/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/popl20-min-max-inc.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:15:24,862 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:15:24,905 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 16:15:24,919 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:15:24,920 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:15:24,920 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:15:24,920 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:15:24,920 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:15:24,921 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:15:24,921 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:15:24,921 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:15:24,921 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:15:24,921 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:15:24,922 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:15:24,922 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:15:24,922 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:15:24,922 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:15:24,923 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:15:24,923 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:15:24,923 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:15:24,923 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:15:24,924 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:15:24,924 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:15:24,924 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:15:24,924 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:15:24,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:15:24,925 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:15:24,925 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:15:24,925 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:15:24,925 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:15:24,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:15:24,926 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:15:24,926 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:15:25,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:15:25,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:15:25,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:15:25,118 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:15:25,118 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:15:25,119 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2023-11-17 16:15:26,071 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:15:26,215 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:15:26,216 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2023-11-17 16:15:26,222 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e3059501/bf84fa131de0427da57b2f0ebb4af0aa/FLAGa42bd03da [2023-11-17 16:15:26,233 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e3059501/bf84fa131de0427da57b2f0ebb4af0aa [2023-11-17 16:15:26,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:15:26,236 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:15:26,237 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:15:26,237 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:15:26,240 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:15:26,240 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:15:26" (1/1) ... [2023-11-17 16:15:26,241 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f17f566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:15:26, skipping insertion in model container [2023-11-17 16:15:26,241 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:15:26" (1/1) ... [2023-11-17 16:15:26,263 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:15:26,413 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c[3070,3083] [2023-11-17 16:15:26,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:15:26,434 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:15:26,466 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c[3070,3083] [2023-11-17 16:15:26,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:15:26,478 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:15:26,479 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:15:26,483 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:15:26,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:15:26 WrapperNode [2023-11-17 16:15:26,484 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:15:26,487 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:15:26,487 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:15:26,488 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:15:26,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:15:26" (1/1) ... [2023-11-17 16:15:26,509 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:15:26" (1/1) ... [2023-11-17 16:15:26,532 INFO L138 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 141 [2023-11-17 16:15:26,533 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:15:26,534 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:15:26,534 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:15:26,534 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:15:26,540 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:15:26" (1/1) ... [2023-11-17 16:15:26,540 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:15:26" (1/1) ... [2023-11-17 16:15:26,553 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:15:26" (1/1) ... [2023-11-17 16:15:26,553 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:15:26" (1/1) ... [2023-11-17 16:15:26,558 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:15:26" (1/1) ... [2023-11-17 16:15:26,560 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:15:26" (1/1) ... [2023-11-17 16:15:26,561 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:15:26" (1/1) ... [2023-11-17 16:15:26,562 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:15:26" (1/1) ... [2023-11-17 16:15:26,564 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:15:26,576 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:15:26,577 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:15:26,577 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:15:26,577 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:15:26" (1/1) ... [2023-11-17 16:15:26,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:15:26,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:15:26,598 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 16:15:26,620 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 16:15:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:15:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:15:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:15:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:15:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:15:26,624 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:15:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:15:26,624 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:15:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:15:26,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:15:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 16:15:26,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 16:15:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:15:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:15:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:15:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:15:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:15:26,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:15:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:15:26,626 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 16:15:26,724 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:15:26,726 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:15:27,007 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:15:27,059 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:15:27,060 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 16:15:27,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:15:27 BoogieIcfgContainer [2023-11-17 16:15:27,061 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:15:27,062 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:15:27,062 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:15:27,064 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:15:27,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:15:26" (1/3) ... [2023-11-17 16:15:27,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e03244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:15:27, skipping insertion in model container [2023-11-17 16:15:27,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:15:26" (2/3) ... [2023-11-17 16:15:27,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e03244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:15:27, skipping insertion in model container [2023-11-17 16:15:27,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:15:27" (3/3) ... [2023-11-17 16:15:27,066 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2023-11-17 16:15:27,077 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:15:27,077 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:15:27,077 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:15:27,131 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 16:15:27,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 178 transitions, 384 flow [2023-11-17 16:15:27,216 INFO L124 PetriNetUnfolderBase]: 12/174 cut-off events. [2023-11-17 16:15:27,216 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:15:27,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 174 events. 