/498225 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 97016 event pairs, 42 based on Foata normal form. 22/11729 useless extension candidates. Maximal degree in co-relation 134271. Up to 4436 conditions per place. [2023-11-17 16:37:06,518 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 1096 selfloop transitions, 1427 changer transitions 1/2524 dead transitions. [2023-11-17 16:37:06,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 2524 transitions, 66211 flow [2023-11-17 16:37:06,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 16:37:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 16:37:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6436 transitions. [2023-11-17 16:37:06,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398563289571464 [2023-11-17 16:37:06,522 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6436 transitions. [2023-11-17 16:37:06,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6436 transitions. [2023-11-17 16:37:06,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:37:06,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6436 transitions. [2023-11-17 16:37:06,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 146.27272727272728) internal successors, (6436), 44 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:06,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 367.0) internal successors, (16515), 45 states have internal predecessors, (16515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:06,535 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 367.0) internal successors, (16515), 45 states have internal predecessors, (16515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:06,535 INFO L175 Difference]: Start difference. First operand has 477 places, 2089 transitions, 50068 flow. Second operand 44 states and 6436 transitions. [2023-11-17 16:37:06,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 2524 transitions, 66211 flow [2023-11-17 16:37:16,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 2524 transitions, 62400 flow, removed 1551 selfloop flow, removed 10 redundant places. [2023-11-17 16:37:17,012 INFO L231 Difference]: Finished difference. Result has 526 places, 2330 transitions, 57458 flow [2023-11-17 16:37:17,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=46359, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2085, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=57458, PETRI_PLACES=526, PETRI_TRANSITIONS=2330} [2023-11-17 16:37:17,014 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 505 predicate places. [2023-11-17 16:37:17,014 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 2330 transitions, 57458 flow [2023-11-17 16:37:17,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 143.88888888888889) internal successors, (2590), 18 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:17,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:37:17,014 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:37:17,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 16:37:17,214 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,SelfDestructingSolverStorable24 [2023-11-17 16:37:17,215 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:37:17,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:37:17,215 INFO L85 PathProgramCache]: Analyzing trace with hash -766198030, now seen corresponding path program 18 times [2023-11-17 16:37:17,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:37:17,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556958849] [2023-11-17 16:37:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:37:17,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:37:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:37:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:37:17,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:37:17,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556958849] [2023-11-17 16:37:17,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556958849] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:37:17,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306572274] [2023-11-17 16:37:17,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:37:17,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:37:17,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:37:17,351 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) [2023-11-17 16:37:17,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 16:37:17,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:37:17,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:37:17,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:37:17,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:37:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:37:17,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:37:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:37:17,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306572274] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:37:17,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:37:17,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-17 16:37:17,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334542523] [2023-11-17 16:37:17,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:37:17,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:37:17,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:37:17,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:37:17,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:37:17,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:37:17,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 2330 transitions, 57458 flow. Second operand has 19 states, 19 states have (on average 143.78947368421052) internal successors, (2732), 19 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:17,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:37:17,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:37:17,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:37:21,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:37:29,386 INFO L124 PetriNetUnfolderBase]: 6495/12613 cut-off events. [2023-11-17 16:37:29,386 INFO L125 PetriNetUnfolderBase]: For 520672/520672 co-relation queries the response was YES. [2023-11-17 16:37:29,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145031 conditions, 12613 events. 6495/12613 cut-off events. For 520672/520672 co-relation queries the response was YES. Maximal size of possible extension queue 767. Compared 107217 event pairs, 192 based on Foata normal form. 64/12677 useless extension candidates. Maximal degree in co-relation 144365. Up to 4024 conditions per place. [2023-11-17 16:37:29,547 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 1452 selfloop transitions, 1276 changer transitions 9/2737 dead transitions. [2023-11-17 16:37:29,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 2737 transitions, 73393 flow [2023-11-17 16:37:29,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 16:37:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 16:37:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5028 transitions. [2023-11-17 16:37:29,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40294919057541273 [2023-11-17 16:37:29,550 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5028 transitions. [2023-11-17 16:37:29,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5028 transitions. [2023-11-17 16:37:29,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:37:29,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5028 transitions. [2023-11-17 16:37:29,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 147.88235294117646) internal successors, (5028), 34 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:29,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 367.0) internal successors, (12845), 35 states have internal predecessors, (12845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:29,561 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 367.0) internal successors, (12845), 35 states have internal predecessors, (12845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:29,561 INFO L175 Difference]: Start difference. First operand has 526 places, 2330 transitions, 57458 flow. Second operand 34 states and 5028 transitions. [2023-11-17 16:37:29,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 2737 transitions, 73393 flow [2023-11-17 16:37:39,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 2737 transitions, 71895 flow, removed 606 selfloop flow, removed 8 redundant places. [2023-11-17 16:37:39,270 INFO L231 Difference]: Finished difference. Result has 565 places, 2508 transitions, 65954 flow [2023-11-17 16:37:39,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=55780, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=65954, PETRI_PLACES=565, PETRI_TRANSITIONS=2508} [2023-11-17 16:37:39,272 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 544 predicate places. [2023-11-17 16:37:39,272 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 2508 transitions, 65954 flow [2023-11-17 16:37:39,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 143.78947368421052) internal successors, (2732), 19 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:39,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:37:39,273 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:37:39,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-17 16:37:39,476 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,SelfDestructingSolverStorable25 [2023-11-17 16:37:39,477 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:37:39,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:37:39,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1460411020, now seen corresponding path program 19 times [2023-11-17 16:37:39,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:37:39,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461047748] [2023-11-17 16:37:39,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:37:39,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:37:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:37:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:37:39,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:37:39,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461047748] [2023-11-17 16:37:39,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461047748] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:37:39,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241162515] [2023-11-17 16:37:39,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:37:39,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:37:39,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:37:39,637 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) [2023-11-17 16:37:39,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 16:37:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:37:39,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:37:39,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:37:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:37:39,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:37:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:37:39,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241162515] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:37:39,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:37:39,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 16:37:39,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056576694] [2023-11-17 16:37:39,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:37:39,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:37:39,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:37:39,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:37:39,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:37:39,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:37:39,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 2508 transitions, 65954 flow. Second operand has 18 states, 18 states have (on average 144.22222222222223) internal successors, (2596), 18 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:39,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:37:39,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:37:39,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:37:51,332 INFO L124 PetriNetUnfolderBase]: 6804/13232 cut-off events. [2023-11-17 16:37:51,332 INFO L125 PetriNetUnfolderBase]: For 622599/622599 co-relation queries the response was YES. [2023-11-17 16:37:51,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159000 conditions, 13232 events. 