12/174 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 144 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 139. Up to 2 conditions per place. [2023-11-17 16:15:27,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 178 transitions, 384 flow [2023-11-17 16:15:27,228 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 161 transitions, 346 flow [2023-11-17 16:15:27,230 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:15:27,241 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 161 transitions, 346 flow [2023-11-17 16:15:27,244 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 161 transitions, 346 flow [2023-11-17 16:15:27,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 161 transitions, 346 flow [2023-11-17 16:15:27,289 INFO L124 PetriNetUnfolderBase]: 12/161 cut-off events. [2023-11-17 16:15:27,289 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:15:27,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 161 events. 12/161 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 143 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 139. Up to 2 conditions per place. [2023-11-17 16:15:27,293 INFO L119 LiptonReduction]: Number of co-enabled transitions 2932 [2023-11-17 16:15:31,922 INFO L134 LiptonReduction]: Checked pairs total: 3990 [2023-11-17 16:15:31,923 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-11-17 16:15:31,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:15:31,936 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;@15bca5f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:15:31,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 16:15:31,940 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:15:31,940 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2023-11-17 16:15:31,941 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:15:31,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:15:31,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:15:31,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:15:31,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:15:31,944 INFO L85 PathProgramCache]: Analyzing trace with hash -2126012816, now seen corresponding path program 1 times [2023-11-17 16:15:31,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:15:31,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545518883] [2023-11-17 16:15:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:15:31,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:15:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:32,254 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 16:15:32,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:15:32,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545518883] [2023-11-17 16:15:32,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545518883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:15:32,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:15:32,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:15:32,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814050881] [2023-11-17 16:15:32,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:15:32,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:15:32,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:15:32,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:15:32,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:15:32,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 328 [2023-11-17 16:15:32,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 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 16:15:32,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:15:32,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 328 [2023-11-17 16:15:32,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:15:32,484 INFO L124 PetriNetUnfolderBase]: 1312/1790 cut-off events. [2023-11-17 16:15:32,485 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-11-17 16:15:32,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3791 conditions, 1790 events. 1312/1790 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5905 event pairs, 787 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 3330. Up to 1474 conditions per place. [2023-11-17 16:15:32,496 INFO L140 encePairwiseOnDemand]: 324/328 looper letters, 44 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-11-17 16:15:32,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 221 flow [2023-11-17 16:15:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:15:32,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:15:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-11-17 16:15:32,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2023-11-17 16:15:32,512 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-11-17 16:15:32,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-11-17 16:15:32,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:15:32,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-11-17 16:15:32,521 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 16:15:32,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 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 16:15:32,527 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 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 16:15:32,528 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 86 flow. Second operand 4 states and 616 transitions. [2023-11-17 16:15:32,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 221 flow [2023-11-17 16:15:32,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 16:15:32,535 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 84 flow [2023-11-17 16:15:32,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-17 16:15:32,539 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2023-11-17 16:15:32,540 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 84 flow [2023-11-17 16:15:32,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 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 16:15:32,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:15:32,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:15:32,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:15:32,541 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:15:32,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:15:32,542 INFO L85 PathProgramCache]: Analyzing trace with hash 234024453, now seen corresponding path program 1 times [2023-11-17 16:15:32,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:15:32,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450351223] [2023-11-17 16:15:32,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:15:32,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:15:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:32,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:15:32,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450351223] [2023-11-17 16:15:32,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450351223] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:15:32,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:15:32,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:15:32,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874147477] [2023-11-17 16:15:32,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:15:32,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:15:32,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:15:32,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:15:32,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:15:32,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 328 [2023-11-17 16:15:32,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 84 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 16:15:32,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:15:32,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 328 [2023-11-17 16:15:32,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:15:32,871 INFO L124 PetriNetUnfolderBase]: 1632/2222 cut-off events. [2023-11-17 16:15:32,871 INFO L125 PetriNetUnfolderBase]: For 515/515 co-relation queries the response was YES. [2023-11-17 16:15:32,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5065 conditions, 2222 events. 1632/2222 cut-off events. For 515/515 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7613 event pairs, 977 based on Foata normal form. 0/1833 useless extension candidates. Maximal degree in co-relation 1796. Up to 1790 conditions per place. [2023-11-17 16:15:32,880 INFO L140 encePairwiseOnDemand]: 324/328 looper letters, 46 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2023-11-17 16:15:32,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 229 flow [2023-11-17 16:15:32,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:15:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:15:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-11-17 16:15:32,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2023-11-17 16:15:32,883 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-11-17 16:15:32,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-11-17 16:15:32,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:15:32,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-11-17 16:15:32,884 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 16:15:32,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 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 16:15:32,886 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 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 16:15:32,886 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 84 flow. Second operand 4 states and 616 transitions. [2023-11-17 16:15:32,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 229 flow [2023-11-17 16:15:32,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 49 transitions, 219 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 16:15:32,889 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 92 flow [2023-11-17 16:15:32,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-17 16:15:32,890 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2023-11-17 16:15:32,890 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 92 flow [2023-11-17 16:15:32,891 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 16:15:32,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:15:32,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:15:32,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:15:32,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:15:32,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:15:32,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2104391719, now