6804/13232 cut-off events. For 622599/622599 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 114011 event pairs, 52 based on Foata normal form. 62/13294 useless extension candidates. Maximal degree in co-relation 158315. Up to 5958 conditions per place. [2023-11-17 16:37:51,619 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 1566 selfloop transitions, 1163 changer transitions 8/2737 dead transitions. [2023-11-17 16:37:51,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 2737 transitions, 76381 flow [2023-11-17 16:37:51,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 16:37:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 16:37:51,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5462 transitions. [2023-11-17 16:37:51,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.402238751012593 [2023-11-17 16:37:51,623 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5462 transitions. [2023-11-17 16:37:51,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5462 transitions. [2023-11-17 16:37:51,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:37:51,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5462 transitions. [2023-11-17 16:37:51,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 147.6216216216216) internal successors, (5462), 37 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:51,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 367.0) internal successors, (13946), 38 states have internal predecessors, (13946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:51,632 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 367.0) internal successors, (13946), 38 states have internal predecessors, (13946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:37:51,633 INFO L175 Difference]: Start difference. First operand has 565 places, 2508 transitions, 65954 flow. Second operand 37 states and 5462 transitions. [2023-11-17 16:37:51,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 2737 transitions, 76381 flow [2023-11-17 16:38:03,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 2737 transitions, 75141 flow, removed 423 selfloop flow, removed 14 redundant places. [2023-11-17 16:38:03,355 INFO L231 Difference]: Finished difference. Result has 598 places, 2587 transitions, 70011 flow [2023-11-17 16:38:03,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=64636, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=70011, PETRI_PLACES=598, PETRI_TRANSITIONS=2587} [2023-11-17 16:38:03,358 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 577 predicate places. [2023-11-17 16:38:03,358 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 2587 transitions, 70011 flow [2023-11-17 16:38:03,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 144.22222222222223) internal successors, (2596), 18 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:03,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:38:03,358 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:38:03,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-17 16:38:03,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:38:03,559 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:38:03,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:38:03,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1011077084, now seen corresponding path program 20 times [2023-11-17 16:38:03,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:38:03,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59658817] [2023-11-17 16:38:03,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:38:03,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:38:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:38:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:38:03,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:38:03,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59658817] [2023-11-17 16:38:03,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59658817] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:38:03,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994518510] [2023-11-17 16:38:03,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:38:03,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:38:03,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:38:03,675 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) [2023-11-17 16:38:03,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 16:38:03,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:38:03,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:38:03,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:38:03,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:38:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:38:03,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:38:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:38:03,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994518510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:38:03,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:38:03,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-17 16:38:03,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993138085] [2023-11-17 16:38:03,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:38:03,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:38:03,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:38:03,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:38:03,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:38:03,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:38:03,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 2587 transitions, 70011 flow. Second operand has 18 states, 18 states have (on average 143.77777777777777) internal successors, (2588), 18 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:03,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:38:03,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:38:03,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:38:14,985 INFO L124 PetriNetUnfolderBase]: 6811/13277 cut-off events. [2023-11-17 16:38:14,985 INFO L125 PetriNetUnfolderBase]: For 655102/655102 co-relation queries the response was YES. [2023-11-17 16:38:15,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163591 conditions, 13277 events. 6811/13277 cut-off events. For 655102/655102 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 114756 event pairs, 94 based on Foata normal form. 42/13319 useless extension candidates. Maximal degree in co-relation 162873. Up to 7004 conditions per place. [2023-11-17 16:38:15,190 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 1966 selfloop transitions, 705 changer transitions 39/2710 dead transitions. [2023-11-17 16:38:15,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 2710 transitions, 78433 flow [2023-11-17 16:38:15,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 16:38:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 16:38:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3973 transitions. [2023-11-17 16:38:15,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.400948632556262 [2023-11-17 16:38:15,193 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3973 transitions. [2023-11-17 16:38:15,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3973 transitions. [2023-11-17 16:38:15,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:38:15,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3973 transitions. [2023-11-17 16:38:15,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 147.14814814814815) internal successors, (3973), 27 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:15,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 367.0) internal successors, (10276), 28 states have internal predecessors, (10276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:15,200 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 367.0) internal successors, (10276), 28 states have internal predecessors, (10276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:15,200 INFO L175 Difference]: Start difference. First operand has 598 places, 2587 transitions, 70011 flow. Second operand 27 states and 3973 transitions. [2023-11-17 16:38:15,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 2710 transitions, 78433 flow [2023-11-17 16:38:28,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 2710 transitions, 75310 flow, removed 784 selfloop flow, removed 17 redundant places. [2023-11-17 16:38:28,873 INFO L231 Difference]: Finished difference. Result has 611 places, 2588 transitions, 69232 flow [2023-11-17 16:38:28,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=66906, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=673, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1885, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=69232, PETRI_PLACES=611, PETRI_TRANSITIONS=2588} [2023-11-17 16:38:28,875 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 590 predicate places. [2023-11-17 16:38:28,875 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 2588 transitions, 69232 flow [2023-11-17 16:38:28,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 143.77777777777777) internal successors, (2588), 18 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:28,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:38:28,875 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:38:28,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 16:38:29,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 16:38:29,080 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:38:29,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:38:29,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1695616676, now seen corresponding path program 21 times [2023-11-17 16:38:29,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:38:29,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071699692] [2023-11-17 16:38:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:38:29,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:38:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:38:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:38:29,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:38:29,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071699692] [2023-11-17 16:38:29,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071699692] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:38:29,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244812550] [2023-11-17 16:38:29,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:38:29,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:38:29,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:38:29,181 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) [2023-11-17 16:38:29,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 16:38:29,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 16:38:29,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:38:29,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:38:29,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:38:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:38:29,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:38:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:38:29,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244812550] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:38:29,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:38:29,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-11-17 16:38:29,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476393692] [2023-11-17 16:38:29,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:38:29,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:38:29,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:38:29,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:38:29,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:38:29,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:38:29,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 2588 transitions, 69232 flow. Second operand has 17 states, 17 states have (on average 143.8235294117647) internal successors, (2445), 17 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:29,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:38:29,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:38:29,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:38:41,221 INFO L124 PetriNetUnfolderBase]: 7011/13551 cut-off events. [2023-11-17 16:38:41,222 INFO L125 PetriNetUnfolderBase]: For 672353/672353 co-relation queries the response was YES. [2023-11-17 16:38:41,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165570 conditions, 13551 events. 7011/13551 cut-off events. For 672353/672353 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 116368 event pairs, 343 based on Foata normal form. 54/13605 useless extension candidates. Maximal degree in co-relation 164825. Up to 10707 conditions per place. [2023-11-17 16:38:41,421 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 2179 selfloop transitions, 597 changer transitions 1/2777 dead transitions. [2023-11-17 16:38:41,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 2777 transitions, 78694 flow [2023-11-17 16:38:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:38:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:38:41,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3557 transitions. [2023-11-17 16:38:41,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40383742052679383 [2023-11-17 16:38:41,424 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3557 transitions. [2023-11-17 16:38:41,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3557 transitions. [2023-11-17 16:38:41,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:38:41,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3557 transitions. [2023-11-17 16:38:41,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 148.20833333333334) internal successors, (3557), 24 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:41,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 367.0) internal successors, (9175), 25 states have internal predecessors, (9175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:41,430 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 367.0) internal successors, (9175), 25 states have internal predecessors, (9175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:41,430 INFO L175 Difference]: Start difference. First operand has 611 places, 2588 transitions, 69232 flow. Second operand 24 states and 3557 transitions. [2023-11-17 16:38:41,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 2777 transitions, 78694 flow [2023-11-17 16:38:53,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 2777 transitions, 77715 flow, removed 290 selfloop flow, removed 16 redundant places. [2023-11-17 16:38:53,836 INFO L231 Difference]: Finished difference. Result has 623 places, 2653 transitions, 71954 flow [2023-11-17 16:38:53,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=68334, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=538, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2005, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=71954, PETRI_PLACES=623, PETRI_TRANSITIONS=2653} [2023-11-17 16:38:53,838 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 602 predicate places. [2023-11-17 16:38:53,838 INFO L495 AbstractCegarLoop]: Abstraction has has 623 places, 2653 transitions, 71954 flow [2023-11-17 16:38:53,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 143.8235294117647) internal successors, (2445), 17 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:53,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:38:53,839 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:38:53,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-17 16:38:54,044 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,SelfDestructingSolverStorable28 [2023-11-17 16:38:54,044 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:38:54,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:38:54,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1005251684, now seen corresponding path program 22 times [2023-11-17 16:38:54,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:38:54,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626440122] [2023-11-17 16:38:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:38:54,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:38:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:38:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:38:54,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:38:54,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626440122] [2023-11-17 16:38:54,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626440122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:38:54,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365404435] [2023-11-17 16:38:54,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:38:54,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:38:54,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:38:54,169 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) [2023-11-17 16:38:54,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 16:38:54,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:38:54,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:38:54,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:38:54,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:38:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:38:54,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:38:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:38:54,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365404435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:38:54,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:38:54,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-17 16:38:54,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802105750] [2023-11-17 16:38:54,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:38:54,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:38:54,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:38:54,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:38:54,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:38:54,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:38:54,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 2653 transitions, 71954 flow. Second operand has 18 states, 18 states have (on average 143.77777777777777) internal successors, (2588), 18 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:38:54,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:38:54,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:38:54,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:07,304 INFO L124 PetriNetUnfolderBase]: 7502/14478 cut-off events. [2023-11-17 16:39:07,304 INFO L125 PetriNetUnfolderBase]: For 766458/766458 co-relation queries the response was YES. [2023-11-17 16:39:07,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181612 conditions, 14478 events. 7502/14478 cut-off events. For 766458/766458 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 125451 event pairs, 302 based on Foata normal form. 84/14562 useless extension candidates. Maximal degree in co-relation 180853. Up to 9655 conditions per place. [2023-11-17 16:39:07,543 INFO L140 encePairwiseOnDemand]: 362/367 looper letters, 1980 selfloop transitions, 873 changer transitions 9/2862 dead transitions. [2023-11-17 16:39:07,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 2862 transitions, 83098 flow [2023-11-17 16:39:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 16:39:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 16:39:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3406 transitions. [2023-11-17 16:39:07,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035066935197251 [2023-11-17 16:39:07,546 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3406 transitions. [2023-11-17 16:39:07,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3406 transitions. [2023-11-17 16:39:07,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:07,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3406 transitions. [2023-11-17 16:39:07,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 148.08695652173913) internal successors, (3406), 23 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:07,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 367.0) internal successors, (8808), 24 states have internal predecessors, (8808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:07,552 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 367.0) internal successors, (8808), 24 states have internal predecessors, (8808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:07,552 INFO L175 Difference]: Start difference. First operand has 623 places, 2653 transitions, 71954 flow. Second operand 23 states and 3406 transitions. [2023-11-17 16:39:07,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 2862 transitions, 83098 flow [2023-11-17 16:39:20,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 2862 transitions, 82275 flow, removed 214 selfloop flow, removed 10 redundant places. [2023-11-17 16:39:20,595 INFO L231 Difference]: Finished difference. Result has 640 places, 2740 transitions, 76777 flow [2023-11-17 16:39:20,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=70624, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=777, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=76777, PETRI_PLACES=640, PETRI_TRANSITIONS=2740} [2023-11-17 16:39:20,597 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 619 predicate places. [2023-11-17 16:39:20,597 INFO L495 AbstractCegarLoop]: Abstraction has has 640 places, 2740 transitions, 76777 flow [2023-11-17 16:39:20,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 143.77777777777777) internal successors, (2588), 18 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:20,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:20,597 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:20,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-17 16:39:20,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:20,798 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:39:20,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:20,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1352306856, now seen corresponding path program 23 times [2023-11-17 16:39:20,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:20,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102151906] [2023-11-17 16:39:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:20,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:20,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:20,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102151906] [2023-11-17 16:39:20,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102151906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:20,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336650485] [2023-11-17 16:39:20,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:39:20,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:20,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:20,903 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) [2023-11-17 16:39:20,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 16:39:21,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 16:39:21,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:21,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:39:21,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:39:21,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:39:21,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336650485] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:21,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:21,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-11-17 16:39:21,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428527518] [2023-11-17 16:39:21,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:21,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:39:21,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:21,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:39:21,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:39:21,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:39:21,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 640 places, 2740 transitions, 76777 flow. Second operand has 17 states, 17 states have (on average 143.8235294117647) internal successors, (2445), 17 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:21,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:21,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:39:21,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:39:34,011 INFO L124 PetriNetUnfolderBase]: 7736/14907 cut-off events. [2023-11-17 16:39:34,011 INFO L125 PetriNetUnfolderBase]: For 824972/824972 co-relation queries the response was YES. [2023-11-17 16:39:34,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192914 conditions, 14907 events. 