seen corresponding path program 1 times [2023-11-17 16:15:32,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:15:32,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332720721] [2023-11-17 16:15:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:15:32,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:15:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:33,000 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 16:15:33,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:15:33,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332720721] [2023-11-17 16:15:33,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332720721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:15:33,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:15:33,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:15:33,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820234421] [2023-11-17 16:15:33,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:15:33,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:15:33,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:15:33,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:15:33,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:15:33,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 328 [2023-11-17 16:15:33,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 149.25) internal successors, (597), 4 states have internal predecessors, (597), 0 states have call successors, (0), 0 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 16:15:33,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:15:33,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 328 [2023-11-17 16:15:33,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:15:33,220 INFO L124 PetriNetUnfolderBase]: 2138/2902 cut-off events. [2023-11-17 16:15:33,220 INFO L125 PetriNetUnfolderBase]: For 984/984 co-relation queries the response was YES. [2023-11-17 16:15:33,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7067 conditions, 2902 events. 2138/2902 cut-off events. For 984/984 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10518 event pairs, 1243 based on Foata normal form. 0/2449 useless extension candidates. Maximal degree in co-relation 2239. Up to 2222 conditions per place. [2023-11-17 16:15:33,232 INFO L140 encePairwiseOnDemand]: 324/328 looper letters, 49 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-11-17 16:15:33,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 253 flow [2023-11-17 16:15:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:15:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:15:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 617 transitions. [2023-11-17 16:15:33,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47027439024390244 [2023-11-17 16:15:33,234 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 617 transitions. [2023-11-17 16:15:33,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 617 transitions. [2023-11-17 16:15:33,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:15:33,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 617 transitions. [2023-11-17 16:15:33,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 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 16:15:33,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 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 16:15:33,238 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 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 16:15:33,238 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 92 flow. Second operand 4 states and 617 transitions. [2023-11-17 16:15:33,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 253 flow [2023-11-17 16:15:33,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 243 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 16:15:33,241 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 100 flow [2023-11-17 16:15:33,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-11-17 16:15:33,242 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-11-17 16:15:33,242 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 100 flow [2023-11-17 16:15:33,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.25) internal successors, (597), 4 states have internal predecessors, (597), 0 states have call successors, (0), 0 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 16:15:33,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:15:33,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:15:33,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:15:33,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:15:33,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:15:33,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1009909101, now seen corresponding path program 1 times [2023-11-17 16:15:33,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:15:33,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471276100] [2023-11-17 16:15:33,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:15:33,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:15:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:15:33,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:15:33,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471276100] [2023-11-17 16:15:33,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471276100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:15:33,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:15:33,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:15:33,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323511894] [2023-11-17 16:15:33,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:15:33,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:15:33,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:15:33,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:15:33,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:15:33,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 328 [2023-11-17 16:15:33,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 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 16:15:33,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:15:33,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 328 [2023-11-17 16:15:33,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:15:33,532 INFO L124 PetriNetUnfolderBase]: 2138/2903 cut-off events. [2023-11-17 16:15:33,532 INFO L125 PetriNetUnfolderBase]: For 1286/1286 co-relation queries the response was YES. [2023-11-17 16:15:33,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7648 conditions, 2903 events. 2138/2903 cut-off events. For 1286/1286 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10165 event pairs, 1685 based on Foata normal form. 0/2450 useless extension candidates. Maximal degree in co-relation 2581. Up to 2903 conditions per place. [2023-11-17 16:15:33,543 INFO L140 encePairwiseOnDemand]: 325/328 looper letters, 33 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-11-17 16:15:33,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 172 flow [2023-11-17 16:15:33,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:15:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:15:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-11-17 16:15:33,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2023-11-17 16:15:33,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-11-17 16:15:33,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-11-17 16:15:33,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:15:33,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-11-17 16:15:33,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 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 16:15:33,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 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 16:15:33,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 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 16:15:33,547 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 100 flow. Second operand 3 states and 432 transitions. [2023-11-17 16:15:33,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 172 flow [2023-11-17 16:15:33,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 166 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-17 16:15:33,550 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 106 flow [2023-11-17 16:15:33,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-11-17 16:15:33,550 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-11-17 16:15:33,550 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 106 flow [2023-11-17 16:15:33,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 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 16:15:33,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:15:33,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:15:33,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:15:33,551 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:15:33,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:15:33,551 INFO L85 PathProgramCache]: Analyzing trace with hash -302998196, now seen corresponding path program 1 times [2023-11-17 16:15:33,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:15:33,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362891332] [2023-11-17 16:15:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:15:33,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:15:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:15:33,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:15:33,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362891332] [2023-11-17 16:15:33,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362891332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:15:33,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73250348] [2023-11-17 16:15:33,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:15:33,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:15:33,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:15:33,830 