7736/14907 cut-off events. For 824972/824972 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 129899 event pairs, 2854 based on Foata normal form. 64/14971 useless extension candidates. Maximal degree in co-relation 192171. Up to 13502 conditions per place. [2023-11-17 16:39:34,227 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 2613 selfloop transitions, 312 changer transitions 1/2926 dead transitions. [2023-11-17 16:39:34,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 664 places, 2926 transitions, 87372 flow [2023-11-17 16:39:34,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:39:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:39:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3849 transitions. [2023-11-17 16:39:34,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40337455460071264 [2023-11-17 16:39:34,230 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3849 transitions. [2023-11-17 16:39:34,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3849 transitions. [2023-11-17 16:39:34,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:39:34,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3849 transitions. [2023-11-17 16:39:34,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 148.03846153846155) internal successors, (3849), 26 states have internal predecessors, (3849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:34,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 367.0) internal successors, (9909), 27 states have internal predecessors, (9909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:34,236 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 367.0) internal successors, (9909), 27 states have internal predecessors, (9909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:34,236 INFO L175 Difference]: Start difference. First operand has 640 places, 2740 transitions, 76777 flow. Second operand 26 states and 3849 transitions. [2023-11-17 16:39:34,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 664 places, 2926 transitions, 87372 flow [2023-11-17 16:39:48,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 2926 transitions, 85031 flow, removed 351 selfloop flow, removed 19 redundant places. [2023-11-17 16:39:48,360 INFO L231 Difference]: Finished difference. Result has 658 places, 2784 transitions, 77318 flow [2023-11-17 16:39:48,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=74398, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=77318, PETRI_PLACES=658, PETRI_TRANSITIONS=2784} [2023-11-17 16:39:48,362 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 637 predicate places. [2023-11-17 16:39:48,362 INFO L495 AbstractCegarLoop]: Abstraction has has 658 places, 2784 transitions, 77318 flow [2023-11-17 16:39:48,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 143.8235294117647) internal successors, (2445), 17 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:48,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:39:48,363 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:39:48,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-17 16:39:48,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:48,568 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:39:48,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:39:48,568 INFO L85 PathProgramCache]: Analyzing trace with hash 690439616, now seen corresponding path program 24 times [2023-11-17 16:39:48,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:39:48,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021362536] [2023-11-17 16:39:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:39:48,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:39:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:39:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:48,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:39:48,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021362536] [2023-11-17 16:39:48,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021362536] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:39:48,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505320527] [2023-11-17 16:39:48,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:39:48,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:39:48,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:39:48,696 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) [2023-11-17 16:39:48,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 16:39:48,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 16:39:48,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:39:48,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:39:48,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:39:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:48,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:39:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:39:48,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505320527] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:39:48,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:39:48,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 16:39:48,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867375189] [2023-11-17 16:39:48,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:39:48,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:39:48,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:39:48,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:39:48,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:39:48,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:39:48,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 658 places, 2784 transitions, 77318 flow. Second operand has 18 states, 18 states have (on average 144.0) internal successors, (2592), 18 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:39:48,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:39:48,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:39:48,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:02,997 INFO L124 PetriNetUnfolderBase]: 7792/15021 cut-off events. [2023-11-17 16:40:02,997 INFO L125 PetriNetUnfolderBase]: For 809389/809389 co-relation queries the response was YES. [2023-11-17 16:40:03,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194251 conditions, 15021 events. 7792/15021 cut-off events. For 809389/809389 co-relation queries the response was YES. Maximal size of possible extension queue 958. Compared 131230 event pairs, 2075 based on Foata normal form. 32/15053 useless extension candidates. Maximal degree in co-relation 193392. Up to 10485 conditions per place. [2023-11-17 16:40:03,351 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 2364 selfloop transitions, 558 changer transitions 9/2931 dead transitions. [2023-11-17 16:40:03,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 2931 transitions, 86165 flow [2023-11-17 16:40:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:40:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:40:03,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3848 transitions. [2023-11-17 16:40:03,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032697547683924 [2023-11-17 16:40:03,355 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3848 transitions. [2023-11-17 16:40:03,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3848 transitions. [2023-11-17 16:40:03,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:03,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3848 transitions. [2023-11-17 16:40:03,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 148.0) internal successors, (3848), 26 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:03,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 367.0) internal successors, (9909), 27 states have internal predecessors, (9909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:03,362 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 367.0) internal successors, (9909), 27 states have internal predecessors, (9909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:03,362 INFO L175 Difference]: Start difference. First operand has 658 places, 2784 transitions, 77318 flow. Second operand 26 states and 3848 transitions. [2023-11-17 16:40:03,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 2931 transitions, 86165 flow [2023-11-17 16:40:17,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 2931 transitions, 85597 flow, removed 222 selfloop flow, removed 9 redundant places. [2023-11-17 16:40:17,716 INFO L231 Difference]: Finished difference. Result has 679 places, 2817 transitions, 79576 flow [2023-11-17 16:40:17,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=76669, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=522, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=79576, PETRI_PLACES=679, PETRI_TRANSITIONS=2817} [2023-11-17 16:40:17,719 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 658 predicate places. [2023-11-17 16:40:17,719 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 2817 transitions, 79576 flow [2023-11-17 16:40:17,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 144.0) internal successors, (2592), 18 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:17,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:17,720 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:17,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-17 16:40:17,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:17,920 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:40:17,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:17,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1429563006, now seen corresponding path program 25 times [2023-11-17 16:40:17,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:17,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309857363] [2023-11-17 16:40:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:17,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:18,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:18,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309857363] [2023-11-17 16:40:18,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309857363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:40:18,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146583788] [2023-11-17 16:40:18,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:40:18,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:18,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:40:18,055 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) [2023-11-17 16:40:18,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 16:40:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:18,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:40:18,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:40:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:18,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:40:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:18,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146583788] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:40:18,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:40:18,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-17 16:40:18,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332254342] [2023-11-17 16:40:18,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:40:18,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:40:18,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:18,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:40:18,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:40:18,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:40:18,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 2817 transitions, 79576 flow. Second operand has 19 states, 19 states have (on average 143.8421052631579) internal successors, (2733), 19 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:18,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:18,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:40:18,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:40:32,107 INFO L124 PetriNetUnfolderBase]: 8051/15500 cut-off events. [2023-11-17 16:40:32,108 INFO L125 PetriNetUnfolderBase]: For 901056/901056 co-relation queries the response was YES. [2023-11-17 16:40:32,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207835 conditions, 15500 events. 