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 16:15:33,859 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 16:15:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:33,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:15:33,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:15:34,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:15:34,111 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 23 treesize of output 16 [2023-11-17 16:15:34,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-17 16:15:34,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:15:34,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:15:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:15:34,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73250348] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:15:34,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:15:34,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 8] total 21 [2023-11-17 16:15:34,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192241418] [2023-11-17 16:15:34,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:15:34,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:15:34,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:15:34,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:15:34,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=368, Unknown=7, NotChecked=0, Total=462 [2023-11-17 16:15:34,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 328 [2023-11-17 16:15:34,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 106 flow. Second operand has 22 states, 22 states have (on average 121.0) internal successors, (2662), 22 states have internal predecessors, (2662), 0 states have call successors, (0), 0 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 16:15:34,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:15:34,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 328 [2023-11-17 16:15:34,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:15:39,194 INFO L124 PetriNetUnfolderBase]: 19182/26309 cut-off events. [2023-11-17 16:15:39,195 INFO L125 PetriNetUnfolderBase]: For 7378/7378 co-relation queries the response was YES. [2023-11-17 16:15:39,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68063 conditions, 26309 events. 19182/26309 cut-off events. For 7378/7378 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 144831 event pairs, 1088 based on Foata normal form. 14/20829 useless extension candidates. Maximal degree in co-relation 68049. Up to 5498 conditions per place. [2023-11-17 16:15:39,277 INFO L140 encePairwiseOnDemand]: 314/328 looper letters, 343 selfloop transitions, 111 changer transitions 435/889 dead transitions. [2023-11-17 16:15:39,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 889 transitions, 4437 flow [2023-11-17 16:15:39,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-17 16:15:39,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-17 16:15:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 6777 transitions. [2023-11-17 16:15:39,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40512912482066 [2023-11-17 16:15:39,290 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 6777 transitions. [2023-11-17 16:15:39,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 6777 transitions. [2023-11-17 16:15:39,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:15:39,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 6777 transitions. [2023-11-17 16:15:39,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 132.88235294117646) internal successors, (6777), 51 states have internal predecessors, (6777), 0 states have call successors, (0), 0 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 16:15:39,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 328.0) internal successors, (17056), 52 states have internal predecessors, (17056), 0 states have call successors, (0), 0 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 16:15:39,323 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 328.0) internal successors, (17056), 52 states have internal predecessors, (17056), 0 states have call successors, (0), 0 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 16:15:39,323 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 106 flow. Second operand 51 states and 6777 transitions. [2023-11-17 16:15:39,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 889 transitions, 4437 flow [2023-11-17 16:15:39,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 889 transitions, 4433 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:15:39,428 INFO L231 Difference]: Finished difference. Result has 137 places, 160 transitions, 1176 flow [2023-11-17 16:15:39,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1176, PETRI_PLACES=137, PETRI_TRANSITIONS=160} [2023-11-17 16:15:39,430 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 97 predicate places. [2023-11-17 16:15:39,431 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 160 transitions, 1176 flow [2023-11-17 16:15:39,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 121.0) internal successors, (2662), 22 states have internal predecessors, (2662), 0 states have call successors, (0), 0 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 16:15:39,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:15:39,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:15:39,440 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 16:15:39,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:15:39,638 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:15:39,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:15:39,638 INFO L85 PathProgramCache]: Analyzing trace with hash -869397580, now seen corresponding path program 2 times [2023-11-17 16:15:39,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:15:39,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300189995] [2023-11-17 16:15:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:15:39,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:15:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:15:39,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:15:39,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300189995] [2023-11-17 16:15:39,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300189995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:15:39,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:15:39,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:15:39,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828941314] [2023-11-17 16:15:39,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:15:39,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:15:39,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:15:39,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:15:39,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:15:39,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 328 [2023-11-17 16:15:39,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 160 transitions, 1176 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 16:15:39,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:15:39,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 328 [2023-11-17 16:15:39,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:15:42,264 INFO L124 PetriNetUnfolderBase]: 15188/21151 cut-off events. [2023-11-17 16:15:42,264 INFO L125 PetriNetUnfolderBase]: For 505502/505502 co-relation queries the response was YES. [2023-11-17 16:15:42,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139017 conditions, 21151 events. 15188/21151 cut-off events. For 505502/505502 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 116095 event pairs, 2241 based on Foata normal form. 14/21165 useless extension candidates. Maximal degree in co-relation 138950. Up to 12547 conditions per place. [2023-11-17 16:15:42,410 INFO L140 encePairwiseOnDemand]: 324/328 looper letters, 147 selfloop transitions, 6 changer transitions 254/407 dead transitions. [2023-11-17 16:15:42,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 407 transitions, 3898 flow [2023-11-17 16:15:42,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:15:42,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:15:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 831 transitions. [2023-11-17 16:15:42,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067073170731707 [2023-11-17 16:15:42,412 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 831 transitions. [2023-11-17 16:15:42,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 831 transitions. [2023-11-17 16:15:42,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:15:42,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 831 transitions. [2023-11-17 16:15:42,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 166.2) internal successors, (831), 5 states have internal predecessors, (831), 0 states have call successors, (0), 0 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 16:15:42,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 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 16:15:42,416 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 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 16:15:42,416 INFO L175 Difference]: Start difference. First operand has 137 places, 160 transitions, 1176 flow. Second operand 5 states and 831 transitions. [2023-11-17 16:15:42,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 407 transitions, 3898 flow [2023-11-17 16:15:44,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 407 transitions, 3663 flow, removed 116 selfloop flow, removed 23 redundant places. [2023-11-17 16:15:44,106 INFO L231 Difference]: Finished difference. Result has 96 places, 112 transitions, 765 flow [2023-11-17 16:15:44,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=765, PETRI_PLACES=96, PETRI_TRANSITIONS=112} [2023-11-17 16:15:44,107 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 56 predicate places. [2023-11-17 16:15:44,107 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 112 transitions, 765 flow [2023-11-17 