8051/15500 cut-off events. For 901056/901056 co-relation queries the response was YES. Maximal size of possible extension queue 989. Compared 135819 event pairs, 2010 based on Foata normal form. 44/15544 useless extension candidates. Maximal degree in co-relation 206924. Up to 10060 conditions per place. [2023-11-17 16:40:32,342 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 2296 selfloop transitions, 735 changer transitions 12/3043 dead transitions. [2023-11-17 16:40:32,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 3043 transitions, 93151 flow [2023-11-17 16:40:32,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:40:32,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:40:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4288 transitions. [2023-11-17 16:40:32,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40289392088696796 [2023-11-17 16:40:32,345 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4288 transitions. [2023-11-17 16:40:32,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4288 transitions. [2023-11-17 16:40:32,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:40:32,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4288 transitions. [2023-11-17 16:40:32,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 147.86206896551724) internal successors, (4288), 29 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:32,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 367.0) internal successors, (11010), 30 states have internal predecessors, (11010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:32,352 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 367.0) internal successors, (11010), 30 states have internal predecessors, (11010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:32,352 INFO L175 Difference]: Start difference. First operand has 679 places, 2817 transitions, 79576 flow. Second operand 29 states and 4288 transitions. [2023-11-17 16:40:32,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 3043 transitions, 93151 flow [2023-11-17 16:40:47,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 3043 transitions, 92589 flow, removed 192 selfloop flow, removed 15 redundant places. [2023-11-17 16:40:47,366 INFO L231 Difference]: Finished difference. Result has 700 places, 2920 transitions, 86145 flow [2023-11-17 16:40:47,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=78868, PETRI_DIFFERENCE_MINUEND_PLACES=664, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=639, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=86145, PETRI_PLACES=700, PETRI_TRANSITIONS=2920} [2023-11-17 16:40:47,368 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 679 predicate places. [2023-11-17 16:40:47,368 INFO L495 AbstractCegarLoop]: Abstraction has has 700 places, 2920 transitions, 86145 flow [2023-11-17 16:40:47,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 143.8421052631579) internal successors, (2733), 19 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:47,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:40:47,369 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:40:47,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-17 16:40:47,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:47,569 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:40:47,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:40:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash -86675188, now seen corresponding path program 26 times [2023-11-17 16:40:47,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:40:47,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907320530] [2023-11-17 16:40:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:40:47,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:40:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:40:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:40:47,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:40:47,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907320530] [2023-11-17 16:40:47,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907320530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:40:47,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121767420] [2023-11-17 16:40:47,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:40:47,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:40:47,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:40:47,673 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) [2023-11-17 16:40:47,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 16:40:47,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:40:47,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:40:47,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:40:47,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:40:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:40:47,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:40:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:40:47,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121767420] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:40:47,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:40:47,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-11-17 16:40:47,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870198376] [2023-11-17 16:40:47,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:40:47,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:40:47,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:40:47,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:40:47,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:40:47,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:40:47,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 2920 transitions, 86145 flow. Second operand has 17 states, 17 states have (on average 143.8235294117647) internal successors, (2445), 17 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:40:47,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:40:47,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:40:47,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:41:02,417 INFO L124 PetriNetUnfolderBase]: 8078/15479 cut-off events. [2023-11-17 16:41:02,417 INFO L125 PetriNetUnfolderBase]: For 930317/930317 co-relation queries the response was YES. [2023-11-17 16:41:02,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212944 conditions, 15479 events. 8078/15479 cut-off events. For 930317/930317 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 134928 event pairs, 2923 based on Foata normal form. 96/15575 useless extension candidates. Maximal degree in co-relation 212131. Up to 14068 conditions per place. [2023-11-17 16:41:02,659 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 2761 selfloop transitions, 330 changer transitions 2/3093 dead transitions. [2023-11-17 16:41:02,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 727 places, 3093 transitions, 97546 flow [2023-11-17 16:41:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 16:41:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 16:41:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4144 transitions. [2023-11-17 16:41:02,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032697547683924 [2023-11-17 16:41:02,663 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4144 transitions. [2023-11-17 16:41:02,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4144 transitions. [2023-11-17 16:41:02,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:41:02,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4144 transitions. [2023-11-17 16:41:02,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 148.0) internal successors, (4144), 28 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:02,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 367.0) internal successors, (10643), 29 states have internal predecessors, (10643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:02,670 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 367.0) internal successors, (10643), 29 states have internal predecessors, (10643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:02,670 INFO L175 Difference]: Start difference. First operand has 700 places, 2920 transitions, 86145 flow. Second operand 28 states and 4144 transitions. [2023-11-17 16:41:02,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 727 places, 3093 transitions, 97546 flow [2023-11-17 16:41:19,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 713 places, 3093 transitions, 93881 flow, removed 1677 selfloop flow, removed 14 redundant places. [2023-11-17 16:41:19,624 INFO L231 Difference]: Finished difference. Result has 730 places, 2970 transitions, 86236 flow [2023-11-17 16:41:19,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=82606, PETRI_DIFFERENCE_MINUEND_PLACES=686, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=86236, PETRI_PLACES=730, PETRI_TRANSITIONS=2970} [2023-11-17 16:41:19,626 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 709 predicate places. [2023-11-17 16:41:19,626 INFO L495 AbstractCegarLoop]: Abstraction has has 730 places, 2970 transitions, 86236 flow [2023-11-17 16:41:19,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 143.8235294117647) internal successors, (2445), 17 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:19,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:41:19,626 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:41:19,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-17 16:41:19,827 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,SelfDestructingSolverStorable33 [2023-11-17 16:41:19,827 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:41:19,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:41:19,827 INFO L85 PathProgramCache]: Analyzing trace with hash 885850182, now seen corresponding path program 27 times [2023-11-17 16:41:19,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:41:19,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294223939] [2023-11-17 16:41:19,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:41:19,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:41:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:41:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:41:19,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:41:19,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294223939] [2023-11-17 16:41:19,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294223939] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:41:19,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469646872] [2023-11-17 16:41:19,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:41:19,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:41:19,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:41:19,932 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) [2023-11-17 16:41:19,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 16:41:20,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:41:20,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:41:20,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:41:20,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:41:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:41:20,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:41:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:41:20,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469646872] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:41:20,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:41:20,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-17 16:41:20,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388195177] [2023-11-17 16:41:20,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:41:20,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:41:20,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:41:20,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:41:20,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:41:20,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:41:20,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 730 places, 2970 transitions, 86236 flow. Second operand has 18 states, 18 states have (on average 143.88888888888889) internal successors, (2590), 18 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:20,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:41:20,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:41:20,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:41:24,783 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 [] [2023-11-17 16:41:37,589 INFO L124 PetriNetUnfolderBase]: 8183/15732 cut-off events. [2023-11-17 16:41:37,589 INFO L125 PetriNetUnfolderBase]: For 897924/897924 co-relation queries the response was YES. [2023-11-17 16:41:37,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212953 conditions, 15732 events. 8183/15732 cut-off events. For 897924/897924 co-relation queries the response was YES. Maximal size of possible extension queue 1011. Compared 138001 event pairs, 2139 based on Foata normal form. 26/15758 useless extension candidates. Maximal degree in co-relation 212127. Up to 9246 conditions per place. [2023-11-17 16:41:37,854 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 2571 selfloop transitions, 515 changer transitions 28/3114 dead transitions. [2023-11-17 16:41:37,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 753 places, 3114 transitions, 96625 flow [2023-11-17 16:41:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:41:37,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:41:37,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3519 transitions. [2023-11-17 16:41:37,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39952316076294275 [2023-11-17 16:41:37,857 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3519 transitions. [2023-11-17 16:41:37,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3519 transitions. [2023-11-17 16:41:37,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:41:37,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3519 transitions. [2023-11-17 16:41:37,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 146.625) internal successors, (3519), 24 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:37,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 367.0) internal successors, (9175), 25 states have internal predecessors, (9175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:37,863 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 367.0) internal successors, (9175), 25 states have internal predecessors, (9175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:37,863 INFO L175 Difference]: Start difference. First operand has 730 places, 2970 transitions, 86236 flow. Second operand 24 states and 3519 transitions. [2023-11-17 16:41:37,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 753 places, 3114 transitions, 96625 flow [2023-11-17 16:41:54,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 745 places, 3114 transitions, 95526 flow, removed 498 selfloop flow, removed 8 redundant places. [2023-11-17 16:41:55,050 INFO L231 Difference]: Finished difference. Result has 751 places, 2985 transitions, 87904 flow [2023-11-17 16:41:55,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=85082, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=87904, PETRI_PLACES=751, PETRI_TRANSITIONS=2985} [2023-11-17 16:41:55,052 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 730 predicate places. [2023-11-17 16:41:55,052 INFO L495 AbstractCegarLoop]: Abstraction has has 751 places, 2985 transitions, 87904 flow [2023-11-17 16:41:55,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 143.88888888888889) internal successors, (2590), 18 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:55,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:41:55,052 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:41:55,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-17 16:41:55,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:41:55,252 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:41:55,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:41:55,253 INFO L85 PathProgramCache]: Analyzing trace with hash -978445716, now seen corresponding path program 28 times [2023-11-17 16:41:55,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:41:55,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294547581] [2023-11-17 16:41:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:41:55,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:41:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:41:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:41:55,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:41:55,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294547581] [2023-11-17 16:41:55,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294547581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:41:55,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530927450] [2023-11-17 16:41:55,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:41:55,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:41:55,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:41:55,378 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) [2023-11-17 16:41:55,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 16:41:55,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:41:55,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:41:55,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:41:55,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:41:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:41:55,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:41:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:41:55,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530927450] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:41:55,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:41:55,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-17 16:41:55,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083463963] [2023-11-17 16:41:55,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:41:55,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:41:55,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:41:55,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:41:55,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:41:55,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:41:55,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 2985 transitions, 87904 flow. Second operand has 17 states, 17 states have (on average 144.2941176470588) internal successors, (2453), 17 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:41:55,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:41:55,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:41:55,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:42:12,625 INFO L124 PetriNetUnfolderBase]: 8631/16613 cut-off events. [2023-11-17 16:42:12,625 INFO L125 PetriNetUnfolderBase]: For 1044887/1044887 co-relation queries the response was YES. [2023-11-17 16:42:12,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231600 conditions, 16613 events. 8631/16613 cut-off events. For 1044887/1044887 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 146989 event pairs, 2172 based on Foata normal form. 108/16721 useless extension candidates. Maximal degree in co-relation 230963. Up to 10849 conditions per place. [2023-11-17 16:42:12,906 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 2468 selfloop transitions, 781 changer transitions 1/3250 dead transitions. [2023-11-17 16:42:12,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 769 places, 3250 transitions, 102844 flow [2023-11-17 16:42:12,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:42:12,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:42:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3544 transitions. [2023-11-17 16:42:12,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40236148955495005 [2023-11-17 16:42:12,909 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3544 transitions. [2023-11-17 16:42:12,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3544 transitions. [2023-11-17 16:42:12,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:42:12,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3544 transitions. [2023-11-17 16:42:12,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 147.66666666666666) internal successors, (3544), 24 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:12,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 367.0) internal successors, (9175), 25 states have internal predecessors, (9175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:12,915 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 367.0) internal successors, (9175), 25 states have internal predecessors, (9175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:12,916 INFO L175 Difference]: Start difference. First operand has 751 places, 2985 transitions, 87904 flow. Second operand 24 states and 3544 transitions. [2023-11-17 16:42:12,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 769 places, 3250 transitions, 102844 flow [2023-11-17 16:42:31,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 745 places, 3250 transitions, 101518 flow, removed 408 selfloop flow, removed 24 redundant places. [2023-11-17 16:42:31,656 INFO L231 Difference]: Finished difference. Result has 753 places, 3154 transitions, 95894 flow [2023-11-17 16:42:31,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=86199, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=95894, PETRI_PLACES=753, PETRI_TRANSITIONS=3154} [2023-11-17 16:42:31,658 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 732 predicate places. [2023-11-17 16:42:31,658 INFO L495 AbstractCegarLoop]: Abstraction has has 753 places, 3154 transitions, 95894 flow [2023-11-17 16:42:31,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 144.2941176470588) internal successors, (2453), 17 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:31,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:42:31,659 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:42:31,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-17 16:42:31,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:42:31,859 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:42:31,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:42:31,860 INFO L85 