16:15:44,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 16:15:44,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:15:44,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:15:44,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 16:15:44,108 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:15:44,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:15:44,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1671521644, now seen corresponding path program 3 times [2023-11-17 16:15:44,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:15:44,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848457868] [2023-11-17 16:15:44,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:15:44,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:15:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:15:44,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:15:44,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848457868] [2023-11-17 16:15:44,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848457868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:15:44,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053949080] [2023-11-17 16:15:44,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:15:44,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:15:44,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:15:44,431 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 16:15:44,435 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 16:15:44,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:15:44,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:15:44,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 16:15:44,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:15:44,651 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 16:15:44,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:15:44,709 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 16:15:44,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-17 16:15:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:15:44,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:15:44,978 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_188 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_188) c_~A~0.base) c_~A~0.offset))) (or (< c_~min~0 (+ .cse0 2)) (< 2147483646 .cse0)))) is different from false [2023-11-17 16:15:53,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:15:53,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 45 [2023-11-17 16:15:53,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 90 [2023-11-17 16:15:53,185 INFO L160 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:15:53,186 INFO L165 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2023-11-17 16:15:53,193 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 26 treesize of output 24 [2023-11-17 16:15:53,197 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 29 treesize of output 23 [2023-11-17 16:15:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-11-17 16:15:53,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053949080] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:15:53,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:15:53,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 11] total 27 [2023-11-17 16:15:53,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856525473] [2023-11-17 16:15:53,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:15:53,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 16:15:53,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:15:53,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 16:15:53,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=610, Unknown=9, NotChecked=52, Total=812 [2023-11-17 16:15:53,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 328 [2023-11-17 16:15:53,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 112 transitions, 765 flow. Second operand has 29 states, 29 states have (on average 114.0) internal successors, (3306), 29 states have internal predecessors, (3306), 0 states have call successors, (0), 0 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 16:15:53,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:15:53,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 328 [2023-11-17 16:15:53,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:16:01,493 INFO L124 PetriNetUnfolderBase]: 31024/42667 cut-off events. [2023-11-17 16:16:01,493 INFO L125 PetriNetUnfolderBase]: For 788627/788627 co-relation queries the response was YES. [2023-11-17 16:16:01,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272385 conditions, 42667 events. 31024/42667 cut-off events. For 788627/788627 co-relation queries the response was YES. Maximal size of possible extension queue 1526. Compared 251981 event pairs, 1603 based on Foata normal form. 23/42690 useless extension candidates. Maximal degree in co-relation 272337. Up to 13444 conditions per place. [2023-11-17 16:16:01,817 INFO L140 encePairwiseOnDemand]: 314/328 looper letters, 486 selfloop transitions, 228 changer transitions 1055/1769 dead transitions. [2023-11-17 16:16:01,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 1769 transitions, 17761 flow [2023-11-17 16:16:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-17 16:16:01,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-11-17 16:16:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 10004 transitions. [2023-11-17 16:16:01,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3765432098765432 [2023-11-17 16:16:01,831 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 10004 transitions. [2023-11-17 16:16:01,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 10004 transitions. [2023-11-17 16:16:01,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:16:01,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 10004 transitions. [2023-11-17 16:16:01,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 123.50617283950618) internal successors, (10004), 81 states have internal predecessors, (10004), 0 states have call successors, (0), 0 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 16:16:01,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 328.0) internal successors, (26896), 82 states have internal predecessors, (26896), 0 states have call successors, (0), 0 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 16:16:01,886 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 328.0) internal successors, (26896), 82 states have internal predecessors, (26896), 0 states have call successors, (0), 0 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 16:16:01,887 INFO L175 Difference]: Start difference. First operand has 96 places, 112 transitions, 765 flow. Second operand 81 states and 10004 transitions. [2023-11-17 16:16:01,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 1769 transitions, 17761 flow [2023-11-17 16:16:04,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 1769 transitions, 15587 flow, removed 1011 selfloop flow, removed 12 redundant places. [2023-11-17 16:16:04,630 INFO L231 Difference]: Finished difference. Result has 220 places, 311 transitions, 3519 flow [2023-11-17 16:16:04,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=3519, PETRI_PLACES=220, PETRI_TRANSITIONS=311} [2023-11-17 16:16:04,631 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 180 predicate places. [2023-11-17 16:16:04,631 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 311 transitions, 3519 flow [2023-11-17 16:16:04,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.0) internal successors, (3306), 29 states have internal predecessors, (3306), 0 states have call successors, (0), 0 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 16:16:04,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:16:04,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:16:04,636 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 16:16:04,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-17 16:16:04,837 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:16:04,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:16:04,837 INFO L85 PathProgramCache]: Analyzing trace with hash -5902410, now seen corresponding path program 4 times [2023-11-17 16:16:04,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:16:04,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347217627] [2023-11-17 16:16:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:16:04,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:16:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:16:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:16:05,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:16:05,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347217627] [2023-11-17 16:16:05,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347217627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:16:05,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889261898] [2023-11-17 16:16:05,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:16:05,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:16:05,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:16:05,206 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 16:16:05,209 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 16:16:05,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:16:05,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:16:05,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 16:16:05,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:16:05,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:16:05,308 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 250 treesize of output 242 [2023-11-17 16:16:05,407 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 16:16:05,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:16:05,432 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 16:16:05,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-17 16:16:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:16:05,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:16:07,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 