PathProgramCache]: Analyzing trace with hash -777040180, now seen corresponding path program 29 times [2023-11-17 16:42:31,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:42:31,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312334877] [2023-11-17 16:42:31,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:42:31,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:42:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:42:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:42:31,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:42:31,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312334877] [2023-11-17 16:42:31,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312334877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:42:31,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735624094] [2023-11-17 16:42:31,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:42:31,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:42:31,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:42:31,972 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) [2023-11-17 16:42:31,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 16:42:32,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 16:42:32,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:42:32,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:42:32,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:42:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:42:32,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:42:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:42:32,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735624094] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:42:32,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:42:32,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-17 16:42:32,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344355476] [2023-11-17 16:42:32,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:42:32,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:42:32,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:42:32,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:42:32,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:42:32,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:42:32,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 753 places, 3154 transitions, 95894 flow. Second operand has 18 states, 18 states have (on average 143.77777777777777) internal successors, (2588), 18 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:32,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:42:32,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:42:32,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:42:51,065 INFO L124 PetriNetUnfolderBase]: 9290/17963 cut-off events. [2023-11-17 16:42:51,065 INFO L125 PetriNetUnfolderBase]: For 1319098/1319098 co-relation queries the response was YES. [2023-11-17 16:42:51,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261359 conditions, 17963 events. 9290/17963 cut-off events. For 1319098/1319098 co-relation queries the response was YES. Maximal size of possible extension queue 1083. Compared 161554 event pairs, 2778 based on Foata normal form. 28/17991 useless extension candidates. Maximal degree in co-relation 260540. Up to 13193 conditions per place. [2023-11-17 16:42:51,354 INFO L140 encePairwiseOnDemand]: 362/367 looper letters, 2650 selfloop transitions, 753 changer transitions 10/3413 dead transitions. [2023-11-17 16:42:51,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 766 places, 3413 transitions, 111261 flow [2023-11-17 16:42:51,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:42:51,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:42:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2366 transitions. [2023-11-17 16:42:51,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4029291553133515 [2023-11-17 16:42:51,357 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2366 transitions. [2023-11-17 16:42:51,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2366 transitions. [2023-11-17 16:42:51,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:42:51,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2366 transitions. [2023-11-17 16:42:51,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 147.875) internal successors, (2366), 16 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:51,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 367.0) internal successors, (6239), 17 states have internal predecessors, (6239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:51,361 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 367.0) internal successors, (6239), 17 states have internal predecessors, (6239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:42:51,361 INFO L175 Difference]: Start difference. First operand has 753 places, 3154 transitions, 95894 flow. Second operand 16 states and 2366 transitions. [2023-11-17 16:42:51,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 766 places, 3413 transitions, 111261 flow [2023-11-17 16:43:15,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 749 places, 3413 transitions, 106844 flow, removed 1745 selfloop flow, removed 17 redundant places. [2023-11-17 16:43:15,631 INFO L231 Difference]: Finished difference. Result has 752 places, 3301 transitions, 99567 flow [2023-11-17 16:43:15,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=91456, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=604, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=99567, PETRI_PLACES=752, PETRI_TRANSITIONS=3301} [2023-11-17 16:43:15,634 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 731 predicate places. [2023-11-17 16:43:15,634 INFO L495 AbstractCegarLoop]: Abstraction has has 752 places, 3301 transitions, 99567 flow [2023-11-17 16:43:15,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 143.77777777777777) internal successors, (2588), 18 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:15,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:43:15,634 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:43:15,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-17 16:43:15,839 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,SelfDestructingSolverStorable36 [2023-11-17 16:43:15,839 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:43:15,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:43:15,839 INFO L85 PathProgramCache]: Analyzing trace with hash 229225350, now seen corresponding path program 30 times [2023-11-17 16:43:15,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:43:15,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753154794] [2023-11-17 16:43:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:43:15,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:43:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:43:15,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:43:15,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753154794] [2023-11-17 16:43:15,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753154794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:43:15,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461299309] [2023-11-17 16:43:15,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:43:15,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:15,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:43:15,958 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) [2023-11-17 16:43:15,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 16:43:16,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:43:16,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:43:16,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:43:16,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:43:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:43:16,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:43:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:43:16,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461299309] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:43:16,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:43:16,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-17 16:43:16,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154831061] [2023-11-17 16:43:16,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:43:16,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:43:16,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:43:16,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:43:16,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:43:16,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:43:16,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 752 places, 3301 transitions, 99567 flow. Second operand has 14 states, 14 states have (on average 144.5) internal successors, (2023), 14 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:16,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:43:16,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:43:16,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:43:34,259 INFO L124 PetriNetUnfolderBase]: 9206/17819 cut-off events. [2023-11-17 16:43:34,260 INFO L125 PetriNetUnfolderBase]: For 1272375/1272375 co-relation queries the response was YES. [2023-11-17 16:43:34,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255198 conditions, 17819 events. 9206/17819 cut-off events. For 1272375/1272375 co-relation queries the response was YES. Maximal size of possible extension queue 1072. Compared 160642 event pairs, 1384 based on Foata normal form. 48/17867 useless extension candidates. Maximal degree in co-relation 254385. Up to 7486 conditions per place. [2023-11-17 16:43:34,553 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 2172 selfloop transitions, 1212 changer transitions 27/3411 dead transitions. [2023-11-17 16:43:34,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 3411 transitions, 109557 flow [2023-11-17 16:43:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:43:34,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:43:34,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2361 transitions. [2023-11-17 16:43:34,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4020776566757493 [2023-11-17 16:43:34,556 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2361 transitions. [2023-11-17 16:43:34,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2361 transitions. [2023-11-17 16:43:34,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:43:34,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2361 transitions. [2023-11-17 16:43:34,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 147.5625) internal successors, (2361), 16 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:34,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 367.0) internal successors, (6239), 17 states have internal predecessors, (6239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:34,560 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 367.0) internal successors, (6239), 17 states have internal predecessors, (6239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:34,560 INFO L175 Difference]: Start difference. First operand has 752 places, 3301 transitions, 99567 flow. Second operand 16 states and 2361 transitions. [2023-11-17 16:43:34,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 3411 transitions, 109557 flow [2023-11-17 16:43:56,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 758 places, 3411 transitions, 108994 flow, removed 186 selfloop flow, removed 9 redundant places. [2023-11-17 16:43:56,687 INFO L231 Difference]: Finished difference. Result has 760 places, 3293 transitions, 101535 flow [2023-11-17 16:43:56,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=98780, PETRI_DIFFERENCE_MINUEND_PLACES=743, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2098, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=101535, PETRI_PLACES=760, PETRI_TRANSITIONS=3293} [2023-11-17 16:43:56,689 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 739 predicate