97 [2023-11-17 16:16:07,879 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 53 treesize of output 49 [2023-11-17 16:16:07,882 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 89 treesize of output 81 [2023-11-17 16:16:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:16:07,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889261898] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:16:07,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:16:07,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 11] total 26 [2023-11-17 16:16:07,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883648198] [2023-11-17 16:16:07,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:16:07,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 16:16:07,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:16:07,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 16:16:07,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=597, Unknown=18, NotChecked=0, Total=756 [2023-11-17 16:16:07,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 328 [2023-11-17 16:16:07,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 311 transitions, 3519 flow. Second operand has 28 states, 28 states have (on average 117.10714285714286) internal successors, (3279), 28 states have internal predecessors, (3279), 0 states have call successors, (0), 0 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 16:16:07,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:16:07,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 328 [2023-11-17 16:16:07,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:16:17,852 INFO L124 PetriNetUnfolderBase]: 36994/51346 cut-off events. [2023-11-17 16:16:17,852 INFO L125 PetriNetUnfolderBase]: For 4682424/4682424 co-relation queries the response was YES. [2023-11-17 16:16:18,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 574001 conditions, 51346 events. 36994/51346 cut-off events. For 4682424/4682424 co-relation queries the response was YES. Maximal size of possible extension queue 1897. Compared 316317 event pairs, 4156 based on Foata normal form. 16/51362 useless extension candidates. Maximal degree in co-relation 573895. Up to 17406 conditions per place. [2023-11-17 16:16:18,482 INFO L140 encePairwiseOnDemand]: 316/328 looper letters, 384 selfloop transitions, 262 changer transitions 486/1132 dead transitions. [2023-11-17 16:16:18,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 1132 transitions, 17191 flow [2023-11-17 16:16:18,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-17 16:16:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-17 16:16:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4842 transitions. [2023-11-17 16:16:18,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884788189987163 [2023-11-17 16:16:18,488 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4842 transitions. [2023-11-17 16:16:18,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4842 transitions. [2023-11-17 16:16:18,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:16:18,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4842 transitions. [2023-11-17 16:16:18,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 127.42105263157895) internal successors, (4842), 38 states have internal predecessors, (4842), 0 states have call successors, (0), 0 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 16:16:18,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 328.0) internal successors, (12792), 39 states have internal predecessors, (12792), 0 states have call successors, (0), 0 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 16:16:18,504 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 328.0) internal successors, (12792), 39 states have internal predecessors, (12792), 0 states have call successors, (0), 0 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 16:16:18,504 INFO L175 Difference]: Start difference. First operand has 220 places, 311 transitions, 3519 flow. Second operand 38 states and 4842 transitions. [2023-11-17 16:16:18,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 1132 transitions, 17191 flow [2023-11-17 16:16:37,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 1132 transitions, 14221 flow, removed 1356 selfloop flow, removed 39 redundant places. [2023-11-17 16:16:37,115 INFO L231 Difference]: Finished difference. Result has 201 places, 402 transitions, 5715 flow [2023-11-17 16:16:37,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=3179, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5715, PETRI_PLACES=201, PETRI_TRANSITIONS=402} [2023-11-17 16:16:37,116 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 161 predicate places. [2023-11-17 16:16:37,116 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 402 transitions, 5715 flow [2023-11-17 16:16:37,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 117.10714285714286) internal successors, (3279), 28 states have internal predecessors, (3279), 0 states have call successors, (0), 0 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 16:16:37,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:16:37,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:16:37,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 16:16:37,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:16:37,323 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:16:37,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:16:37,323 INFO L85 PathProgramCache]: Analyzing trace with hash 259172294, now seen corresponding path program 5 times [2023-11-17 16:16:37,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:16:37,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919765717] [2023-11-17 16:16:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:16:37,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:16:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:16:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:16:37,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:16:37,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919765717] [2023-11-17 16:16:37,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919765717] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:16:37,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089095256] [2023-11-17 16:16:37,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:16:37,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:16:37,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:16:37,686 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 16:16:37,688 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 16:16:37,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:16:37,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:16:37,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 16:16:37,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:16:37,813 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 16:16:37,839 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 16:16:37,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:16:37,918 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 16:16:37,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:16:37,960 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 23 treesize of output 16 [2023-11-17 16:16:37,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-17 16:16:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:16:38,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:16:38,292 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_285 (Array Int Int)) (v_ArrVal_286 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_286) c_~A~0.base) c_~A~0.offset))) (or (< 2147483646 .cse0) (< .cse0 (select (select .cse1 c_~A~0.base) c_~A~0.offset)) (< c_~min~0 (+ .cse0 2)))))) (forall ((v_ArrVal_285 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285))) (let ((.cse2 (select (select .cse3 c_~A~0.base) c_~A~0.offset))) (or (forall ((v_ArrVal_286 (Array Int Int))) (< .cse2 (+ (select (select (store .cse3 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_286) c_~A~0.base) c_~A~0.offset) 1))) (< 2147483646 .cse2) (< c_~min~0 (+ 2 .cse2))))))) is different from false [2023-11-17 16:16:38,550 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((v_ArrVal_285 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285))) (let ((.cse0 (select (select .cse1 c_~A~0.base) c_~A~0.offset))) (or (forall ((v_ArrVal_286 (Array Int Int))) (< .cse0 (+ (select (select (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_286) c_~A~0.base) c_~A~0.offset) 1))) (< .cse2 (+ 2 .cse0)) (< 2147483646 .cse0))))) (forall ((v_ArrVal_285 (Array Int Int)) (v_ArrVal_286 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285))) (let ((.cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_286) c_~A~0.base) c_~A~0.offset))) (or (< .cse2 (+ .cse3 2)) (< 2147483646 .cse3) (< .cse3 (select (select .cse4 c_~A~0.base) c_~A~0.offset)))))))) is different from false [2023-11-17 16:16:38,597 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_285 (Array Int Int)) (v_ArrVal_284 (Array Int Int)) (v_ArrVal_286 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_284))) (let ((.cse1 (store .cse2 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_286) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< .cse0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (< (select (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ 2 .cse0)) (< 2147483646 .cse0)))))) (forall ((v_ArrVal_285 (Array Int Int)) (v_ArrVal_284 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_284))) (let ((.cse4 (store .cse5 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285))) (let ((.cse3 (select (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (forall ((v_ArrVal_286 (Array Int Int))) (< .cse3 (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_286) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1))) (< 2147483646 .cse3) (< (select (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ 2 .cse3)))))))) is different from false [2023-11-17 16:16:38,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:16:38,610 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 128 treesize of output 80 [2023-11-17 16:16:38,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1780 treesize of output 1628 [2023-11-17 16:16:38,630 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 290 treesize of output 266 [2023-11-17 16:16:38,634 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 266 treesize of output 254 [2023-11-17 16:16:38,640 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 131 treesize of output 121 [2023-11-17 16:16:38,690 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 16:16:38,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 1 [2023-11-17 16:16:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-17 16:16:38,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089095256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:16:38,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:16:38,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 12] total 30 [2023-11-17 16:16:38,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441911212] [2023-11-17 16:16:38,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:16:38,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:16:38,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:16:38,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:16:38,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=656, Unknown=11, NotChecked=168, Total=992 [2023-11-17 16:16:38,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 328 [2023-11-17 16:16:38,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 402 transitions, 5715 flow. Second operand has 32 states, 32 states have (on average 103.875) internal successors, (3324), 32 states have internal predecessors, (3324), 0 states have call successors, (0), 0 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 16:16:38,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:16:38,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 328 [2023-11-17 16:16:38,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:16:52,002 INFO L124 PetriNetUnfolderBase]: 41868/58302 cut-off events. [2023-11-17 16:16:52,002 INFO L125 PetriNetUnfolderBase]: For 4652526/4652526 co-relation queries the response was YES. [2023-11-17 16:16:52,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641301 conditions, 58302 events. 41868/58302 cut-off events. For 4652526/4652526 co-relation queries the response was YES. Maximal size of possible extension queue 2168. Compared 367146 event pairs, 5522 based on Foata normal form. 20/58322 useless extension candidates. Maximal degree in co-relation 641199. Up to 20392 conditions per place. [2023-11-17 16:16:52,706 INFO L140 encePairwiseOnDemand]: 315/328 looper letters, 460 selfloop transitions, 212 changer transitions 583/1255 dead transitions. [2023-11-17 16:16:52,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 1255 transitions, 21256 flow [2023-11-17 16:16:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 16:16:52,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 16:16:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4099 transitions. [2023-11-17 16:16:52,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34713753387533874 [2023-11-17 16:16:52,712 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4099 transitions. [2023-11-17 16:16:52,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4099 transitions. [2023-11-17 16:16:52,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:16:52,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4099 transitions. [2023-11-17 16:16:52,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 113.86111111111111) internal successors, (4099), 36 states have internal predecessors, (4099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:52,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 328.0) internal successors, (12136), 37 states have internal predecessors, (12136), 0 states have call successors, (0), 0 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 16:16:52,723 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 328.0) internal successors, (12136), 37 states have internal predecessors, (12136), 0 states have call successors, (0), 0 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 16:16:52,724 INFO L175 Difference]: Start difference. First operand has 201 places, 402 transitions, 5715 flow. Second operand 36 states and 4099 transitions. [2023-11-17 16:16:52,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 1255 transitions, 21256 flow [2023-11-17 16:17:26,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 1255 transitions, 19006 flow, removed 1098 selfloop flow, removed 23 redundant places. [2023-11-17 16:17:26,568 INFO L231 Difference]: Finished difference. Result has 215 places, 419 transitions, 6565 flow [2023-11-17 16:17:26,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=5413, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6565, PETRI_PLACES=215, PETRI_TRANSITIONS=419} [2023-11-17 16:17:26,569 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 175 predicate places. [2023-11-17 16:17:26,569 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 419 transitions, 6565 flow [2023-11-17 16:17:26,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 103.875) internal successors, (3324), 32 states have internal predecessors, (3324), 0 states have call successors, (0), 0 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 16:17:26,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:17:26,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:17:26,576 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 16:17:26,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:17:26,774 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:17:26,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:17:26,775 INFO L85 PathProgramCache]: Analyzing trace with hash -564324598, now seen corresponding path program 6 times [2023-11-17 16:17:26,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:17:26,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790611074] [2023-11-17 16:17:26,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:17:26,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:17:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:17:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:17:26,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:17:26,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790611074] [2023-11-17 16:17:26,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790611074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:17:26,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:17:26,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:17:26,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605896012] [2023-11-17 16:17:26,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:17:26,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:17:26,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:17:26,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:17:26,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:17:26,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 328 [2023-11-17 16:17:26,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 419 transitions, 6565 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 16:17:26,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:17:26,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 328 [2023-11-17 16:17:26,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:17:35,000 INFO L124 PetriNetUnfolderBase]: 32797/46052 cut-off events. [2023-11-17 16:17:35,000 INFO L125 PetriNetUnfolderBase]: For 3141818/3141818 co-relation queries the response was YES. [2023-11-17 16:17:35,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473518 conditions, 46052 events. 32797/46052 cut-off events. For 3141818/3141818 co-relation queries the response was YES. Maximal size of possible extension queue 1784. Compared 285244 event pairs, 9854 based on Foata normal form. 23/46075 useless extension candidates. Maximal degree in co-relation 473413. Up to 36906 conditions per place. [2023-11-17 16:17:35,552 INFO L140 encePairwiseOnDemand]: 324/328 looper letters, 434 selfloop transitions, 34 changer transitions 254/722 dead transitions. [2023-11-17 16:17:35,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 722 transitions, 12700 flow [2023-11-17 16:17:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:17:35,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:17:35,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 825 transitions. [2023-11-17 16:17:35,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030487804878049 [2023-11-17 16:17:35,553 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 825 transitions. [2023-11-17 16:17:35,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 825 transitions. [2023-11-17 16:17:35,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:17:35,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 825 transitions. [2023-11-17 16:17:35,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.0) internal successors, (825), 5 states have internal predecessors, (825), 0 states have call successors, (0), 0 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 16:17:35,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 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 16:17:35,556 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 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 16:17:35,556 INFO L175 Difference]: Start difference. First operand has 215 places, 419 transitions, 6565 flow. Second operand 5 states and 825 transitions. [2023-11-17 16:17:35,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 722 transitions, 12700 flow [2023-11-17 16:17:49,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 722 transitions, 12351 flow, removed 110 selfloop flow, removed 20 redundant places. [2023-11-17 16:17:49,208 INFO L231 Difference]: Finished difference. Result has 184 places, 409 transitions, 6351 flow [2023-11-17 