places. [2023-11-17 16:43:56,689 INFO L495 AbstractCegarLoop]: Abstraction has has 760 places, 3293 transitions, 101535 flow [2023-11-17 16:43:56,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 144.5) internal successors, (2023), 14 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:56,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:43:56,690 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:43:56,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-17 16:43:56,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-17 16:43:56,895 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:43:56,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:43:56,895 INFO L85 PathProgramCache]: Analyzing trace with hash 627065646, now seen corresponding path program 31 times [2023-11-17 16:43:56,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:43:56,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458277578] [2023-11-17 16:43:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:43:56,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:43:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:57,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:43:57,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:43:57,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458277578] [2023-11-17 16:43:57,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458277578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:43:57,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964887694] [2023-11-17 16:43:57,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:43:57,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:43:57,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:43:57,017 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) [2023-11-17 16:43:57,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 16:43:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:43:57,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:43:57,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:43:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:43:57,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:43:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:43:57,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964887694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:43:57,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:43:57,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-17 16:43:57,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249406050] [2023-11-17 16:43:57,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:43:57,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:43:57,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:43:57,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:43:57,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:43:57,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 367 [2023-11-17 16:43:57,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 760 places, 3293 transitions, 101535 flow. Second operand has 17 states, 17 states have (on average 143.88235294117646) internal successors, (2446), 17 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:43:57,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:43:57,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 367 [2023-11-17 16:43:57,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:44:16,674 INFO L124 PetriNetUnfolderBase]: 9233/17977 cut-off events. [2023-11-17 16:44:16,674 INFO L125 PetriNetUnfolderBase]: For 1327434/1327434 co-relation queries the response was YES. [2023-11-17 16:44:16,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263343 conditions, 17977 events. 9233/17977 cut-off events. For 1327434/1327434 co-relation queries the response was YES. Maximal size of possible extension queue 1106. Compared 163719 event pairs, 1383 based on Foata normal form. 44/18021 useless extension candidates. Maximal degree in co-relation 263025. Up to 7492 conditions per place. [2023-11-17 16:44:16,983 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 1718 selfloop transitions, 1744 changer transitions 8/3470 dead transitions. [2023-11-17 16:44:16,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 781 places, 3470 transitions, 113652 flow [2023-11-17 16:44:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 16:44:16,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 16:44:16,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4545 transitions. [2023-11-17 16:44:16,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994901995253582 [2023-11-17 16:44:16,986 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4545 transitions. [2023-11-17 16:44:16,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4545 transitions. [2023-11-17 16:44:16,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:44:16,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4545 transitions. [2023-11-17 16:44:16,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 146.61290322580646) internal successors, (4545), 31 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:16,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 367.0) internal successors, (11744), 32 states have internal predecessors, (11744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:16,993 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 367.0) internal successors, (11744), 32 states have internal predecessors, (11744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:44:16,993 INFO L175 Difference]: Start difference. First operand has 760 places, 3293 transitions, 101535 flow. Second operand 31 states and 4545 transitions. [2023-11-17 16:44:16,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 781 places, 3470 transitions, 113652 flow Received shutdown request... [2023-11-17 16:44:33,582 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 16:44:33,584 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:44:33,584 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 [2023-11-17 16:44:33,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-17 16:44:33,782 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,SelfDestructingSolverStorable38 [2023-11-17 16:44:33,782 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-11-17 16:44:33,784 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 16:44:33,784 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 16:44:33,784 INFO L445 BasicCegarLoop]: Path program histogram: [31, 4, 2, 1, 1] [2023-11-17 16:44:33,786 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:44:33,786 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:44:33,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:44:33 BasicIcfg [2023-11-17 16:44:33,788 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:44:33,788 INFO L158 Benchmark]: Toolchain (without parser) took 542341.92ms. Allocated memory was 320.9MB in the beginning and 2.9GB in the end (delta: 2.6GB). Free memory was 276.0MB in the beginning and 1.1GB in the end (delta: -842.1MB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2023-11-17 16:44:33,788 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 190.8MB. Free memory is still 140.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:44:33,788 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.59ms. Allocated memory is still 320.9MB. Free memory was 275.5MB in the beginning and 263.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-11-17 16:44:33,789 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.40ms. Allocated memory is still 320.9MB. Free memory was 263.4MB in the beginning and 261.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:44:33,789 INFO L158 Benchmark]: Boogie Preprocessor took 25.90ms. Allocated memory is still 320.9MB. Free memory was 261.3MB in the beginning and 259.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 16:44:33,789 INFO L158 Benchmark]: RCFGBuilder took 338.44ms. Allocated memory is still 320.9MB. Free memory was 259.7MB in the beginning and 243.5MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-11-17 16:44:33,789 INFO L158 Benchmark]: TraceAbstraction took 541728.56ms. Allocated memory was 320.9MB in the beginning and 2.9GB in the end (delta: 2.6GB). Free memory was 242.4MB in the beginning and 1.1GB in the end (delta: -875.7MB). Peak memory consumption was 2.8GB. Max. memory is 8.0GB. [2023-11-17 16:44:33,790 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 190.8MB. Free memory is still 140.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 201.59ms. Allocated memory is still 320.9MB. Free memory was 275.5MB in the beginning and 263.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 43.40ms. Allocated memory is still 320.9MB. Free memory was 263.4MB in the beginning and 261.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.90ms. Allocated memory is still 320.9MB. Free memory was 261.3MB in the beginning and 259.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 338.44ms. Allocated memory is still 320.9MB. Free memory was 259.7MB in the beginning and 243.5MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 541728.56ms. Allocated memory was 320.9MB in the beginning and 2.9GB in the end (delta: 2.6GB). Free memory was 242.4MB in the beginning and 1.1GB in the end (delta: -875.7MB). Peak memory consumption was 2.8GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.9s, 155 PlacesBefore, 21 PlacesAfterwards, 162 TransitionsBefore, 17 TransitionsAfterwards, 2268 CoEnabledTransitionPairs, 7 FixpointIterations, 83 TrivialSequentialCompositions, 52 ConcurrentSequentialCompositions, 29 TrivialYvCompositions, 19 ConcurrentYvCompositions, 11 ChoiceCompositions, 194 TotalNumberOfCompositions, 2156 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2119, independent: 2110, independent conditional: 0, independent unconditional: 2110, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1646, independent: 1639, independent conditional: 0, independent unconditional: 1639, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1646, independent: 1639, independent conditional: 0, independent unconditional: 1639, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 21, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2119, independent: 471, independent conditional: 0, independent unconditional: 471, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 1646, unknown conditional: 0, unknown unconditional: 1646] , Statistics on independence cache: Total cache size (in pairs): 26, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 213 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: 541.6s, OverallIterations: 39, TraceHistogramMax: 4, PathProgramHistogramMax: 31, EmptinessCheckTime: 0.0s, AutomataDifference: 509.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.0s, HoareTripleCheckerStatistics: 34 mSolverCounterUnknown, 4457 SdHoareTripleChecker+Valid, 32.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4457 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 30.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 826 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18966 IncrementalHoareTripleChecker+Invalid, 19826 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 826 mSolverCounterUnsat, 0 mSDtfsCounter, 18966 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2634 GetRequests, 1507 SyntacticMatches, 18 SemanticMatches, 1109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11030 ImplicationChecksByTransitivity, 27.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101535occurred in iteration=38, InterpolantAutomatonStates: 845, 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, 1.4s SatisfiabilityAnalysisTime, 16.6s InterpolantComputationTime, 1437 NumberOfCodeBlocks, 1436 NumberOfCodeBlocksAsserted, 116 NumberOfCheckSat, 1986 ConstructedInterpolants, 18 QuantifiedInterpolants, 13948 SizeOfPredicates, 107 NumberOfNonLiveVariables, 6498 ConjunctsInSsa, 484 ConjunctsInUnsatCore, 107 InterpolantComputations, 7 PerfectInterpolantSequences, 472/1000 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