16:17:49,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=6388, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6351, PETRI_PLACES=184, PETRI_TRANSITIONS=409} [2023-11-17 16:17:49,208 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 144 predicate places. [2023-11-17 16:17:49,208 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 409 transitions, 6351 flow [2023-11-17 16:17:49,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 16:17:49,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:17:49,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:17:49,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 16:17:49,209 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:17:49,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:17:49,209 INFO L85 PathProgramCache]: Analyzing trace with hash 834420358, now seen corresponding path program 7 times [2023-11-17 16:17:49,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:17:49,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82186318] [2023-11-17 16:17:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:17:49,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:17:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:17:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:17:49,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:17:49,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82186318] [2023-11-17 16:17:49,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82186318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:17:49,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607487545] [2023-11-17 16:17:49,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:17:49,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:17:49,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:17:49,422 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 16:17:49,424 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 16:17:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:17:49,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 16:17:49,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:17:49,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-17 16:17:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:17:49,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:17:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:17:49,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607487545] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:17:49,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:17:49,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 8] total 16 [2023-11-17 16:17:49,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69564203] [2023-11-17 16:17:49,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:17:49,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:17:49,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:17:49,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:17:49,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:17:49,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 328 [2023-11-17 16:17:49,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 409 transitions, 6351 flow. Second operand has 8 states, 8 states have (on average 129.875) internal successors, (1039), 8 states have internal predecessors, (1039), 0 states have call successors, (0), 0 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 16:17:49,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:17:49,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 328 [2023-11-17 16:17:49,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:01,554 INFO L124 PetriNetUnfolderBase]: 45845/64104 cut-off events. [2023-11-17 16:18:01,554 INFO L125 PetriNetUnfolderBase]: For 3053479/3053479 co-relation queries the response was YES. [2023-11-17 16:18:02,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587595 conditions, 64104 events. 45845/64104 cut-off events. For 3053479/3053479 co-relation queries the response was YES. Maximal size of possible extension queue 2447. Compared 413923 event pairs, 9609 based on Foata normal form. 10/64114 useless extension candidates. Maximal degree in co-relation 587502. Up to 34755 conditions per place. [2023-11-17 16:18:02,532 INFO L140 encePairwiseOnDemand]: 315/328 looper letters, 520 selfloop transitions, 365 changer transitions 152/1037 dead transitions. [2023-11-17 16:18:02,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1037 transitions, 17491 flow [2023-11-17 16:18:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:18:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:18:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1565 transitions. [2023-11-17 16:18:02,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43375831485587585 [2023-11-17 16:18:02,535 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1565 transitions. [2023-11-17 16:18:02,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1565 transitions. [2023-11-17 16:18:02,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:02,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1565 transitions. [2023-11-17 16:18:02,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 142.27272727272728) internal successors, (1565), 11 states have internal predecessors, (1565), 0 states have call successors, (0), 0 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 16:18:02,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 328.0) internal successors, (3936), 12 states have internal predecessors, (3936), 0 states have call successors, (0), 0 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 16:18:02,539 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 328.0) internal successors, (3936), 12 states have internal predecessors, (3936), 0 states have call successors, (0), 0 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 16:18:02,539 INFO L175 Difference]: Start difference. First operand has 184 places, 409 transitions, 6351 flow. Second operand 11 states and 1565 transitions. [2023-11-17 16:18:02,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1037 transitions, 17491 flow [2023-11-17 16:18:17,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 1037 transitions, 17295 flow, removed 41 selfloop flow, removed 4 redundant places. [2023-11-17 16:18:17,767 INFO L231 Difference]: Finished difference. Result has 197 places, 676 transitions, 11908 flow [2023-11-17 16:18:17,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=6267, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11908, PETRI_PLACES=197, PETRI_TRANSITIONS=676} [2023-11-17 16:18:17,768 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 157 predicate places. [2023-11-17 16:18:17,768 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 676 transitions, 11908 flow [2023-11-17 16:18:17,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 129.875) internal successors, (1039), 8 states have internal predecessors, (1039), 0 states have call successors, (0), 0 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 16:18:17,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:17,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:17,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-17 16:18:17,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-17 16:18:17,969 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:17,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:17,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1595062548, now seen corresponding path program 8 times [2023-11-17 16:18:17,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:17,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227655177] [2023-11-17 16:18:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:17,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:18:18,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:18,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227655177] [2023-11-17 16:18:18,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227655177] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:18:18,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857371147] [2023-11-17 16:18:18,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:18:18,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:18:18,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:18:18,158 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 16:18:18,159 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 16:18:18,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:18:18,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:18:18,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-17 16:18:18,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:18:18,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-17 16:18:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:18,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:18:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:18:18,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857371147] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:18:18,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:18:18,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7] total 19 [2023-11-17 16:18:18,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756371868] [2023-11-17 16:18:18,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:18:18,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:18:18,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:18,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:18:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:18:18,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 328 [2023-11-17 16:18:18,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 676 transitions, 11908 flow. Second operand has 20 states, 20 states have (on average 125.95) internal successors, (2519), 20 states have internal predecessors, (2519), 0 states have call successors, (0), 0 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 16:18:18,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:18,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 328 [2023-11-17 16:18:18,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand